Neutron stars are the size of ________
Fill in the blank(s) with correct word
a large city or smaller asteroid
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As more lamps are connected in a series circuit, the overall current in the power source
A) increases. B) decreases. C) stays the same.
The longest wavelength of a photon that can be emitted by a hydrogen atom, for which the initial state is n = 3, is closest to which one of the following values? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)
A) 625 nm B) 600 nm C) 550 nm D) 658 nm E) 575 nm
Calorimetry: A person makes iced tea by adding ice to 1.8 kg of hot tea, initially at 80°C. How many kilograms of ice, initially at 0°C, are required to bring the mixture to 10°C? The specific heat of water (and tea) is 4186 J/kg ? K, and the latent heat of fusion of ice is 3.34 × 105 J/kg.
A. 1.0 kg B. 1.2 kg C. 1.4 kg D. 1.7 kg
A bicyclist starts from rest at the top of a hill and rolls down the hill without pedaling. Assuming there is no friction and the bottom of the hill is 20 meters below the top, what is the bicyclist's speed at the bottom of the hill?