What else became calculable when Henry Cavendish calculated the value of G (the gravitational force between two objects on Earth)?
a. The distance between the Earth and the Moon.
b. The weight of the Earth.
c. The mass of the Earth.
d. The fact that the earth is spherically symmetric.
e. The diameter of Earth.
c
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Motional Emf: An eagle, with a wingspread of 2.0 m, flies toward the north at 8.0 m/s in a region where the vertical component of the earth's magnetic field is 0.20 × 10-4 T. What emf would be developed between the eagle's wing tips? (It has been speculated that this phenomenon could play a role in the navigation of birds, but the effect is too small, in all likelihood.)
Fill in the blank(s) with the appropriate word(s).
An electron has a speed of 0.783c. Through what potential difference would the electron need to be accelerated from rest in order to reach this speed? The rest mass energy of an electron is 0.511 MeV
A) 310 kV B) 260 kV C) 360 kV D) 400 kV
Which of the Jovian planets is tilted by about 90 degrees to its orbital plane?
A. Saturn B. Uranus C. Jupiter D. Neptune
The law of conservation of momentum applies to a collision between two bodies since
a. they exert equal and opposite forces on each other. b. they exert forces on each other respectively proportional to their masses. c. they exert forces on each other respectively proportional to their velocities. d. they exert forces on each other respectively inversely proportional to their masses. e. their accelerations are proportional to their masses.