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A rocket, which is in deep space and initially at rest relative to an inertial reference frame, has a mass of 84.1 x 105 kg, of which 6.63 x 105 kg is fuel. The rocket engine is then fired for 220 s, during which fuel is consumed at the rate of 470 kg/s. The speed of the exhaust products relative to the rocket is 3.69 km/s.
(a) What is the rocket's thrust? After the 220 s firing, what are
(b) the mass and
(c) the speed of the rocket?
A heart defibrillator delivering 400 J of energy by discharging a capacitor initially at 10,000 V has a capacitance of 8.00 µF, What is the voltage of the second defibrillator
Visualize the one cubic centimeter as formed by stacking up identical cubes, with one copper atom at the center of each. Determine the volume of each cube.
A 1.5-V dry cell can be tested by connecting it to a low-resistance ammeter. It should be able to supply at least 22 A. What is the internal resistance of the cell
A 55g horizontal metal bar, 15cm long, is free to slide up and down between two tall, vertical metal rods that are 15cm apart. What is the terminal speed at which the bar falls
The brakes are applied to a car traveling on a dry, level highway. A typical value for the magnitude of the car's acceleration is 4.55 m/s2. how long does it take to stop and how far does it travel
A 100kg astronaut carrying a 1kg ball as she flies past a space station with a velocity of 3/5. what is her mass after throwing the ball
Determine out the magnitude of the average force that the water exerts on the diver. This force is neoconservative.
A 6.2-m radius playground merry-go-round with a moment of inertia of 2400 kg·m2 is rotating freely with an angular speed of 1.5 rad/s. What is the angular speed of the merry-go-round right after the two people have stepped on
A 200-g mass resting on a horizontal frictionless surface is attached to a spring of spring constant 35 N/m. What is the angular frequency of the oscillations
A charge Q is located inside a rectangular box. The electric flux through each of the six surfaces of the box is, What is Q
Two charges q1 = 6 µC, q2 = -49 µC, are L = 19 cm apart. A third charge is to be placed on the line between the two charges. How far from q1 should the third charge be placed so that the net electric force on the third charge is minimized?
question1a block with mass m 5.3 kg is attached to 2 springs with spring constants kleft 33.0 nm and kright 49.0 nm.
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