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The near point of the person using the microscope is 24.5 and you can assume she can view the image produced with a fully relaxed eye. What is the focal length of the objective?
The headlights of on a small car are separated by 115 cm. At what maximum distance could you resolve them if the diameter of the pupil of your eye is 5 mm and the wavelength of light is assumed to b
Your car has a rear view mirror that is convex with a radius of curvature of 5 m. A car is approaching you from the rear. Calculate the demagnification of the image of the approaching car as seen by
The index of refraction for silicate flint glass is 1.66 for light with a wavelength, in air, of 400 nm and 1.61 for light with a wavelength, in air, of 700 nm. Find the angles of refraction for lig
If there are five dark bands per centimeter, what is the angle of the wedge?
Two steel wires of the same length, one with radius r and the other with radius 2r, are connected together, end to end, and tied to a wall. An applied force stretches the combination by d = 1.6 mm.
A cylinder of radius 3.34 cm and a sphere of radius 8.47 cm are rolling without slipping along the same floor. The two objects have the same mass. If they are to have the same total kinetic energy,
A biophysicist grabs the ends of a DNA strand with optical tweezers and stretches it 27um . How much energy is stored in the stretched molecule if its spring constant is 0.044pN/um ?
A spring of constant 290N/m is used to launch a 1.0kg block along a horizontal surface whose coefficient of sliding friction is 0.25. If the spring is compressed 16cm, how far does the block slide?
For small stretches, the Achilles tendon can be modeled as an ideal spring. Experiments using a particular tendon showed that it stretched 2.66mm when a 125kg mass was hung from it. Find the spring
A skier starts down a frictionless 33 degree slope. After a vertical drop of 30m , the slope temporarily levels out and then drops at 15 degrees an additional 44m vertically before leveling out agai
A 3-kg object attached to a spring oscillates on a smooth horizantial surface. Its position versus time is given by the expressionCalculate the spring force exerted on the object versus time t.
Earnshaw's theorem says that you cannot trap a charged particle in an electrostatic field. Could you trap a neutral but polarizable atom in an electrostatic field?
Where is the image of the robin and how long is the image? (hint: remember that the focal length is half the radius, and focal length is negative for a convex mirror)
42 g firecracker at rest at the origin when it explodes into three pieces the first with mass 12 g moves along the x axis at 35m/s the second mass is 21g moves along the y axis at 29m/s find the vel
A hollow conducting spherical shell of radius 1.20 cm carries a charge of -5.20 nC. What is the electric field at a distance of 1.50 cm from the center of the shell?
Two barometers are made with water and oil. the density of the oil is 900 kg/m3 and that of water 1000 kg/m3. If the oil column is 10m tall, how hall is the water column.
A transition in a nucleus consists of changing a three-quarks group uud to a udd collection. This transition is mediated by which of the four basic forces? Hint, what is the net effect of this chang
Assume a perfectly elastic collision and take the initial direction of the balls as positive. a) What is the velocity of the tennis ball after the collision?
A neon atom (m = 20.0 u) makes a perfectly elastic collision with another atom at rest. After the impact, the neon atom travels away at a 54.6° angle from its original direction and the unknown
A capacitor of capacitance C = 6 oF is connected in series with a resistor R = 5 M to a battery of emf E=15V What is the value of the current in the circuit when the capacitor has reached 20% of its
If the block compresses the spring 4.8 cm before coming to rest, what is the force constant of the spring?
A 9.0uF capacitor, a 11uF capacitor, and a 19uF capacitor are connected in series. What is their equivalent capacitance?
Catapult fires an 800-kg rock with an initial velocity of 100 m/sat a 40° angle from ground. What is the magnitude of the horizontal impulse the catapult receives from the rock?