A firecracker breaks up into two pieces, one of which has a mass of 200 g and flies off along the +x-axis with a speed of 82.0 m/s. The second piece has a mass of 300 g and flies off along the +y-axis with a speed of 45.0 m/s
What is the total momentum of the two pieces? A) 361 kg ? m/s at 56.3° from the +x-axis
B) 93.5 kg ? m/s at 28.8° from the +x-axis
C) 21.2 kg ? m/s at 39.5° from the +x-axis
D) 361 kg ? m/s at 0.983° from the +x-axis
E) 21.2 kg ? m/s at 56.3° from the +x-axis
C
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If a Burger’s circuit is performed around a dislocation, the Burger’s _____________closes the circuit.
Fill in the blank(s) with the appropriate word(s).
The surface rocks on Venus are similar to ____ rocks on Earth
a. oxide-rich b. anorthosite c. sedimentary d. granitic e. basaltic
Dust and smoke blown up into the Earth's atmosphere from the massive impact of an asteroid 65 million years ago
A) removed most of the oxygen in the Earth's atmosphere by oxidation B) rapidly escaped into space, having very little effect on the Earth's climate C) blocked sunlight, causing global temperatures to fall on the Earth and subsequently shutting down photosynthesis for up to a year D) trapped heat in the Earth's atmosphere, causing global temperatures to rise
A crate is acted upon by a net force of 100 N. An acceleration of 4.0 m/s2 results. The weight of the crate is
A. 245 N. B. 25 N. C. 25 lb. D. 245 lb. E. 25 kg.