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A standard interior staircase has steps each with a rise (height) of 20 cm and a run (horizontal depth) of 25 cm. Research suggests that the stairs would be safer for descent if the run were, instead, 31 cm. For a particular staircase of total height 5.80 m, how much farther (in m) would the staircase extend into the room at the foot of the stairs if this change in run were made?
Obtain the wavelength in vacuum for blue light, whose frequency is 6.58 1014 Hz
Partciles (mass of each =.2kg) are placed at the 80 cm and 100 cm marks of a meter stick. the mass of the meter stick is .3kg. what is the moment of inertia of the body
A 5 g bullet with an initial velocity of 95 m/s lodges in a block of wood and comes to rest at a distance of 6 cm. assume the bullet undergoes a constant negative acceleration; it slows at a constant rate. How much time does it take for bullet to ..
A heavy-duty stapling gun uses a 0.164 kg metal rod that rams against the staple to eject it. The rod is pushed by a stiff spring called a "ram spring" (k = 30071 N/m). find the speed of the ram at the instant of contact
Two boats start together and race across a 68 km wide lake and back. Boat A goes across at 68 km/h and returns at 68 km/h. What is the average velocity of the winning boat
A 70.0 kg construction worker stands at the far end of the beam. What is the magnitude of the torque about the point where beam is bolted into place.
The light goes through a second polarizer and exits with an intensity of 225 W/m squared, What is the orientation angle of the second polarizer
Unpolarized light is incident on a series of two Polaroid sheets. The intensity of the light emerging from the second sheet is 18.4 percent of the intensity of the light incident on the first sheet. Find out the angle between the transmissions axe..
A 180g air-track glider is attached to a spring. The glider is pushed in 12.4cm and released. A student with a stopwatch finds that 12.0 oscillations take 12.5s . What is the spring constant?
A 2.5 m-long pendulum is released from rest when the support string is at an angle of 20° with the vertical. What is the speed of the bob at the bottom of the swing?
A small sphere with a mass of 441 g is moving upward along the vertical +y-axis when it encounters an electric field of 5.00 N/C. what is the charge that it carries
A 75 kg person escapes from a burning building by jumping from a window 25-m above a catching net. Assuming that air resistance exerts a 95-N force on the person all through the fall, determine out the person's velocity just before hitting the net..
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