I WILL NAME YOU BRAINLIEST 8. An empty toy train car of
mass 50 kg coasts along at 5 m/s. A 10-kg toy is
suddenly dropped vertically into the car. Find the speed of the car immediately
after the toy is dropped in.
A. 0.5 m/s
B. 4.2 m/s
C. 5 m/s
D. 50 m/s

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.

Which of the following is the main energy source for the sun? a. fission of hydrogen b. fusion of hydrogen c. fusion of helium d. fission of iron

The electric potential v is constant everywhere within a certain region of space. which statement below is true? the choices are: the electric field is also constant (but not zero) within the region. a charged particle placed within the region will experience an electric force. the electric field is zero everywhere within the region. the electric field varies from place to place within the region.