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You have been visiting a distant planet. Your measurements have determined that the planet's mass is two times that of earth but the free-fall acceleration at the surface is only one-fourth as large
A "biconvex" lens is one in which both surfaces of the lens bulge outwards. What is the focal length f of this lens in air
If the induced voltage is 0.5 V, as B field is decreasing at a rate of 0.5 T/s in a loop. Calculate the area of the loop
You fly your 15 m spaceship, parallel to the ship's length with a speed of c/3 to your friend. How long is your spaceship as observed by your friend
A 20.0kg light signal hangs from the end of a 7.0m uniform density pole of mass 12.0kg. The pole is free to swivel from the hinge at point A, What is the reaction force (magnitude and direction) at t
A weather satellite encircles the earth at an orbital speed of 6200 m/s. How high above the earth's durface does it orbit
Calculate the minimum amout of work (in joules) required to freeze one liter of water originally at temperature T = 20 degrees celsius
A potter's wheel is a uniform solid disk of diameter 0.72m and a mass of 60kg. the wheel is initially spinning at a rate of 85 rev/min. what is moment of inertia of the disk
A piece of charcoal used for cooking is found at the remains of an ancient campsite. Find the age of the charcoal in years
Light of two different wavelengths is used in a double-slit experiment. What is the wavelength of the other light
Determine the rate at which the electric field changes between the round plates of a capacitor, 5.6 cm in diameter
A 5kg block initially at rest is pulled to the ight along a horizontal surface by a constant, force of 30N acting at 53 degrees above the horizontal. Find the net work done on the block
If a piece of irion (c=450 J/ kg C) at 65 C is dropped into 0.250 kg of ethyl acohol at 25 C and the final temperature of the two comes to 35 C what was the mass of the piece of iron
A person with a near-point distance of 37 cm is able to get a usable magnification of 15 with a particular magnifying glass. What is the friend's near-point distance
A neutral pie-meson is particle that can be created by accelerator beams. If one such particle lives 1.40 x 10^16 s as measured in the laboratory, what is its velocity relative to the laboratory
In the circuit show in the figure, S1 has been closed for a long enough time so that the current reads a steady 3.5A. What is the maximum charge that the capacitor will receive
In an L-C circuit, C=3.21*10^-6 F and L=86.0mH. During the oscillations the maximum current in the inductor is .851mA. What is the maximum charge of the capacitor
at some point in space,the x and y components of the electric field are Ex= 1.73 N/C, respectively and Ey= 3.75 N/, respectively. What is the net charge of the particle
A human hair is placed directly in front of the opening of a laser pointer. The light has a wavelength of 647.8 nm. Determine the approximate thickness of the hair
A camera lens used for taking close-up photographs has a focal length of 21.5 mm. The farthest it can be placed from the film is 30.0mm. What is the closest object that can be photographed
The plate seperation of a parallel plate capacitor is 1mm. The area of the plates is 10cm2. Determine the energy stored in the capacitor with the dielectric
A 3.5-cm tall object is viewed through a converging lens. When the lens moves from one place to another, the orientation of the image changes from upright to inverted. How far from the object does t
The plate seperation of a parallel plate capacitor is 1 cm. The potential on the negatively charged plate of the capacitor is zero. find the strength of the electric field in the capacitor
A particular engine has a power output of 4.00 kW and an efficiency of 23.0%. Assume the engine expels 7000 J of energy in each cycle. Find the energy absorbed in each cycle
A 7.70-uF capacitor and a 1250-ohm resistor are connected in series to a generator operating at 50 Hz, What is the average power dissipated in this circuit