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Two ice skaters, with masses of 30 kilogram and 75 kilogram, are at the center of a 30 meter diameter circular rink. The skaters push off against each other and glide to opposite edges of the rink.
If the heavier skater reaches the edge in 30 second, find how long does the lighter skater take to reach the edge?
q1. a krypton laser produces the cylindrical red laser beam 2.0mm in diameter with 2.0w of power. what is the light
A certain sample of gas has a volume of 20.00 dm3 at 0°C and 1.000 atm. A plot of the experimental data of its volume against the Celsius temperature, ?, at constant p, gives a straight line of slope 0.0741 dm3 (°C)?1. From these data alone (without ..
What is the wavelength of the waves emitted by source? What is the difference in frequency between the directly radiated waves and the waves reflected from a whale traveling straight toward the ship at 4.95 ? Assume that the ship is at rest in the..
A car is stopped at a traffic light. When the light turns green it accelerates at 2.5 m/s2 for 16 seconds. How many seconds does it take from start to stop
Two beams of 1keV neutrons intersect at an angle of 30o. One beam has a neutron density of 1×106 neutrons/cm3. The other beam has a neutron density of 3×106 neutrons/cm3
A water skier has a mass of 73 kg. Find the magnitude of the net force acting on the skier when she is accelerated from rest to a speed of 13 m/s in 9.4 s
A 100kg elevator starts from rest. It moves upward for 4s with constant acceleration until it reaches its crusing speed of 2 m/s. What is the average power of the elevator during this time interval
The parachute on a race car of weight 8130 N opens at the end of a quarter mile run when the car is traveling at 30.7 m/s. What total retarding force must be supplied by the parachute
An astronomical telescope has an angular magnification of -144 and uses an objective with a focal length of 62.6 centimeter. Determine what is the focal length of the eyepiece
A major artery with a cross-sectional area of 1.00cm2 branches into 18 smaller arteries, By what factor is the average velocity of the blood reduced when it passes into these branches
An experiment was performed where a quartz-iodine lamp was used to measure the photocurrent in microamperes in intervals of 10 nm from 400 nm to 900 nm for the voltage settings of 60, 80, 100, and 120V.
On a cold day, 16000 J of heat leaks out of a house. The inside temperature is 20.0° C, and the outside temperature is -18° C. What is the increase in the entropy of the universe that this heat loss produces?
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