Answer:
average would be all your speeds divided by certain amounts of time and divided by the amounts of time you divided it into ///////// constant speed is is no going any faster or slower no acceleration.
Explanation:
constant speed means that there is no acceleration. For example a car moving at 50 mph is going at a constant speed, but a car that is standing still on the road and speeds up to 50 pmh is in a constant state of acceleration. Once the car reaches 50 mph there is zero acceleration and you are moving at a constant speed. Constant speed
The average speed of an object is the total distance traveled by the object divided by the elapsed time to cover that distance. It's a scalar quantity which means it is defined only by magnitude. A related concept, average velocity, is a vector quantity. Average speed
Answer: Nuclear energy is energy in the nucleus (core) of an atom.
Explanation: Atoms are tiny particles that make up every object in the universe. ... In nuclear fission, atoms are split apart to form smaller atoms, releasing energy. Nuclear power plants use nuclear fission to produce electricity.
The probability that a randomly selected student either does sports or works is 0.25.
<h3>What is probability?</h3>
The chance of happening an event out of all the possible outcomes is called the probability of an event.
The two-way table describes student's after school activities.
The probability of sport or work is represented as
P(sports U work) = number of students in sports or drama / total number of students
Substitute the values, we get
P (sports U work) = 7+13+5/(20+20+25+7+13+5+3+2+5)
P (sports U work) = 25/100
P (sports U work) =0.25
Therefore, the probability that a randomly selected student either does sports or works is 0.25.
Learn more about probability.
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What is the voltage drop across R4 in the diagram shown above?
A. 30b
B.70v
C.80v
D.10v
The answer is B. 70V
Solution
In this question we have given
mass of bowling ball=8kg
Velocity of bowling ball= 7m/s
mass of pain=2kg
velocity of pain=12m/s
In this case, law of conservation of momentum will be applied. According to law of conservation of momentum,
initial momentum of system= final momentum of the system
Total initial momentum of the system =mass of bowling ball* Velocity of bowling ball
=8 kg x 7 m/s
= 56 kg m/s.
momentum of the pain after getting hit is =mass of pain* velocity of pain
=2kg*12m/s
=24 kg m/s.
So the momentum of the bowling ball after hitting the pain= 56 kg m/s - 24 kg m/s
= 32 kg m/s
velocity of the bowling ball after hitting the pain = momentum of the bowling ball after hitting the pain/mass of bowling ball
=32 kg m/s / 8 kg
= 4 m/s
Therfore, velocity of the bowling ball after hitting the pain is 4m/s