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A communications satellite with a mass of 180 kg is in a circular orbit about the Earth. The radius of the orbit is 45900km as measured from the center of the Earth. What is the weight of the satellite on the surface of the Earth? What is the gravitational force exerted on the satellite by the Earth when in orbit?
A Nichrome wire is used as a heating element in a toaster. From the moment the toaster is first turned on to the moment the wire reaches it maximum temperature, What is the temperature change in the wire
q. a speed ramp at an airport is basically a large conveyor belt on which you can stand and be moved along. the belt of
A 45-kg crate slides to the left initially at a speed of 5.2 m/s. A rope pulls on it with a tension of 240 N in a direction 35 degrees above the horizontal to the right. How much time is required to bring the crate to a stop
A converging lens (f = 11.9 cm) is located 30.6 cm to the left of a diverging lens (f = -5.94 cm). calculate the overall magnification
An electron follows a helical path in a uniform magnetic field of magnitude 0.642 T. What is the electron's speed
A Ferris wheel with a radius of 7.7 m rotates at a constant rate, completing one revolution every 37 s, Find the direction and magnitude of a passenger's acceleration when at the bottom of the Ferris wheel
The armature of a shunt motor has a mass of 250 kg and a diameter of 30 cm. assume the mass of the amature is evenly distributed in the armature. find the rotational inertia of the armature.
Brain injuries in auto accidents. Brain injuries generally occur any time the brain's acceleration reaches 100 g for even a short time. Find the maximum speed with which the car can strike the barrier without causing brain injury, using an airbag
A thin uniform rod (length = 10.0 cm, mass = 250 g) is pivoted about a horizontal frictionless pin through one end of the rod
two spaceships are traveling in the same direction. With respect to an inertial frame of reference spaceship A has a speed of 0.850c. Find the speed Vab of spaceship A relative to spaceship B
An iron casting containing a number of cavities weighs 16967.7 N in air and 13515.2 N in water. What is the total volume of all the cavities in the casting
A mass is stretched 4 centimeters from the equilibrium position of a spring. If the displacement is doubled, what can be concluded about the restoring force? A. It is halved. B. It is doubled. C. It stays the same. D. It is increased by 4. E. It i..
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