A car is traveling north at 17.7 m/s After 12 s its velocity is 141m/s in the same direction. Find the magnitude and direction of the car's average acceleration
A) 0.30 m/s2, south B) 0.30 m/s2, north C) 2.7 m/s2, north D) 2.7 m/s2, south
A
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Young's Modulus: An aluminum wire 2.0 m long and 2.0 mm in diameter supports a 10.0-kg fixture. What is the stress in the wire? Young's modulus for aluminum is 7.0 × 1010 N/m2.
A. 3.1 × 107 N/m2 B. 6.2 × 107 N/m2 C. 9.3 × 107 N/m2 D. 1.2 × 108 N/m2
In a completely filled atomic shell,
a. the intrinsic spin of the electrons does not produce a resultant magnetic moment. b. the orbital motion of the electrons does not produce a resultant magnetic moment. c. the atom will be an alkali metal. d. only (a) and (b) are correct. e. none of the above are correct.
Potential: If it takes 50 J of energy to move 10 C of charge from point A to point B, what is the magnitude of the potential difference between points A and B?
A. 500 V B. 50 V C. 5.0 V D. 0.50 V
A magnetic field of 2.00 T is applied to a bubble chamber to make the tracks of protons and other charged particles identifiable by the radius of the circles they move in. If a high-energy proton moves along an arc of a 3.30-m circle, what is the momentum of the proton? [q = 1.60 × 10^?19 C, m = 1.67 × 10^?27 kg]