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Tems11 [23]
3 years ago
15

A light-year is a way to measure _________ in space.

Physics
1 answer:
Alex17521 [72]3 years ago
6 0

Answer:

Distance

Explanation:

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Number the steps for balancing equations: Use coefficients to increase the atoms on each side. Check to make sure you have the s
Sav [38]

Answer:

1.Identify the atoms on each side,

2. Count the atoms on each side,

3.Use coefficients to increase the number of atoms on each side,

4.Check to make sure you have same number of each type of atom on each side

Explanation:

THEY ALL RIGHT!!!!!!!!!

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3 years ago
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A 20-ton truck collides with a 1500-lb car and causes a lot of damage to the car. Since a lot of damage is done on the car : Sel
Anni [7]

Answer:

d)

Explanation:

Newton's 3rd Law tells us that for every action we will have a reaction equal in magnitude and opposite in direction. In a collision between obects A and B this means that the force on A applied by B will be equal in magnitude than the force on B applied by A, which leaves d as the true answer and the rest as false.

8 0
3 years ago
n the railroad accident, a boxcar weighting 200 kN and traveling at 3 m/s on horizontal track slams into a stationary caboose we
USPshnik [31]

Answer:

ΔK = -6 10⁴ J

Explanation:

This is a crash problem, let's start by defining a system formed by the two trucks, so that the forces during the crash have been internal and the moment is preserved

initial instant. Before the crash

        p₀ = m v₁ + M 0

final instant. Right after the crash

        p_f = (m + M) v

        p₀ = p_f

        mv₁ = (m + M) v

        v = \frac{m}{m+M} \  v_1

     

we substitute

        v = \frac{20}{20+40}   3

        v = 1.0 m / s

having the initial and final velocities, let's find the kinetic energy

        K₀ = ½ m v₁² + 0

        K₀ = ½ 20 10³ 3²

        K₀ = 9 10⁴ J

        K_f = ½ (m + M) v²

        K_f = ½ (20 +40) 10³  1²

        K_f = 3 10⁴ J

the change in energy is

       ΔK = K_f - K₀

       ΔK = (3 - 9) 10⁴

       ΔK = -6 10⁴ J

The negative sign indicates that the energy is ranked in another type of energy

7 0
3 years ago
Which is a result of dormancy?
Nataly [62]
Dormancy<span> that is caused by an impermeable seed coat is known as physical </span>dormancy<span>.</span>
7 0
4 years ago
????????????????!?!?!??
azamat

The amount of cytoplasm I think.


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3 years ago
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