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The cross-sectional area of region A in the pipe is 1.05m^2, and the cross-sectional area of region B in the pipe is 0.740m^2. What is the speed of the water in region A of the pipe
A runner travels 2 km north, then 1 km west, then 1 km north, then 3 km east. The run took 45 minutes. What was the total path length of the run
The pendulum pictured above has a length of 15.0 cm when it is displaced to the right of the peg, Determine the period for this pendulum close to the surface of the Earth
A metal wire of resistance 2.20 multiply.gif 10-8 omegacap.gif is cut into four equal pieces that are then connected side by side to form a new wire the length of which is equal to one-fourth the or
Assuming that the ram spring is oriented vertically and is still compressed by 1.17 10-2 m when the downward-moving ram hits the staple, find the speed of the ram at the instant of contact
A small ball is attached to one end of a spring that has an unstrained length of 0.204 m. The spring is held by the other end, What is the maximum acceleration of the eardrum
The threshold intensity for a human eye to sense the presence of light is 50 photons falling on the retina within a period of 0.1 s. Estimate how far away the star can be away
Two photons have different frequencies f1 and f2 . If the ratio of their momenta is 22.5, what is the ratio of their frequencies
The work function of an element is 3.2 eV. Photons of a certain energy are found to eject electrons with a kinetic energy of 2 eV. What is the speed of the ejected electrons
An FM radio station transmits at a frequency of 80 MHz and a total power of 65 kW. How many photons does this station emit each second
One mole of an ideal diatomic gas is expanded at constant temperature from a pressure of two atmospheres, What are the final temperature and pressure of the gas
Suppose two highly precise, identical clocks are synchronized and one clock is placed on the North Pole, how much will the clocks differ in time
One thousand kilocalories of heat are added to three moles of a monatomic ideal gas as it expands, What was the temperature change for this gas
Given an ordinary cylindrical glass with a volume of one half liter and filled completely to the top with water at room temperature (20C), What would be the vapor pressure for this fluid
An object is initially placed on the optical axis 21.2 cm to the left of a convex lens that has a focal length of 13.7 cm. what is the new image distance
A camera has a lens with a focal length of 25.6 cm. how far from the film should the lens be placed
A space vehicle is traveling at 3760 km/h relative to Earth when the exhausted rocket motor is disengaged, What is the speed (in km/h) of the command module relative to Earth just after the separation
The electric potential at a position located a distance of 18.0 mm from a positive point charge of 7.60×10-9C, Calculate the value of the second charge
To finance her community college education, Joanna takes out a Stafford loan for $4500. How much will she pay
A sound wave of frequency 171 Hz has an intensity of 3.29 ?W/m2. What is the amplitude of the air oscillations caused by this wave
An 83 kg fullback moving east with a speed of 5.4 m/s is tackled by a 96 kg opponent running west at 3.8 m/s, find the velocity of the players immediately after the tackle
An object (it could be the crown that Archimedes had studied) made of gold and copper has a mass of 5.00 kg. determine the the volume percentage of each metal
A bacterium (mass = 2 × 10-15 kg) in the blood is moving at 0.28 m/s. What is the de Broglie wavelegth of this bacterium
A photon of red light (wavelength = 710 nm) and a Ping-Pong ball (mass = 2.10 × 10-3 kg) have the same momentum. At what speed is the ball moving
A golf ball strikes a hard, smooth floor at an angle of 24.7 ° and, as the drawing shows, rebounds at the same angle. compute the magnitude of the impulse applied to the golf ball