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A person who weighs 641 N is riding a 94.0 N mountain bike. Suppose the entire weight of the rider and bike is supported equally by the two tires. If the gauge pressure in each tire is 7.50E+5 Pa, w
An airtight box has a removable lid of area 1.34E-2 m2 and negligible weight. The box is taken up a mountain where the air pressure outside the box is 8.34E+4 Pa. The inside of the box is completely
Neutron stars consist only of neutrons and have unbelievably high densities. A typical mass and radius for a neutron star might be 2.89E+28 kg and 1.08E+3 m. Calculate the density of such a star.
The angular velocity, omega, of the system is 1.1 rad/s when the student is at the rim. Find omega when the student is 2.73m from the center.
Light of wavelength 600 nm in air goes into a medium where the index of refraction is 1.73. What is the frequency of this light in the medium?
The human body normally produces about 2 X 10^6 red blood cells per second. A. Use scientific notation to express how many red blood cells your body produces in one day.
If you want to design a centrifuge of diameter 1.6 m to have a force of 129,000 times the force of the Earth's gravity, what is the speed of the outer edge of the centrifuge? Such a device is called
At a time of 1.60 s after she enters the water, her speed is reduced to 1.50 m/s. What is the net average force (magnitude and direction) that acts on her when she is in the water?
A single square loop of wire 23.7 cm on a side is placed with its face parallel to the magnetic field between the pole pieces of a large magnet (which is another way of saying the vector normal to t
There is a uniform magnetic field present, given by B=0.003 i + 0.004 j + 0.002 k, where i,j,k are the unit vectors along the cartesian coordinate axes in units of Tesla. Calculate the y-component o
A 1.10m long straight wire has a resistance R = 14.0Ohm and is connected to a 3.00V battery. The wire is located in a uniform magnetic field B directed perpendicular to the wire. Calculate the magni
Assume the barrel is initially at rest and that its moment of inertia can be approximated as a hollow cylinder rotating about its axis: Icylinder = MR2. Your answer should be given to a tenth of a m/
Two uniform solid cylinders, each rotating about its central (longitudinal) axis, have the same mass of 4.90 kg and rotate with the same angular speed of 264 rad/s, but they differ in radius. What i
A bowling ball has a mass of 7.2 kg and radius of 0.11m. A billiard ball has a mass of 0.38 kg and a radius of 0.028 m. Both are treated as a sphere. What is the magnitude of the max gravitational f
What is the average force imparted to the two gloved hands during the catches of the experienced catcher?
For best uniformity of the magnetic field what should be the veritcal separation of the coils.
A beam of monochromatic light is incident on a single slit of width 0.620 mm. A diffraction pattern forms on a wall 1.35 m beyond the slit. The distance between the positions of zero intensity on bo
A bullet is fired with a speed of 736 m/s. The speed of sound in the air is 343 m/s. Find the angle made by the shock cone with the line of motion of the bullet.
An average neutron star has approximately the same mass as the Sun, but is compressed into a sphere of radius roughly 10 km. What would be the approximate mass of a teaspoonful of matter that dense?
A hoop and a disk, both of 0.38- m radius and 3.0- kg mass, are released from the top of an inclined plane 3.3 m high and 9.0 m long. What is the speed of each when it reaches the bottom? Assume tha
It is noted that the block-spring system, when compressed 5.0 cm and released, stretches out 2.3 cm beyond the equilibrium position before stopping and turning back. What is the coefficient of kinet
You shoot a ball of mass 50g into a pendulum arm of mass 200g, whose center of mass rises 15cm. Calculate the initial velocity of ball.
Two planets have the same mass. Each planet has a constant density, but the density of planet 2 is three times as high as that of planet 1. Identical objects of mass m are placed on the surfaces of
A vertical spring (ignore its mass), whose spring stiffness constant is 820 N/m, is attached to a table and is compressed down 0.180 m. (a) What upward speed can it give to a 0.300 kg ball when rele
A distant galaxy emits light that has a wavelength of 550.5 nm. On earth, the wavelength of this light is measured to be 450.8 nm. (a) Decide whether this galaxy is approaching or receding from the