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a) A solid block is suspended from a spring scale.When the block is in air the scale reads 35.9 N, when immersed inseawater the scale reads 30.3 N, and when immersed in oil the scalereads 30.9 N. What is the density of the block?
b) What is the density of the oil?
A 97.0-kg bungee jumper steps off a bridge with a light bungee cord tied to her and to the bridge. The unstretched length of the cord is 12.0 m. The jumper reaches reaches the bottom of her motion 36.0 m below the bridge before bouncing back. We w..
A 70.0 kg football player leaps straight up into the air (with no horizontal velocity) to catch a pass. If the ball was moving horizontally when it was caught, how fast was the ball travelling
A solenoid contains 780 coils of very thin wire evenly wrapped over a length of 17.5cm . Each coil is 2.50cm in diameter. what is the magnetic field at its center
Photons of wavelength 430 nm are incident on a metal. What is the work function of the metal
A thin, square, conducting plate 51.5 cm on a side lies in the xy plane. A total charge of 4.25 10-8 C is placed on the plate. Find the charge density on each face of the plate
An astronaut on the planet Vimrom IV finds that she can junp a maximum horizontal distance of 13.0 m if her initial speed is 4.90 m/s. what is the maximum height about the ground reached by the astronaut
A certain car battery with a 12.0 V emf has an initial charge of 115 A·h. Assuming that the potential across the terminals stays constant until the battery is completely discharged, for how various hours can it deliver energy at the rate of 110 W.
What is the speed of the center of mass
An automobile tire has a volume of 0.0185 m3. If the pressure in the tire is 500 kPa and the temperature is 298 K, how many molecules are there inside the tire
Black smokers are hot volcanic vents that emit smoke deep in the ocean floor. Many of them teem with exotic creatures, and some biologists think that life on earth may have begun around such vents.
soap bubble (n = 1.40) having a wall thickness of 130 nm is floating in air. What is the wavelength of the visible light that is most strongly reflected
A railroad car with a mass of 20,000 kg rolls into a second stationary car with a mass of 40,000 kg. How fast was the first car moving before the collision
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