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How did Marie and PierreCurie measure the radio activity of her pitchblende samples? How did she deduce that there must be unknown elements in the pitchblende – the ones she later found (Po and Ra)?
in a student experiment a constant-volume gas thermometer is calibrated in dry ice -78.5 c. the separate pressures are
A fixed inductance of 0.18 mH is used in series with a variable capacitor in the tuning section of a radio. What capacitance will tune the circuit to the signal from WSB which is broad casting at a frequency of 750 KHz?
a 5.0*10^2 N laod is lifted 6.0 m with a pulley. the force exerted on the pulley rope is 165 N and the efficiency is 65 %. how far is the rope pulled
A liquid with a specific gravity of 0.72 is flowing at 5.5 ft/sec through a 6 inch diameter pipe (ID=6.065 inches). What is the volumetric flow rate
a supertanker with the mass of 8.92 times 109 kg is moving with a constant velocity. its engines generate a forward
a piston with mass m 2.0 kg in a car engine is in vertical simple harmonic motion with amplitude a 5.0 cm. if the
In the distant future, a physics 360 student is rushing to her exam traveling in a spaceship at relativistic speed. Compute the wavelength she would have seen
During normal operation, a computer's hard disk spins at 7200 rpm. what is the average angular acceleration of the hard disk
One liter of helium at STP is heated at constant volume to 100 C. It is then allowed to mix in an insulated container with one liter of methane which is initially at STP, the final volume being two liters.
A 16.2 g bullet with an initial speed of 870 m/s embedded itself in a 40.0 kg block, What is the maximum compression of the spring
a large crate of mass 1.5103kg is at rest at the top of an incline of slope 15 degrees. it slides 20 m down the
q1. a pinball machine launches a 139 g ball with a spring-driven plunger. the game board is inclined at 6 above the
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