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A rocket is projected upward from the earth's surface (r=r(e)) with an initial speed v(0) that carries it to a distance r=1.5 R(e) from the center of the earth. What is the launch speed v(0)? Assume that air friction can be ignored.
What is the frequency of rotationA 10kg baby is perched at the rim of a 40kg disk. The disk rotates freely in a horizontal plane at 1 rev/s. What is the frequency of rotation in rev/s when the baby arrives at the center
Light from the bottom of a swimming pool is incident on the surface at an angle of 20°. What is the angle of refraction
A space probe in deep space is moving along the x-axis at a speed of v0 when it is hit by a meteor. What is the final direction and speed (in terms of v0) of the probe
An object of mass 17.0 kg subjected to a non-zero net force moves with an acceleration of 2.6 m/s2. Determine the net force acting on it
A 23-g bullet traveling 225 m/s penetrates a 3.2-kg block of wood and emerges cleanly at 185 m/s If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges?
The figure shows a closed Gaussian surface in the shape of a cubeof edge length 2.7 m, with one cornerat x1 = 4.6m,y1 = 4.5 m. Thecube lies in a region where the electric field vector is givenby = -2.8 -4.2 y2 +2.2 N/C, with y in meters. What is the ..
The temperature inside the refrigerator is 2.0 °C. It stands in a kitchen whose temperature is 22 °C, what is the entropy change of the kitchen
A car starts from rest and accelerates uniformly over a time of 5.21 seconds for a distance of 110 m. Determine the acceleration of the car
A textbook of mass 1.98kg rests on a frictionless, horizontal surface. A cord attached to the book passes over a pulley whose diameter is 0.160m , find the tension in the part of the cord attached to the book
Two identical guitar strings are prepared such that they have the same length (1.91 m) and are under the same amount of tension. compute the wave propagation speed on the guitar strings
A 175 watt motor is used to lift a 129 kg container to a height of 7m. How much time does it take to lift container with the motor.
A solid sphere of mass 6.0 kg is mounted on a vertical axis and can rotate freely without friction, What is the speed of the block after it has fallen 80 cm
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