40 POINTS! Some kids are playing a game of marbles in which a large marble is flicked at smaller marbles to knock them out of a circle. Assuming that the collisions between the marbles are perfectly elastic, which of the following statements is true when a large marble collides with a smaller marble?
A. Both the kinetic energy and the momentum of the system are conserved.
B. Neither the kinetic energy nor the momentum of the system is conserved.
C. The momentum of the system is conserved, while the kinetic energy of the system is not conserved.
D. The kinetic energy of the system is conserved, while momentum is not conserved.

Abaseball picther can throw a ball at about 90 miles per hour, v = 40 m/s, on solid rock ground. we now put him into space. when he throws the ball, which weighs mb = 0.15 kg moves away from himat the same speed. how long does it take the ball thrown in space to travel the 30 meters to the batter? he weighs mp = 100kg

A3.9 g aluminum foil ball with a charge of +4.1×10−9 c is suspended on a string in a uniform horizontal e⃗ field. the string deviates to the right and makes an angle of 30∘ with the vertical. part a part complete what information about the e⃗ field can you determine for this situation? what information about the field can you determine for this situation? only the magnitude of e⃗ only the direction of e⃗ both the magnitude and the direction of e⃗ none of the above previous answers correct part b determine the magnitude of the electric field. express your answer with the appropriate units. e e = nothing nothing request answer part c determine the direction of the electric field. determine the direction of the electric field. to the right to the left away from you toward you

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.