Answer:
Paleobotany is the study of plant fossils
Explanation:
Answer:
The correct answer is plant fossils.
Explanation:
Paleobotany is a science shared by botany and paleontology, which studies the remains of plants that lived in the past. It also includes the use of the remains for the reconstruction of ancient environments and the history of life. It includes the study of fossils of terrestrial plants and marine algae.
Have a nice day!
Why do objects not cool to absolute zero by emitting all their thermal energy
Answer:
Because the object should shrink its volume to zero, which is impossible
Explanation:
Let's talk about gases for simplicity. Ideal gases are governed by the ideal gas equation:
[tex]pV=nRT[/tex]
where
p is the gas pressure
V is the volume of the gas
n is the number of moles
R is the gas constant
T is the absolute temperature
From the formula, we see that T and V are directly proportional: therefore, in order for a gas to have an absolute temperature of zero, it must also have a volume of zero, which is impossible.
Power in a light bulb is voltage times current. A 10 ohm light bulb is connected to a 12 v battery. What is the power of the light bulb? *
120 W
12.2 W
10 W
1.2 W
0.83 W
14.4 W
Answer:
=14.4Watts
Explanation:
Power in a light bulb is calculated by the use of the following formula: P=VI
For the provided scenario, the current will be calculated as follows:
I=V/R
=12V/10Ω
=1.2A
Therefore P=12V×1.2A
=14.4Watts
What is the wavelength of an earthquake wave if it has a speed of 15 km/s and a frequency of 12 Hz?
Explanation:
The velocity [tex]V[/tex] of a wave is given by:
[tex]V=\lambda.f[/tex] (1)
Where:
[tex]\lambda[/tex] is the wavelength of the wave
[tex]f[/tex] is the frequency of the wave. Its unit is Hertz ([tex]1Hz=\frac{1}{s}[/tex])
So, we have to find [tex]\lambda[/tex] from equation (1):
[tex]\lambda=\frac{V}{f}[/tex] (2)
[tex]\lambda=\frac{15km/s}{12Hz}[/tex]
Finally we obtain the wavelength of the earthquake wave:
[tex]\lambda=1.25 km[/tex]
Which of the following accurately describes properties of valence? A. The greater the number of electrons an atom has to borrow or to lend, the greater the activity of the atom. B. Metals tend to have a negative valence and tend to be electron borrowers. C. The smaller the number of electrons an atom has to borrow or to lend, the greater the activity of the atom. D. Nonmetallic elements tend to have a positive valence and tend to be electron borrowers.
Answer:
I've done this test a couple days ago and got a hundred. The answer you are looking for is C, The small the number of electrons and atom has to borrow or to lend, the greater the activity of the atom.
Explanation:
, The small the number of electrons and atom has to borrow or to lend, the greater the activity of the atom.
An engineer is working on a new kind of wire product that is about the size of a bacterium cell. Which kind of technology is the engineer using?
nanotechnology
microtechnology
atomic technology
cellular technology
Microtechnology i hope this will help
Answer: Second option is correct.
Explanation:
An engineer is working on a new kind of wire product that is about the size of a bacterium cell, this kind of technology is known as "Micro technology".
It deals with features near one micrometer.
It is used to create structure having functional feature with at least one dimension.
Hence, Second option is correct.
A bulldozer does 4,500 J of work to push a mound of soil to the top of a ramp that is 15 m high. The ramp is at an
angle of 35° to the ground. How much force did the bulldozer apply to the mound of soil? Round your answer to two
significant figures.
Answer:
170 N
Explanation:
Given in the question that, work a bulldozer can do = 4500 J
Step 1We will use trigonometry identity to find the distance bulldozer will travel up the hill
sin(35) = opp/hypo
sin(35) = 15/hypo
hypo = 15/sin(35)
hypo = 26.15m
Step 2Formula to use
work done = force × distance
Plug values in the above formula
4500 = force x 26.15
force = 4500/26.15
force = 172.08
force ≈ 170 N
Answer:
520 N
Explanation:
How much heat is absorbed by 34g iron skillet its temperature rises from 12c to 24 c ?
Answer:
[tex]1.84\cdot 10^5 J[/tex]
Explanation:
The heat absorbed by the piece of iron is given by:
[tex]Q=mC_S \Delta T[/tex]
where:
m = 34 g is the mass of the piece of iron
[tex]C_s = 450 J/g^{\circ}C[/tex] is the specific heat of iron
[tex]\Delta T=24 C-12 C=12^{\circ}C[/tex] is the variation of temperature of the piece of iron
Substituting numbers into the formula, we find
[tex]Q=(34 g)(450 J/gC)(12 C)=1.84\cdot 10^5 J[/tex]
A positive charge, q1, of 5 µC is 3 × 10–2 m west of a positive charge, q2, of 2 µC. What is the magnitude and direction of the electrical force, Fe, applied by q1 on q2? magnitude: 3 N direction: east magnitude: 3 N direction: west magnitude: 100 N direction: east magnitude: 100 N direction: west
Answer:
magnitude: 100 N direction: east
Explanation:
The electrostatic force between two charges is given by
[tex]F=k\frac{q_1 q_2}{r^2}[/tex]
where
k is the Coulomb's constant
q1 and q2 are the two charges
r is the separation between the charges
In this problem, we have
[tex]q_1 = 5 \mu C = 5\cdot 10^{-6} C[/tex]
[tex]q_2 = 2 \mu C = 2\cdot 10^{-6} C[/tex]
[tex]r=3\cdot 10^{-2} m[/tex]
Substituting into the equation, we find the magnitude of the force
[tex]F=(9\cdot 10^9 N m^2 C^{-2})\frac{(5\cdot 10^{-6}C)(2\cdot 10^{-6}C)}{(3\cdot 10^{-2}m)^2}=100 N[/tex]
Concerning the direction, let's notice that:
- Both charges are positive, so the force between them is repulsive
- The charge q1 is west of the charge q2
- So, the force applied by q1 on q2 must be to the east (away from charge q1)
Answer:
Magnitude 100 N, direction East
Explanation:
Edge test answer confirmed
Ohm’s law is represented by the equation I = V/R. Explain how the current would change if the amount of resistance decreased and the voltage stayed the same.
Answer:
The current is proportional to the voltage and inversely proportional to the resistance. This mean if the resistance decreased and the voltage stayed constant, the current will increase.
Explanation:
Let's star with a closed circuit with a constant voltage of 48V, and a variable resistor selector of 6, 4 and 2 Ohms.
Using Ohm's Law equation [tex]I=\frac{V}{R}[/tex]
With the variable resistor selector on 6 Ohms
[tex]I=\frac{48V}{6ohms} =8A[/tex]
Changing the selector to a 4 Ohms
[tex]I=\frac{48V}{4ohms} = 12A[/tex]
Last, changing the selector to a 2 Ohms
[tex]I=\frac{48V}{2ohms} =24A[/tex]
in a series circuit what effect will adding more resistors to the circuit have
Answer:In a series circuit, adding more resistors increases total resistance and thus lowers current. But the opposite is true in a parallel circuit because adding more resistors in parallel creates more choices and lowers total resistance. If the same battery is connected to the resistors, current will increase.
Explanation:
Answer:
The correct option is "It will increase the equivalent resistance which will decrease the total current".
Explanation:Increasing resistance will always decrease total current as as resistance implies "resisting the current flow"
Which expression is equal to the number of grams (g) in 2.43 kilograms (kg)?
A. 2.43 kg x 1000 g/1 kg
B. 2.43 g x 1 kg/1000 g
C. 1/2.43 kg x 1000 g/1 kg
1/2.43 kg x 1 kg/1000 g
Answer:
A. 2.43 kg x 1000 g/1 kg
Explanation:
We know that the equivalence between grams and kilograms is
[tex]1 kg = 1000 g[/tex]
So, if we want to convert a mass m from kg to g, we just need to multiply the value by the factor [tex]\frac{1000 g}{1 kg}[/tex].
In this problem, the mass is
m = 2.43 kg
Therefore, multiplying by the factor above, we get
[tex]m = 2.43 kg \cdot \frac{ 1000 g}{1 kg}[/tex]
Answer:
A
Explanation:
edge 2020
what are the similarities between thermionic emission and liquid Vapourizartion?
Answer:
they both evaperated bye heat
Explanation:
Thermionic emission and liquid vaporization are related processes where heat is the primary driver of change. Both absorb heat for transformation, thermionic emission for release of electrons and liquid vaporization to turn into steam. They also both impact their surrounding environment.
Explanation:Both thermionic emission and liquid vaporization are processes that are influenced by an increase in heat or temperature. Thermionic emission is the process whereby heat provides sufficient energy to an element enabling it to overcome forces binding it and thus, it releases electrons. On the other hand, liquid vaporization or evaporation is the process whereby a liquid takes in heat from the surroundings and transforms into a gaseous state.
The similarities between these two processes lie in the fact that both are energy-input-driven processes. In both cases, heat energy is absorbed by the substances for transformation: for thermionic emission to release of electrons and, for liquid vaporization to turn into steam. Therefore heat acts as the fundamental driver of change in both instances.
Furthermore, both processes have impact on the surrounding environment. In thermionic emission, the released electrons can affect nearby substances, and in liquid vaporization, the absorbed heat can cool the surroundings. Therefore, both these processes do not just involve the substances undergoing the changes but also influence the larger environment they are a part of.
Learn more about Heat-Driven Processes here:https://brainly.com/question/31477605
#SPJ2
How many lymphatic organs are located in the abdominal cavity
Answer:
There are 7 major organs located in the abdominal cavity.
The major organs located in the abdominal cavity include the stomach, kidneys, liver, spleen, pancreas, small intestine, and large intestine
The abdominal cavity contains two key lymphatic organs, the spleen and numerous lymph nodes. The spleen sifts pathogens from the blood while lymph nodes create and transport lymphocytes for immune defense.
Explanation:The abdominal cavity houses two primary lymphatic organs: the spleen and numerous lymph nodes. The spleen is a major secondary lymphoid organ located in the upper left quadrant of the abdomen near the stomach and left kidney. Its role is to remove pathogens from the blood, hence sometimes referred to as the 'filter of the blood.'
On the other hand, the lymph nodes are small, bean-shaped organs located along the larger lymph vessels in the abdomen. They are pivotal in developing critical immune responses and also serve as a cleaning system for the lymph before the fluid is returned to the heart.
Learn more about Lymphatic Organs here:https://brainly.com/question/13724068
#SPJ3
From the list of activities below, select those that can increase your carbon footprint.
planting a garden
purchasing foods processed in a factory
installing solar panels on your home
driving a car that uses gasoline
keeping non-LED lights on in your home all night
From the list of activities below, select those that can increase your carbon footprint is driving a car that uses gasoline.
What is carbon footprint?The amount of carbon dioxide released into the atmosphere due to the human activities of driving a car or burning plastics, etc is called the carbon footprint.
The gasoline contained in the cars or trucks will burn due to spark in the IC engines. This result in the production of Carbon-di-oxide.
Thus, driving a car that uses gasoline increases footprint.
Learn more about carbon footprint.
https://brainly.com/question/1270740
#SPJ1
Activities from the list that increase your carbon footprint include purchasing factory-processed foods, driving a gasoline-powered car, and using non-LED lights. These actions are less energy-efficient and lead to higher carbon emissions.
From the list of activities provided, those that can increase your carbon footprint include:
Purchasing foods processed in a factory - Factory processing often involves high energy consumption and emissions.Driving a car that uses gasoline - Gasoline combustion releases significant amounts of CO2.Keeping non-LED lights on in your home all night - Traditional incandescent bulbs are less energy-efficient than LEDs.To reduce our carbon footprint, we can switch off lights when not in use, use bicycles, walk, use public transportation, purchase energy-efficient appliances, choose fuel-efficient vehicles, and install solar panels. Engaging in the political process and supporting policies aimed at reducing carbon emissions can also lead to greater collective environmental benefits.
Aman tosses a jart upward with a velocity of 14.1 m/s a 60° angle
Answer:
hold on let me check my answer
Explanation:
The correct answer is that the jart will reach a maximum height of approximately 10.2 meters.
To solve this problem, we need to analyze the vertical component of the jart's initial velocity separately from the horizontal component. Since the jart is tossed at a 60° angle, we can use trigonometry to find the vertical and horizontal components of the initial velocity.
First, let's find the vertical component of the velocity [tex](\(v_{y0}\))[/tex] using the sine function:
[tex]\[v_{y0} = v_0 \cdot \sin(\theta)\][/tex]
where [tex]\(v_0\)[/tex] is the initial velocity (14.1 m/s) and [tex]\(\theta\)[/tex] is the angle of the toss (60°). The sine of 60° is [tex]\(\sqrt{3}/2\)[/tex], so:
[tex]\[v_{y0} = 14.1 \cdot \frac{\sqrt{3}}{2}\][/tex]
Now, we can calculate the maximum height (h) using the kinematic equation for vertical motion:
[tex]\[v_{y}^2 = v_{y0}^2 - 2gh\][/tex]
where [tex]\(v_{y}\)[/tex] is the final vertical velocity (which is 0 m/s at the maximum height), (g) is the acceleration due to gravity (approximately 9.81 m/s ²), and (h) is the maximum height we want to find. Rearranging the equation to solve for (h), we get:
[tex]\[h = \frac{v_{y0}^2}{2g}\][/tex]
Substituting the value of [tex]\(v_{y0}\)[/tex] we found earlier:
[tex]\[h = \frac{(14.1 \cdot \frac{\sqrt{3}}{2})^2}{2 \cdot 9.81}\][/tex]
[tex]\[h = \frac{14.1^2 \cdot (\frac{\sqrt{3}}{2})^2}{19.62}\][/tex]
[tex]\[h = \frac{198.81 \cdot \frac{3}{4}}{19.62}\][/tex]
[tex]\[h = \frac{149.1075}{19.62}\][/tex]
h = 10.2 meters
Therefore, the jart will reach a maximum height of approximately 10.2 meters.
Select all that apply. What is true about the elements of a period?
All of the elements in a period have the same number of atomic orbitals. For example, every element in the top row (the first period) has one orbital for its electrons. All of the elements in the second row (the second period) have two orbitals for their electrons.
6. How much power does it take to lift 30.0 N 10.0 m high in 5.00 s?
Answer:
60 W
Explanation:
The work done in lifting the object is given by:
[tex]W=Fd[/tex]
where
F = 30.0 N is the weight of the object
d = 10.0 m is the displacement covered by the object
Using the formula,
[tex]W=(30.0 N)(10.0 m)=300 J[/tex]
Now we can calculate the power, which is given by
[tex]P=\frac{W}{t}[/tex]
where
W = 300 J is the work done
t = 5.00 s is the time interval
Substituting,
[tex]P=\frac{300 J}{5 s}=60 W[/tex]
The power required to lift a 30.0 N weight to a height of 10.0 m in 5.00 s is calculated using the Power = Work / Time equation. The work, measured in Joules, is determined by multiplying the force (in Newtons) by the distance (in meters). This results in an output of 60.0 Watts.
Explanation:In the field of Physics, the concept of power is defined as the rate of doing work or the amount of energy transferred per unit time. In this situation, we can compute the power required to lift a 30.0 N object to a height of 10.0 m in 5.00 s using the equation: Power = Work / Time. Let us calculate:
First, we find the work done: Work = Force x Distance, so Work = 30.0 N x 10.0 m = 300.0 Joules.
Next, we calculate the power: Power = Work / Time = 300.0 Joules / 5.00 s = 60.0 Watts.
Therefore, it would take approximately 60.0 Watts of power to lift a 30.0 N object to the height of 10.0 m in 5.00 s.
Learn more about Power Calculation here:https://brainly.com/question/31734672
#SPJ3
The magnetic force on a wire 274 cm long is . If electrons move through the wire in 1.90 s, what is the magnitude of magnetic field that is perpendicular to the wire?
Answer:
Matter & Energy
Math Review
Kinematics
Defining Motion
Graphing Motion
Kinematic Equations
Free Fall
Projectile Motion
Relative Velocity
Dynamics
Newton's 1st Law
Free Body Diagrams
Newton's 2nd Law
Static Equilibrium
Newton's 3rd Law
Friction
Ramps and Inclines
Atwood Machines
Momentum
Impulse & Momentum
Conservation Laws
Types of Collisions
Center of Mass
UCM & Gravity
Uniform Circular Motion
Gravity
Kepler's Laws
Rotational Motion
Rotational Kinematics
Torque
Angular Momentum
Rotational KE
Work, Energy & Power
Work
Hooke's Law
Power
Energy
Conservation of Energy
Fluid Mechanics
Density
Pressure
Buoyancy
Pascal's Principle
Fluid Continuity
Bernoulli's Principle
Thermal Physics
Temperature
Thermal Expansion
Heat
Phase Changes
Ideal Gas Law
Thermodynamics
Electrostatics
Electric Charges
Coulomb's Law
Electric Fields
Potential Difference
Capacitors
Current Electricity
Electric Current
Resistance
Ohm's Law
Circuits
Electric Meters
Circuit Analysis
Magnetism
Magnetic Fields
The Compass
Electromagnetism
Microelectronics
Silicon
P-N Junctions
Transistors
Digital Logic
Processing
Integration
Waves & Sound
Wave Characteristics
Wave Equation
Sound
Interference
Doppler Effect
Optics
Reflection
Refraction
Diffraction
EM Spectrum
Modern Physics
Wave-Particle Duality
Models of the Atom
M-E Equivalence
The Standard Model
Relativity
MAGNETISM
Magnetic Fields
The Compass
Electromagnetism
Electromagnetism
In 1820, Danish physicist Hans Christian Oersted found that a current running through a wire created a magnetic field, kicking off the modern study of electromagnetism.
Moving electric charges create magnetic fields. You can test this by placing a compass near a current-carrying wire. The compass will line up with the induced magnetic field.
To determine the direction of the electrically-induced magnetic field due to a long straight current-carrying wire, use the first right hand rule (RHR) by pointing your right-hand thumb in the direction of positive current flow. The curve of your fingers then shows the direction of the magnetic field around a wire (depicted at right).
You can obtain an even stronger magnetic field by wrapping a coil of wire in a series of loops known as a solenoid and flowing current through the wire. This is known as an electromagnet. You can make the magnetic field from the electromagnet even stronger by placing a piece of iron inside the coils of wire. The second right hand rule tells you the direction of the magnetic field due to an electromagnet. Wrap your fingers around the solenoid in the direction of positive current flow. Your thumb will point toward the north end of the induced magnetic field, as shown below.
Explanation:
what is electric force
Electric force occurs between positive and negative electric charge. It can be calculated with formula [tex]F=\frac{Q_1Q_2}{A\epsilon_0\epsilon_r}[/tex] where F is force, Q1 and Q2 are charges, A is area of object usually ball ([tex]A=4\pi r^2[/tex]) because we describe charges as points in space like electrons and protons, [tex]\epsilon_0[/tex] is a natural dielectric constant of empty space or vacuum ([tex]\epsilon_0=8.85\times10^{-12}\mathsf{\frac{As}{Vm}}[/tex]) and [tex]\epsilon_r[/tex] also known as relative dielectric variable.
There are two types of the force:
1. Attractive electric force
2. Repulsive electric force
Attractive electric force occurs between positively and negatively charged objects while repulsive occurs between equally charged objects for eg. (positive and positive will repulse).
If a 20 kg artillery shell is launched vertically with a velocity of 37 m/s, how high in meters does it rise? Use the acceleration due to gravity as 9.8 m/s2.
or-
how do you calculate projectile motion? What are the formulas?
1. 69.8 m
The vertical motion of the shell is a uniformly accelerated motion, with constant acceleration [tex]g=-9.81 m/s^2[/tex] towards the ground (acceleration due to gravity).
At the point of maximum height, the velocity of the projectile is zero:
v = 0
So we can find the maximum height by using the equation:
[tex]v^2 -u^2 = 2gd[/tex]
where
u = 37 m/s is the initial velocity
d is the maximum heigth
Solving for d,
[tex]d=\frac{v^2-u^2}{2g}=\frac{0^2-(37 m/s)^2}{2(-9.81 m/s^2)}=69.8 m[/tex]
2)
A projectile motion consists of two separate motions:
- A uniform motion along the x-direction, with constant velocity given by
[tex]v_x = v_0 cos \theta[/tex]
where [tex]v_0[/tex] is the initial velocity, and [tex]\theta[/tex] the angle of launch
- A unformly accelerated motion along the y-direction, with initial velocity
[tex]v_y = v_0 sin \theta[/tex]
and constant acceleration
[tex]g=-9.81 m/s^2[/tex] (acceleration due to gravity) towards the ground.
The horizontal position of the projectile at time t is given by
[tex]x(t) = v_x t[/tex]
while the vertical position is given by
[tex]y(t) = y_0 + v_0 sin \theta t + \frac{1}{2}gt^2[/tex]
where [tex]y_0[/tex] is the initial height of the projectile.
Final answer:
To calculate the maximum height an artillery shell rises, use the kinematic equation for projectile motion, substituting in the initial velocity, final velocity (0 m/s), and acceleration due to gravity, resulting in approximately 70.14 meters.
Explanation:
Calculating Projectile Motion
To calculate how high a projectile rises, we can use the following kinematic equation which is part of the projectile motion concepts:
vf^2 = vi^2 + 2ad
Where vf is the final velocity, vi is the initial velocity, a is the acceleration, and d is the displacement or height in this case. For a projectile launched vertically, its final velocity at its peak height will be 0 m/s. Hence, solving for d gives us:
d = (vf^2 - vi^2) / (2a)
Substituting the given values: vi = 37 m/s, a = -9.8 m/s2 (the negative sign indicates acceleration is opposite to the direction of the initial velocity), and vf = 0 m/s, we get:
d = (0^2 - 37^2) / (2 * -9.8)
After calculation, the maximum height the artillery shell rises is approximately 70.14 meters.
If a 25 kg object is moving at a velocity of 5 m/s, the object has —— energy.
Any object that's moving has kinetic energy.
Its kinetic energy is (1/2)·(its mass)·(its speed squared) Joules.
A baby carriage is sitting at the top of a hill that is 21 m high. The carriage with the baby has a mass of 4kg. The carriage has —— energy. Calculate it.
Answer:
E=252J
Explanation:
The total mechanical energy of an object or system is given by:
E mech=K+U
Where K is the kinetic energy of the object and U is the potential energy of the object. The carriage, sitting motionless at the top of the hill, has only potential energy in the form of gravitational potential energy.
Gravitational potential energy is given by:
Ug=mgh
Where m is the mass of the object, g is the gravitational acceleration constant, and h is the height of the object above some specific reference point, in this case the ground 21 m below.
The weight of a stationary object at the surface of the earth is equal to the force of gravity acting on the object.
W=→Fg=mg
We are given that the carriage weighs 12 N, therefore mg=12N.
Ug=12N⋅21m
⇒Ug=252Nm=252J
Hope it helped, God bless you!
The baby carriage at the top of the hill possesses gravitational potential energy. Using the formula for potential energy (PE = m x g x h) and given values for mass, gravity, and height, we find the energy of the carriage is 823.2 Joules. The carriage has gravitational potential energy.
Explanation:The energy of the baby carriage at the top of the hill is known as gravitational potential energy, which can be calculated using the formula PE = m x g x h where m is the mass, g is the acceleration due to gravity and h is the height above the ground.
In this case, the mass (m) is 4 kg, the gravitational acceleration (g) is approximately 9.8 m/s², and the height (h) is 21 m. Plugging these values into the formula gives us a potential energy (PE) of PE = 4 kg x 9.8 m/s² x 21 m = 823.2 Joules.
Learn more about Potential Energy here:https://brainly.com/question/18741280
#SPJ2
Which item(s) would be sufficient to make a circuit? A. conductor B. insulator C. conductor and battery D. insulator and battery E. battery
Answer:
C. conductor and battery
Explanation:
An electrical circuit is the part in which two or more conductors are joined in series , parallel or in mixed grouping such that when they are connected to a battery then some current will flow through it.
So here we can say that in order to make a complete circuit we need to take care that current will flow through the combination which will make a circuit
In order to flow the current we need an energy source which is done by the battery and other is the conductor which help to flow the the charge particles.
So here correct answer will be
C. conductor and battery
Answer:
A conductor and a battery
Explanation:
A lighting strike heats the air to about ______ degrees Celsius
Answer:
20,000, though, I'm not completely sure.
Explanation:
"Sound is generated along the length of the lightning channel as the atmosphere is heated by the electrical discharge to the order of 20,000 degrees C (3 times the temperature of the surface of the sun)."
What is shown in the diagram? A). A turbine B). An electromagnet C). A motor D). A generator
Answer:
I just answered a question like this. It should be B. An electromagnet :)
Explanation:
Answer:the answer is a MOTOR!
Explanation: I JUST TOOK THE K12 QUIZ
everyone on brainly is wrong! the answer is MOTOR
50 POINTS
Select all that apply.
The following diagram shows the path of a planet around the Sun. Kepler discovered that _____.
area A = area B
the distance from P 2 to P 3 is half the distance from P 5 to P 6
the speed in the interval from P 1 to P 2 is twice the speed in the interval from P 6 to P 1
the speed in the interval from P 1 to P 2 is less than the speed in the interval from P 3 to P 4
Answer:
The correct answer is: B area = area
Explanation: You can solve this problem through the use of laws of Kepler's planetary motion. There are Kepler the laws ( 3 of them) In this exercise, we will use the second law. According to this law, a line segment joining a planet and the sun sweeps out areas is equal to that during the equal intervals of time
The following diagram shows the path of a planet around the Sun. Kepler discovered that area A = area B. Option A is correct.
What is Kepler's Law ?During equal intervals of time, a line segment between a planet and the sun sweeps out regions are equal. Equal regions for equal times is Kepler's Law.
The journey of a planet around the Sun is depicted in the diagram below. Area A = area B was found by Kepler.
The regions swept away by a planet as it advances in an orbit around the Sun are equal for equal time periods. A: The equal portions of circular orbits are identical in form and size.
To learn more about the Kepler's Law refer:
https://brainly.com/question/1608361
#SPJ2
malcom is doing a wheely on his motorcycle and moving at 20 m/s with a momentum of 6000 kg m/s when he lays her down. The mass of the motorcycle is 190 kg. What is the mass of Malcom?
Answer:
110 kg
Explanation:
The momentum of the Malcom+motorcycle system is given by:
[tex]p=(m+M)v[/tex]
where
(m+M) is the total mass of the system, with
m = mass of Malcom
M = 190 kg (mass of the motorcycle)
v = 20 m/s velocity
Since we know the momentum:
p = 6000 kg m/s
We can re-arrange the equation to find the mass of Malcom:
[tex]m=\frac{p}{v}-M=\frac{6000 kg m/s}{20 m/s}-190 kg=110 kg[/tex]
Leap years _____.happen because the Earth revolves around the sun in less than 365 days
make up for the extra one-fourth day the Earth needs to orbit the sun
add an extra day to the end of December, making the month 32 days long
subtract a day from February, making the month only 27 days long
In the Gregorian calendar (the calendar used in most Western countries), the year begins on January 1st and ends on December 31st, lasting 365 days.
However, the Solar year (the time it takes for the Earth to make its orbit around the sun) lasts a little bit longer: 365 days 5 h 48 min 45.10 s (365.242189 days).
This means there is a gap between the Gregorian calendar and the Solar year. So, the solution given to this situation was to correct the calendar every four years by an unaccounted accumulation of approximately 1/4 of a day per year that equals one extra day, as follows:
"Leap year is divisible by 4, unless it is a secular year (last of each century, ending in 00), in which case it must also be divisible by 400."
This extra day is added in February, after day 28th. That is why every four years we have a February 29th in the Gregorian calendars or a Leap year.
Answer:
Leap years make up for the extra one-fourth day the Earth needs to orbit the sun
Explanation:
In each cycle, a heat engine performs 710 J of work and exhausts 1480 J of heat. What is the thermal effiency?
Answer:
32%
Explanation:
For a heat engine, efficiency is work out divided by heat in:
η = Wₒ / Qᵢ
Since energy is balanced, heat in is the sum of work out and heat out:
Qᵢ = Wₒ + Qₒ
Therefore:
η = Wₒ / (Wₒ + Qₒ)
Given Wₒ = 710 J and Qₒ = 1480 J:
η = 710 / (710 + 1480)
η = 0.32
The thermal efficiency is 32%.
A boy yells in a narrow valley. The sound reflects off of a boulder that is 80m away. HOW LONG will it take to hear the echo if the speed of a sound wave is 320 m/s
Answer:
0.5s
Explanation:
The answer is 0.5s as shown in the image attached.