Helium fusion requires a higher temperature than hydrogen fusion
Indicate whether the statement is true or false
TRUE
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Barbara travels 20. km Northward, then travels 40. km Eastward, then continues for 50. km in a Southward direction. What displacement will now take her back to her initial position?
A) 30. km Westward + 40. km Northward B) 50. km Northwest C) 40. km Westward + 30. km Northward D) 30. km Northward + 30. km Westward E) 40. km Eastward + 30. km Southward
A concave spherical mirror with a radius of 20 cm creates a real image 30 cm from the mirror. How far is the object from the mirror?
A) 50 cm B) 5.0 cm C) 20 cm D) 15 cm E) 7.5 cm
What is the change in area (in cm2) of a 60.0 cm by 150 cm automobile windshield when the temperature changes from 0° C to 36.0° C. The coefficient of linear expansion of this glass is 9.0 × 10^-6/°C
a. 1.6 b. 2.9 c. 3.2 d. 4.9 e. 5.8
Conversion of Units: A speed of 60 mi/h is closest to which of the following? (2.54 cm = 1.00 in.)
A. 60 m/s B. 20 m/s C. 30 km/h D. 120 m/s E. 30 m/s