A 4.00 kg ball is moving at 4.00 m/s to the EAST and a 6.00 kg ball is moving at 3.00 m/s to the NORTH. The total momentum of the system is
A. 14.2 kg m/s at an angle of 48.4 degrees SOUTH of EAST.
B. 48.2 kg m/s at an angle of 24.2 degrees SOUTH of EAST.
C. 48.2 kg m/s at an angle of 48.4 degrees NORTH of EAST.
D. 24.1 kg m/s at an angle of 24.2 degrees SOUTH of EAST.
E. 24.1 kg m/s at an angles of 48.4 degrees NORTH of EAST.
E. 24.1 kg m/s at an angles of 48.4 degrees NORTH of EAST.
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Tricia puts 66 g of dry ice (solid CO2) into a 2.0-L container and seals the top. The dry ice turns to gas at room temperature (20°C). Find the pressure increase in the 2.0-L container. (One mole of CO2 has a mass of 44 g and R = 0.0821 L•atm/mol•K. Ignore the initial volume of the dry ice.)
a. 6.0 atm c. 18 atm b. 12 atm d. 2.0 atm
_________hardening is the least expensive process for strengthening metals, because no expensive alloy elements are added, and it is only necessary to deform the metal with standard deformation processes.
Fill in the blank(s) with the appropriate word(s).
Which of the following terms is given to a pair of stars that appear to change positions in the sky, indicating that they are orbiting one another?
A) visual binary B) eclipsing binary C) spectroscopic binary D) double star E) none of the above
An M star is hotter than an O star
Indicate whether the statement is true or false