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The front end of an automobile has been designed so that upon impact it progressively crumples by as much as .70m. Suppose that the automobile crashes into a solid brick wall at 80 km/h. During the collision the passengner compartment decelerates over a distance of 0.70m. Assume that the deceleration is constant. What is the magnitude of the deceleration? If the passenger is held by a safety harness, is he likely to survive? (Hint: Compare the deceleration with the accerleration listed of a parachutist in Table 2.2.)
you are leaking one liter of methyl alcohol methanol every 3 hours. at the start of the day you have a concentration of
A cylindrical container 1.6 m tall contains mercury to a certain depth d. The rest of the cylinder is filled with water. If the pressure at the bottom of cylinder is two atmospheres, what is the depth d.
A steel cable with total length 20 m and mass 100 kg is connected to two poles. The tension in the cable is 2,000 N, and the wind makes the cable vibrate with a frequency of 2 Hz. compute the wavelength of the resulting wave on the cable.
A boy whirls a stone in a horizontal circle of radius 1.2 m and at height 1.5 m above level ground. What is the magnitude of the centripetal acceleration of the stone
A lens for a 35-mm camera has a focal length given by f = 47 mm. What is the magnification of the image on the film
A -kg box is being lifted by means of a light rope that is threaded through a single, light, frictionless pulley that is attached to the ceiling, what average power is delivered by the person pulling on the rope
A woman on a 10 speed bicycle travels at 9 m/s relative to ground as a she passes a little boy on a tricycle going in the opposite direction. If the boy is travelling at 1m/s relative to the ground, how fast does the boy appear to be moving relati..
Electrons in a photoelectric experiment emerge from an aluminum surface with a maximum kinetic energy of 1.3eV
Two charged, parallel, flat conducting surfaces are spacedd=2.00cm apart, What is the initial speed of the electron if it stops just at the second surface
A 2.8 kg block slides along a frictionless horizontal with a speed of 5.5 m/s. After sliding a distance of 8m, the block makes a smooth transition to a frictionless ramp inclined at an angle of 43 degrees to the horizontal. The acceleration of gravit..
The diameter of our disk-shaped galaxy, the Milky Way, is about 1.0 105 lightyears (ly). find the distance between the centers of the two plates
A car is traveling at 50.0 mi/h on a horizontal highway, What is the stopping distance when the surface is dry and µs = 0.601
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