A glance at the speedometer on your vehicle will tell you your
A) average speed.
B) instantaneous speed.
C) overall speed.
D) acceleration.
Answer: B
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An automobile travels due north with a speed of 93 km/h and an acceleration of 1.6 m/s2. All forces considered, the unbalanced force acting on the auto is
a. zero. b. southward. c. northward. d. downward. e. upward.
What is the approximate temperature of the universe (as a whole) today?
A) 3K B) 3000K C) 300K D) The universe cannot be said to have a single temperature.
What is an eclipse season?
What will be an ideal response?
A long solenoid (n = 1200 turns/m, radius = 2.0 cm) has a current of a 0.30 A in its winding. A long wire carrying a current of 20 A is parallel to and 1.0 cm from the axis of the solenoid. What is the magnitude of the resulting magnetic field at a point on the axis of the solenoid?
a. 0.60 mT b. 0.85 mT c. 52 ?T d. 0.40 mT e. 0.75 mT