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ball A is dropped (starting at rest) from the top of a buildingof heighth at the sameinstant that ball B is thrown vertically upward from the ground. When the balls collide, they are moving in opposite directions, and the speed of A is twice the speed of B. At what height does the collision occur?
Atomic nuclei have a typical density of about 10^(17) kg/m^3. The density of liquid mercury is roughly 10^(4) kg/m^3. Approximately what fraction of the volume of liquid mercury is empty space between mercury nuclei?
A positively charged particle of mass 6.80 10-8 kg is traveling due east with a speed of 25 m/s and enters a 0.32-T uniform magnetic field. What is the magnitude of the magnetic force acting on the particle
Light of wavelength 630 nm passes through a grating and then onto a screen located several meters from the grating. Determine the wavelength of the second source
Suppose the temperature of 4.67 L of ideal gas drops from 354 K to 275 K. Find the number of moles of gas
Three 1kg masses are at the vertices of an equilateral triangle of sides 10 cm. determine the location of the center of mass (x,y)
A child complains that her milk is too hot. It is indeed too hot at 90o C. what is the temperature of the mixture
The temperature of the surface of a certain star is 7500K. Most hydrogen atoms at the surface of star are in the electronic ground state. What is the approximate fraction of hydrogen atoms that are in the first excited state (and therefore could e..
Assuming the acceleration is constant during each time interval (but not necessarily the same in both intervals), illustrate what distance does the shuttle travel during the interval from 8.00s to 1.00min ?
A pump uses a piston of 15 cm diameter which moves 2 cm/s. What is the fluid velocity of a tube 3mm in diameter
A dynamite blast at a quarry launches a rock straight upward, and 2s later it is rising at a rate of 15m/s. assume air resistance has no effect on the rock, analyse its speed (a) at launch and (b) 5s after launch.
In the lungs there are tiny sacs of air that are called alveoli. An oxygen molecule (mass = 5.30 x 10-26 kg) is trapped within a sac, and the uncertainty in its position is 0.140mm. What is the minimum improbability in the velocity of this oxygen ..
A sailboat race course consists of four legs, defined by the displacement vectors , , , and , as the drawing indicates. find the distance of the fourth leg and the angle
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