How many significant figures are in the measurement 230kg

If you hit another object with your vehicle, your _______ will be slowed or stopped by the force of impact caused by that object

BaLLatris [955]

Answer:

Speed

Explanation:

If a vehicle hit any other object then its speed will slow down or some time the vehicle will stop its depends on the force exerted by other object on the vehicle.

The change in speed of vehicle is due to momentum because momentum is always conserved. So to conserve the momentum the speed of the vehicle decreases because after hitting the overall mass is increases.

8 0

2 years ago

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A playground slide is 8.80 ft long and makes an angle of 25.0° with the horizontal. A 63.0-kg child, initially at the top, slide

mario62 [17]

Answer:

initial: 1654.6 J, final: 0 J, change: -1654.6 J

Explanation:

The length of the slide is

L = 8.80 ft = 2.68 m

So the height of the child when he is at the top of the slide is (with respect to the ground)

$h = L sin \theta = (2.68 m)sin 25.0^{\circ}=1.13 m$

The potential energy of the child at the top is given by:

$U = mgh$

where

m = 63.0 kg is the mass of the child

g = 9.8 m/s^2 is the acceleration due to gravity

h = 1.13 m

Substituting,

$U=(63.0 kg)(9.8 m/s^2)(2.68 m)=1654.6 J$

At the bottom instead, the height is zero:

h = 0

So the potential energy is also zero: U = 0 J.

This means that the change in potential energy as the child slides down is

$\Delta U = 0 J - (1654.6 J) = -1654.6 J$

7 0

2 years ago

Carbon-14 is a naturally-occuring, stable isotope that is commonly used is scientific studies as a tracer and to date artifacts.

lina2011 [118]

The answer is that there are 6 electrons, 8 neutrons, and 6 protons in carbon 14. The answer is then, B.

3 0

3 years ago

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Does a falling rock have potential or kinetic energy

Neko [114]

depends t what stage in the fall it is. If it is at the peak, it is fully potential. If it is in the middle, it has both. If it is at the bottom of the fall, it is completely kinetic

3 0

2 years ago

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On a typical clear day, the atmospheric electric field points downward and has a magnitude of approximately 103 N/C. Compare the

Nina [5.8K]

Answer:

a) FE = 0.764FG

b) a = 2.30 m/s^2

Explanation:

a) To compare the gravitational and electric force over the particle you calculate the following ratio:

$\frac{F_E}{F_G}=\frac{qE}{mg}$ (1)