A ball is thrown at a 60.0° angle above the horizontal across level ground. It is released from a height of 2.00 m above the ground with a speed of 16.0 m/s. How long does the ball remain in the air before striking the ground?
A)
16.2 s
B)
1.80 s
C)
2.05 s
D)
2.82 s
E)
2.96 s
E
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Spherical Mirrors: A concave spherical mirror with a radius of curvature of 20 cm creates a real image 30 cm from the mirror. How far is the object from the mirror?
A. 20 cm B. 15 cm C. 7.5 cm D. 5.0 cm
Element A, mass 10.00 g, reacts exactly with 2.00 g of element B to form 12.00 g of compound AB. If 5.00 g of element A is reacted with 2.00 g of element B to form the same compound, what mass of compound AB will be formed?
a. 7.00 g b. 6.00 g c. 17.00 g d. 12.00 g
Carnot Engine: An ideal Carnot engine is operated between a hot and a cold reservoir. The temperature difference between the two reservoirs is 284°C. If the efficiency of this ideal engine is 24.0%, find the temperature of the cold reservoir in degrees Celsius.
Fill in the blank(s) with the appropriate word(s).
Our Solar System:
is centrally positioned in the Milky Way galaxy. formed 10 billion years ago. has a massive, first-generation star at its center. completes one rotation around the center of the Milky Way every 250 million years. All of the above are true.