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Blue whales apparently communicate with each other using sound of frequency 17.0 , which can be heard nearly 1000 away in the ocean. What is the wavelength of such a sound in seawater, where the speed of sound is 1538 ?
A Cepheid variable has been found to have a period of 22 days, from this its luminosity is determined to be 2.8 x 1029 W, calculate the distance to the Cepheid
You are assigned the design of a cylindrical, pressurized water tank for a future colony on Mars, Find the net downward force on the tank's flat bottom
A monkey shows symptoms of being under the influence of too much physics. Specifically, What is the final angular speed of the monkey's head
A 3.0 m tall, 64 cm diameter concrete column supports a 205,000 kg load. By how much is the column compressed
A heat engine extracts 50.0kJ of heat from the hot reservoir each cycle and exhausts 35.0kJ of heat. What is the thermal efficiency
If a 35.0 N·m torque on a wheel causes angular acceleration 20.0 rad/s2, what is the wheel's rotational inertia
A rectangular block of ice 9.00 m on each side and 0.7 m thick floats in sea water. The density of the sea water is 1025kg/m3. The density of ice is 919kg/m3. How high does the top of the ice block float above the water level.
A high-speed flywheel in a motor is spinning at 450 rpm when a power failure suddenly occurs. The flywheel has mass 37.0kg and diameter 71 cm. The power is off for 27.0s and during this time the flywheel slows due to friction in its axle bearings...
A 2.05 g ping-pong ball rubbed against a wool jacket acquires a net positive charge of 1.26 ?C. How many electrons were removed from the ping-pong ball
The current through a 1.5 H inductor changes from zero to 1mA in 5 us. How much is the absolute value of self-induced voltage
A steel cable is to support an elevator whose total (loaded) mass is not to exceed 3100 kg. calculate the diameter of cable required
0.45 kg of a metal at 90.°C is added to 0.40 kg of water at 20.0°C. If the final temperature of the mixture is 26.°C, what is the specific heat of the metal
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