Answer:
net force
Explanation:
The net force is the vector sum of all the forces that act upon an object. That is to say, the net force is the sum of all the forces, taking into account the fact that a force is a vector and two forces of equal magnitude and opposite direction will cancel each other out.
What relationship between the gravitational force and distance is shown in the graph above?
Answer:
The less distance between the objects, the more force there is between them.
Relationship between the gravitational force and distance shown in the graph is
>increases, decreases.
What is the relationship between force of gravity and distance?As most gravitons exist in a cloud around any object so when distance from the object increases, the density of the graviton cloud goes decreases. There is less gravitational attraction due to this.
The relationship between the force of gravity and distance between the objects is explained by inverse square law. This implies that the force of gravity between objects is inversely proportional to the square of the distance.
Any influence that causes an object to undergo a change is called force. Distance implies how far an object travels over a period of time. When the force applied is greater on an object, it will travel more distance.
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Which statements describe the Mercalli scale? Check all that apply.
Which statements describe the Mercalli scale? Check all that apply.
A. This scale measures seismic waves based on their size.
B. This scale rates an earthquake according to how much damage it causes.
C.This scale produces a single rating for earthquakes that reach the surface.
D. This scale uses Roman numerals to rank the damage caused by an earthquake.
E.This scale measures the magnitude of an earthquake based on the size of seismic waves.
Answer:The Mercalli scale : This scale rates an earthquake according to how much damage it causes and This scale uses Roman numerals to rank the damage caused by an earthquake.
Explanation:The Modified Mercalli scale is intended to illustrate the consequences of an earthquake, at a contracted station, on tangible characteristics, on modern fittings and human beings.
The Modified Mercalli Intensity value ascribed to a particular site subsequent an earthquake has an extra significant means of severity to the nonscientist than the magnitude because intensity assigns to the outcomes really encountered at that position. This scale is comprised of 12 growing levels of intensity, denoted by Roman numerals, arranging from gradual shaking to catastrophic impairment.
8. If the speed of a wave is 1500 m/s and its frequency is 200 Hz, what is the wavelength?
formula for wavelength = speed/frequency
So 1500/200 = 7.5 meters
The wavelength of the wave is 7.5m.
What is Wavelength?The wavelength of light is described as "the distance between two consecutive peaks or troughs of a light wave" which is denoted by the Greek letter lambda (λ). Therefore, the distance between one crest or trough of one wave and the next wave is known as wavelength.
Wavelength can be expressed as:
[tex]\lambda=\frac{v}{f}\\\lambda = wavelength\\{v} = velocity\\{f} = frequency[/tex]
λ represents wavelength which is expressed in meters. The v is wave velocity that is calculated as meters per second (mps) and the f stands for frequency, which is measured in hertz (Hz).
For above given information,
speed of a wave is 1500 m/s
frequency is 200 Hz
So, wavelength= 1500/200= 7.5m
Thus, the wavelength of the wave is 7.5m.
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Find the momentum of a train with a mass of 850 kg and forward velocity of 15 m/s
Answer:
12,750
Explanation:
P = mv
Momentum = Mass x Velocity
Plug it in and finish equation
Answer:
P=12,750kgm/s
Explanation:
Momentum (P) = mass x velocity
Where velocity =15m/s
Mass=850kg
Therefore, momentum(P) = (850kg) x (15m/s)=12,750kgm/s
Hence,the momentum of the train is 12,750kgm/s
QUESTION 2
Sally and Bill are on identical swings. (Fill in "Sally", "Bill", or "Neither" into the fields)
Assume they weigh the same: If Sally is pushed harder than Bill,
________ would come back sooner, _______
has a greater amplitude.
Assume Bill is heavier than Sally: If both are pushed equally hard,
_______would come back sooner,______
has a greater amplitude
Assume they weigh the same: If Sally is pushed harder than Bill, Bill would come back sooner, Bill has a greater amplitude. Assume Bill is heavier than Sally: If both are pushed equally hard, Bill would come back sooner, Sally has a greater amplitude
Explanation:
The amplitude of a wave refers to the maximum amount of displacement of a particle on the medium from its rest position. In a sense, the amplitude is the distance from rest to crest. Similarly, the amplitude can be measured from the rest position to the trough position.
In simpler terms, amplitude stands for the maximum extent of a vibration or oscillation, measured from the position of equilibrium. Amplitude is proportional to the energy of a wave, a high energy wave having a high amplitude and a low energy wave having a low amplitude.
How much heat is needed to change 1.25 kg of steak at 100°C to water at 100°C?
The heat required to change 1.25 kg of steak is 2825 kJ /kg.
Explanation:
Given, mass m = 1.25 kg, Temperature t = 100 degree celsius
To calculate the heat required,
Q = m [tex]\times[/tex] L
where m represents the mass in kg,
L represents the heat of vaporization.
When a material in the liquid state is given energy, it changes its phase from liquid to vapor and the energy absorbed in this process is called heat of the vaporization. The heat of vaporization of the water is about 2260 kJ/kg.
Q = 1.25 [tex]\times[/tex] 2260
Q = 2825 kJ /kg.
The kinetic energy of a ball with the mass of 0.5 kg and a velocity of 10 m/s is what
Answer:
25J
Explanation:
Kinetic energy = 1/2 mv²
Mass = m= 0.5kg
Velocity = v = 10m/s
K. E = 1/2 x 0.5 x 10 x 10
K. E = 0.5 x 5 x 10
K. E = 2.5 x 10
K. E = 25 J
The S. I unit of energy is joules with symbol J
I hope this was helpful, Please mark as brainliest
Answer:
A.) 25j
Explanation:
k= 1/2mv^2
the presence of which magnetic feature best explains why a magnet can act a distance on other magnets or on objects containing certain metals
Answer:
Fields
Explanation:
The presence of a magnet's magnetic field best explains why a magnet can act at a distance on other magnets or objects containing certain metals. The magnetic field is an invisible force field that extends from the magnet, wherein other magnets or certain metals are influenced.
Explanation:The feature of a magnet that allows it to act at a distance on other magnets or on objects containing certain metals is its magnetic field. A magnet's magnetic field is an invisible force field that extends out from the magnet in a pattern similar to the pattern formed by evenly spaced, radiating lines. Within the magnetic field, other magnets or certain metals are pushed or pulled by the magnetic force. For example, if you slowly bring a piece of iron closer to a magnet, you will feel the iron being attracted towards the magnet even before it physically touches the magnet. That's the magnetic field in action.
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How can you best identify quackery in a health service provider?
A. The provider does not provide success claims or testimonials.
B. The provider has only one doctor on staff.
O
C. The provider's success claims seem too good to be true.
O
D. The provider is not well known.
SUBMIT
Answer:
C. The provider's success claims seem too good to be true.
Which of the following shows the figure rotated 90 degrees counterclockwise around the origin and then reflected across the x axis?
Answer:
A
Explanation:
Transformation rule : The coordinates change by the rule when the figure rotate 90 degrees about the origin is given by
[tex](x,y)(-y,x)[/tex]
Transformation rule: When the figure reflected across x- axis then the coordinates change by the rule
[tex](x,y)(x,-y)[/tex]
The given figure cut x - axis at x=3
The coordinates (3,0).
After 90 degrees rotation about origin the coordinates becomes (0,3).
After reflection across x- axis , the coordinates becomes (0,-3).
Only in first figure, there is (0,-3) .
Hence, the option A is true.
The amount of carbon dioxide released into the atmosphere is balanced by the release of:
A)nitrogen
B)carbon
C)oxygen
D)phosphorous
PLZZZZ hurry
Answer:
carbon
Explanation:
Atoms with electronegativity differences below 0.4 generally form covalent
bonds. True or False
Final answer:
The statement is true; atoms with electronegativity differences below 0.4 typically form covalent bonds, with a bond being considered nonpolar covalent when the electronegativity difference is less than 0.4.
Explanation:
The statement that atoms with electronegativity differences below 0.4 generally form covalent bonds is true. In chemistry, the electronegativity difference between bonding atoms is a determinant of the type of bond they will form. If the difference in electronegativities is less than about 0.4, the bond is typically considered nonpolar covalent, where the bonding electrons are shared equally between the two atoms, and the distribution of electrical charge is balanced. When the electronegativity difference is between 0.4 and about 1.7, the bond is classified as polar covalent, meaning electrons are not shared equally, leading to a partial charge distribution within the molecule.
An electronegativity difference of zero indicates an absolute nonpolar covalent bond, while significantly higher differences (usually greater than about 1.8) suggest the bond will be ionic in character, where electrons are transferred from one atom to another, resulting in the formation of ions.
Earth is surrounded by a magnetic field because of
Earth is surrounded by a magnetic field because of the rotating electric currents by the charged metallic particles in the earth crest.
What is earth's magnetic field ?On earth, electric currents are produced by the movement of liquid metal in the planet's outer core. These electric currents combine to create a magnetic field that surrounds the globe as a result of Earth rotating on its axis.
The magnetic field is crucial to keeping life on Earth alive. Without it, we would be exposed to a lot of solar radiation and our atmosphere would be unrestricted in its ability to escape into space.
A stream of charged particles emerging from the sun, interacts with the magnetic field that stretches from the interior of the earth into space. Electric currents caused by the movement of convection currents of a combination of molten iron and nickel in the earth's outer core produce the magnetic field.
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Which of the following is a property of all periodic waves?
A. They follow a repeating pattern as they propagate.
B. They oscillate in a direction perpendicular to the direction in which they propagate.
C. They tend to propagate in a circle.
D. They always return to the same place.
Answer: Option A. They follow a repeating pattern as they propagate
Explanation:
Why is it easy to get one empty cart moving but difficult to get a line of 20 empty carts moving?
Answer:
It is easier to move empty cart than of moving 20 empty carts because of surface that can affect balancing the carts in same array which makes the carts of array to move in different directions.
Final answer:
It's easier to get one empty cart moving than 20 because a single cart has less inertia and friction to overcome compared to the combined inertia and friction of 20 carts.
Explanation:
The question you've asked pertains to the subject of physics, specifically the principles of inertia and momentum. Inertia is the tendency of an object to resist changes to its state of motion. When you have one empty cart, the inertia is relatively low compared to a line of 20 empty carts. Therefore, it requires less force to get one cart moving than 20 carts because the combined inertia of all the carts is greater, hence more force is needed to overcome it.
In addition to inertia, frictional forces also play a part. Each cart adds its own frictional resistance to the total system. Thus, when you try to push 20 carts, you're trying to overcome the frictional force of 20 sets of wheels on the surface as opposed to just one. This makes it substantially more difficult to get the line of carts moving compared to just one cart.
A train traveling at 27.5 m/s accelerates to 42.4 m/s over 75.0 s. What is the displacement of the train in this time period
Answer:
2621.25 meters
Explanation:
First, write down what we are given.
Initial velocity = 27.5 m/s
Final velocity = 42.4 m/s
Time = 75 seconds
We need to look at the kinematic equations and determine which one will be best. In this case, we need an equation with distance. I am going to use [tex]v_{f}^{2} = v_{i}^{2} +2ad[/tex], but you can also use the other equation, [tex]x = v_{o}t+\frac{1}{2}at^{2}[/tex]
We need to find acceleration. To find it, we need to use the formula for acceleration: [tex]a = \frac{v_{f}-v_{i}}{t}[/tex]. Plugging in values, [tex]a = \frac{42.4-27.5}{75} = .199\ m/s^{2}[/tex]
Next, plug in what we know into the kinematics equation and solve for distance. [tex]42.4^{2} = 27.5^{2} + 2(.199)(d)\\d = 2621.25\ meters[/tex]
What is the gravitational force between two objects, one with a mass 2.0×10^4 kg and the second with a mass of 3.0×10^4 kg, that are 1.5 M apart?(G=6.673
Answer: A. 1.77x10-² N
Explanation: Newton's Law of Universal gravitation is expressed in the following formula:
F= G x ( m1 x m2 ) / r²
= 6.673x10-¹¹ N.m²/kg² ( 2.0x10⁴ kg x 3.0x10⁴ kg) / (1.5m )²
= 0.0177 N or 1.77x10-² N
Can you think of a device or machine that transfers the motion of a hot gas to motion of an object?
Answer:
Turbines in coal factories
Explanation:
Turbines in coal factories use steam power to move the turbine flaps and generate static electricity as energy output.
Explanation:
a machine or a device that transfers the motion of a hot gas to motion of an object is a rocket ship.
A baseball travels a distance of 20 meter at a speed of 25m/s. How much time did it take?
The baseball takes 0.8 s to travel a distance of 20 m at a speed of 25 m/s.
Explanation:
It is known that speed is the rate at which any object covers a particular distance.
So [tex]speed =\frac{\text { distance }}{\text { time }}[/tex]
Hence, it is known that speed is directly proportional to distance covered and inversely proportionate to the time taken to cover this distance.
Similarly, the time taken by any object to cover a distance is directly proportionate to the distance and inversely proportionate to the velocity of the object.
As the distance is given as 20 m and speed is given as 25 m/s, then the time can be easily obtained by finding the ratio of distance to speed.
Here,
[tex]\text { Time }=\frac{\text {distance}}{\text {speed}}=\frac{20}{25}=0.8 \mathrm{s}[/tex]
Thus, the baseball takes 0.8 s to travel a distance of 20 m at a speed of 25 m/s.
A clear echo is heard within 0.2 seconds when a person shouts by sitting at the ridge of a hill. Calculate the velocity of sound in air. The distance between the person and the hill is 33.2 m
To calculate the velocity of sound in air using the given information, we'll use the formula:
Speed=(distance)/(Time).Therefore, the velocity of sound in air is 332m/s.
To calculate the velocity of sound in air using the given information, we'll use the formula:
Speed=(distance)/(Time)
Given:
Time taken for the echo(t) = 0.2 seconds
Distance between the person and the hill(d) = 33.2 meters
Firstly, recognize that the sound traveled twice the distance (to the hill and back) to create the echo.
So, the actual distance the sound traveled is 2×distance=2×33.2meters=66.4meters.
Next, use the formula for speed:
Speed=(distance)/(Time)
Speed=(66.4m)/(0.2s)
Speed=332m/s
Therefore, the velocity of sound in air is 332m/s.
How long will take your trip in hours if you travel 350km at an average speed of 80km/hr?
Answer:
4. hours to travel 350km going at a rate of 80km/hr.
Explanation:
Well first you must divide 350/80=4.375~4.
Answer: 4.375 hours
Explanation:
350 divided by 80 = 4.375
-A: Find the force that must be exerted on the rod to maintain a constant current of 0.156 A in the resistor? (In mN)
-B: What is the rate of the energy dissipation in the resistor? (In W)
-C: What is the mechanical power delivered to the rod? (In W)
A) Force: 0.0528 N
B) Power dissipated: 0.307 W
C) Power delivered: 0.307 W
Explanation:
A)
The force experienced by a current-carrying wire in a magnetic field is given by
[tex]F=ILB[/tex]
where
I is the current in the wire
L is the length of the wire
B is the strength of the magnetic field
In this problem, we have:
L = 0.451 m
B = 0.751 T
I = 0.156 A
Therefore, the force is
[tex]F=(0.156)(0.451)(0.751)=0.0528 N[/tex]
B)
The rate of energy dissipation in the resistor is the power dissipated in the resistor, and it is given by
[tex]P=I^2R[/tex]
where
I is the current in the resistor
R is the resistance
For the wire in this problem,
I = 0.156 A
[tex]R=12.6\Omega[/tex]
Therefore, the power dissipated is
[tex]P=(0.156)^2(12.6)=0.307 W[/tex]
C)
The mechanical power delivered to the rod is given by
[tex]P=VI[/tex]
where
V is the potential difference across the rod
I is the current in the rod
The potential difference across the rod must be equal to the potential difference across the resistance, which can be found by using Ohm's law:
[tex]V=RI=(12.6 \Omega)(0.156 A)=1.97 V[/tex]
Therefore, the power delivered to the rod is
[tex]P=(1.97 V)(0.156 A)=0.307 W[/tex]
This power is equal to the power dissipated on the resistor: this is due to the law of conservation of energy, in fact the total energy must remain constant, so here the electric energy is transformed into mechanical energy of motion of the rod.
What is the final velocity of an object that is dropped if it falls a distance of 100 m?
Answer:
[tex]44.27m/s[/tex]
Explanation:
The kinematic equation
[tex]v_f^2=v_0^2+2ad[/tex]
gives the final velocity [tex]v_f[/tex] of the object given the initial velocity [tex]v_0[/tex], the acceleration [tex]a[/tex], and the distance traveled [tex]d[/tex].
For our case, the object is dropped; therefore,
[tex]v_0=0[/tex]
I.e. the initial velocity is zero. The acceleration due to gravity is
[tex]a=9.8m/s^2[/tex],
and the distance traveled is [tex]d=100m[/tex].
Putting the values into the equation we get:
[tex]v_f^2=0+2(9.8ms^{-2})(100m)\\\\v_f^2=1960\\\\v_f=\sqrt{1960} \\\\\boxed{v_f=44.27m/s}[/tex]
The final velocity of the object is 44.27 m/s.
Which particle is a form of antimatter?
A. hydrogen-1
B. photon
C. positron
D. neutrino
Answer:
C. positron
Explanation:
Antimatter particles bind with each other to form antimatter, just as ordinary particles bind to form normal matter. For example, a positron (the antiparticle of the electron) and an antiproton (the antiparticle of the proton) can form an antihydrogen atom.
There you go.
Answer:C. positron
Explanation:
An object has 16N of force being applied to the right, 16N of force being applied to the left, and 4N of force being applied downward. What is the net force on the object?
Answer: 4N downward
Explanation: If 16N is applied on both the right and left then the object isn't moving either way, so we are left with 4N.
"The net force on the object is 4N downward.
To find the net force acting on the object, we need to consider the vector sum of all the individual forces. Forces acting in opposite directions (to the right and to the left in this case) will cancel each other out.
Given the forces:
- 16N to the right
- 16N to the left
- 4N downward
Since the forces to the right and to the left are equal in magnitude (16N), they will cancel each other out. This leaves us with only the downward force to consider for the net force.
Therefore, the net force [tex]\( F_{net} \)[/tex]is simply the downward force:
[tex]\[ F_{net} = 4N \text{ (downward)} \][/tex]
The horizontal components of the force (to the right and to the left) have no net effect on the object's motion because they are equal and opposite, so they sum to zero in the horizontal direction. The only unbalanced force is the 4N acting vertically downward. Hence, the net force on the object is 4N downward."
A sprinter accelerates from rest to 10.0 m/s in 1.35 s l. What is her acceleration?
Answer:
7.4
Explanation:
2. Suppose one of your classmates says “The net force on an airplane is zero, therefore
must be on the ground and at rest." Is this a correct statement! Why or why not?
This is a false statement. Newton's first law says that if the net force on an object is zero, the object stays in UNIFORM MOTION. That means it keeps moving at a constant speed, in a straight line. It can certainly have some speed, in some direction, but without any net force, they CAN'T CHANGE.
In this section of a circuit, a current of 5.0 A flows across R1. Find the potential difference between point a and point b. Let R1 = 3.0 ohm, R2 = 8.0 ohm, and R3 = 10.0 ohm.
B) 37 V
The potential difference between point a and point b is equal to 37 V
Explanation:
The potential difference across a and b can be calculated by finding the equivalent resistance of the resistors R1, R2 and R3 and then by applying Ohm's law.
Given:
R1 = 3.0 Ω
R2 = 8.0 Ω
R3 = 10.0
Current = I = 5 A
To calculate equivalent resistance of the circuit:
R2 and R3 are connected in parallel configuration. The equivalent resistance of R2 and R3 can be calculated as
[tex]\frac{1}{R_p} =\frac{1}{R_2} + \frac{1}{R_3} \\\\\frac{1}{R_p}=\frac{1}{8} + \frac{1}{10}= \frac{5+4}{40} = \frac{9}{40} \\\\ \frac{1}{R_p}=\frac{9}{40} \\\\R_p=\frac{40}{9}\ ohms[/tex]
Resistance R1 is in series with Rp. The equivalent series resistance is calculated as
[tex]R_s = R1+R_p = 3+\frac{40}{9}= \frac{27+40}{9} = \frac{67}{9} = 7.44\ ohms[/tex]
Thus the given 3 resistor circuit can be written as an equivalent resistance Rs equal to 7.44 Ω through which current I passes.
By Ohm's law;
If V is the potential difference between a and b
Potential difference across points a and b = Current flowing through the circuit × Resistance between points a and b
[tex]V = I\times R_s = 5\times 7.44 = 37.2\ V[/tex]
37.2 V ≈ 37 V
Therefore, the potential difference between point a and point b is equal to 37 V
Answer:
Explanation:
37V
Matter with a density that is less than water will____ when placed in a container of water?
Answer:
float
Explanation:
a less dense material will float when placed in a material that is more dense than itself. The reverse is also true, that a denser material will sink when placed into into a less dense material.
What is anaerobic exercise?
Answer:
A Brief burst of intense exercise
Explanation:
Apex