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A string is clamped at both ends and tensioned until its fundamental vibration frequency is 95Hz. what is the lowest frequency at which it will vibrate
Two of the same capacitors C are wired in series. When they are connected to a +30V battery, How much energy each capacitor stores
A weather balloon filled with helium gas has a volume of 279 m3, What is the new volume of the balloon
A spherical balloon containing oxygen gas has a radius of 13.2 cm. what is the mass of oxygen in the balloon
Consider a balloon containing nitrogen molecules at room temperature (20°C) and atmospheric pressure. what is the number of molecules in the balloon
A typical incandescent lightbulb has a filament temperature of approximately 3191 K. At what wavelength is the intensity of the emitted light highest
A coil formed by wrapping 45 turns of wire in the shape of a square is positioned in a magnetic field so that the normal to the plane of the coil, What is the total length of the wire
The left end of a long glass rod 6.00cm in diameter has a convex hemispherical surface 3.00cm in radius. obtain the refractive index of the liquid
A 250 g block of wood hangs from a light string 0.78 m long. The block is shot with a bullet of mass 4.2 g, what was the velocity of the bullet just before it hit the block
A particle with a positive charge q= 8.6x10^-6C and a mass m= 0.45g moves with velocity v = 8m/s parallel to a wall. Find the sign and magnitude of the magnetic field
A tungsten filament used in a flashlight bulb operates at 0.20 A and 3.0 V. find the temperature of the filament when the flashlight is on
The radii of curvature of the surfaces of a thin converging meniscus lens are R1 = 12.0cmand R2 = 28.0cm. Is the final image erect or inverted with respect to the original object
What is the range of wavelengths for FM radio (88 MHz to 108 MHz) and AM radio (535 kHz to 1700 kHz)? (answer: for FM: 2.78m to 3.4m, for AM: 176m to 561m)
The current amplitude in an inductor in a radio receiver is to be 250 microA when the voltage amplitude is 3.6V at a frequency of 1.60Hz. What inductive reactance and inductance is needed
The magnetic field inside an air filled solenoid 36cm long and 2cm in diameter is 0.8T. Approximately how much energy is stored in this field
A 2m3 balloon filled with helium at sea level climbs to 10,000 m. The temperature at sea-level is 20C, What is the volume of the balloon at 10,000 m
suppose that E = 50.0V , R = 210? and L = 0.140H . With switch S2 open, switch S1 is left closed until a constant current is established. Which point is at a higher potential
An L-C circuit containing an 83.0-mH inductor and a 1.70-nF capacitor oscillates with a maximum current of 0.730A.calculate the energy stored in the inductor after 2.50ms of oscillation
At its highest temperature, a space heater has a resistance of 15.5 ?, What is the average power output of the space heater
A typical wall outlet voltage is 120 volts in the United States. calculate the number of turns on the secondary coil of the adapter transformer
At some instant and location the electric field associated with an electromagnetic wave in vacuum has the strength 86.9 V/m. Find the magnetic field strength
A traveling sinusoidal electromagnetic wave in vacuum has an electric field amplitude of 57.1 V/m. Find the intensity of this wave and calculate the energy flowing during 16.9 s through an area of 0
Find the frequency in terahertz of visible light with a wavelength of 653 nm in vacuum.
Consider a makeup mirror that produces a magnification of 1.7 when a person's face is 12.5 cm away. What is the focal length of the makeup mirror in m
An astronaut who is repairing the outside of her spaceship accidently pushes away a 90.5-cm-long steel rod, What is the magnitude of the EMF, in millivolts, induced between the ends of the rod