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What is the magnitude of the apparent weight of a 83 kg astronaut 3300 km from the center of the Earth's Moon in a space vehicle moving at constant velocity?
A 1.70 MHz sound wave travels through a pregnant woman's abdomen and is reflected from the fetal heart wall of her unborn baby. Calculate the speed of the fetal heart wall at the instant this measur
The atomic mass of Neon is 20.2u, and that of krypton is 83.8u. The temperature of the krypton is 293K. What is the temperature of the neon?
What is the maximum height the arrow will attain? The target is at the height from which the arrow was shot. How far away is it?
A 11 g bullet is fired into a 11 kg wood block that is at rest on a wood table. The block, with the bullet embedded, slides 5.0 {rm cm} across the table. The coefficient of kinetic friction for wood
A 16.5 kg gold bar at 27.0°C is placed in a large, insulated 0.800 kg glass container at 15.0°C with 2.00 kg of water at 25.0°C. Calculate the final equilibrium temperature.
A 135-kg cannon at rest contains a 9.5-kg cannon ball. When fired, the cannon ball leaves the cannon with a speed of 115 m/s. What is the recoil speed of the cannon?
A spring (k =805N/m) is hanging from the ceiling of an elevator, and a 5.0-kg object is attached to the lower end. By how much does the spring stretch (relative to its unstrained length) when the el
The ratio of the number of excess electronic charges to the number of molecules on the surface of the tape is the fraction of the molecules on the surface of the tape that have gained (or lost) an e
The plates each have an area of 2 × 10-3 m2, and the spacing between the plates is 6 × 10-3 m. There is no dielectric between the plates. What is the capacitance of the capacitor?
Water flows through a horizontal tube of diameter 3.0 m that is joined to a second horizontal tube of diameter 2.2 . The pressure difference between the tubes is 8.0 kpa . Find the speed of flow in
What is the acceleration of a rising hot-air balloon if the ratio of the air density outside the balloon to that inside is 1.39? Neglect the mass of the balloon fabric and the basket.
A 361 kg mass is brought close to a second mass of 187 kg on a frictional surface with coefficient of friction 0.4. At what distance will the second mass be- gin to slide toward the first mass? The
Find the wavelength of the ultrasonic wave emitted by a bat if it has a frequency of 4.0x 10^4 Hz.
A rotating cylinder about 16 km long and 7.0 km in diameter is designed to be used as a space colony. With what angular speed must it rotate so that the residents on it will experience the same acce
Immediately after the collision, Gretzky is moving at 1.5 m/s in his original direction. You can ignore external horizontal forces applied by the ice to the skaters during the collision. Calculate
If a quantity of gas in a piston cylinder has a volume of 0.150 m3 and is initially at room temperature. what will be the temperature of the gas in degrees Celsius when it has expanded to a volume of
The 50 kg circular lead piston shown in the figure floats on 0.450 of compressed air. What is the piston height if the temperature is 30C?
A hotel elevator ascends 180 m with a maximum speed of 5.8 m/s. Its acceleration and deceleration both have a magnitude of 1.0 m/s2. (a) How far does the elevator move while accelerating to full spe
A constant force of 6.00 N acts on a 3.00 kg object for 10.0s. What are the changes in the object's momentum and velocity?
What temperature change is required to increase its volume by .8%?
A magnetic force moves along the negative z-axis. What is the direction of the magnetic force and what happens to the proton?
A person pulls a toboggan for a distance of 34.0 m along the snow with a rope directed 34.1 ° above the snow. The tension in the rope is 82.5 N. (a) How much work is done on the toboggan by the
A light plane is headed due south with a speed of 151 km/h relative to still air. After 1.06 hour, the pilot notices that they have covered only 127 km and their direction is not south but southeast
What is the greatest distance the foot of the ladder can be placed from the base of the wall without the ladder immediately slipping?