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Fuel aboard a rocket has a density of 2870 kg/m^3 and is ejected with a speed of 2650 m/s. if the engine is to provide a thrust of 1.21 x 10^6 N, what volume of fuel must be burned per second? Answer in units of m^3/s.
The bungee cord acts just like a coil extension spring with constant k = 4 lbf/ft and its unstretched length is L= 6 ft. At first the cord is loosely dangling but then becomes taut and goes into tension as soon as the skaters
A 2.74-nF parallel-plate capacitor is charged to an initial potential difference ?Vi = 100 V and is then isolated. The dielectric material between the plates is porcelain, with a dielectric constant of 6. (a) How much work is required to withdraw the..
A rock falls off the back bumper of a truck which is traveling at 26.8 m/s. The rock hits the ground 0.387 seconds after it leaves the bumper. How high above the road is the trucks bumper
Two particles, one with charge -7.13 %u03BCC and one with charge 7.75 %u03BCC, are 3.59 centimeters apart. What is the magnitude of the force that one particle exerts on the other
A 2.40 H coil with a resistance of 3.95×10^2 Ohm is in series with a 4.86×10^3 Ohm resistor. What is the peak value of the potential difference across the coil
A 12 kg piece of zinc at 65C is placed in a container of water. The water had a mass of 20 kg and a temperature of 12C before the zinc was added. What is the final temperature of water and zinc
If the contact time between bat and ball is 2.80×10?3s , calculate the average force between the ball and bat during contact
The allowed energies of a simple atom are 0.0 eV, 4.5 eV, and 7.0 eV. What is the minimum speed the electron could have after the collision
Positive point-charges of +36.0 mC (Micro C) are fixed at two of the vertices of an equilateral triangle with sides of 3.30 m, located in vacuum. Determine the magnitude of the E-field at the third vertex
A student decides to move a box of books into her dormitory room by pulling on a rope attached to the box, determine acceleration of the box
A woman at an airport is towing her 20.5 kg suitcase at constant speed by pulling on a strap at an angle of ? above the horizontal. What normal force does the ground exert on the suitcase
A 1200 kg car is traveling at 3.00 m/s and strikes a wall. The 1200 kg car bounces off the wall with a velocity of 4.00 m/s. then the average force on the car is
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