A Muon is
A. a Baryon.
B. a Lepton.
C. a Hadron.
D. a Proton.
B. a Lepton.
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A light ray bends when it goes from one medium to another because of diffraction
a. True b. False Indicate whether the statement is true or false
A toy gyroscope (a.k
a. a top) consists of a solid disk with a thin rod projecting perpendicular to the center of the disk. The rod, which serves as the rotational axis for the gyroscope, projects on both sides of the disk. The gyroscope is placed with one end of the axis on the surface of the table, and spun so that the rotation of the disk viewed from above is counterclockwise. Alas, the axis of rotation is not quite perpendicular table surface and so the gyroscope precesses. Viewing from above, with the end of the axis in contact with the table staying in the same spot, in what direction does the other end of the axis of the gyroscope precess? a. The precession is clockwise. b. The precession is counterclockwise. c. In the northern hemisphere the precession is clockwise, but in the southern hemisphere it is counterclockwise. d. In the northern hemisphere the precession is counterclockwise, but in the southern hemisphere it is clockwise.
Which rocket would require more fuel?
A) one going from the Moon to Earth. B) one going from Earth to the Moon. C) both the same.
Two experiments are performed. In (A), an 18.0-N force pushes horizontally on a 2.00-kg block that then pushes on a 4.00-kg block. In (B), an 18.0-N force pushes on a 4.00-kg block that then pushes on a 2.00-kg block. Which statement is correct?
A. The acceleration is 3.00 m/s2 in both (A) and (B). B. The acceleration is 4.50 m/s2 in both (A) and (B). C. The acceleration is 6.00 m/s2 in both (A) and (B). D. The acceleration is 9.00 m/s2 in both (A) and (B). E. The 2.00-kg block has a 9.00 m/s2 acceleration. The 4.00-kg block has a 4.50 m/s2 acceleration.