Venus and Mercury both have magnetic fields similar to Earth's
Indicate whether the statement is true or false
FALSE
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Two wheels with fixed centers are in contact with each other and rotate without slipping. Wheel A has a radius of 12.0 cm and is rotating with an angular speed of 35.0 rad/s. Wheel B has a radius of 17.0 cm. What is the angular speed of wheel B?
A) 49.6 rad/s B) 24.7 rad/s C) 5.83 rad/s D) 4.97 rad/s E) 12.4 rad/s
A sound wave has a frequency of 850 Hz. What is the sound wave's wavelength if the air temperature is 26.0 °C?
a. 0.41 m b. 2.0 m c. 33 m d. 0.42 m
What is one atomic mass unit?
a. The mass of a hydrogen atom at the Earth's surface. b. The mass of an oxygen atom in outer space. c. The mass of a carbon atom. d. One-twelfth of a carbon atom. e. One-twentieth the mass of a uranium atom.
The formation of more protons than neutrons (at about a 7:1. ratio) was favored in the early universe because
A) it takes more energy to create a neutron from a proton than a proton from a neutron. B) it takes more energy to create a proton from a neutron than a neutron from a proton. C) the more massive neutrons made better targets for nucleon collisions. D) the positively charged protons were repelled away from the explosion.