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A rocket is launched vertically upward from rest in the Earth's gravitational field, near the Earth's surface. The fuel is expelled with a relative speed u with respect to the rocket. Assume the gravitational field is constant. In addition, there is an external time-dependent force that opposes the rocket's motion, with magnitude equal to βt, where t is the time elapsed since the rocket was launched and β is constant. Half of the rocket's initial mass is fuel. Calculate the velocity of the rocket as a function of the time it takes to burn the fuel, until the fuel is spent.
Calculate the peak voltage of a generator that rotates its 210 turn, 0.100 m diameter coil at 3600 rpm in a 0.830 T field
A convex mirror has a focal length of magnitude 1 m. An object is 3.0 m in front of this mirror. Find the image distance and describe the image and magnification. A concave mirror has a focal length of 1 m. An object is placed 3.0 m in front of it..
A 0.30m radius tire accelerates from rest at a constant 2.0rad/s2 over a 5.0 sec interval. What is the tangential component of acceleration for a point on the outer edge of the tire through the 5 sec interval?
A proton is released at the origin in a constant electric field of 850 N/C acting in the positive x-direction. Discover the change in the electric potential energy associated by the proton after it travels to x = 2.5 m.
The work function for barium is 2.50 eV. Find the cutoff wavelength for barium
A person driving her car at 47.0 km/hr approaches an intersection just as the traffic light turns yellow, The car can accelerate from 47.0 km/hr to 75.0 km/hr in 6.40 s. How far from the intersection will she be when the light turns red
A 11 kg box must be slid across the floor. what is the minimum force needed to start the box moving from rest
a 17.0-g piece of styrofoam carries a net charge of -0.75 microc and is suspended in equilibrium above the center of a
What are the types of compound pendulum?
an isolated conducting sphere has a 9 cm radius. one wire carries a current of 1.000 002 0 a into it. another wire
Two charges are fired directly at each other. Both charges have different masses and different initial velocities so that the initial momentum of the system is not necessarily zero. Assume that the net momentum of the system is \(\overrightarrow{{..
They are dropoped simutaneously from a cliff. Compare their accelerations at midpoint in their fall. Does one mass reach the midpoint before the other?
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