A 20 kg mass is dropped from a tall rooftop and accelerates at 9.8 m/s2. What is the weight of the dropped object?

When two 10-Ohm resistors are in parallel in a circuit, what is the net resistor value

What is a wavelength? a. the highest part of the wave b. the distance between two wave troughs c. the speed of energy of the wave d. the lowest part of the wave

Materials with the same R-value have the same ability to insulate. a. True b. False

Why does mercury have so little gas in its atmosphere?

What is the net force required to give an automobile with a mass of 1,600 kg an acceleration of 4.5 m/s2

The chord sung by the three Roche sisters in the aliasing demonstration in class was B flat major, consisting of the notes Bflat4, F4, and D4 ("4" refers to the fourth octave on the piano). The frequencies corresponding to these notes are 466.

1) Harold pushed a 10 kg box to the right with 7 Newtons of force. Jerome pulled the same box to the right with 7 Newtons of force. Are the forces on the box balanced? Will the box accelerate?

9. How are the fossils in question 8 formed?

A skier slides horizontally along the snow for a distance of 12 m before coming to rest. the coefficient of kinetic friction between the skier and the snow is μk = 0.060. initially, how fast was the skier going?

Been on this problem for 2 hours now: Four identical springs support equally the weight of a 1150kg car. If a 91kg driver gets in, the car drops 6.8mm.