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The weight of a block of metal is measured with a scale first in air, then in water. Find the specific gravity of the metal ( the ratio of the density of metal to the density of water). The tension of the block is measured 6.0N in air and 4.0N in water.
A cannon tilted upward at 26° fires a cannonball with a speed of 105 m/s. What is the component of the cannonball's velocity parallel to the ground
A 45kg figure skater is spinning on the toes of her skates at 1.2rev/s . Her arms are outstretched as far as they will go. What is her new rotation frequency, in revolutions per second
When two capacitors are connected in parallel their equivalent capacitance is 12 ?F. What is the capacitance of the smaller of the two capacitors
A soccer ball is kicked with an initial horizontal velocity of 18.0 m/s, find How far from where it was kicked will the ball land
A cube of mass m = 7.15 kg is placed on an inclined plane of mass M = 6.67 kg, which makes an angle ? = 48.30° with the horizontal. What is the normal force on the inclined plane from the table underneath it
q1. a 1040 kg car carrying four 80 kg people travels over a rough washboard dirt road with corrugations 2.0 m apart
A 2.0-kg piece of marble at 100 degree C is dropped into 1.5 kg of water at 1.0 degree C, What is the specific heat of the marble
all the data for this problem come from a conservative dialect of vegraveneto a romance language spoken in northern
An electric field given by = 7.4· - 4.4(y2 4.7)· pierces a Gaussian cube of edge length 4.0 m, What net charge (in Coulombs) is enclosed by the Gaussian cube
An X-ray tube is similar to a cathode-ray tube. Electrons are accelerated to high speeds at one end of the tube. What speed would this potential difference give to protons
The frequncy doubled output of a laser has a wavelength of 532nm. If each pulse of light has a total energy of 0.550J and the repetition rate of the laser is 30Hz, how many photons does the laser emit at 532 nm in 3 minutes
Deuterium is a heavy isotope of Hydrogen with a nucleus containing one proton and one neutron. In the Balmer series n=4 goes to n=2 line in a hydrogen spectrum had a nearby weak neighboring line. What is the separation of wavelength of these lines? (..
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