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Two tiny spheres have the same mass and carry charges of the same magnitude. The mass of each sphere is 3.03 × 10-6 kg. The gravitational force that each sphere exerts on the other is balanced
Please note that for water, the latent heat of fusion is Lf = 33.5 x 104 J/kg, and the latent heat of vaporization is Lv = 22.6 x 105 J/kg
Use Ampere's law to find the magnitude of the magnetic field at a distance ofr = 0.94 m from the wires when the currents are (a) in the same direction and (b) in opposite directions.
By how many wavelengths is it delayed, if its vacuum wavelength is 600 nm?
what percentage (0 to 100) of the light intensity is is passed by a combination of the first polarizer and a second which has its polarization axis 45ˆ with respect to the first?
Some weeks later, after cutting off various lengths of wire for use in repairs, the electrician finds that the spooled wire carries a 2.9-A current when the same battery is connected to it. What is
Now suppose that there is energy dissipation of 0.03 J per cycle of the spring-mass system. What is the average power input in watts required to maintain a steady oscillation?
We have a large and powerful spring whose stiffness is 2.3 105 N/m. How much must we compress the spring?
If the mass of the bob is m, the length of the string is d, and the angle at which it swings is theta, what is the speed v of the mass as it swings? Hint: Find the vertical and inward radial compone
It is pulled a little away from its resting position and when released oscillates freely about O. What is the period of the oscillation?
At what minimum period should it be rotating so when the mass is 1 m from the center friction will not hold it in place?
In the movie, 2001 : spaceodyssy, gravity is simulated in a cylindrical space station, radius 100 m by rotating at what speed(rad/s)? We measure the effective gravity right on the inner surface of t
A plastic rod that has been charged to -15.0 nC touches a metal sphere. Afterward, the rod's charge is -10.0 nC. What kind of charged particle was transferred between the rod and the sphere?
An object is placed in front of a converging lens in such a position that the lens (f = 11.0 cm) produces a real image located 19.9 cm from the lens. Then, with the object remaining in place, the le
The distance between an object and its image formed by a diverging lens is 8.70 cm. The focal length of the lens is -4.00 cm. Find (a) the image distance and (b) the object distance.
Two slits separated by 0.489 mm are illuminated with light of an unknown wavelength and an interference pattern is observed on a screen5.51 m away. The tenth bright line is 86.5 mm from the central
The engine of a small aircraft (m = 1400 kg including pilot) develops 180 hp. The airplane's speed is increased from 30 m/s to 45 m/s while it climbs from ground level to a height of 500 m in a tim
A mass m, is released from rest at a height, 4R and then travels along a frictionless track through a circular loop. The loop has a radius R. What is the normal force on the mass when it passes thro
At the bottom of the incline a horizontal surface has a coefficient of friction given by 0.33 and is 2.10 m long. Note: For full credit use work-energy principles to compute the following: (a) What
The spring constant is 25 N/cm for the spring. A 2.0 kg mass is pressed against the spring and then released and the entire system is placed on horizontal frictionless surface. (a) How much is the s
What is the maximum speed of the mass? What is the time when for the first time the length of the spring is 2.01.
A straight wire 20 cm long, carrying a current of 4 A, is in a uniform magnetic field of 0.6 T. What is the force on the wire when it is at an angle of 30° with respect to the field?
Air restistance is negligable. If the collision is completely inelastic,What is the total kinetic energy of the system after the collision?
Find an expression for the distance D that it lands from the base of the cliff.
In the lab, hydrogen atoms with n approximatly = 100 have been produced. What must be the pressure in these experiments?