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Starting from rest, a 1.9 x 10-4 kilogram flea spring straight upward. While the flea is pushing off from the ground, the ground exerts an average upward force of 0.41 Newton on it. This force does1.8 x 10-4 Joule of work on the flea.
(a) Find the flea speed when it leaves the ground?
(b) Find how far upward does the flea move while it is pushing off? Neglect both the flea's weight and air resistance.
A 110 ball and a 250 ball are related by a 38--long, massless, rigid rod. The balls rotate about their center of mass at 150 what is the speed of the 110 ball.
A power line carrying a sinusoidally varying current with frequency f = 60 Hz and peak value I0 = 55 kA runs at a height of 7.0 m across a farmer’s land (Fig. 29–41). The farmer constructs a vertically oriented 2.0-m-high 10-turnrectangular wire coil..
The transmitting antenna for a radio station is 7.55 km fromyour house. The frequency of the electromagnetic wave broadcast bythis station is 531 kHz. The station builds a second transmittingantenna that broadcasts an identical electromagnetic wav..
q1. a 0.440-kg blue bead slides on a frictionless curved wire starting from rest at point where h 1.40 m. at point the
A tank contains benzene, which has index of refraction1.50. A dime is on the botton of the tank. What is the actual depth of the benzene
A mirror with a focal length of -10 cm is used to image an object15 cm away. What is the image distance and what type of imagewould this mirror produce. Draw a ray diagram as part of your answer.
A mass of 12.5 kg is hanging by a steel wire 1.11 m long and 1.03 mm in diameter. If the mass is pulled down slightly and released, what will be the frequency of the resulting oscillations
A 32g bullet is fired from a rifle at 380 m/s into a water bottle at a pointblank range. The bullet travels completely through the 12 cm long bottle, find the average force exerted by the water on the bullet
A 130 g copper bowl contains 240 g of water, both at 20.0°C. How much energy (in calories) is transferred to the water as heat
A space ship is moving toward the earth at a speed of 0.75 c when it launches two space probes at precisely the same time. Probe A is launched toward the earth at a speed of 0.8cas measured on the space ship. Probe B is launched away from the earth a..
A man stands on the roof of a 13.0 {\rm m}-tall building and throws a rock with a velocity of magnitude 30.0 {\rm m}/{\rm s} at an angle of 30.0^\circ above the horizontal. Calculate the magnitude of the velocity of the rock just before it strikes ..
Liquid helium is stored at its boiling-point temperature of 4.2 Kin a spherical container (r=0.30 meter). Find what mass of liquid helium boils away through a venting valve in 1 hour
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