What must be your average speed in order to travel 350 km in 5.15 h?
A) 66.0 km/h
B) 67.0 km/h
C) 68.0 km/h
D) 69.0 km/h
C
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The figure below shows a planet traveling in a clockwise direction on an elliptical path around a star located at one focus of the ellipse. When the planet is at point A,
A. its speed is constant. B. its speed is increasing. C. its speed is decreasing. D. its speed is a maximum. E. its speed is a minimum.
A bullet is fired from ground level with a speed of 150 m/s at an angle 30° above the horizontal at a location where g = 10.0 m/s2. How long does it take before the bullet hits the ground?
A) 10 seconds B) 5.0 seconds C) 15 seconds D) 7.5 seconds E) 30 seconds
When we say an appliance "uses up" electricity, we are actually saying that
A) current disappears. B) electric charges are dissipated. C) the main power supply voltage is lowered. D) electrons are taken out of the circuit and put somewhere else. E) electrical energy changes to thermal energy.
A charged capacitor is connected to an ideal inductor. At time t = 0, the charge on the capacitor is equal to 6.00 ?C
At time t = 2.00 ms the charge on the capacitor is zero for the first time. What is the amplitude of the current at that same instant? A) 0.780 mA B) 1.19 mA C) 2.38 mA D) 4.71 mA E) 1.53 mA