Determine the speed of an electron being emitted
Determine the speed of an electron being emitted by rubidium (2.16 eV) when light of the following wavelengths is shone on the metal in vacuum (a) 550 nm (b) 450 nm and (c) 350 nm.
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A researcher is studying a group of 20 senior citizens in two groups of 10, from 55 to 74 to see if they become depressed over time as they age and health declines, Can some one do a test for me that show critical values, degrees of freedom, and al
2Na + 2H2O -------> 2NaOH + H2if 90.0 grams of sodium is dropped into 80.0 ml of water, how many liters of hydrogen at STP woud be produced? which reactant is in excess and how much of it is leftover?
The vector F is directed 115° from the x-axis and 65° from the y-axis. At what load F will the force along the bar exceed 300 lb?
Determine the difference in potential between two points that are distances R_a and R_b from a very long (\gg R_a or R_b) straight wire carrying a uniform charge per unit length lambda.
The acceleration of gravity is 9.8m/s^2. Determine the magnitude of the acceleration of the 8.22 kg block. Answer in units of m/s^2.
Assuming the specific heats of air are constant (at the 300 K values) determine the final temperature of the air. Determine the final pressure in the tank.
2 Mg + O2 ------> 2MgOif 1.00 g of magnesium is ignited in a flask containing 0.500liters of oxygen at STP, how many grams of magnesium oxide areproduced? What is the name and the amount of the reactant inexcess?
The astronaut's seat is inclined to stay perpendicular to his apparent weight. Calculate the centrifuge's rotational speed v. Answer in units of m/s.
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