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A positive charge of +2.00 nC exerts an upward 0.200 N force on an unknown charge located 30.0 cm directly below it. Calculate the magnitude of the charge and enter the answer with proper sign for the charge in units C.
A satellite moves in a circular orbit around Earth at a speed of 5929 m/s. Estimate the period of the satellite orbit
What is the mass of a puppy that sits on the other piston and balances the person?
A telescope has a two ft mirror. How far apart in angle can the instrument distinguish two individual stars for blue (420 nm) light? How about for red (650 nm) light? The Very Large Array in New Mexico consists of a large number of radio telescopes a..
A giant wheel, 40 meter in diameter, is fitted with a cage and platform on which a man can stand. Evaluate what is the speed of the man
A projectile is fired with an initial speed of 36.7m/sat an angle of 42.1 above the horizontal on a long flat firing range. Decide the total time in the air. Decide the speed of the projectile 1.30s after firing. Decide the maximum height reached by ..
High-speed stroboscopic photographs show that the head of a 240-g golf club is traveling at 52 m/s just before it strikes a 46-g golf ball at rest on a tee. Find the speed of the golf ball just after impact
An open organ pipe and an organ pipe that is closed at one end both have lengths of 0.48m at 20 C
A 2kg block is moving to the right at 1.0m/s just before it strikes and sticks to a 1.0 kg block initially at rest
A 9.8-kg object oscillates at the end of a vertical spring that has the spring constant of 1.75 104 N/m. The effect of air resistance is represented by the damping coefficient b = 3.00 N•s/m.
When light of wavelength 350 nm falls on a potassium surface, electrons are emitted having a maximum kinetic energy when the stopping voltage, Vs = 1.30 V. Find Work function of potassium and The cut-off wavelength.
The image of an object, formed by a Plano-convex lens at a distance of 8 meter behind the lens, is real and is one-third the size of the object. Find the radius of the curved surface of the lens
An electron passes through a point 2.71 cm from a long straight wire as it moves at 36.3% of the speed of light perpendicularly toward the wire
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