In a certain region of space there is a uniform magnetic field pointing in the positive z direction (+z). In what direction should a negative point charge move to experience a force in the positive x direction (+x)?
1.in the positive z direction (+z)
2.in the negative z direction (–z)
3.in the positive x direction (+x)
4.in the negative x direction (–x)
5.in the positive y direction (+y)
6.in the negative y direction (–y)
7.It can move in any direction.
8.It is impossible for the force to be in the +x direction when the magnetic field is in the +z direction.
6
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If a quasar has a recessional velocity of 2.7x 105 km/sec and is determined to be 3600 Mpc, what is the Hubble constant based on this quasar alone? Hint: Note that the units of your result should be (km/sec)/Mpc to see what arithmetic process you need to do on a calculator
a. 50 km/sec/Mpc b. 9.7x 108 (km/sec)Mpc c. 75 km/sec/Mpc d. 0.013 km/sec/Mpc e. 273,600 km/sec/Mpc
In a collision that is inelastic, the total _________ after the collision is not the same as before the collision
Fill in the blank(s) with correct word
A lightweight object and a very heavy object are sliding with equal speeds along a level frictionless surface. They both slide up the same frictionless hill. Which rises to a greater height?
A) The heavy object, because it has greater kinetic energy. B) The light object, because it has smaller kinetic energy. C) The lightweight object, because it weighs less. D) The heavy object, because it weighs more. E) They both slide to the same height.
A 50-W resistor, a 0.1-H inductor, and a 20-µF capacitor are connected in series to a 60-Hz source. The rms current in the circuit is 3 A. Find the rms voltage across the resistor, the inductor, and the capacitor
a. 150 V, 113 V, 398 V (all rms) c. 0.06 V, 80 V, 562 V (all rms) b. 150 V, 113 V, 796 V (all rms) d. 60 V, 80 V, 398 V (all rms)