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Assuming such a plant delivers 1 GW of power, how many cubic feet of natural gas would be needed to run the plant for a year?
How much heat flows through the wall in a 6.9 hour period when the average inside and outside temperature are, respectively, 25 degrees C and 2 degrees C?
How many cells, each one having an open circuit Emf of 4.5 volts and an internal resistance of 0.5 ohms, are needed to supply current of 1.421 amperes to a resistor of 3 ohms if the cells are conne
A bullet with a mass of 4.0 g and a speed of 712 m/s is fired at a block of wood with a mass of 0.083 kg. What is the speed of the bullet when it exits the block?
A rifle bullet with a mass of 11.5 g traveling toward the right at 282 m/s strikes a large bag of sand and penetrates it to a depth of 21.0 cm. Determine the magnitude and direction of the friction
What wavelength of visible light (between 380 nm and 750 nm) would produce a dark fringe at the identical location on the screen?
A guitar string is 75 cm long and has a mass of 3.6 g. From the bridge to the support post (= L) is 60 cm, and the string is under a tension of 558 N. What is the frequency of the fundamental?
Assuming that the vaulter's horizontal component of velocity over the bar is 1.0 m/s and disregarding air resistance, how high was the jump?
The index of refraction of the core of a piece of fiber optic cable is 1.72. If the index of the surrounding cladding is 1.41, what is the critical angle for total internal reflection for a light ra
A ranger in a national park is driving at 34 km/h when a deer jumps onto the road 51 m ahead of the vehicle. After a reaction time of t s, the ranger applies the brakes to produce an acceleration o
A ray in glass arrives at the glass-water interface at an angle of 48° with the normal. The refracted ray, in water, makes a 72° angle with the normal. The index of refraction of water is 1.
A shipping container is hauled up a roller ramp that is effectively frictionless at a constant speed of 2.10 m/s by a 2250 N force that is parallel to the ramp. If the ramp is at a 24.6° inclin
How long would it take you to cover the 97 m length of the walkway if, once you get on the walkway, you immediately turn around and start walking in the opposite direction with a speed of 1.5 m/s r
The truck slows down uniformly with an acceleration of -5.60 m/s2 for 4.20 s, making skid marks 62.4 m long that end at the tree. With what speed does the truck then strike the tree?
Four identical masses of mass 500 {rm kg} each are placed at the corners of a square whose side lengths are 10.0 {rm cm}. What is the magnitude of the net gravitational force on one of the masses, due
Assume that each person is about the same distance from the center of the field and can generate the same level of sound intensity. How many people are at the game?
Suppose that the two speakers in the figure are separated by 2.50 m and are vibrating exactly out of phase at a frequency of 429 Hz. The speed of sound is 343 m/s. Does the observer at C observe co
A muscle builder holds the ends of a massless rope. At the center of the rope, a ball is hung as shown. The tension force in the rope is T = 100N. What is the mass of the ball if the angle in the d
Find the location of the image that this light produces in the concave mirror. Specify this distance relative to the concave mirror.
A 50.0 ball of clay traveling east at 2.00 collides and sticks together with a 60.0 ball of clay traveling north at 7.50 . What is the speed of the resulting ball of clay?
A 23 {rm kg} kg child goes down a straight slide inclined 38{rm ^circ} above horizontal. The child is acted on by his weight, the normal force from the slide, kinetic friction. How large is the nor
How far apart are the adjacent nodes? What is the wavelength of the two traveling waves that form this pattern?
If the source voltage has an amplitude of 12.0 V, R = 7.40 , and the speaker is equivalent to a resistance of 10.4 , what is the time-averaged power is transferred to it?
A 45-m length of wire is stretched horizontally between two vertical posts. The wire carries a current of 69 A and experiences a magnetic force of 0.15 N. Find the magnitude of the earth's magnetic
North American electrical outlet (ΔVrms = 120 V, f = 60.0 Hz). Assuming the energy stored in the capacitor is zero at t = 0, determine the magnitude of the current in the wires at t= 1/179s.