Convection is the transfer of heat through a fluid
Conduction is the heat or electric current from one substance to another
Radiation is energy that radiated or transmitted
Ex: Convection- A pot of water is being boiled- the heat is being transferred to to the water
Ex2: Conduction- I have a plate filled with hot food- the heat from the food is being transferred to the plate, making the plate hot as well.
Ex3: Radiation- There is a dog by the fire place, the dog is being warmed- the heat from the fire is being transferred over to the dog
Hope this will help you with your homework :)
Just do energy spent divided by time to get your answer :). With this we can say a human might be able to!
Answer:
The magnetic field is 
Explanation:
From the question we are told that
The mass of the metal rod is 
The current on the rod is 
The distance of separation(equivalent to length of the rod ) is 
The coefficient of kinetic friction is 
The kinetic frictional force is 
The constant speed is 
Generally the magnetic force on the rod is mathematically represented as
For the rod to move with a constant velocity the magnetic force must be equal to the kinetic frictional force so
=> 
=> 
=>
Answer:
electrical
Explanation:
the TV needs electrical energy to power on
Answer:
1.0326 m/s
Explanation:
mass of each ball, m = 155 g = 0.155 kg
mass of Dash and his skateboard, M = 65 kg
Speed of skateboard moving backward, v = 1.04 m/s
Let the speed of the balls in forward direction is u.
By using the conservation of momentum
Momentum in backward direction = Momentum in forward direction
(M + 3m) x u = M x v
(65 + 3 x 0.155) x u = 65 x 1.04
65.465 u = 67.6
u = 1.0326 m/s
Thus, the speed of balls in forward direction is 1.0326 m/s.
