What does Ohm’s law state?
A. Current equal voltage time resistance
B. Voltage equals resistance divided by current
C. Voltage equals current divided by resistance
D. Voltage equals current time resistance

Answer: I think the answer is option D.

Explanation:

Momentum = mass × velocity

p = mv

p = (120 kg) (30 m/s)

p = 3600 kg m/s

Given:

velocity, v = 30m/s

mass, m = 120kg

Therefore, momentum

p = mv

p = 120kg * 30m/s

p = 3600 kgm/s = [tex]3.6 * 10^3 kgms^{-1}[/tex]

A property of a moving body that the body has by virtue of its mass and motion and that is equal to the product of the body's mass and velocity broadly.

Momentum is a vector quantity, it has both magnitude and direction. Since momentum has a direction, it can be used to predict the resulting direction and speed of motion of objects after they collide.

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Answer:

5 mph East.

Explanation:

If the girl is the frame of reference, we need to check the train's relative movement to the girl.

If the girl was not moving inside the train, the speed of the train would be zero, because the train and the girl would be moving together with the same speed and direction.

If the girl is moving 5 mph toward the back of the train, the movement of the train should be calculated considering the girl is fixed (not moving).

So the direction of the train movement would be the inverse of the girls movement (the girl is going West), then the speed and direction of the train is 5 mph and East.

Answer:

The momentum of the bowling ball is 53.4 kg-m/s.

Explanation:

We have,

Mass of a bowling ball is 8.9 kg

Speed of the ball is 6 m/s

It is required to find the momentum of the ball. The momentum of an object is given in terms of its mass and speed as :

p = mv

[tex]p=8.9\times 6\\\\p=53.4\ kg-m/s[/tex]

So, the momentum of the bowling ball is 53.4 kg-m/s.

Answer:

D

Explanation:

Acceleration has both magnitude and direction. because velocity is vector quantity

average velocity is vector

linear momentum = mass× velocity

therefore it's also vector

force = mass× acceleration

acceleration is vector therefore force also vector

potential energy= mgh

energy in any form is scaler quantity therefore potential energy too is a scaler quantity.

Answer: B

Degree

Explanation:

The direction of vectors are always measured in angles starting from the north. That is, in an anticlockwise direction. But the unit of angle is degree. Therefore, the direction of a vector that points somewhere between due north and due east is measured in degree.

Answer:degrees

Explanation:

Answer:

53 kg m/s

Explanation:

Momentum = mass × velocity

p = mv

p = (8.9 kg) (6.0 m/s)

p = 53.4 kg m/s

Rounded to 2 significant figures, the momentum is 53 kg m/s.

Answer:

the answer from nod energy from atoms

Answer:

this situation would not be physically possible

Answer:

Acceleration can be defined as the rate at which velocity increases per second.

Assuming that the acceleration unit is

m/s^2

Answer: Energy consumption and sustainability is important so that it remain available for future generation.

Explanation:

1. The home furnaces are likely to require fuel like coal, which will directly emit carbon dioxide and carbon monoxide gases. These should be replaced with the electrical furnaces. The old or more power consuming air conditioners should be replaced with new ones.

2. The water heaters should be tankless so their capacity to heat more water could be possible. The water heaters should be electricity saving.

3. Washer and dryers should be water savy and electricity savy. A front-loading washing machine is useful energy saver.

4. The LED lights are more electricity saving than conventional bulbs. Halogen lights are also electricity saving.

Answer: the answer is D

Explanation:

Answer:

The question is incomplete because the options are not given. We'll solve this question with the options.

There are two properties of negative charges which we have to consider to find the figure of its electrical field.

Firstly, for a negative charge, the electrical field lines are always directed radially outwards and they don't intersect.

Secondly, we know that similar charges repel each other, so there will be no electrical field present directly between these two negative charges. Electrical field line will be present between two charges only when there is a force of attraction.

Taking both of these facts into consideration, the electrical field line between two negatives is represented by the figure below.

Answer:

Figure C

Explanation:

Got it correct on Edmentum

Answer:

The amount of work will decrease because force is directly proportional to work

while distance will increase since it is inversely proportional to force.

Answer:c

Explanation:The amount of work will go down because the distance will increase.

Answer:

I think it's D. open series circuit .

Explanation:

hope it helps you!

Answer:

the object has decreasing acceleration and increasing velocity

Answer: the answer is C

Explanation:

Answer:

Displacement is the distance and direction an object is moved. Force and work are directly proportional to each other, while force and displacement are indirectly propotional. The equation showing the relationship is W= Fd. OR Work is a scalar. The rate at which work is done or at which energy is transferred. Work is equal to the force parallel to the displacement.

Explanation:

Work is related to force and displacement as the work is the product of the displacement and the force.

The total amount of energy transferred when a force is applied to move an object through some distance

The work done is the multiplication of applied force with displacement.

The SI  unit of work done by an object is Joules.

IJ is the work done when a force of 1 N displaces an object by 1 m .

work is the product of displacement and force.

Work Done = Force * Displacement

For example, let us suppose a force of 100 N is used to displace an object by a displacement of 50 m then the work done on the object can be calculated by the above-mentioned formula

work done = 100 N ×50 m

                  =5000 N m

Thus, we can say the work done on an object depend on the force as well as the displacement, as the work is the product of the force and the displacement

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Answer:

11.) g = 3.695 m/s^2

12.) g = 8.879 m/s^2

13.) E = 8127 N/C

Explanation:

11.) Given that the

Mercury mass M = 3.3 × 10^23kg

Radius r = 2.44 ×10^6 m

Gravitational constant G = 6.67408 × 10^-11 m3kg-1 s^-2

Gravitational field strength g can be calculated by using the formula below

g = GM/r^2

Substitutes all the parameters into the formula

g = (6.67408 × 10^-11 × 3.3 × 10^23)/(2.44×10^6)^2

g = 2.2×10^13/5.954×10^12

g = 3.695 m/s^2

12.) Given that the

Venus mass M = 4.87×10^24kg

Radius r = 6.05 × 10^6 m

Using the same formula for gravitational field strength g

g = GM/R2

Substitute all the parameters into the formula

g = (6.67408 × 10^-11 × 4.87×10^24)/(6.05×10^6)^2

g = 3.25×10^14/3.66×10^13

g = 8.879 m/s^2

13.) Given that the

Charge = 2.26 nC = 2.26×10^-9

Distance d = 0.05m

Electric field strength E can be calculated by using the formula below

E = Kq/d^2

Where

K = electrostatic constant 8.99 × 10^9 Nm2/C2

Substitutes all the parameters into the formula

E = (8.99 × 10^9 × 2.26×10^-9)/0.05^2

E = 20.3174/2.5×10^-3

E = 8126.96 N/C

Answer:

If pushing forward speeds it and pushing backward slows it down then force perpendicular to the object will keep it stationary and resist it's motion

Explanation:

Hope my efforts make impact in your life

Answer:

About 2.19 seconds

Explanation:

[tex]d=v_ot+\dfrac{1}{2}at^2[/tex]

Since the ball is dropped from rest, there is no initial velocity, and you can write the following equation:

[tex]23.5=\dfrac{1}{2}(9.8)t^2 \\\\t^2\approx 4.79 \\\\t\approx 2.19s[/tex]

Hope this helps!

Answer: In a position-time graph, the velocity of the moving object is represented by the slope, or steepness, of the graph line. If the graph line is horizontal, like the line after time = 5 seconds in Graph 2 in the Figure below, then the slope is zero and so is the velocity. The position of the object is not changing

Answer:

a) transferring energy

Explanation:

A linkage is an assembly of parts connected together to control forces and movement. The connections between links are called joints and are used for ensuring movement, pure rotation or sliding.

Linkages provides a means in which kinetic energy is being transferred in different directions within a system. This Linkages can be used to Change force  direction, size of force applied or the motion created by the force.

Answer:

The acceleration of the car is [tex]3.7\ m/s^2[/tex].

Explanation:

It is given that,

Initial speed of the car, u = 0

Final speed of the car, v = 60 km/h = 16.66 m/s

Time, t = 4.5 s

We need to find the acceleration of the car. It is equal to the change in velocity divided by time taken. It can be given by :

[tex]a=\dfrac{v-u}{t}\\\\a=\dfrac{16.66-0}{4.5}\\\\a=3.7\ m/s^2[/tex]

So, the acceleration of the car is [tex]3.7\ m/s^2[/tex]. Hence, this is the required solution.