You can’t increase the gravitational pull without the use of mass or energy itself. So both answers talking about gravity is incorrect. C is the obvious choice here. If you increase the amount of matter in an object, the mass will increase
Answer:
Explanation:
When coin is at a height and rest, it only has potential energy( by the virtue of its position). While the coin is falling its potential energy changes into kinetic energy. This means that its potential energy is decreasing and kinetic energy increases. just before its hits the ground kinetic energy is maximum and potential energy becomes zero.
When it hits the ground all its kinetic energy is converted into heat.
Answer:
The railroad is 20,63 m height.
Explanation:
In this problem we have two objects that encounter on a given time that is the same for both objects.
Objects are:
The car moves in constant velocity of 19 m/s. The car makes a trajectory of 39 mts before encounter the bolt that hits the windshield.
Then, for the car we need to find the time that takes to make the trajectory, and we use the formula for uniform rectilinear motion (URM):
where v is velocity, s is space or trajectory, and t is time.
The time t=2.052 sec is the time that takes the bolt to fall and hit the windshield, so, we have to take this time and replace it in following formula that applies for <em>free fall objects:</em>
Answer:
C
Explanation:
Use conservation of momentum
Momentum before collision = mv = 50 (4) = 200 kg-m/s
AFTER collision
30 * 3 + Blue momentum = 200
blue momentum = 110 kg-m/s
Answer:
heat is the transfer of thermal energy from a system to its surroundings or from ... It is very important to know that, in science, heat and temperature are not the same thing. ... Have you noticed that when you put a cold, metal teaspoon into your hot cup of ... AIM: To investigate which materials are the best conductors of heat.
Explanation: