Mars has a weak magnetic field
Indicate whether the statement is true or false
TRUE
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Which of the following stars would exhibit the largest amount of stellar parallax?
A) the star that is nearest to us B) the star that is farthest from us C) the star that is brightest in our sky D) the star that is dimmest in our sky E) the star that is moving at the highest speed relative to Earth
A small airplane with a wing span of 12 m flies horizontally and due north at a speed of 60 m/s in a region where the magnetic field of the earth is 60 ?T directed 60° below the horizontal. What is the magnitude of the induced emf between the ends of the wing?
A. 50 mV B. 31 mV C. 37 mV D. 44 mV E. 22 mV
Find the minimum diameter of a steel wire 18 m long that will stretch no more than 9 mm when a load of 380 kg is hung on the lower end. (Y steel = 2.0 × 10^11 N/m2)
Energy and Mass: According to the equation E = mc2, an object turns into energy when it reaches the speed of light.
A. True B. False