Answer:
When we run a piece of paper with the oil in our head with the help of a comb produces electrostatic force.
Balloons get attracted to another balloon when one of them are rubbed with hair.
Explanation:
Those are 2 examples of electrostatic force.
Answer:
Explanation:
It is given that,
Mass of the train car,
Initial speed of the train car,
Initial speed of the second car,
After the collision, both cars stick together and move off with a speed of 4.00 m/s, V = 4 m/s
Let is the mass of the second car. It can be calculated using the conservation of momentum. In case of inelastic collision, after collision both objects move with a common speed.
So, the mass of the second car is 33833.33 kg. Hence, this is the required solution.
1Hz = One Cycle and One Cycle = 360degrees
When you want to find the difference caused by a time separation of two waves, you can find how much of a wave cycle will pass during the time delay.
At 0.25Hz, it takes 4 seconds to make 1 Cycle. With some algebra you find that 1 cycle every 4 seconds = <em>a quarter cycle every 1 second</em>.
So now that you know a one second delay causes a quarter of a cycle to pass, you can convert that into degrees by multiplying 0.25 and 360. 0.25x360=90
Lo and behold, a time difference of 1 second, creates a <u>phase seperation of 90 degrees</u>.