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If the amount of lighting on the subject is unchanged, and the lens is set at f/5.6, what is the proper shutter speed at this setting?
On a certain game show, contestants spin a wheel when it is their turn. One contestant gives the wheel an initial angular speed of 3.40 rad/s. The angular acceleration of the wheel is -0.736 rad/s2.
If a ray of light traveling in the liquid has an angle of incidence of 32.5o at the interface with respect to the normal, what angle does the refracted ray in the air make with the normal?
The can warns against temperatures in excess of 50 degree Celsius. What is the maximum safe pressure for the can?
Uncompressed, the spring for an automobile suspension is 40cm long. It needs to be fitted into a space 33cm long. If the spring constant is 3.7 kN/m, how much work does a mechanic have to do to fit
Both flashes reach your eye at the same time. Your assistant is standing at x = 3.0km. If your assistant didn't see the flashes at the same time, what is the time difference between the two flashes?
A 140g arrow is shot vertically from a bow whose effective spring constant is 500 N/m. If the bow is drawn 60cm before shooting the arrow, to what height does the arrow rise?
What is the angular momentum of a 3.2 kg uniform cylindrical grinding wheel of radius 18 cm when rotating at 1500 rpm?
A large uniform solid disc has a mass of 50 kg with a 10 kg 0.75 m long uniform rod added radially from the dsics axis and extending to the outside edge of the disk. What is the rotational inerti
The wave has a wavelength of 4m, a frequency of 50Hz, and an amplitude of 3cm. What is the wave function for this wave?
The height of the top end of the slide is 4.5 meters above the lower end. What is the crates velocity at the bottom of the slide?
The firecracker explodes the box into two pieces, with masses of 1.0 kg and 3.0 kg. After the explotion the 1.0 kg piece is at rest. what is the speed of the 3.0 kg piece?
What is the frequency of the stationary siren as perceived by an observer in a car driving toward the ambulance at 25 m/s?
A 6 µC charge is found to move against a 9 kV potential difference. If the charge moves along an electric field line for a distance of 12 mm, what average force causes the motion? The electric
Object 1 has a temperature of 95° C and object 2 has a temperature of 35° C. What is the ratio of the net power emitted by object 1 to that radiated by object 2?
Work of 1500 J is done on an ideal gas, but the internal energy increases by only 800 J. What is the amount and direction of heat flow into or out of the system?
Antennas for radio transmission and reception are particularly effective if they're about a half-wavelength long. What's the appropriate length for an FM antenna, taking 98 MHz as a typical FM frequ
An observer that is standing 12m from a stereo sound speaker perceives the sound level from the speaker to be 60 dβ. How much further away from the speaker must the observer walk to hear a s
The armature of a simple ac generator has 30 circular loops of wire, each with a radius of 10 cm. It is rotated with a frequency of 60Hz in a uniform magnetic field of 700 mT. What is the maximum em
A student exchanges the stock headphones (B1 = 89 dB) for her mp3 player for a new set that is louder (B2 = 94.5dB). If the first set produced a power of P = 0.5 W, how much power does the new s
A point on the rim of a 0.71-m-diameter grinding wheel changes speed at a constant rate from 11 m/s to 25 m/s in 7.3 s. What is the average angular acceleration of the wheel?
A student hears a sound with an intensity of l = 16*10^-6 W/m^2. If the student hears a sound a 10 dB, what is the intensity of the sound?
A piano string is under a tension of T = 778N. When struck the wave has a period of t = 0.6ms and a wavelength of 0.77m. What is the linear density of the string?
The string has a mass of m = 99g and length L. When the string is plucked the sound travels at V = 498 m/s. What is the length of the string in m?
Unpolarized light goes through six Polaroid sheets. Each Polaroid sheet is at an angle of 30° from the one before it. What is the intensity of the light after it passes through all the sheets?