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A rocket fires two engines simultaneously. One produces a thrust of 380 N directly forward, while the other gives a 315 N thrust at 34.2o above the forward direction.
Find the magnitude and direction (relative to the forward direction) of the resultant force that these engines exert on the rocket.
A skier of mass 70.0 kg is pulled up a slope by a motor-driven cable. A motor of what power is required to perform this task
A thin bi-convex lens with index of refraction n=1.5has radii of curvature for its left and right surfaces of magnitude15 cm and 30cm respectively. Is the image upright or inverted
A 2.6-kg cart is rolling along a frictionless, horizontal track towards a 1.4-kg cart that is held initially at rest. What is the total momentum of the system of the two carts at this instant
Light is refracted through diamond from air. If the angle of incidence is 30 °, what is the speed of light in diamond
An electron ( mass = 9.11×10?31 ) leaves one end of a TV picture tube with zero initial speed and travels in a straight line to the accelerating grid, which is 1.79 away. It reaches the grid with a speed of 2.96×106 . (You can ignore the gravitati..
A loop of wire (resistance = 2.0 m?) is positioned as shown with respect to a long wire which carries a current. If d = 1.0 cm, D = 6.0 cm, and L = 1.5 m, what current is induced in the loop at an instant when the current in the wire is increasing at..
A small object with momentum 5.0 kg m/s approaches head-on a large object at rest. Find the magnitude of the large object momentum change
Assume an astronaut in training sits in a seat at one end, facing the axis of rotation 29.0 ft away. Determine the rotation rate, in revolutions per second, required to give the astronaut a centripetal acceleration of 18.5g.
The potential difference across a resting neuron in the human body is about 70 mV, How much power does the neuron release
What are the four lowest standing-wave frequencies for an organ pipe that is 4.44 m long and closed at one end? (Assume a temperature of 20° C.)
Radiation at temperature Ti fills a thermally insulated cavity of volume V. If the cavity expands isentropically to volume rV, how much work is done by the radiation , as a fraction of its initial energy? How much work would be done if the expansion ..
A particle with charge -3.74 x 10-6 coulombs is released at rest in a region of constant, uniform electric field. Compute how long after the particle is released has it travelled through a potential difference of 0.351 volts
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