(2) A sphere A of mass m1 moving with speed υ1 collides centrally and elastically with a stationary sphere B of mass m2. The rate of change of the kinetic energy of sphere A depends on: a) from the time that the impact of the spheres lasts.
b.) from the initial momentum of the sphere A.
c). from the masses of the spheres
.d) from the initial velocity of the sphere A.

choose the correct answer

(3)During the central and elastic impact of two spheres, the difference of their velocities before the impact is:
a) greater than the difference of their speeds after the impact
b) equal to the difference of their speeds after the impact
c) less than the difference of their speeds after the impact
d) opposite to the difference of their speeds after the impact

choose the correct answer



Aregular polygon has angkes of size 150° each. how many side has the polygon

What is the magnitude of the resultant vector round your answer to the nearest tenth

While studying chemical reactions and conservation of matter, sarah's class conducted a variety of experiments. sarah and her lab partner found the mass of a wax candle and placed the candle in a flask. the students lit the candle and let it burn to completion. all that was left was wax and charred candle wick. per their teacher's instructions, the students found the mass of the products. their data can be seen in the data table. formulate a hypothesis the students could test to explain why the experiment did not support the law of conservation of matter. a) the students could repeat the experiment using different candles; there might have been a flaw in the candle. b) the experiment should be repeatable. the students should run several trials and then take an average of the after mass in each trial. c) the students should have someone in the class check their measurement skills as they repeat the experiment. they may have made an error using the balance. d) the students should burn the candle in a container that has some type of lid so that any gas that is a product of the reaction can be contained and massed. submit