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A Physics student in lab is pushing a block, of mass 9.5 kg, on a rough surface, with a coefficient of static friction of 0.2. What is the force of friction that must be over come to move the block?
Jupiter emits radio waves and also visible light (reflected Sunlight). Which of the following statements about the light we detect from Jupiter is true.
An electron move with a speed of 8.0 × 106 meter per second in the positive x direction through a magnetic field of magnitude 0.025 T pointing 60 degree to the x axis in the xy plane. Determine the frequency of this helical motion
A length of aluminium wire is connected to a precision 10.00 V power supply, and at 20.0C the current through it is measured precisely to be 0.4212 A. determine the unknown temperature
A car radio draws 0.15 Amp of current in the auto's 12 Volt electrical system. Find how much electric power does the radio use
three forces act on a mass causing it to move from rest to the right a distance 4.94 m. if the forces at 48.41 at 0
Dan is gliding on his skateboard at 4.00m/s . He suddenly jumps backward off the skateboard, kicking the skateboard forward at 6.00m/s, How fast is Dan going as his feet hit the ground
A particular banana contains 385 mg of potassium, of which a small fraction is the radioactive isotope _19^40 text (K) (see Appendix B). Approximation the activity of this banana because of _19^40 text (K).
An entertainer, when performing a bubble trick, forms one bubble inside another. The surface tension of the bubble liquid is ?=0.04 N m-1. calculate the gauge pressure in the inner bubble
A rescue helicopter lifts a 85.3-kg person straight up by means of a cable. calculate how much work done by the persons weight
A string is stretched and fixed at both ends 426 cm apart. If the density of the string is 0.022 g/cm, and its tension is 441 N, what is the speed of the traveling waves
A woman finds the front windshield of her car covered with ice at -11.4 °C. Find how much heat in joules is required to melt the ice
A ball of mass 5.0 Kg is lifted off the floor a distance of 1.7 m. what is the kinetic energy of the ball just before it hits the floor? What is its velocity
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