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What are (a) the work done by the rope's force, (b) the increase in thermal energy of the block-floor system, and (c) the coefficient of kinetic friction between the block and floor
A series of object are being rotated. The same net torque is being applied to each object. Rank the object in order of the resultant angular acceleration (1=lowest).
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.
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.
To increase the rate at which objects can be separated from solution, it is useful to make the centrifuge's speed as large as possible. If you want to design a centrifuge of diameter 1.6 m to have a
What is the net average force (magnitude and direction) that acts on her when she is in the water?
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 = 14.0 Ohm 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 mag
A light ray strikes this material (from air) at an angle of 34.3° with respect to the normal of the surface. Calculate the angle of the reflected ray (in degrees).
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/s
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
Sunlight strikes a piece of crown glass at an angle of incidence of 37.4o. Calculate the difference in the angle of refraction between a orange (610 nm) and a blue (470 nm) ray within the glass. The
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
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.
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. How high above its original position (spring compressed) will t
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
The wingspan (tip-to-tip) of a Boeing 747 jetliner is 59 m. The plane is flying horizontally at a speed of 300 m/s. The vertical component of the earth's magnetic field is 5.0 x 10-6 T. Find the emf