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Consider an electrostatic generating machine that charges an isolated conducting sphere to 19.9 kV relative to a ground (0 V) that is far away. What is the smallest radius (in cm) that the conducting sphere could have, and not produce a discharge in the air surrounding it (which has a breakdown strength of 30 kV/cm)?
A 52-kg mountain climber, starting from rest climbs a vertical distance of 730m. At the top, she is again at rest. Find her efficiency as a heat engine
A series AC circuit contains a resistor, an inductor of 200 mH, a capacitor of 5.60 µF, and a source with ?Vmax = 240 V operating at 50.0 Hz. Calculate the inductive reactance
A boy of mass m runs with a speed v and jumps onto a sled on an icy pond. The sled was at rest before the boy jumped onto it. After the jump, What is the mass of the sled
Find the theoretical value for the acceleration for an object sliding down an incline plane. Ignore friction. Your answer should include a free-body-diagram as well as the sum-of-the forces equations.
A neon sign utilizes a step-up transformer to run at 6000 V on the 120 V from the wall outlet. how many turns does the secondary coil have
A race car starting from rest accelerates at a constant rate of 6.50 m/s2. What is the velocity of the car
Water is in the big beaker in the figure on the left. Scale 1 reads 96 newtons, scale 2 reads 531 newtons, and scale 3 reads 0 newtons. The hanging block has a density of 10 × 10^3 kg/m3. To nearest tenth of a newton what does scale 1 read after t..
The pilot of an airplane travelling 200 km/h wants to drop supplies to flood victims isolated on a patch of land 165m below. The supplies should be dropped how various seconds before plane is directly overhead.
An oscillator with a natural frequency of 480 Hz is driven by a 540 Hz sinusoidal signal. At what frequency does it oscillate
a skateboarder starts up a 1.0--high 30 ramp at a speed of 5.1 . the skateboard wheels roll without friction. how far
A series AC circuit contains a resistor, an inductor of 240 mH, a capacitor of 4.80 µF, and a source with ?Vmax = 240 V operating at 50.0 Hz. Calculate the capacitive reactance
Using the Bohr model what is the radius of the electron orbit in the Hydrogen atom when the electron is in the n = 2 state, What is the energy of the Hydrogen atom
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