Venus and Mercury both have magnetic fields similar to Earth's
Indicate whether the statement is true or false
FALSE
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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.
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.
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
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