A2-kg object, moving at 1 m/s, collides with a 1-kg object that is initially at rest. after the collision, the two objects are found to move away from each other at 1 m/s. assume they form an isolated system. (a) what are their actual final velocities in the earth reference frame? (b) what is the velocity of the center of mass of this system? does it change as a result of the collision?

Which units can be used to measure length or distance? check all that apply. gram meter kilometer liter inch

Lymphocytes known as blastocysts make antibodies that fight infection. select the best answer from the choices provided t f

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