You are moving past the Earth at 0.990c and notice your heart beating 88 beats per minute. (a) If a doctor on Earth measures your heart rate as you zip past, what will the measured rate be? (b) If you had been moving 99
99% the speed of light, what rate would you have observed your heart beats?
(a) 12 beats/min (b) 88 beats/min
You might also like to view...
Light takes about 8 minutes to travel from the Sun to Earth and about 40 minutes to travel from the Sun to Jupiter. Jupiter is about ____________________ AU from the Sun
Fill in the blank(s) with correct word
Exhibit 16-1
A graph of position versus time for an object oscillating at the free end of a horizontal spring is shown below.
?
?
Use this exhibit to answer the following question(s).
Refer to . The point at which the object has zero velocity and positive acceleration is
a.
A
b.
B
c.
C
d.
D
e.
E
A catapult fires an 800-kg rock with an initial velocity of 100 m/s at a 40° angle to the ground. The magnitude of the horizontal impulse the catapult receives from the rock is
a. 5.1 × 10^4 N s. b. 6.1 × 10^4 N s. c. 8.0 × 10^4 N s. d. 5.0 × 10^5 N s. e. 6.0 × 10^5 N s.
Three particles, each of which has a mass of 80 g, are positioned at the vertices of an equilateral triangle with sides of length 60 cm. The particles are connected by rods of negligible mass. What is the moment of inertia of this rigid body about an axis that is parallel to one side of the triangle and passes through the respective midpoints of the other two sides?
a. 0.018 kg×m2 b. 0.020 kg×m2 c. 0.016 kg×m2 d. 0.022 kg×m2 e. 0.032 kg×m2