You throw a baseball horizontally, and Jill catches it. Neglect air resistance. The energy transformation that occurs during the throw [while the ball is in your hand] is
A) thermal E ? kinetic E.
B) chemical E ? gravitational E.
C) kinetic E ? chemical E.
D) kinetic E ? thermal E.
E) chemical E ? kinetic E.
E
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If a nucleus decays by alpha decay to a daughter nucleus, which of the following statements about this decay are correct? (There may be more than one correct choice.)
A) The daughter nucleus has more neutrons than the original nucleus. B) The daughter nucleus has more protons than the original nucleus. C) The daughter nucleus has fewer protons than the original nucleus. D) The daughter nucleus has the same number of nucleons as the original nucleus. E) The daughter nucleus has fewer neutrons than the original nucleus.
A man-made satellite of mass 6105 kg is in orbit around the earth, making one revolution in 430 minutes. What is the magnitude of the gravitational force exerted on the satellite by the earth?
(The mass of the earth is 6.0 × 1024 kg and G = 6.67 × 10-11 N ? m2/kg2)
The cosmic microwave background is the total of all the radio emissions from all the galaxies and quasars in the universe
Indicate whether the statement is true or false
What type of material produces a voltage when deformed, and an applied voltage deforms the material?
(a) Dielectric (b) Paraelectric (c) Ferroelectric (d) Piezoelectric