Answer:
6.5 kW
Explanation:
Input power = 20 kW = 20000 W
h = 45 m
Volume flow per second = 0.03 m^3 /s
mass flow per second = volume flow per second x density of water
= 0.03 x 1000 = 30 kg/s
Output power = m g h / t = 30 x 10 x 45 = 13500 W
Power converted in form of heat = Input power - Output power
= 20000 - 13500 = 6500 W = 6.5 kW
Thus, mechanical power converted into heat is 6.5 kW.
Answer:B. two larger, less stable nuclei
Explanation: They collied and don't combine
Answer: yes.
Explanation: The light that will be incidented on that metal is visible light.
It depends on 3 factors:
1. The temperature
2. The specific heat capacity of the metal
3. The thermal conductivity of the metal.
The metal getting warmer also depend on the reflection and the absorption of light energy in which it will surely absorb some energy and not reflect all.
When visible light is absorbed by an object, the object converts the short wavelength light into long wavelength heat. This causes the object to get warmer.
Answer:
The value is 
Explanation:
From the question we are told that
The mass of the block is 
The force constant of the spring is 
The amplitude is 
The time consider is 
Generally the angular velocity of this block is mathematically represented as
=> 
=> 
Given that the block undergoes simple harmonic motion the velocity is mathematically represented as
=> 
=>
Answer:
B
Explanation:
because, convection is the transfer of heat between fluid substances/materials
