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A photographer uses his camera, whose lens has a 40mm focal length, to focus on an object 5.0m away. He then wants to take a picture of an object that is 50cm away. How far must the lens move to focus on this second object?
Someone pushed a 7.5 kg box across the room, traveling 12.0 m. The coefficient is 0.34. Find the box's initial speed
question11 the molecular mass of helium is 4 gmol boltzmannrsquos constant is 1.38066 times 10minus23 jk universal gas
A 7.75- g bullet from a 9-mm pistol has a velocity of 397.0 m/s. It strikes the 0.785- kg block of a ballistic pendulum and passes completely through the block. If the block rises through a distance h = 10.15 cm
a 550-kg car traveling at 24.0 m/s collides head on on with a 680-kg pick up truck. what is the momentum of the car before collision
at the instant the traffic light turns green a car that has been waiting at an intersection starts ahead with a
A 1 kg stone is thrown upward from a 20 m building with a vertical velocity of 15 m/s. Compute The velocity at impact with the ground
2. The Horseshoe Falls on the Canadian side of Niagara Falls have water that moves horizontally at 9.0 m/s which then falls 53 m vertically into the Niagara River below. Ignoring any air resistance, at what angle does the falling water enter th..
The diagram below shows a mass moving toward the spring with an initial speed of v0. Find the time required for the mass to rest after contacting the spring
A pulsar is a rapidly rotating neutron star that continuously emits a beam of radio waves in a searchlight manner. Determine the average angular speed (in rad/s) of this pulsar
question1a current experiment demonstrated diffraction of phthalocyanine molecules 514.54 gmol. the molecules have a
An athlete executing a long jump leaves the ground at a 20° angle and travels 6.30 m. how much longer would the jump be
A laser beam is incident on two slits with a separation of 0.175 mm, and a screen is placed 4.85 m from the slits. estimate the wavelength of the laser light
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