Answer:
Circular motion requires a"centripetal" force. Without a centripetal force, an object cannot travel in circular motion.
The electromagnetic waves are types of waves which do not require medium for them to pass through to be able to travel from one location to another. The different types of electromagnetic waves therefore vary only in their wavelength and frequency. Thus, the answer is letter B.
<span>The shortening velocity refers to the speed of the contraction from the muscle shortening while lifting a load. Maximal shortening velocity is only attained with a minimal load. With a light load, the shortening velocity is at its Maximal shortening velocity. When the weight is heavy, the speed in which the muscle lifts the weight decreases in speed at a slower velocity.</span>
(a) The net force upward force of the helicopter is -35,880 N.
(b) The weight of the helicopter is 45,080 N.
(c) The lift-force exerted by the air on the propellers is 9,200 N.
The given parameters:
- <em>mass of the helicopter, m = 4600 kg</em>
- <em>acceleration of the helicopter, a = 2 m/s²</em>
The net force upward force of the helicopter is calculated as follows;
The weight of the helicopter is calculated as follows;
The lift-force exerted by the air on the propellers is calculated as follows;
Learn more about Newton's 2nd Law here: brainly.com/question/3999427
Answer:
a) Mechanical equivalence of heat
Explanation:
heat is an energy that is transferred from one body to another because of a difference in temperature and in any system of physical units, the number of units of work or energy equal to one unit of heat.