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A piece of iron is heated with a torch to a temperature of 648 K. How much more energy does it emit as blackbody radiation at 648 K than it does at room temperature, 291 K?
A man on the West Bank of river is capable of swimming at 10 meter/Minutes in still water, wants to take shortest time . In what direction he should move?
Suppose you have a resistor R1=10 Ohms tied in a series with a parallel combination of two resistors R2=10 Ohms and R3=5 Ohms. What is the total resistance of this circuit? What is the total current during the battery if the battery supplies 9V?
A 0.750 kg ball falls directly down onto concrete, hitting it with a speed of 12.0 m/s and rebounding directly upward with a speed of 3.00 m/s. What is the impulse on the concrete
What is the velocity of the wind - in respect to the ground? the value of the velocity (of the wind) , and the direction (angle) of the velocity of the wind (how many degrees from the west to the south)
The speed of sound in human tissue is on the order of 1500 m/s. A 3.50-MHz probe is used for an ultrasonic procedure. (a) If the effective phsical depth of the ultrasound is 250 wavelengths, what is the physical depth in meters?
A capacitor is made from two hollow, coaxial, iron cylinders, one inside the other. The inner cylinder is negatively charged and the outer is positively charged; the magnitude of the charge on each is 10.0pCpC .
A spring with spring constant k is initially compressed a distance x from its equilibrium length. After returning to its equilibrium, the spring is then stretched a distance x from that position. What is the ratio of the work that needs to be done on..
(a) Calculate the number of gas molecules per cubic centimeter at this pressure. (b) What is the mean free path of the gas molecules if the molecular diameter is 2.12 x 10-8 cm.
In the two-slit experiment, monochromatic light of wavelength 600nm passes through a pair of slits separated by 2.2E10^-5 m. what is the angle corresponding to the first bright fringe
Washington D.C is roughly 3000 miles from San Francisco. When it is 8:00 a.m. in San Francisco, it is 11:00 a.m. in Washington D.C. Using this information, find the rotational speed of the surface of Earth
A vector force F= 6i + 5j N causes a torque on the end of vector distance R= 3i m. Use the cross product to find the resultant torque
A truck is traveling around a level curve of radius 101.2 m at an instantaneous speed of 20.2 m/s. The truck's speed is increasing at the rate of 1.98 m/s2. Discover the magnitude of the frictional force on a 106.2 kg crate resting on the floor of th..
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