Which substance has the highest density at room temperature?

a. hydrogenc. waterb. oxygend. they are all the same

What is responsible for making stars shine protons the sun the moon photons

In outer space a rock of mass 11 kg is acted on by a constant net force 31, - 10, 47 N during a 4 s time interval. At the end of this time interval the rock has a velocity of 110, 80, 105 m/s.

There are 1,000,000 grains of sand in a heap. If we remove one grain, it is still a heap. If we remove another grain, if it still a heap.

A series circuit contains a 30 Ω resistor, a 20 Ω resistor, and a 10 Ω resistor. The power supply provides 100 V to the circuit. The current in the 10 Ω resistor, to two significant figures, is ___A.

An electric iron operates on a 120-volt outlet and uses 2.30 amps of current. How much power does the iron use? A. 0.019 watts B. 276 watts C. 52 watts D. 630 watts

Process by which water vapor changes to a liquid Evaporation Condensation Convection radiation

Part A Find the energy U0 stored in the capacitor. Express your answer in terms of A, d, V, and ϵ0. Remember to enter ϵ0 as epsilon_0.

How many discovered planets are there

Why is a block of gold is more dense than a block of iron of equal size?

How much work is required to uniformly accelerate a merry-go-round of mass 1490 kg and a radius of 7.80 m from rest to a rotational rate of 1 revolution per 8.33 s? Model the merry-go-round as a solid cylinder (I = ½ MR2).