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The water skier is at an angle of 35o with respectto the center line of the boat, and is being pulled at a constantspeed of 14 m/s . If the tension in the tow rope is 90.0 N, (a) howmuch work does the rope do on the skier in 10.0 s? (b) How muchwork does the resistive force of water do on the skier in the sametime?
A dam holds back water. In the dam is a turbine that produces power with an efficiency of 0.73. what is the velocity of the water leaving the turbine
q1. a .800 kg block is attached to a spring with spring constant 16.0 nm. while the block is sitting at rest a student
a heat pump has a coefficient of performance equal to 4.35 and requires a power of 1.77 kw to operate.a how much energy
An outside loudspeaker (considered a small source) emits sound waves with a power output of 100 W. (a) Find the intensity 10.5 m from the source. W/m2 (b) Find the intensity level in decibels at that distance. dB (c) At what distance would you experi..
A hypothetical 40cm long arm is assumed to be weightless. What is the maximum weight that can be held in the hand if the muscle is attached 1 cm from the below
The radius of a black hole is the distance from the black hole's center at which the escape speed is the speed of light. What is the radius of a black hole with a mass five times that of the Sun
Radio waves are diffracted by large objects such as buildings, whereas light is not noticeably diffracted by large objects such as buildings. Why is this?
A light spring with a force constant of 12 is connected to a wall and to a 1.9 toy bulldozer, What is the numerical value of this coefficient of friction
As a bar magnet moves toward a 150-turn coil, the magnetic field (which is perpendicular to the plane of the coil) changes from 0.25 T to 0.53 T in 0.3 s. what is the magnitude of the induced current in the coil
A coil has 2.72 ? resistance and 0.405 H inductance. If the current is 4.92 A and is increasing at a rate of 4.42 A/ s, what is the potential difference across the coil at this moment
a person rides on a 12-m-diameter ferris wheel that rotates at the constant rate of 6.6 rpm. calculate the magnitude
A particle ( m = 1 kg ) moves on the x axis. The initial position isx= 0 and the initial velocity isv(0) = 5m/s. Determine the final velocity of the particle
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