b. False
The statement ‘An electromagnet is a strong magnet that can be turned on and off’ is true. The answer is letter A. An electromagnet can be made through wrapping the wire that has an electric current around a nail. It can be increase through the number of loops wrapped around the metal.
Answer:
true
Explanation:
The kinetic energy of a moving body can be determined from its mass and velocity of the body. The kinetic energy of 1.0-kg billiard ball that moves at 5.0 m/s is 12.5 J. Hence, option D is correct.
Kinetic energy is a form of energy generated in body by virtue of its motion. It is directly proportional to the mass and square of velocity of the body. The equation of kinetic energy is written as follows:
KE = 1/2 mv²
When a body starts moving its kinetic starts to increase while the potential energy drops out. However the total mechanical energy in the system will be conserved.
The mass of the billiard ball is given 1 kg and the velocity is 5 m/s. Then the kinetic energy of the ball is calculated as follows:
KE = 1/2 1 kg × ( 5 m/s )².
= 1/2 × 25
= 12.5 J.
Therefore, the kinetic energy of 1.0-kg billiard ball that moves at 5.0 m/s is 12.5 J. Hence, option D is correct.
To find more about kinetic energy, refer the link below:
#SPJ5
Answer:
207°
Explanation:
You start at the positive x axis and move counter clockwise. So half a circle is 180° + 27° = 207°
Answer:
A. Tell friends, and commit a day to start quitting.
Explanation:
Additional support from close friends and family is one of the easiest and most efficient ways of reducing, then quitting tobacco / nicotine addictions. (I also got this answer right on Plato / Edmentum).