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A cannon is fired horizontally from atop a40.0 m tower. The cannonball travels 160 mhorizontally before it strikes the ground. With what velocity did the ball leave the muzzle?
A village maintains a large tank with an open top, containing water for emergencies. Calculate the friction force exerted by the nozzle on the stopper
X-rays are scattered from a target at an angle of 15.2° with the direction of the incident beam. Find the wavelength shift of the scattered x-rays
A portable x-ray unit has a step-up transsformer, the 120 V input of which is transformed to the 100kV output needed by the x-ray tubr, what is the number of loops in the secondary
Two point-source loudspeakers are a certain distance apart, and a person stands 12.0 m in front of one of them on a line perpendicular to the baseline of the speakers. If the speakers emit identical 1000.0-Hz tones, what is their minimum nonzero s..
The nucleus of an atom consists of protons and neutrons (no electrons). A nucleus of a carbon-12 isotope contains six protons and six neutrons, while a nitrogen-14 nucleus comprises seven protons and seven neutrons.
A uniform rod of mass 2.55×10?2kg and length 0.440m rotates in a horizontal plane about a fixed axis through its center, What is the angular speed of the system at the instant when the rings reach the ends of the rod
A force in the negative direction of an x axis is applied for 34 ms to a 0.40 kg ball initially moving at 16 m/s in the positive direction of the axis. What is the ball's speed just after the force is applied
A farsighted man uses eyeglasses with a refractive power of 3.57 diopters. Wearing the glasses 0.026 m from his eyes, What is the correct contact lens prescription
an aluminum-alloy rod has a length of 10.008 cm at 16.400degc and a length of 10.020 cm at the boiling point of water.a
question1a cargo plane is flying horizontally at a height of 10.2 km with a speed of 970 kmh when a large crate falls
The G string on a violin has a fundamental frequency of 196Hz. It is 32.5 cm long and has a massof 0.500 g. what is the effective length of her string
Scientist develop a new heat lamp to keep chicks warm in an incubator. It has a conversion efficiency of 6.5% of its input to radiant energy. how much radiant power does it output
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