Transformers: The primary of an ideal transformer has 100 turns and its secondary has 200 turns. If the input current at the primary is 100 A, we can expect the output current at the secondary to be
A. 50 A.
B. 100 A.
C. 200 A.
D. none of the given answers.
Answer: A
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Addition by 1. Components: An airplane undergoes the following displacements, all at the same altitude: First, it flies 59.0 km in a direction 30.0° east of north. Next, it flies 58.0 km due south. Finally, it flies 100 km 30.0° north of west. Use components to determine how far the airplane ends up from its starting point.
A. 71.5 km B. 73.0 km C. 74.4 km D. 70.1 km E. 68.7 km
The value 1.38 × 10^?23 J/K is known as:
a. the universal gas constant. b. Boltzmann's constant. c. Avogadro's number. d. the molar specific.
An object is placed 50 cm in front of a concave mirror with a focal length of 25 cm. What is the magnification produced by the mirror?
A) -0.50 B) -1.0 C) +1.5 D) -2.0 E) +1.0
Briefly explain why sunspots are cooler than surrounding regions of the Sun and why they look dark in photos
What will be an ideal response?