Answer:
decrease
Explanation:
Rate of production of heat = 100 J/s
Rate of heat flowing out = 200 J/s
As the rate of flowing heat is more than the rate of generating heat so the temperature of body will decrease.
Answer:
The thermal energy is carried by electromagnetic waves
Explanation:
There are three types of transfer of heat (thermal energy):
- Conduction: conduction occurs when two objects/two substances are in contact with each other. The heat is transferred from the hotter object to the colder object by the collisions between the molecules of the two mediums.
- Convection: convection occurs when a fluid is heated by an external source of heat. The part of the fluid closer to the heat source gets warmer, therefore it becomes less dense and it rises, and it is replaced by the colder part of the fluid, which is colder. Then, this part of fluid is heated as well, so it gets warmer, it rises, etc.. in a cycle.
- Radiation: radiation occurs when thermal energy is carried by electromagnetic waves. Since electromagnetic waves do not need a medium to propagate, this is the only method of heat transfer that can occur through a vacuum (so, in space as well).
Indeed, the Sun emits a lot of electromagnetic radiation, which travels through space and eventually reaches the Earth, heating it.
Answer:
a magnet can be used to hold things into a fridge and it is also used a a car junkyard.
Explanation:
Basically a magnet attracts metal making the two magnetic objects connect together
Hey There!
The atomic number represents the electrons and protons, therefore, if the atomic number of the element is 7 then there are 7 electrons and protons in the element.
In order to determine the amount of neutrons, you would subtract the atomic number from the atomic mass.
Hope this helped!
Final velocity is equal to initial plus acceleration multiplied by time
Vf = Vi + at
Vf = (15m/s) + (5m/s^2)(5s)
Vf = 15m/s + 25m/s
Vf = 40m/s
This is straight from the kinematic equations. If you can’t solve a simple problem like this, I suggest tryin to study it a bit more. You’re gonna have trouble if you can’t dissect a word problem