Distinguish between the concepts of mass and weight. Which is more fundamental, and why?
What will be an ideal response?
Answer: Mass is the quantity of matter in an object while weight is the force due to gravity on the object. Mass is more fundamental than weight because it only involves the object itself, whereas weight may vary for the same object in different locations. For example, a block of matter on the Moon will have the same mass, but weigh less than on Earth.
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A hypernova is one of several types of events that create a gamma ray burst
a. True b. False Indicate whether the statement is true or false
Projectile Motion: Which of the following statements are true about an object in two-dimensional projectile motion with no air resistance? (There could be more than one correct choice.)
A. The speed of the object is constant but its velocity is not constant. B. The acceleration of the object is +g when the object is rising and -g when it is falling. C. The acceleration of the object is zero at its highest point. D. The speed of the object is zero at its highest point. E. The horizontal acceleration is always zero and the vertical acceleration is always a non-zero constant downward.
A projectile is launched with an initial velocity of 80 m/s at 30° above the horizontal. Neglecting air, what is horizontal component of the projectile's acceleration?
A) 80 m/s2 B) 40 m/s2 C) 9.8 m/s2 D) 0 m/s2 E) 69 m/s2
If two quarks in an anti-proton have the color anti-red and anti-blue, the third quark must have the color
a. red. b. blue. c. anti-purple. d. anti-green.