What are the minimum and maximum values for declination in the sky for both north and south?
What will be an ideal response?
From the equator at 0 degrees, to +90 degrees for the north celestial pole, and down to -90 degrees for the south celestial pole.
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Vector A has a magnitude of 3.0 units and makes an angle of -90.0
with the positive x-axis. Vector B has a magnitude of 4.0 units and makes an angle of -120
with the positive x-axis. What is the magnitude of the vector sum of A + B?
A. 1.0 units B. 6.8 units C. 4.0 units D. -6.8 units
In the past, Earth has been hit by many asteroids, some very large. Suppose one such asteroid approached Earth so that when it was very far away it was traveling at 6500 m/s along a line that would miss the center of Earth by 8,500,000 m
Because of the gravitational attraction of Earth, it departed from this straight line and curved towards Earth, colliding with it. What was the speed of this asteroid when it hit Earth if we ignore the effect of the sun? The mass of Earth is 5.97 × 1024 kg, its radius is 6.38 × 106 m, and G = 6.67 × 10-11 N ? m2/kg2. A) 11400 m/s B) 12900 m/s C) 13700 m/s D) 15800 m/s E) 16400 m/s
The motion of a piston in an auto engine is simple harmonic. If the piston travels back and forth over a distance of 10 cm, and the piston has a mass of 1.5 kg, what is the maximum speed of the piston and the maximum force acting on the piston when the engine is running at 4 200 rpm?
Earth's core is hot, dense, and mostly composed of iron and nickel
a. True b. False Indicate whether the statement is true or false