Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
The headlights on a certain car are measured to be 1.1 m apart. The diameter of the pupil in a human eye is 2.5 mm. What is the furthest distance at which a human eye could clearly see the headlight
An electron traveling at 713 m/s enters a 0.9 T magnetic field. The angle between the velocity and the field is 90o. Find the radius of the resulting circular path.
Consider the interface between atmospheric air and a body of water, both at 17 °C.
The work function of sodium is 2.23 ev. What is the longest wavelength that a photon may have , if it is to cause an electron to be ejected when the photon strikes the surface of a piece of sodium?
A 25oC capacitor is charged to a potential of 18V. (a) How much charge is stored on the capacitor? (b) The potential is then changed so that the charge becomes 5.9 x 10-4C. What is the change in pot
The plates of a spherical capacitor have radii 43.4 mm and 46.9 mm. What must be the plate area in square centimeters of a parallel-plate capacitor with the same plate separation and capacitance?
On a hot summer day, the temperature of air in Arizona reaches 113°F. What is the speed of sound in air at this temperature? (Enter your answer to four significant figures. The speed of sound at
An electron traveling at 993 m/s enters a 1.5 T magnetic field. The angle between the velocity and the field is 90o. Find the radius of the resulting circular path.
An electron is accelerated through a potential difference of 400V. Find its wavelength and momentum.
Find the velocity of the most energetic electron emitted from the cathode when the incident light on the cathode is 100nm.
How much heat must a refrigerator remove from 100 g of water at 25 º C to convert it to ice at 0º C? (Specific heat of water = 1 cal /gº C and heat of fusion of ice = 80 cal/g at 0&or
A wire carrying a current is shaped in the form of a circular loop of radius 3.0 mm. If the magnetic field strength at its center is 1.1 mT with no external magnetic fields contributing to it, what
A young hockey player stands at rest on the ice holding a 1.3-kg helmet. The player tosses the helmet with a speed of 4.6 m/s in a direction 9° above the horizontal, and recoils with a speed of
The transverse displacement of a particular wave on a string is given by: D(x,t) = 0.3 cos(1.57x ? 7.85t) where D and x are in meters, and t is in seconds. For this wave, find its:
A typical nuclear fission power plant produces about 1.00 GW of electrical power. Assume the plant has an overall efficiency of 42.0% and each fission produces 150 MeV of thermal energy. Calculate the
The hearing aid picks up sound having a frequency of 250 Hz at an intensity of 2.50 10-11 W/m2. What is the intensity delivered to the eardrum?
For a certain transverse wave, the distance between two successive crests is 1.20 m, and eight crests pass a given point along the direction of travel every 12.0 s. Calculate the wave speed.
A virtual image is located 53.5cm behind a concave mirror with focal length 20.0cm. Where is the distance from the mirror to the object?
A camera's zoom lens covers the focal-length range 38mm -138mm. You point the camera at a distant object and photograph it first at 38mm and then with the camera zoomed out to 138mm. Compare the si
A rifle of 8lb fires a bullet weighing 0.8oz which leaves the rifle with a muzzle velocity of 2000 ft/s. What is the recoil velocity of the rifle?
Short sections of two very long parallel lines of charge are shown, fixed in place and separated by L =10.0 cm. The uniform linear charge densities are +8.0 µC/m for left hand side and -3.0 &m
What is the smallest magnetic field (vertical) that would cause the bar to slide with acceleration 0.5 m/s^2 ?
If the distance between the first and tenth maxima of a double slit pattern is 4.2mm and the slits are separated by 0.15mm with the screen 90cm from the slits, what is the wavelength of the used?
If a 0.379 m radius hollow ball has a rotational kinetic energy of 2.924 J while spinning at 5.7 rad/seg, what is its mass?
Question: A highway curve with radius 850 is to be banked so that a car traveling 52.0 will not skid sideways even in the absence of friction. At what angle should the curve be banked?