the answer should be 20 seconds
Answer:
Heat sink is a heat exchanger used to transfer heat generated by a mechanical or an electronic device to the surroundings. Heat sinks are either made up of aluminium or copper or any other material which is good conductor of heat. Because conductor helps in conduction of heat from heated surface to the outside air.
Explanation:
<h2>Answer:-</h2>
The Object was at rest. So, Initial Velocity is Zero.
- [Initial Velocity]u = 0
- [Final Velocity]v = 20 m/s
- [Time]t = 2 seconds
- Mass = 4kg
- Force = ?
We know that:-
Applying it, we get:-
Hope it helps :)
Answer:
d. All of the above
Explanation:
Here is the complete question
A mechanical wave can be defined by which of the following?
a. Carries energy from one place to another
b. Moves through solids, liquids, and gasses
c. Is created when a source of energy creates a vibration
d. All of the above
Solution
A mechanical wave is an oscillation of matter which carries energy from one place to another. This oscillation of matter shows that a mechanical wave requires a medium to pass through, be it solid, liquid or gas.
A mechanical wave can usually be created by the the vibration of a medium due to a source of energy.
Examples of mechanical waves are sound waves and water waves
Since all these characterize a mechanical wave, the option d is the correct answer