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A 20-kg loudspeaker is suspended 2.0 m below the ceiling by two ropes that are each 30° from vertical, what is the magnitude?
A helium-neon laser emits a beam of circular cross section with a radius r and a power P. Find the maximum electric field in the beam
A stainless-steel orthodontic wire is applied to a tooth, find the magnitude and direction of the force on the tooth
A space vehicle is coasting at a constant speed of 21.3 m/s in the +y direction relative to a space station. The pilot of the vehicle fires a thruster which causes it to accelerate at 0.35 m/sin the +x direction. After 46.0 seconds the pilot shuts of..
A juniper wood plank measuring 5 ft by 0.6 ft by 0.3 ft is totally immersed in water. What is the net force acting on the plank
A 79 kg runner exerts 340 N of horizontal force as he pushes off the ground. The vertical ground reaction force at this time is 970 N. There are 75 N of air resistance working against his motion. What is the direction in degrees of the resultant exte..
An airport luggage carousel has a slope of 15° down outward. A piece of luggage, coming out of the carrying belt, lands at 2.5 m away from the center of carousel. What is the coefficient of static friction between the language and the carousel surf..
A satellite is in a circular orbit around the Earth at an altitude of 3.28 106 m. (a) Find the period of the orbit. (Hint: Modify Kepler's third law: T2 = 4?2 GMS r3 so it is suitable for objects orbiting the Earth rather than the Sun.
two charges are placed on the x axis. one of the charges q1 7.6 microc is at x1 3.4 cm and the other q2 -20 microc
There are two light bulbs in a circuit, powered by one battery. One light bulb is a 100 watt light bulb and the other a 200 watt light bulb. How much power must the battery be supplying for the lights to be running at full power?
Consider the equation for the velocity of an electromagnetic wave in a wire on the bottom of page 621. Under what conditions would this velocity be greater than c (the speed of light)?
An electron is accelerated from rest to 5.60x10^6 m/s in 1.50 us by a uniform electric field calculate the work done by the electric field
the top of a swimming pool is at ground level. if the pool is 2.28 m deep how far below ground level does the bottom of
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