Each diagram shows five star circles. Look at the first circle to the north of the celestial equator on each diagram. Can you characterize the declination of stars on this circle? If so, what is it? Can you characterize the right ascension of stars on this circle? If so, what is it?
What will be an ideal response?
Declination is +30°; right ascension cannot be characterized without further information.
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What will be an ideal response?
A 3.00-kg ball swings rapidly in a complete vertical circle of radius 2.00 m by a light string that is fixed at one end. The ball moves so fast that the string is always taut and perpendicular to the velocity of the ball
As the ball swings from its lowest point to its highest point A) the work done on it by gravity and the work done on it by the tension in the string are both equal to -118 J. B) the work done on it by gravity is -118 J and the work done on it by the tension in the string is +118 J. C) the work done on it by gravity is +118 J and the work done on it by the tension in the string is -118 J. D) the work done on it by gravity is -118 J and the work done on it by the tension in the string is zero. E) the work done on it by gravity and the work done on it by the tension in the string are both equal to zero.
Why must you use the same reference point b g h0 on the spring for each subsequent height measurement?
A battery in a large flashlight produces a current of 2 amperes in a light bulb that has a resistance of 3 ohms. What is the voltage of the battery?