A certain star is 1000 light years from Earth. According to the theory of relativity, is it physically possible for Mort to travel from Earth to this star during Mort's normal lifetime?
A) No, because Mort cannot travel faster than light.
B) No, because the relativity of time will cause Mort to age too rapidly.
C) No, because Mort's aging process is normal as measured in their own reference frame.
D) Yes, by traveling at nearly lightspeed.
E) Yes, by traveling much faster than lightspeed.
D
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Potential Energy: A very small 4.8-g particle carrying a charge of +9.9 ?C is fired with an initial speed of 8.0 m/s directly toward a second small 7.8-g particle carrying a charge of + 5.2 ?C. The second particle is held fixed throughout this process. If these particles are initially very far apart, what is the closest they get to each other? (k = 1/4??0 = 9.0 × 109 N ? m2/C2)
Fill in the blank(s) with the appropriate word(s).
An up quark (u) has a charge of +2/3 and a down quark (d) has a charge of ?1/3. Which of the following describes a neutron?
A) uuu B) uud C) udd D) ddd
Three masses are located in the x-y plane as follows: a mass of 6 kg is located at (0 m, 0 m), a mass of 4 kg is located at (3 m, 0 m), and a mass of 2 kg is located at (0 m, 3 m). Where is the center of mass of the system?
A) (1 m, 2 m) B) (2 m, 1 m) C) (1 m, 1 m) D) (1 m, 0.5 m) E) (0.5 m, 1 m)
A hole of radius 1.0 mm occurs in the bottom of a water storage tank that holds water at a depth of 15 m. At what rate will water flow out of the hole?
What will be an ideal response?