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A freezer has a temperature -29 oC. The air in the kitchen has a temperature of 27 oC. Since the heat insulation is not perfect, some heat flows into the freezer at a rate of 60 W. Find the power of the motor that is needed to maintain the temperature in the freezer.
How much water will flow in one minute through 200mm of a tube1.5mm in diameter if the pressure across the tube is 10cmHg
A car moving with an initial speed v collides with a second stationary car that is one-half as massive. Find the final speed of the second car
To make a simple microscope a student places two converging lenses of +20 D at opposite ends of a 34 cm long tube. What is the tube length of the microscope
An electric toy with a resistance of 2.25? is operated by a 4.70V battery. How much energy was delivered to the toy
How do I find the gravitation constant of G if M1 is 56.30, M2 is 72.20 Distance is 3.00m?
a small mailbag is released from a helicopter that is descending steadily at 3.00 ms.a after 5.00 s what is the speed
How fast is the top of the tree moving (in m/s) just before it hits the ground? Model the tree as straight, rigid rod, and ignore friction and air resistance.
The tires of a car make 51 revolutions as the car reduces its speed uniformly from 95km/h to 38km/h. What was the angular acceleration of the tires
A 40.0 ball of clay traveling east at 5.00 collides and sticks together with a 40.0 ball of clay traveling north at 3.00. What is the speed of the resulting ball of clay
a piano tuner hears a beat frequency of 6.2 hz when comparing the pianos a-string against a reference tuning fork
Three capacitors (3.90, 5.94, and 12.1 μF) are connected in series across a 55.0 V battery. Calculate the voltage across the 3.90 μF capacitor.
The rope and two masses are suspended from the ceiling of an elevator which is accelerating downward at 2.8 m/s^2. If each of the masses is 3.7 kg, find the tension in the rope connecting the two masses.
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