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A potential difference is applied between the electrodes in a gas discharge tube. In 1.6 s, 3.2 1016 electrons and 1.1 1016 singly charged positive ions move in opposite directions through a surface perpendicular to the length of the tube. What is the current in the tube?
A stone is dropped from the top of the cliff. The splash it makes when striking the water below is heard 3.5 seconds after it is dropped. How high is the cliff? Presume that the speed of sound in air is 343 m/s and g = 9.8 m/s2.
If we can treat the atom as a 'box' of size 20 nm for an electron, what wavelengths could this electron have
A modern sculpture has a large horizontal spring, with a spring constant of 276 N/m, that is attached to a 51.0-kg piece of uniform metal at its end, By how much has the spring stretched
A granite ball of radius 2.00m and emissivity of 0.450 is heated to 135 C whereas the ambient temperature is 25 C. What is the net power radiated from the ball
You are driving north on 107th Avenue at a speed of 32.6 mph. At what frequency do you year the siren
The bones of a saber-toothed tiger are found to have an activity per gram of carbon that is 14.70 of what would be found in a similar live animal. How old are these bones.
Determine the specific heat capacity of an unknown sample of metal.
A 1200 N uniform boom is supported by a cable perpendicular to the boom, as in Figure P8.28. The boom is hinged at the bottom, and a 2000 N weight hangs from its top. Find out the tension in the supporting cable and the components of the reaction ..
Gas lanterns used on camping trips have mantles (small lacy bags that give off light) made from a rayon mesh impregnated with thorium, A typical mantle contains 345 mg of thorium. What is the activity of the mantle
A 48.9 kg pole vaulter running at 13.0 m/s vaults over the bar. Assuming that the vaulter's horizontal component of velocity over the bar is 1.7 m/s and disregarding air resistance, how high was jump.
A proton (mass 1.67 × 10 ?27kg) is moving at 1.15 ×10 ?6m/s directly toward a stationary helium nucleus (mass 6.64 × 10 ?27kg). After a head-on elastic collision, what is the helium's velocity
Consider a large truck carrying a heavy load, such as steel beams. A significant hazard for the driver is that the load may slide forward, Calculate the minimum stopping distance for which the load will not slide forward relative to the truck
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