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A grasshopper hops along a level road. On each hop, the grasshopper launches itself at angle θ0=45° and achieves a range R = 0.82m .What is the average horizontal speed of the grasshopper as it hops along the road? Assume that the time spent on the ground between hops is negligible.
A 150-W lamp is placed into a 120-V AC outlet. What is the resistance of the lamp
a train is traveling at 30.0 relative to the ground in still air. the frequency of the note emitted by the train
A 96 kg man walks along a 50 kg horizontal plank which is 4 m long. The plank is attached to a hinge mounted to one wall, and the far end is supported by a vertical wire which is attached to an anchor in the ceiling. The wire can just barely support ..
Two masses of 27 kg and 18 kg are suspended by a pulley that has a radius of 12 cm and a mass of 9 kg, Determine the speeds of the two masses as they pass each other
There is a uniform charge distribution of ?= 7.90 * 10^-8 C/m along a thin wire of length l=5.58 cm. Find the magnitude of the electric field at the center of the semicircle
Wile. E. Cayote runs full-speed into a bank vault just as the door is closing. What was the doors angular speed right before the collision
Superman leaps in front of Lois Lane to save her from a volley of bullets. In a 1-minute interval, an automatic weapon fires 152 bullets, Find the average force exerted on Superman's chest
When the temperature of a coin is raised by 83.1 C°, the coin's diameter increases by 2.60 x 10-5 m. If the original diameter is 1.61 x 10-2 m, find the coefficient of linear expansion.
The current in a series circuit is 24.0 A. When an additional 22.0-? resistor is inserted in series, the current drops to 16.2 A. What is the resistance in the original circuit
From the Bohr energy levels calculate the x-ray energy for an electron transition from n=3 to n=2 in Calcium? Find how much energy would have to be transferred to an electron in the n=2 level to raise it to the n=3 level
consider a hot-air balloon. the deflated balloon gondola and 2 passengers have a combined mass of 315 kg. when inflated
There are two parallel straight wires with the length of 40 cm long and they are separated by 5 cm. what is the magnetic force on the right side wire
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