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A 0.5-kg rubber ball is dropped from rest a height H = 19.6 m above the surface of the Earth. It strikes the sidewalk below and rebounds up to a maximum height of 4.9 m. If the magnitude of the average force the sidewalk exerts on the ball during the collision is 73.5 N, how long (in s) was the ball in contact with the sidewalk?
spy planes fly at extremely high altitudes (25.5 km) to avoid interception. what must be the minimum aperture of the camera lens to afford this resolution
A velocity selector has a magnetic field of magnitude 0.28 G perpendicular to an electric field of magnitude 0.43 kV/m. What energy must electrons have to pass through undeflected
An electron is a subatomic particle (m = 9.11 10-31 kg) that is subject to electric forces. Find the magnitudes of the net force acting on the electron
upstream of a normal shock in air the pressure is 14.7 psia and the temperature is 528r. downstream of the shock the
question1a hotel elevator ascends 160 with a utmost speed of 4.9. its acceleration and deceleration both have a
After being accelerated to a speed of 1.76×105m/s , the particle enters a uniform magnetic field of strength 0.800T and travels in a circle of radius 35.0cm, Find the ratio m/q for this particle
A skier of mass 113 kilogram travels down a frictionless ski trail. determine the work done by gravity on the skier
a explain the function of the activator added in trace quantities to many inorganic scintillators. why are activators
A light beam travels at 1.94×108 in quartz. The wavelength of the light in quartz is 355. What is the index of refraction of quartz at this wavelength
An object is placed 24.0 cm to the left of a diverging lens(f = -5.89 cm). A concave mirror (f = 16.8 cm) isplaced 36.7 cm to the right of the lens to form an image of thefirst image formed by the lens. Find the final image distance,measured relative..
An airplane, diving at an angle of 48º with the vertical, release a projective at an altitude of 830m. What was the vertical component of its velocity
A box of mass 8.0 kilogram is accelerated from rest across a floor at a rate of 3.0 m/s for 6.0 s. Estimate what is the net work done on the box
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