Answer:
~~Now, you have left your question very open ended and didn't ask for any particular kind of answer so I'll do my best to get what you're looking for.~~
A physical change in a substance doesn't change what the substance is. It can possibly melt or freeze an object. I mean heat makes things expand while cooling makes them retract.... In chemical change where there is a chemical reaction, a new substance is formed and energy is either given off or absorbed.
A new ride being built at an amusement park includes a vertical drop of 126.5 metered. Starting from rest, the ride vertically drops that distance before the track curves forward. If the velocity at the bottom of the drop is 10.0 m/s and the mass of the cart and passengers is 3.5 x 10^4 kg, how much potential energy was converted into thermal energy?
Answer:
The amount of Potential Energy lost in the form of Thermal Energy is equal to 41.64 MJ.
Explanation:
mass of the cart and passengers = m = 3.5*10⁴ kg
Height = h = 126.5 m
g = 9.8 ms⁻²
v = 10 ms⁻¹
At the top position the Total energy of the ride is in the form of potential energy given as:
P.E = mgh
= 3.5*10⁴*9.8*126.5
= 43389500 J
At the bottom of the drop, all the Potential Energy will be converted into K.E as the ride develops speed given as:
K.E = 0.5*m*v²
= 0.5*3.5 x 10⁴*100
= 1750000 J
The K.E is much less than the P.E energy even though all the P.E of the ride has been converted. The loss of energy is due to the formation of thermal energy which can be calculated as:
Thermal Energy lost = Total energy in the form of P.E(top) - Total energy in the form of K.E(bottom)
= 43389500 - 1750000
= 41639500 J
= 41.64 M J approx M J = mega joule = 10⁶ J
True or false graphs must include scales that increase by the same amount
Answer:
True.
Explanation:
Which lists the fundamental forces in order, from strongest to weakest?
strong nuclear, weak nuclear, electromagnetic, gravitational
strong nuclear, electromagnetic, weak nuclear, gravitational
gravitational, weak nuclear, electromagnetic, strong nuclear
electromagnetic, gravitational, strong nuclear, weak nuclear
The answer which lists the fundamental forces in order, from strongest to weakest is:
Strong nuclear forceElectromagnetic forceWeak nuclear forceGravityFundamental forces are those necessary forces which acts on an object, changing its position
Nuclear force is the force which has to do with the nucleus of atoms
An electromagnetic force is one that has to do with en electrically charged particle.
Gravity is the force which acts on a mass of a body, pulling it downwards.
As a result of this, we can see that the strongest force is the nuclear force, while the weakest is the force of gravity.
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Answer:
✅strong nuclear
A. is correct
Explanation:
The beta decay of a radioactive isotope results in the conversion of a neutron into a proton and an electron. Assume that scientists have discovered that a new element is formed. Which of the following would best support our understanding that the proton defines an element’s identity?
Question 3 options:
The atomic number decreases by one.
The atomic number increases by one.
The mass number increases by one.
The mass number decreases by one.
PLEASE HELP ASAPPP
A 16.6 g sample of alcohol absorbs 890 Joules of energy as it is heated. If the initial temperature of the alcohol was
21.5 °C, what is the final temperature of the ethanol?
Answer:
[tex]43.2^{\circ}C[/tex]
Explanation:
The change in temperature of the sample of alcohol is given by:
[tex]\Delta T=\frac{Q}{mC_s}[/tex]
where
Q = 890 J is the amount of heat provided to the sample
m = 16.6 g is the mass of the sample
[tex]C_s = 2.47 J/gC[/tex] is the specific heat of alcohol
Solving the equation,
[tex]\Delta T = \frac{890 J}{(16.6 g)(2.47 J/gC)}=21.7^{\circ}C[/tex]
And since the initial temperature was
[tex]T_i = 21.5^{\circ}C[/tex]
the final temperature is
[tex]T_f = T_i + \Delta T=21.5^{\circ}C + 21.7^{\circ}C=43.2^{\circ}C[/tex]
Emmett is lifting a box vertically. Which forces are necessary for calculating the total force?
Final answer:
To calculate the total force required for lifting a box vertically, consider the weight of the box and the force applied by the person. Add these two forces together, making sure the directions are opposite.
Explanation:
In order to calculate the total force required for lifting a box vertically, you need to consider two main forces:
The weight of the box: This force is equal to the product of the mass of the box and the acceleration due to gravity. It acts vertically downwards.The force applied by the person: This force is exerted in the opposite direction to the weight of the box and is necessary to lift the box.The total force required can be calculated by adding the weight of the box and the force applied by the person. It is important to note that the direction of the force applied by the person should be opposite to the direction of the weight of the box.
Which is an example of an exothermic process?
Answer:
an example of an exthermic process is combustion
Explanation:
combustion is like lighting a candle
The metal aluminum coils in an air conditioner conduct thermal energy from inside the house and release it outside the house. What can be said about the coils when they are accepting the heat inside the house?
Answer:
They must be cooler than the air inside the house.
Explanation:
The metal aluminum coils in an air conditioner conduct thermal energy from inside the house and release it outside the house. It is true to say that the coils are cooler than the air inside the house when they are accepting the heat inside the house. Heat will always flow from hot to cold substances
The aluminum coils in an air conditioner act as evaporator coils when accepting heat inside the house, absorbing thermal energy and transferring it outside after the refrigerant is compressed and condenses to a liquid.
When the aluminum coils in an air conditioner are accepting heat inside the house, they are acting as evaporator coils. During this phase, the coils absorb thermal energy from the indoor air. The electrically driven compressor works to raise the temperature and pressure of the refrigerant, causing it to transfer thermal energy and condense into a liquid. This liquid then moves to the outside of the house, where it passes through a pressure-reducing valve into the outdoor evaporator coils. Here, it expands and cools down, releasing the absorbed heat to the outside environment. This process is dictated by the principles of thermodynamics and is a practical application in cooling a home. Air conditioners and refrigerators work based on the same concept, where their efficiency is measured by the amount of heat transfer per work input, often expressed through the coefficient of performance (COP).
A region of space in which a measurable gravitational force is indicated by the force exerted on a test mass is called
Answer:
Gravitational field
Explanation:
An object of mass M exerts a force (gravitational force) of attraction on any other object of mass m. The magnitude of this force is
[tex]F=G\frac{Mm}{r^2}[/tex]
where G is the gravitational constant and r the separation between the two objects.
Since the object of mass M exerts this force on any other object located around it, we can think as a "gravitational field", which is the region of space around the object of mass M that exerts a gravitational force on other object. This way, the force exerted on another object of mass m can be rewritten as
F = mg
where
[tex]g=\frac{GM}{r^2}[/tex]
is called strength of the gravitational field.
How much force do you push down on the Earth with? (Hint: 1kg is about 2 pounds).
The force with which I push down on the Earth is PRECISELY equal to the force with which the Earth pushes UP on me.
I weigh EXACTLY the same amount on the Earth as the Earth weighs on me. Find THAT amount, and you'll have the answer to the question.
(Hint: 1 kg is a mass, and 2 pounds is a force, so they can never be equal. 1kg weighs about 2.2 pounds IF it happens to be on Earth. But if the same 1kg is on the Moon, then it weighs about 5.8 ounces. And if it happens to be on Mars, then it weighs about 13.3 ounces. The same kilogram weighs different weights in different places.)
On a good day, I push down on the Earth with about 890 Newtons of force. No matter how hard I try, I can never push more or less than that.
Force is the product of mass and acceleration. The force that an average person pushes down on the earth is about 598 N.
Force:It is defined as the product of the mass and acceleration. It is measured in Newton.
[tex]F= m a[/tex]
Where,
[tex]F[/tex] - force
[tex]m[/tex] - mass = 60 kg
[tex]a[/tex]- acceleration = 9.8 m/s²
Put the values in the formula,
[tex]F= 60 \times 9.8 \\\\F = 598 \rm \ N[/tex]
Therefore, the force that an average person pushes down on the earth is about 598 N.
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A ball is dropped from a height of 20 meters. At what height does the ball have a velocity of 10 meters/second?
A.5.1 meters
B.9.8 meters
C.25 meters
D.15 meters
Answer:B
Explanation:
Initial velocity, u=0m/s
Distance,s=20m
a=+g=9.8m/s*s
Using v*v=u*u+2gs
v*v=0+2*9.8*20
v*v=392
v=19.8
When s=20m, v = 19.8m/s
Therefore when v = 10m/s, s= 10*20/19.8
s =10.1m
Answer:
I believe that its D. 15 Meters
Explanation:
GUESS WHAT??? I'LL MAKE YOU BRAINLIEST SO HURRY UP AND ANSWER THIS!!!!
A light year is a measurement of ___________.
a) time
B) distance
c) speed
D) intensity
Answer:
B. distance
Explanation:
leads to 9.4607 × 1012 km the length of how it is associate that is traveled by light for a year in an astronomical unit of distance.
♡
Answer:
B) Distance
Explanation:
Think about how a light year is used.
Here is proof that my answer is correct:
What is the magnitude of the electric field at a point 0.0055 m from a 0.0025
C charge?
[tex]E = 7.45x10^{11} N/C[/tex]
The intensity of the electric field (E) or simply electric field at a point is a vector quantity representing the electric force (F ) that acts over a charge, Q', located at that point.
[tex]E=K\frac{Q}{r^{2}}[/tex], where K is the constant of propotionality, Q a charge, and r the distance between a point and the charge.
[tex]E = 9x10^{9} \frac{Nm^{2} }{C^{2} } \frac{0.0025C}{(0.0055m)^{2}}[/tex]
[tex]E = 7.45x10^{11} N/C[/tex]
The magnitude of the electric field 0.0055 m from a 0.0025 C charge is calculated using Coulomb's law, resulting in an electric field strength of 7.45 x 10¹¹ N/C.
The magnitude of the electric field at a certain point from a point charge. The formula to calculate the electric field (E) due to a point charge (q) at a distance (r) is given by Coulomb's law, E = k x |q| / r₂, where k is Coulomb's constant (8.99 x 109 Nm₂/C₂). For a charge of 0.0025 C at a distance of 0.0055 m, the magnitude of the electric field can be calculated by substituting these values into the formula.
First, substitute the known values into the equation: E = (8.99 x 109) x (0.0025) / (0.00552).
Next, perform the calculation: E = (8.99 x 10⁹) x (0.0025) / (0.00003025), which simplifies to E = 7.45 x 10¹¹ N/C.
This is the magnitude of the electric field at 0.0055 m from a 0.0025 C charge. The electric field strength indicates the force per unit charge that a test charge would experience in the vicinity of the source charge.
Difference between boyles law, charles law, and gay-lussacs law
Answer:
All these laws give the relationship between two quantities of the gas among V (volume), p (pressure) and T (temperature), keeping the third one constant - however the two quantities change for each law
Explanation:
Calling:
p = gas pressure
V = gas volume
T = gas temperature (in Kelvin)
We have:
- Boyle's law: the pressure and the volume of a gas kept at constant temperature are inversely proportional. Mathematically,
[tex]pV=const.[/tex]
- Charles's law: the temperature and the volume of a gas kept at constant pressure are directly proportional. Mathematically,
[tex]\frac{V}{T}=const.[/tex]
- Gay Lussac's law: the temperature and the pressure of a gas kept at constant volume are directly proportional. Mathematically,
[tex]\frac{p}{T}=const.[/tex]
GUESS WHAT??? I'LL MAKE YOU BRAINLIEST!!!! PLEASE ANSWER THIS FAST!!!
Every mass is attracted to each other in the universe through ___________.
A) electrostatic force
B) the force of gravity
C) magnetic force
D) nuclear force
Answer:
B) the force of gravity
Every mass is attracted to each other in the universe through the force of gravity.
Sunny~ ☺
The ___ spectrum contains photons of all energies.
A.) electric force field
B.) EMR
C.) color
D.) visible light
Answer:
This is the electromagnetic spectrum.
Explanation:
The electromagnetic spectrum is the range of frequencies of electromagnetic radiation and their respective wavelengths and photon energies. Hope this helps have a great day!
Answer:
B. EMR (Electromagnetic Radiation)
Explanation:
The Electromagnetic Radiation Spectrum consists of photons of all energies. It contains a series of high energy gamma rays to low energy microwaves. The spectrum contains waves in increasing order of the their frequency and decreasing wavelength. In vacuum, all the EMR travel with speed of light c.
the brain is divided into 3 keys regions name them
Answer:
forebrain,midbrain, and hindbrain i think if that what your talking about? hope it helps
Explanation:
the areas are divided into Occipital lobe, Temporal lobe, Parietal lobe, Frontal lobe, cerebral cortex, cerebellum, hypothalamus, Thalamus, pituitary gland, pineal gland, amygdala, hippocampas and the midbrain.
Answer:
Forebrain, Midbrain, and Hindbrain.
Explanation:
Brain is complex structure which is work as control center of the whole body. Brain is helping in receive, send, processes and direct the sensory information. Brain is divided into three key regions with each having different functions.
Forebrain: It is known as the largest part of the brain. Optic cranial nerve and the olfactory are present on the forebrain part. Cerebrum is also the part of the forebrain which cover the 2-3rd part of the brain structure.
Midbrain: It connects the forebrain to the hindbrain. Brainstem which is formed by the composition of Midbrain and Hindbrain, helping to connect the cerebrum with spinal cord. Midbrain helping in to regulate movements and visual signals.
Hindbrain: It is composed of two subregions metencephalon and myelencephalon. It is helping in mentioning of equilibrium and balance, regulation of autonomic functions and coordination in movements.
An electric field from a charge has a magnitude of 1.5 × 104 N/C at a certain location that points inward. If another charge with a magnitude of +3.0 × 10−6 C is brought near it, what is the strength of the electrostatic force that acts on this charge and how do the two charges behave?
Answer:
-0.045 N, they will attract each other
Explanation:
The strength of the electrostatic force exerted on a charge is given by
[tex]F=qE[/tex]
where
q is the magnitude of the charge
E is the electric field magnitude
In this problem,
[tex]q=3.0\cdot 10^{-6}C[/tex]
[tex]E=-1.5\cdot 10^4 N/C[/tex] (negative because inward)
So the strength of the electrostatic force is
[tex]F=(-3.0\cdot 10^{-6}C)(1.5\cdot 10^4 N/C)=-0.045 N[/tex]
Moreover, the charge will be attracted towards the source of the electric field. In fact, the text says that the electric field points inward: this means that the source charge is negative, so the other charge (which is positive) is attracted towards it.
Answer:
The correct answer is actually -0.045; attract each other
Explanation:
two engineering appliances which uses friction
Answer: gears and brakes cause friction
The two engineering appliances which uses friction include
GearsBrakesGears experience friction despite it being lubricated as that only reduces the
wear and tear effect. Friction in gear takes place at the interface of
lubricated tooth parts which undergo rolling and sliding movements.
Brakes also experience friction when applied in which the brake pads touch
the brake discs thereby creating friction. The heat generated from the
friction helps to resists and slow down the the motion of the wheels of the
car.
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Which statements describe how a machine can help make work easier? Check all that apply.
It can put out more force than the input force by decreasing the distance through which force is applied.
It can increase the amount of work performed if the output force is in the same direction as the input force.
It can apply a force to an object in a different direction than the force applied to the machine.
It can increase the distance through which a force acts by exerting less force than was used on it.
It can exert a greater force through a greater distance than the force used on the machine.
Answer:
It can exert a greater force through a greater distance than the force used on the machine.
Explanation:
A machine is a device that makes work easier and so it should exert greater force than the force applied on it.
Answer:
she is correct
Which quantities are scalars?
Choose all that apply
A.Distance
B.speed
C. acceleration
D.Velocity
Answer:
A and B
Explanation:
Because both of them have only magnitude not direction.
Answer:
I think it's either A or B. but i'm going to say B.
Explanation:
Hope my answer has helped you if not i'm sorry.
Why does magnet 5 float above magnet 4
The change of phase from a vapor to a liquid is called _____. evaporation condensation distillation vaporization
Answer:
condensation or distillation
Explanation:
Answer: condensation
Explanation:
Discuss potential behavioral concerns for people should they travel to Mars
Answer:
The ability of our bodies to adapt to different levels of gravity. You would become weaker and your heart is use to zero gravity. Boredom because there isn't much to in space. When intelligent people get bored, it's not pretty all the time...
A rock collection comes from which part of Earth?
Answer:
rocks form from the outer solid layer of the earth which is the crust
Explanation:
Answer:
Crust
Explanation:
Rock is a solid mass, a collection of minerals which occur naturally. There are three different types of rocks- Igneous, Sedimentary and Metamorphic. These vary in texture and composition. The rocks come from the upper most layer of the Earth- the crust. Heat, pressure, volcanoes, wind and water play important role in formation of rocks.
A horizontal line on a velocity/time graph shows ____ acceleration.
Answer:
Zero (0)
Explanation:
A horizontal line will be no movement of negative of positive acceleration
Answer:
Zero acceleration
Explanation:
In a velocity-time graph, the gradient of the line describes how the acceleration varies.When the gradient is positive, it means we have a line that is upward sloping thus the accelaration is positive.When we have a negative gradient, it means the line is downward sloping thus the accelaration is negative.When the gradient is zero, there is no slope, thus the accelaration is zero, the case of a horizontal line.
The difference between a red shift and a blue shift has to do with wavelength frequency. T or F
Answer:
Its True
Explanation:
The difference between a red shift and a blue shift is as follows;
Red shift: In the red shift, light changes as the object in space (such as star or galaxies) moves away from us then the light is shifted to red end.The light is shifted to a shorter frequency. In this case, the light is shifted to a longer wavelength.
Answer:
true
Explanation:
Describe the path of the electric current through a circuit?
Answer:
current moves from positive terminal of a cell towards the negative terminal of a cell.
Explanation:
this happens when good conductors which have free electrons moving randomly within them.when a cell i s connected across the ends the free electrons moves in a given direction. then the current starts flowing in a opposite direction with electrons which moves negative terminal to positive terminal.
Final answer:
Electric current in a circuit flows through a closed conducting path enabling charge flow, defined as electric current, with components connected by conducting wires.
Explanation:
Electric current in a circuit follows a closed conducting path. In circuits, charge flows through a complete loop, with the charge flow rate defined as electric current.
An example is a simple circuit with a battery, a switch, and a load like a light bulb connected by conducting wires to provide a pathway for current flow.
When analyzing circuits, wires are treated as perfect conductors, and schematics are used to represent components with standardized symbols and solid lines for connections.
Bohr’s atomic model differed from Rutherford's because it explained that electrons exist in specified energy levels surrounding the nucleus. electrons are embedded within the rest of the atom like plum pudding. an atom is an indivisible sphere. electrons circle the nucleus.
Answer:
electrons exist in specified energy levels
Explanation:
In its gold-foil scattering with alpha particles, Rutherford proved that the plum-pudding model of the atom theorised by Thomson was wrong.
From his experiment, Rutherford inferred that the atom actually consists of a very small nucleus, where all the positive charge is concentrated, and the rest of the atom is basically empty, with the electrons (negatively charged) orbiting around the nucleus at very large distance.
However, Rutherford did not specify anything about the orbits of the electrons. Later, Bohr predicted that the electrons actually orbit the nucleus in specific orbits, each orbit corresponding to a specific energy level. Bohr's model found confirmation in the observation of the emission spectrum lines: when an electron in one of the higher energy level jumps down into an orbit with lower energy, the atom emits a photon which has an energy exactly equal to the difference in energy between the two orbits (and this energy of the photon corresponds to a precise wavelength).
Answer:
A.electrons exist in specified energy levels surrounding the nucleus.
Is correct on edge!
Explanation:
Four 5-gram blocks of metal are sitting out in the sun and absorb the same amount of heat energy. Use the following specific heat capacity data to determine which block will increase its temperature the most.
Answer:
There is NO DATA??
Explanation:
Answer:copper
Explanation: