Answer:
(C) Contact
Explanation:
Radiation Poisoning is a horrific disease that is transmitted in many ways. After a nuclear accident radiation is released into the atmosphere becoming airborne and affecting everyone that breathes it in. It is also transmitted in droplets from acid rainfall. Once the gamma radiation penetrates the body of a person it can contaminate other people by having skin to skin contact with the person that is contaminated. Therefore it can be prevented by having precaution of direct contact with anyone contaminated.
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Answer:
110.25 J
Explanation:
We are given that
Mass,M=2.5 kg
Radius,R=0.5 m
Distance,d=4.5 m
Initial speed,u=0
We have to find the total kinetic energy
According to law of conservation of energy
Total kinetic energy=Potential energy=mgh
Where g=
Using the formula
Total kinetic energy=
Total kinetic energy
Answer: positive
Explanation: because opposites attract and north=positive and south=negative the answer should be positive.
Not really as acceleration is rate of change of velocity therefore zero acceleration would Mean that the velocity is constant
OPTIONS :
A.) the force that the ball exerts on the wall
B.) the frictional force between the wall and the ball
C.) the acceleration of the ball as it approaches the wall
D.) the normal force that the wall exerts on the ball
Answer: D.) the normal force that the wall exerts on the ball
Explanation: The normal force acting on an object can be explained as a force experienced by an object when it comes in contact with a flat surface. The normal force acts perpendicular to the surface of contact.
In the scenario described above, Erica's tennis ball experiences an opposite reaction after hitting the wall.This is in relation to Newton's 3rd law of motion, which states that, For every action, there is an equal and opposite reaction.
The reaction force in this case is the normal force exerted on the ball by the wall perpendicular to the surface of contact.
