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A boy riding on the back of the truck throws a can of soda upward and catches the projectile at the same location on the truck bed, but 16.0 m farther down the road. In the frame of refe
He keeps his legs straight as he falls, but at the moment his feet touch the ground his knees begin to bend, and, treated as a particle, he moves an additional 0.76 m before coming to rest. Treating
Take the coefficient of linear expansion for aluminum to be alpha = 2.40×10-5/rm{^{circ}C}.What is the temperature T of the Concorde's skin in flight?
The average coefficient of variation (10%) of the Monte Carlo calculations. What factors make the MIRD method more accurate than the ICRP method?
A relaxed biceps muscle requires a force of 25.0 N for an elongation of 3.0 cm; the same muscle under maximum tension requires a force of 500 N for the same elongation. Find Young's modulus for the
Hubble's constant is about 22 km/s/million light-years, implying an age of about 14 billion years for the universe. If Hubble's constant were 11 km/s/million light-years, the age of the universe wou
A point charge = 5.00nC is located on the x-axis at = 2.00m , and a second point charge = -3.0nC is on the y-axis at = 1.00m . What is the total electric flux due to these two point charges through
What is the maximum speed of the disk without the block and penny sliding? The acceleration of gravity is 9.8 m/s2.
What is the coefficient of kinetic friction between the skier and the horizontal surface?
If 30 kcal of heat are supplied to 6 x 102 g of water at 21degrees C, what is the final temperature of the water?
A horizontal 797-N merry-go-round is a solid disk of radius 1.53 m, started from rest by a constant horizontal force of 50.4 N applied tangentially to the edge of the disk. Find the kinetic energy
Calculate the magnitude of the force between a gold nucleus and an electron in an orbit with radius 4.49 10-12 m around the nucleus. The gold nucleus has a charge of +79e.
A man weighing 710 and a woman weighing 430 have the same momentum. What is the ratio of the man's kinetic energy to that of the woman?
Tarzan swings on a 33.0 m long vine initially inclined at an angle of 37.0° with the vertical. (a) What is his speed at the bottom of the swing if he starts from rest?
A 20kg floodlight in a park is supported at the end of a horizontal beam of negligible mass that is hinged to a pole. A cable at an angle of 30 degrees with the beam supports the light. Find the te
A pair of narrow, parallel slits separated by a distance of 0.291 mm are illuminated by the green component from a mercury vapor lamp of wavelength 546.5 nm. The interference pattern is observed on
A uniform plank of length 6.00 m and mass 30.0 kg rests horizontally across two horizontal bars of a scaffold. The bars are 4.50 m apart, and 1.50 m of the plank hangs over one side of the scaffold.
A 1050 kg car carrying four 78 kg people travels over a rough "washboard" dirt road with corrugations 4.0 m apart which causes the car to bounce on its spring suspension. The car bounces with maxim
If a violin string transmits waves at 375 m/s and has 295 Hz as its fundamental frequency, what is the string's length?
A Carnot engine whose high-temperature reservoir is at 620 takes in 570 of heat at this temperature in each cycle and gives up 325 to the low-temperature reservoir. How much mechanical work does th
During a circus performance, a 71-kg human cannonball is shot out of an 17-m-long cannon. If the human cannonball spends 1.04 s in the cannon, determine the average net force exerted on him in the b
The temperature of the surface of a certain star is K. Most hydrogen atoms at the surface of the star are in the electronic ground state. What is the approximate fraction of the hydrogen atoms that
The electrons in a metal that produce electric currents behave approximately as molecules of an ideal gas. The mass of an electron is me = 9.109·10-31 kg. If the temperature of the metal is
If you looked at an incandescent light bulb and a neon sign through a diffraction grating, describe the differences you would observe in the spectra. Explain your reasoning.