How do contact forces such as friction differ from gravitational and magnetic forces?
Answers
"Contact" means "touching". A contact force can't act on an object unless they're touching. Friction is a contact force.
Gravitational forces pull masses together even if they're not touching. Magnetic forces pull a piece of iron toward a magnet even if they're not touching.
Gravitational and magnetic forces are "non-contact" forces.
From this diagram which of the following can you conclude
Answers
Answer: A
Explanation:
I say opposites attract
The answer is A.
Hope this helps :)
What processes will a gas undergo when deposition and condensation occur?
Answers
When condensation happens to a gas element, there will be an instance where it will suddenly turn into a liquid element. On the other hand, deposition is a process where the gas will turn into a solid element once it happens.
The mass of a football player who weighs 1250N
Answers
Ah hah ! That depends on where he weighs 1250N, because weight depends not only on mass but also on the local gravity. So the same mass can have different weights in different places, and the same weight can indicate different mass in different places.
Weight = (mass) x (acceleration of gravity) .
Note: 1250N is almost exactly 281 pounds.
-- If he weighs 1250N on Mars, then his mass is 336.8 kg.
-- If he weighs 1250N on Earth, then his mass is 127.5 kg.
-- If he weighs 1250N on the Moon, then his mass is 770.2 kg.
Do waterfalls and rapids occur where rivers meet and flow over hard rocks ?
Answers
Waterfalls occur when there is a sudden drop. For example the land may be 40ft up, but then suddenly it drops to 10ft above sea level. Rapids occur when the water is running through a downhill slope with a bunch of rocks.
What is a series circuit? (Definition)
Answers
A series circuit is a circuit in which resistors are arranged in a chain, so the current has only one path to take. The current is the same through each resistor. The total resistance of the circuit is found by simply adding up the resistance values of the individual resistors: