Need help with the explanation part of this question A group of friends go sliding down a water slide seperately, they sit on a sled and go down the slide.
The decrease in gravitational potential energy of one rider on the slide was7.66kJ, the rider moved through a verticle height of 16.0M with a gravitational field of 9.8 N/Kg

at the bottom of the slide, all the friends and their sleds have approximately the same speed. why? (4 Marks)

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

Aturntable that spins at a constant 74.0 rpm takes 3.10 s to reach this angular speed after it is turned on. find its angular acceleration (in rad/s2), assuming it to be constant, and the number of degrees it turns through while speeding up.

How does the strength of the electrostatic force between an electron and a proton compare to the strength of the gravitational force between them?