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Brianne's heart is beating at 76.0 beats per minute. Calculate the frequency of her heart's oscillations in Hz
An object known to be made of copper (p=8.89 g/cm^3) and aluminum (p=2.7 g/cm^3) "weighs" 25 g in air but only 20 g in water. How much copper is in the object
a hydraulic jack has an in[put piston area of 2 cm^2 and an output piston area of 18 cm^2. What will be the pressure on the oil
A 15 kg box is being pushed across the floor at 1.7 m/s to the right. When the pushing force is removed, find the frictional force exerted on the box by the floor
One cubic meter of water flowing over Niagara Falls in New York drops 92.2 meters. how much heat energy would the water have
A lead bullet with a mass of 0.02 kg traveling at 209 m/s strikes an armor plate and comes to a stop. what is the temperature change
A 821 kg car is going 29 m/s and the driver has to slam on his brakes to prevent an accident. what is the change in temperature of the brake pads and rotors
A transparent oil with index of refraction 1.16 spills on the surface of water (index of refraction 1.33), determine the thickness of the oil slick
During a lunar eclipse, a picture of the moon (which has a diameter of 3.48×106 m and is 3.86×108m from the earth) is taken with a camera whose lens has a focal length of 305mm, What is
A cube with a side of 25.00 cm is immersed in a fluid. Knowing that the pressure at the top surface of the box is 109.4 kPa, find the density of the fluid
A hydrogen atom is in the 5d state. What is the magnitude of its orbital angular momentum
A solid rock, suspended in air by a spring scale, has a measured mass of 9.00 kg. What is the density of the rock
A block of wood has a density of 0.50 g/cm3 and a mass of 1.500 kg. What is the volume of oil that the wood displaces
The angle of incidence of a light beam in air onto a reflecting surface is continuously variable. find the index of refraction of the reflecting material
Tsunamis are deep ocean waves that usually result from the undersea earthquakes or landslides. What is the tsunami's wavelength
How much force is needed to increases the velocity of a 5000kg truck from 40 km/h to 70 km/h in 20 s on the horizontal road, What is the change of the total mechanical energy
a silver dollar of mass 200gm, and diameter 8cm, has a small hole punched through it at 2 cm from the center. the coin is initially at rest in a vertical plain with the hole directly under the cente
A body in free fall reaches the ground in 5 s. From what height in meters was it dropped
What force must be applied to 50 kg object to move it downward with acceleration 10 m/s^2 ? What is the direction of the applied force
nozzle of a hose is pointing straight up. the water rises to a height h above nozzle openig. how high does the water rise
A 10,000 kg railroad car is rolling at 2 m/s when a 4000 kg load of gravel is suddenly dumped in, What is the railroad car's speed
Calculate the gravitational force between Sun and Earth by using Newton's universal gravitation, Does this mean that everything on Earth is heavier at night
A 32.0 kg child slides down a long slide in a playground. She starts from rest at a height h1 of 21.00 m. Calculate the mechanical energy lost due to friction
An plane and pilot have a total mass of 168 kg. While executing a banked curve of radius 20 m at a speed of 12 m/s
500 mL of a liquid with a coefficient of volume expansion of 267x10-6/oC fills to the brim a container that has a coefficient of volume expansion of 99x10-6/oC. how much of the liquid will overflow