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A block of material has a mass of 80 kg and a volume of 4.1 10-2 m3. The material has a specific heat capacity and coefficient of volume expansion respectively, of 725 J/(kg · C°) and 6.3 10-5 (C°)-1. How much heat must be added to the block in order to increase its volume by 1.0 10-5 m3?
The maximum allowed leakage of microwave radiation from a microwave oven is 5.0 mW/cm^2, what is the amplitude of the oscillating electric field
compare the electric force holding the electron in orbit (r=0.53*10^-10m) around the proton nucleus of the hydrogen atom, What is the ratio of these two forces
A model of a red blood cell portrays the cell as a spherical capacitor, a positively charged liquid sphere of surface area A separated from the surrounding negatively charged fluid by a membrane of thickness t, Estimate the capacitance of the cell ..
When the temperature of a coin is raised by 71.8 C°, the coin's diameter increases by 2.11 x 10-5 m. find the coefficient of linear expansion
A small immersion heater is rated at 352 W. Estimate how long it will take to heat a cup of soup (suppose this is 250 mL of water) from 20°C to 50°C.
Does the length of the Guy West Bridge ever change? Estimate the difference in the length of the footbridge between the hottest and coldest day of the year. estimate the length of the bridge
A bar of length .15 m, width .05 m and negligible height is spinning about its center of mass at 2 radians per second. what is their final angular velocity
What is the minimum coefficient of static friction between the road and the tires on a car for the car to go around a flat curve at 45.0 mph
An L-R-C series circuit is constructed using a 175? resistor, a 12.5?F capacitor, and an 8.00-mH inductor, find the potential difference across the ac source
The normal force equals the magnitude of the gravitational force as a roller coaster car crosses the top of a 49m diameter loop the loop
A hollow, conducting sphere with an outer radius of 0.260m and an inner radius of 0.198m has a uniform surface charge density of +6.70×10^?6 C/m^2. What is the new charge density on the outside of the sphere
TV broadcast antennas are the tallest artificial structures on Earth. In 1987, a 72.0-kg physicist placed himself, By how much was the antenna compressed
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