A car travels east and its velocity decreases. The acceleration of the car is in which of the following directions?
A) Eastward
B) Westward
C) Northward
D) Southward
E) Downward
B
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Free Fall: A ball is thrown downward from the top of a building with an initial speed of 25 m/s. It strikes the ground after 2.0 s. How high is the building, assuming negligible air resistance?
A. 20 m B. 30 m C. 50 m D. 70 m
The capacitance of a parallel plate capacitor is directly proportional to its plate separation
Indicate whether the statement is true or false
A square coil, enclosing an area with sides 2.75 cm long, is wrapped with 1 875 turns of wire. A uniform magnetic field perpendicular to its plane is turned on and increases to 0.390 T during an interval of 1.70 s. What average voltage is induced in the coil?
a. 0.325 V b. 0.553 V c. 1.73 V d. 0.118 V e. 1.82 V
A deuteron, with the same charge but twice the mass of a proton, moves with a speed of 6.0 × 10^5 m/s perpendicular to a uniform magnetic field of 0.20 T. Which of the paths described below would it follow? (qp = 1.6 × 10^-19 C and md = 3.34 × 10^-27 kg)
a. a circular path of 6.3-cm radius c. a circular path of 3.1-cm radius b. a circular path of 1.6-cm radius d. a straight line path