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A 1.8 book is lying on a 0.70 -high table. You pick it up and place it on a bookshelf 2.3 above the floor. How much work does gravity do on the book?
A boy on a skateboard coasts along at 6.0 m/s. He has a ball that he can throw at a speed of 10 m/s. What is the ball's speed relative to the ground if he throws the ball forward?
A resistance of 240 omega , and a capacitance of 7.29 micro F carries an rms current of 0.445 A with a frequency of 392 Hz. What is the power factor for this circuit.
Question: The ice cap at the North Pole has an area of about 6E6 km^2 and an average thickness of 25.0 m. If all of this ice melts, what is the approximate effect on the Earth's rotation rate?
Question: Gas is contained in an 8.05 liter vessel at a temperature of 18.5 deg C and a pressure of 8.47 atm. Determine the number of moles of gas in the vessel.
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?
An automobile fuel tank is filled to the brim with 56.0 liters (14.9 gallon) of gasoline at 11.5 deg C. Immediately afterward, the vehicle is parked in the Sun, where the temperature is 34.8 deg C.
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 volume of an ideal gas is increased from 0.8m3 to 2.4 m3 while maintaining a constant pressure of 1000 Pa (1Pa=1N/m2). How much work is done by the gas in this expansion?
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
Suppose 0.380 kg of water initially at 45.0°C is poured into a 0.300 kg glass beaker having a temperature of 25.0°C. A 0.500 kg block of aluminum at 37.0°C is placed in the water, and th
The wave has a wavelength of 4m, a frequency of 50Hz, and an amplitude of 3cm. What is the wave function for this wave?
Light of wavelength 669 nm is incident on a double slit. The angle between the central bright fringe and the second dark fringe is 4.90°. Determine the separation d of the slits.
A car of mass m is initially moving with a velocity v. The driver hits the brakes due to which the retarding force on the car is equal to F = -ke^(-bt). Find the time that it takes for the car to co
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?
Question: A 24.0 kg gold bar at 27.0°C is placed in a large, insulated 0.800 kg glass container at 15.0°C with 2.00 kg of water at 25.0°C. Calculate the final equilibrium temperature.
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