Why does an object accelerate when it falls toward the earth's surface

If the absolute temperature of a gas is 600 K The temperature in degrees Celsius is

Smialarities between kinetic friction and static friction?

Magnetic field lines exit out of the?

A proton (charge + e, mass mp), a deuteron (charge + e, mass 2mp), and an alpha particle (charge + 2e, mass 4mp) are accelerated from rest through a common potential difference ΔV.

What is the relationship between the line current i l and the phase current i1 in a balanced delta system?

What color of light can plants "see"?

Two tiny beads are 25 cm apart with no other charges or fields present. Bead A carries 10 µC of charge and bead B carries 1 µC. Which one of the following statements is true about the magnitudes of the electric forces on these beads

A ball is thrown straight up at 20 m. What is the balls velocity as it hits the ground?

Block 1 and Block 2 have the same mass, m, and are released from the top of two inclined planes of the same height making 30 degree and 60 degree angles with the horizontal direction, respectively.

Water waves change direction when they encounter water of different depths and begin to move at different wave speeds. This is called A. reflection B. constructive interference C. the Doppler effect D. refraction