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The radius of the Earth's orbit is 1.50 multiply.gif 1011 m and that of Mercury is 5.81 multiply.gif 1010 m. What is the orbital period of this planet
A container at 25°C holds 0.50 moles of helium at a pressure of 2.5 atm. What is the volume of the container
In the bohr model of the hydrogen atom, an electron is the 6th excited state moves at a speed of 60km/s in a circular path having a radius of 2mm.
An iron bar 40 cm long is braised to a copper bar 40 cm long and of the same diameter. What is the temperature of the junction point
A laser emits a light beam with a power of 5 mW. How many photons per second does this laser emit
A small object with a mass of one gram carries a charge of 1µC and is suspended by a thread between the vertical plates of a parallel-plate capacitor submitted to a voltage of 1 kilo volts
The voltage across an air-filled parallel-plate capacitor is mesured to be 200 v. find the dielectric constant of the inserted material
Air at 25 oC blows over a heated steel plate with its surface maintained at 200 oC. Calculate the heat loss per hour from the top surface of the plate
What is the radius of a bobsled turn banked at 75.0° and taken at 30.0 m/s, assuming it is ideally banked
A dentist's mirror is placed 2.5 cm from a tooth. The enlarged image is located 6.1 cm behind the mirror. What kind of mirror (plane, concave, or convex) is being used
Suppose the horizontal velocity of the wind against a sail is 5.5 m/s parallel to its front surface and 3.3 m/s along its back surface. Calculate the approximate force on a square meter of sail in N
A thin film of glass (n = 1.48) floats on a liquid of n = 1.35 and is illuminated by light of ? = 600 nm incident from air above it. Find the minimum thickness of the glass
A wire is bent to form a circle whose diameter is 10cm. Find the maximum torque that the magnetic field can exert on the wire
A 2.83-kg book slides 1.17 m along a level surface. The coefficient of kinetic friction between book and surface is0.41. Find the work done by friction
X rays with initial wavelength 6.60×10?2nmundergo Compton scattering. What is the largest wavelength found in the scattered x rays
The cathode-ray tubes that generated the picture in early color televisions were sources of x rays. what are the shortest-wavelength x rays produced by the television
The bright yellow sodium line in the sodium spectrum is actually a pair of closely spaced lines at 589.0 nm and 589.6 nm. Find the angular separation between the two sodium lines in second order
A 1000 kg race car makes three and half laps around a circular race track with a 400m radius in 180 sec at a constant speed. determine the car's linear speed
A car with a mass of 1500 kg is traveking directly east at a slow speed of 1.20 mph and eleastically with a smaller car of mass of 1275 kg, Calculate the momenta of the cars before the collision
A potters wheel is a disk of mass 3.50kg and radius .450m and is spinning freely around a vertical axis through its center with an angular speed of 14.0rad/s. what is the angular speed of the wheel+
A solid ball of mass .30kg and radius .053m is rolling without slipping along a horizontal surface with a linear speed of 2.3m/s. obtain is its total Kinetic energy
A diatomic molecule is excited to its first rotational energy level, corresponding to J = 1. what is the angular speed of the molecule about its center of mass
Assume the distance between the protons in the H2 molecule is 7.50 multiply.gif 10-11 m. Find the energy of the second rotational state, with J = 2
A light beam is incident on a piece of zircon (n = 1.923) at the Brewster's angle. determine the value of Brewster's angle
In a Young's double-slit experiment, a set of parallel slits with a separation of 0.102 mm is illuminated by light having a wavelength of 585 nm, What is the difference in path lengths from the two