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You are in charge of regulating the temperature of the swimming pool for the next Olympic games. The water in the pool fills a volume of 25 m x 50m x 2m and the water should be kept between 25 and 27 degrees Celsius. Over the past 2 weeks, there has been a heat wave and the temperature of the pool increased to 29 degrees Celsius. Your boss suggests that you put ice in the pool to cool it down. if you want to do this, how much ice ( in kg) will you need?
The mass of the Moon is 7.18X10^22 kg and radius is 1738 km. If your mass is 90 kg, what would be your weight (gravitational force of attraction) on the Moon
Arlene is to walk across a "high wire" strung horizontally betweentwo buildings 10.0m apart. what is the tension in the rope at this point
A skater with an initial speed of 7.10 m/s stops propelling himself and begins to coast across the ice, eventually coming to rest. How far will the skater travel before coming to rest
Solenoids produce magnetic fields that are relatively intense for the amount of current they carry. To make a direct comparison, Find the magnetic field at the center of the solenoid
Suppose that an electron is trapped within a small region and the uncertainty in its position is 7.20 multiply.gif 10-15 m, find the minimum uncertainty in the electron's momentum
the membrane that surrounds a certain type of living cell has a surface area of 7.3 x 10-9 m2 and a thickness of 1.9 x
A wire of initial length Lo and radius ro has measured resistance of 1.0 ?. The wire is drawn under tensile stress to a new uniform radius of r = 0.25ro. What is the new resistance of the wire
question1in an assured region of space there is uniform electric field e and uniform magnetic field b both directed
Two different electrical devices have the same power consumption, but one is meant to be operated on 120-V AC and the other on 240-V AC. What is the ratio of their currents
a passenger walks from one side of a ferry to the other as it approaches a dock. if the passengers velocity is 2.00 ms
An 8.70 kg block slides with an inital speed of 1.56 m/s down the ramp at an angle of 28.4 with the horizontal. The coefficient of kinetic friction between the block and the ramp is 0.62. Use energy conservation to find the distance the block slid..
a 146 g ball moving at -23 ms is hit by a bat. the ball moves in the opposite direction at 14 ms. how long did it
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