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1. How much heat is required to raise the temperature of 415 g of water from 20°C to 32°C?
2. How much work is required to push a crate at constant velocity with a force of 195 N across a floor a distance of 8 m?How many calories of thermal energy are produced by the friction?
3. During a process, 28 J of heat are transferred into a system, while the system itself does 12 J of work. What is the change in the internal energy of the system?
4. How much heat is required to convert 175 g of ice at -6°C to water at 6°C?
5. What would happen if absolute zero could be reached?
6. An engine takes in 8000 cal of heat and exhausts 4000 cal of heat each minute it is running. How much work does the engine perform each minute?
A piece of wood is 6.00 m long, 0.260 m wide and 0.060 m thick. Its density is 600kg/m cubed. What volume of iron ( P iron = 7.8 x 10 cubed kg/m cubed) must be fastened underneath the wood to sink it so that the top surface of the wood is just even w..
Light with a wavelength of 4.5 x10-5 cm passes through a single slit and falls on a screen 100 cm away. If the slit is 0.015 cm wide, what is the distance from the center of pattern to first dark band.
Jane and Jon, with masses of 50 kg and 60kg, respectively,stand on a frictionless surface 10m apart, What is JOhn's acceleration
A 500kg helicopter ascends from the ground with an acceleration of 2.00m/s^2 over a 5.00second interval, what is the work done by the gravitational force
A high-pass RC filter is connected to an AC source with a peak voltage of 18 V. The peak capacitor voltage is 5.27 V
q1. the rotational inertia of a collapsing spinning star changes to 45 its initial value. what is the ratio of new
Two point charges are placed on the x-axis. A charge -q is located at the origin, and a charge -2q is located at x = +d. at what location is the total electric potential zero
Hakeem throws an 8.50 g ball straight down from a height of 2.0 m. The ball strikes the floor at the speed of 7.5 m/s. What was the initial speed of the ball? Suppose that air resistance is negligible.
A car of mass m moving at a speed v1 collides and couples with the back of a truck of mass 3m moving initially in the same direction, What is the change in kinetic energy of the car-truck system in the collision
An L-R-C series circuit with an inductance of 0.123 H , a resistance of 240 omega , and a capacitance of 7.29 micro F carries an rms current of 0.445. What is the rms voltage of the source
At 26.0 m below the surface of the sea (density = 1 025 kg/m3), where the temperature is 5.00°C, what is the volume of the bubble just before it breaks the surface
A sophomore with nothing better to do adds heat to 0.350 kg of ice at 0.00°C until it is all melted. What is the change in entropy of the water
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