Which type of friction keeps a pile of rocks from falling apart?

A 1.5 V battery is connected to a bulb of resistance of 4.5 Ω. What is the current in the bulb?

How does seismograph work

What is the effect on current if both the voltage and the resistance are halved?

When finding the upper bound of the density, you put what number in the denominator?

If an object accelerates from rest, with a constant acceleration of 5.4 m/s2, what will its velocity be after 28s?

A small refracting telescope designed for individual use has an objective lens with a diameter of 6.00 cm and a focal length of 1.325 m. what is the f-number of this instrument?

You drop a ball from a height of 2.0 m, and it bounces back to a height of 1.5 m. (a) what fraction of its initial energy is lost during the bounce? (b) what is the ball's speed just as it leaves the ground after the bounce?

Why do scientists prefer the moment magnitude scale to the richter scale?

A particle with a charge of - 5.10 nC is moving in a uniform magnetic field of B⃗ = - (1.20 T) k^. The magnetic force on the particle is measured to be F⃗ = - (3.30*10-7 N) i^ + (7.60*10-7 N) j^.

What is the pressure 100m below the surface of the sea, if the density of sea water is 1150kg/m3