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If a conducting sphere is to be charged to a potential of6100 V, what is the smallest possible radius of the sphere such that the electric field will not surpass the dielectric strength of air?
A 145 g baseball is dropped from a tree 9.0 m above the ground. With what speed would it hit the ground if air resistancecould be ignored
A thermos contains 159 cm3 of coffee at 93.7 °C. To cool the coffee, you drop two 13.2-g ice cubes into the thermos. The ice cubes are initially at 0 °C and melt completely. What is the final temperature of the coffee in degrees Celsius? Treat the..
A positive charge of 3.2×10-9 C is brought in from infinity to a point (2m,0), How much work did the electric field do
A mass of .500 kg is connected to a spring of spring constant 30 N/m. The oscillation begins by pulling the mass to the right to amplitude 0.40 m before release, what is the damping constant of the oscillation
A long jumper leaves the ground at an angle of 20.0o to the horizontal and at a speed of 11.0 m/s. How long does he take to reach maximum height
A pendulum hangs from an inclined wall. Suppose that this pendulum is released at an initial angle of 10 degrees and it bounces off the wall elastically when it reaches an angle of -5 degrees
A person's center of mass is easily found by having the person lie on a reaction board. find the distance from the woman's feet to her center of mass
A 15,000 kg F-18 (jet fighter) lands at 50 m/s on an aircraft carrier, its tail hook snags the cable to slow it down. The cable is attached to a spring with a spring constant of 62,000 N/m. How far does the spring stretch to stop the jet?
A beam of 6 MeV alpha particles scatters from a thin gold foil. What is the ratio of the number of alpha particles scattered to angles greater than 1° to the number scattered to angles greater than 3°
a slit 0.30 mm wide is illuminated by light of wavelength 426 nm. a diffraction pattern is seen on a screen 2.8 m from
Consider a concave mirror with a focal length of 18.90 cm. Find the location of the image when the object is 10.20 cm from the mirror. What is the magnification of the image? What is the radius of curvature of the mirror in cm? Is is virtual and u..
Observations of a certain galaxy show that stars at a distance of 16 pc from the center of the galaxy orbit a central supermassive black hole at a speed of 200 km/s
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