I believe the answer is <u>C</u>
I hope this helps! Have a nice day, make sure to take care of yourself. You're loved <3
Answer:
b. -1.5 m/s²
Explanation:
Given the following data;
Initial velocity = 15m/s
Time = 10 seconds.
Since the car came to rest, final velocity = 0m/s
To find acceleration;
In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.
This simply means that, acceleration is given by the subtraction of final speed from the initial speed all over time.
Mathematically, acceleration is given by the equation;


Where,
a is acceleration measured in 
v and u is initial and final speed respectively, measured in 
t is time measured in seconds.
Substituting into the equation, we have;


Acceleration = -1.5 m/s²
Answer:
a) The speed of the block immediately after the collision is
.
b) The impulse exerted on the block is
.
Explanation:
Hi
a) As this is a perfectly elastic collision, we can use the formula
, due
, we obtain
. Then with the data that we know
and
, therefore
or
adding uncertainty.
b) Now that we know the speed we can use 
The Ampere (A). You could literally google to be more efficient, all the same to me tho
Answer:
Explanation:
The different types of radiation are defined by the the amount of energy found in the photons. Radio waves have photons with low energies, microwave photons have a little more energy than radio waves, infrared photons have still more, then visible, ultraviolet, X-rays, and, the most energetic of all, gamma-rays