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The block, with the bullet embedded, slides 5.0 across the table. The coefficient of kinetic friction for wood sliding on wood is 0.20. What is the final speed of the bullet?
The clerk pulls with a force of 178.0 N at an angle of 24° with the horizontal. The box has a mass of 40 kg, and the coefficient of kinetic friction between the box and the floor is 0.45. Find t
The pilot of an airplane traveling 220 km/h wants to drop supplies to flood victims isolated on a patch of land 180 m below, the supplies should be dropped how many seconds before the plane is direc
A baseball pitcher throws a fastball at a speed of 47 m/s. The acceleration occurs as the pitcher holds the ball in his hand and moves it through an almost straight-line distance of 3.5 m. Calculate
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%?