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Blocks with masses of 1.1 kg, 2.03 kg, and 2.92 kg are lined up in a row on a frictionless table. All three are pushed forward by a 10 N force applied to the 1.1 kg block. How much force does the 2.
A 1.87-m-long, 552 g rope pulls a 4.4 kg block of ice across a horizontal, frictionless surface. The block accelerates at 1.65 m/s2. How much force pulls forward on the ice?
A 28000 kg rocket has a rocket motor that generates 309200 N of thrust. What is the rocket's initial upward acceleration?
A 2.73 kg wood block is launched up a wooden ramp that is inclined at a 30° angle. The block's initial speed is 10.15 m/s. What vertical height does the block reach above its starting point?
The safe slides with a constant speed if Clyde pushes from behind with 399 N of force while Bonnie pulls forward on a rope with 363 N of force. What is the safe's coefficient of kinetic friction on
What is the capacitance of this capacitor? Hint: first find the potential difference between the tube and the wire if they are charged with charge +/- Q and are vacuum insulated?
The mass of the gas in the balloon must be 200 kilograms less than the mass of the ambient air it displaces. Pres-sure (ambient and in the balloon) is 100 kPa and ambient temperature is 300 K. Mass
A 281 ball is tied to a string. It is pulled to an angle of 3.6 and released to swing as a pendulum. A student with a stopwatch finds that 26 oscillations take 18 .
You estimate your line of sight with the top of the arch to be 9.8° above the horizontal. Approximately how far (in kilometers) are you from the base of the arch?
A conducting slab (think of a large flat sheet of metal) is large compared to the size of individual particles and molecules and carries an excess positive charge. a) Where does the excess charge re
A small mailbag is released from a helicopter that is descending steadily at 3.00 m/s.
Both fields point in the same direction. A positive 1.8-µC charge moves at a speed of 2.50 x 106 m/s in a direction that is perpendicular to both fields. Determine the magnitude of the net force
A sample of helium behaves as an ideal gas as it is heated at constant pressure from 273K to 373K. If 20J of work is done by the gas during this process, what is the mass of helium present?
Two identical 25 g particles each carry 2.0 uC (micro Coulomb's) of charge. One is held fixed, and the other is placed 1.0 mm away and released. Find the speed of the moving charge when it's 1.0 cm
An electron begins at rest, and then is accelerated by a uniform electric field of 800N/C that extends over a distance of 7 cm. Find the speed of the electron after it leaves the region of uniform e
Oscillation of a 170 Hz tuning fork sets up standing waves in a string clamped at both ends. The wave speed for the string is 520 m/s. The standing wave has four loops and an amplitude of 4.7 mm. Wh
If a diver 40 m below the surface of a deep lake fills his lungs to the full capacity of 6 liters and then rises quickly to the surface, to what volume will his lungs expand? Is such a rapid ascent
When the plane is a distance 121 directly above a dog that is standing on level ground, a suitcase drops out of the luggage compartment. How far from the dog will the suitcase land? You can ignore a
Write the equation used to determine the latent heat of fusion of ice in terms of the appropriate masses, temperature changes and specific heats (define all quantities) in an adiabatic process.
A 2--tall object is 26 to the left of a lens with a focal length of 13 . A second lens with a focal length of -5 is 37 to the right of the first lens. Calculate the distance between the image and th
A tin can is filled with water to a depth of 39 cm. A hole 18 cm above the bottom of the can produces a stream of water that is directed at an angle of 39^ above the horizontal. a) Find the range o
The plates are in a vacuum and are 6 cm apart. A plastic sphere with a mass of 3.0 x 10^-12 kg and a charge of -0.035 microcoulombs is placed on the lower plate. (a) What is the electric field betwe
Two masses m1 and m2 are connected via a massless, unstrecthable string over a massless pulley. Mass m2=72N rests on the surface of an incline making θ=34 degrees. What must be the mininmum va
A 104 W lightbulb has a resistance of about 12 when cold (20°C) and 137 when on (hot). Estimate the temperature of the filament when hot assuming an average temperature coefficient of resistivit
If, instead, the gold is drawn out into a cylindrical fiber of radius 2.700 µm, what is the length (in m) of the fiber?