Physics, 08.10.2019 04:00 shantejahtierr63961
It is interesting to speculate on the properties of a universe with different values for the fundamental constants.
a. in a universe in which planckās constant had the value h = 1 j s, what would be the de broglie wavelength of a 145 g baseball moving at a speed of 20 m/s?
b. suppose the velocity of the ball from part (a) is known to lie between 19 and 21 m/s. what is the smallest distance within which it can be know to lie?
c. suppose that in this universe the mass of the electron is 1 g and the charge on the electron is 1 c. calculate the bohr radius of the hydrogen atom in this universe
Answers: 3
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The image shows the positions of a car on a roller coaster track. arrange the cars in order based on their gravitational potential energy. begin with the lowest potential energy and end with the highest.
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It takes a lot of energy to get the temperature of water to increase and eventually boil because water has a high heat.
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The drag force, fd, imposed by the surrounding air on a vehicle moving with velocity v is given by fd = cdaĻv 2/2 where cd is a constant called the drag coefficient, a is the projected frontal area of the vehicle, and Ļ is the air density. an automobile is moving at v = 80 kilometers per hour with cd = 0.28, a = 2.3 m2, and Ļ = 1.2 kg/m3.
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