At what angle θ must the 630-lb force be applied in order that the resultant r of the two forces has a magnitude of 1520 lb? for this condition determine the angle β between r and the vertical.

If a substance or object has the ability to do work, then it has

Which of the following is an example of diffraction? A. Hearing a band play through an open doorway without seeing them. B. Sitting in a room and watching a band play. C. Playing in a band. D. None of these examples show diffraction.

A weightlifter liftsa 1,250-N barbell 2 m in 3 s. how much power was used to lift the barbell?

Three sleds (30kg sled connected by tension rope B to 20kg sled connected by tension rope A to 10kg sled) are being pulled horizontally on frictionless horizontal ice using horizontal ropes. The pull is horizontal and of magnitude 143N. Required:a.

A glider moving with a speed of 200 kilometers/hour experiences a cross wind of 30 kilometers/hour. What is the resultant speed of the glider relative to the ground?

Which of The following are classiFcatons describing how rock and oTher maTerial movedownslope? a. Fall, b. slide, c. slump, d. creep, e. fow

What is the acceleration of a 32-kg object if a 6.75-N force is applied to it? a. 0.21 m/s2 b. 4.74 m/s2 c. 21.09 m/s2 d. 216.00 m/s2

Gravitational force is a (n) ? A) attractive force B) repulsive force C) both an attractive and repulsive force D) neither an attractive or repulsive force

A damped harmonic oscillator loses 6.0% of its mechanical energy per cycle. a. by what percentage does its frequency (equation 14-20) differ from its natural frequency? b.

What element will form an ionic bond with carbon