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Question: If the speedometer of your car reads 5mph more than it did 2 s earlier, what was your average acceleration in mph per second? Such a mixture of units can be awkward, so convert them to m s-2.
A boy has a 100-g stone. He places it in a leather pouch attachedto the end of a 1-meter leather thong. what was the velocity of the stoneas it left the pouch
A turbine disk of mass 26 kg rotates at a constant rate of 9600 rpm. Knowing that the mass center of the disk coincides with the center of rotation O, determine the reaction at O immediately after a single blade at A, of mass 45 g, becomes loose a..
Laser light of wavelength 632.8 nm falls normally on a slit that is 0.0210mm wide. What is the maximum intensity of the bright fringe
The acceleration of gravity is 10 m/s2. What is the acceleration of a 39 kg pail of cement that is pulled upward (not sideways) with a force of 421 N? Answer in units of m/s2.
A grating has 380 rulings/mm and is 6.2 mm wide. How many higher orders of maxima can be seen
Assume the mass of the car is 65.0 kg and it starts at 30.0 m above the ground Use the graph above to find the kinetic energy, potential energy, and velocity for points C, D, E, F, and G to complete the table.
A pencil beam of 200-keV photons is normally incident on a 1.4-cm-thick sheet of aluminum pressed against a 2-mm- thick sheet of lead behind it. What fraction of the incident photons penetrate both sheets without interacting? What would be the differ..
A 5 m deep river runs on a horizontal 7 m long bridge and 8.5 m wide, which is hung in air 10 m high above the ground. What is the normal force exerted upwards by the bridge
A pulsed laser emits light at a wavelength of 480.7 nm. The pulse duration is 12.1 ps and the energy per pulse is 0.190 J. What is the length of the pulse
A centrifuge in a medical laboratory is rotating at an angular velocity of 360 revolutions/minute. When it is switched off, it rotates 50 times before coming to rest. Find the constant angular deceleration of the centrifuge
Two 2.7cm -diameter disks face each other, 2.7mm apart. They are charged to ±14nC. What is the electric field strength between the disks
Synchronous communication satellites are put into orbit at a distance of 42300 kilometer from earth. determine the arc length that separates the two satellites in orbit
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