An ideal horizontal spring with spring constant 800 n/m is initially compressed 0.20 m. one end is attached to a wall and the other end touches a 4.0 kg block (not attached). the system is released from rest and the block slides 2.0 m from the release point before coming to rest. the horizontal surface below has a uniform roughness. what can we conclude about the coefficient of kinetic friction between the surface and the block?

Space vehicles traveling through earth's radiation belts can intercept a significant number of electrons. the resulting charge buildup can damage electronic components and disrupt operations. suppose a spherical metallic satellite 1.3 m in diameter accumulates 3.0 µc of charge in one orbital revolution. (a) find the resulting surface charge density. (b) calculate the magnitude of the electric field just outside the surface of the satellite, due to the surface charge.

Which statement about covalent bonds is true

Assume this car is driven off a cliff . how many arrows of force need to be drawn in the free body diagram? assume no air resistance -five -one -three -four