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How much time will a batter have to decide to swing at a 90 mph pitch released 56 ft from the plate if it takes him 0.3 seconds to actually swing the bat?
q1. two slits are illuminated by a 621nm light. the angel between the zeroth-order bright band at the center of the
A parallel plate capacitor of capacitance 4.9 µF has the space between the plates filled with a slab of glass with ? = 4.0. Find the charge on the plates after the glass is removed
a student is moving a safe onto a platform. the student needs to push the safe 2.3 m horizontally and then lift it 1.2
A neodymium-glass laser emits short pulses of high-intensity electro magnetic waves. The electric field of such a wave has an rmsvalue of Erms=2.0E9 N/C. Find the average power of each pulse thatpasses through a 1.6E-5 m2 surface that is perpendic..
The temperature of a quantity of ideal gas is increased by a factor of 5.00 and its volume is decreased with a factor of 1/5.00. By what factor does the pressure change?
A 96.0 Kg man stands on a bathroom scale in an elevator that is accelerating upward at a rate of 1.90m/s^2. What is the bathroom scale reading in lbs
A 1.25-m-diameter wrecking ball hangs motionless from a 1.75-cm-diameter cable. how much does the cable stretch
Calculate the kinetic energies of two uniform solid cylinders, each rotating about its central axis. They have the same mass, 2.75 kg
A convex lens of focal length 10 cm is placed 40 cm in front of a concave lens of focal length 25 cm.A small object is placed 20 cm in front of the convex lens calculate the location of the final image relative to the second lens.
At a certain distance from the center of the Earth, a 4.0- object has a weight of 3.0 . If the object is now moved twice as far from the Earth, by what factor does its weight change?
A car driving directly north on the freeway at a speed of 110 km/h and a truck is leaving the freeway driving 85 km/h in a direction 35 west of north
A 0.740 m long brass pendulum experiences a 20.0°C temperature increase, Find the ratio of the change in period to the original period, What is the change in the period
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