A straight wire that is 0.60 m and carrying a current of 2.0 A is placed at an angle with respect to the magnetic field of strength 0.30 T. If the wire experiences a force of magnitude 0
18 N, what angle does the wire make with respect to the magnetic field?
A) 25° B) 35° C) 30° D) 60° E) 20°
C
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When observing a very distant quasar, we are actually seeing the universe the way it was when it was much younger than it is today
Indicate whether the statement is true or false
The mass in the figure below slides on a frictionless surface.
When the mass is pulled out, spring 1 is stretched a distancex1from its equilibrium position and spring 2 is stretched a distancex2. The spring constants arek1andk2, respectively. The force pulling back on the mass is
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.A cart changes its speed from 90 m/s to 100 m/s in 10 seconds. During this interval its acceleration is
A) zero. B) 1 m/s2. C) 10 m/s2. D) none of the above
Which of these, if used to replace gasoline as an automobile fuel, would not contribute to global warming?
A) Synthetic gasoline made from coal B) Electricity from a nuclear power plant C) Electricity from a coal-burning plant D) All of the above would contribute to global warming. E) None of the above would contribute to global warming.