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Q. Suppose a bar 2 m long expands 0.6 cm when heated. By how much will a bar 100 m long of the same material expand when similarly heated?
The specific heat capacity of copper is 0.092 calories per gram per degree Celsius. How much heat is required to raise the temperature of a 10 g piece of copper from 0°C to 90°C?
How much heat is needed to raise the temperature of the same mass of water through the same temperature difference?
Radioactive decay of granite and other rocks in the Earth's interior provides enough energy to keep the interior molten, heat lava, and provide warmth to natural hot springs. This is due to the average release of about 0.03 J per kilogram each year. How many years are required for a chunk of thermally insulated granite to increase 405°C in temperature (assume the specific heat of granite is 800 J/kg °C)?
To get back to the shuttle, the astronaut unstraps a 10-kg tool kit and throws it away with a speed of 8 m/s. In the script, the astronaut, who has a mass of 80 kg without the toolkit, survives, but is this accurate.
How to compute the average force
A soccer ball with a mass of 448g bounces off the crossbar of a goal and is deflected upward at an angle of 56.2° with respect to horizontal. Immediately after deflection, the kinetic energy of the ball is 47.70 J. What are the vertical and horizo..
A tank having a volume of 0.100 m3 contains helium gas at 135 atm. How various balloons can the tank blow up if each filled balloon is a sphere 0.300 m in diameter at an absolute pressure of 1.50 atm.
Assume that it takes 2.30 kg of oxygen to burn 1.00 kg of coal. (The actual amount varies with the type of the coal). What is the total mass of the reagents used in the combustion all through the 30 days.
A 210 km long high-voltage transmission line 2 cm in diameter carries a steady current of 960 A. If the conductor is copper with a free charge density of 9.0 x10^28 electrons per cubic meter, how many years does it take one electron to travel the ..
Find out the average speed for the trip
A curve of radius 50 m is banked for the design speed of 100 km/h. If the coefficient of static friction is 0.60 (wet pavement), at what range of speeds can a car safely create the curve.
A compound microscope has an objective lens of focal length 10.50 with an eyepiece of focal length 14.80, and it produces its final image at infinity. The object to be viewed is placed 2.00 beyond the focal point of objective lens.
what happens to light of a particular frequency when it is incident upon the material that natural frequency is the same as the frequency of the light.
A yo-yo has a rotational inertia of 910 g·cm2 and a mass of 120 g. Its axle radius is 3.8 mm and its string is 100 cm long. The yo-yo is thrown so that its its initial speed down the string is 1.1 m/s.
The pulley is located so that the string makes a 45 degree angle with the beam. The beam is uniform, 5 meters long, and has weight. The professor stands 2 meters from the pivot point and has weight.
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