A butterfly moves with a speed of v = 12.0 m/s. The x-component of its velocity is 8.00 m/s. The angle between the direction of its motion and the x-axis must be
A) 60.0°
B) 41.8°
C) 48.2°
D) 30.0°
E) 53.0°
C
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How do a prominence and a flare differ?
A. A prominence is brief, bright eruption in the chromosphere; a flare is a tenuous flow of hydrogen and helium that sweeps across the Solar System. B. A prominence is a huge plume of glowing gas trapped in the Sun's magnetic field; a flare is a brief, bright eruption in the chromosphere. C. A prominence is a jet of hot gas thousands of kilometers long; a flare is an immense bubble of hot gas rising from deep within the Sun. D. There is no difference between a prominence and a flare.
Angular and Linear Quantities: An electrical motor spins at a constant 2695.0 rpm. If the rotor radius is 7.165 cm, what is the linear acceleration of the edge of the rotor?
A. 5707 m/s2 B. 281.6 m/s2 C. 572,400 m/s2 D. 28.20 m/s2
Work-Energy Theorem: The horizontal force that an animal exerts on a large fruit it has found is observed and is shown in the graph in the figure. If the fruit was initially sliding on the frictionless ground at 5.5 cm/s when the animal first grabbed it, by how much did the animal change its kinetic energy during this encounter?
A. 12.5 J B. 50 J C. 25 J D. 22 J E. 0 J
______________ properties are those that do not describe the chemical reactivity of the substance
Fill in the blank(s) with correct word