A dentist uses a concave mirror (focal length 2 cm) to examine some teeth. If the distance from the object to the mirror is 1 cm, what is the magnification of the tooth?
a. 6
b. 1
c. 4
d. 2
e. 1.5
d
Physics & Space Science
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Acceleration: If the velocity of an object is zero, then that object cannot be accelerating.
A. True B. False
Physics & Space Science
What is to the proper number of significant figures?
A) 0.91 B) 0.911 C) 0.9108 D) 0.9
Physics & Space Science
A car goes around a circular curve on a horizontal road at constant speed. What is the direction of the friction force exerted on the car by the road?
A) tangent to the curve in the forward direction B) tangent to the curve opposite to the direction of the car's motion C) perpendicular to the curve outward D) perpendicular to the curve inward E) There is no friction on the car because its speed is constant.
Physics & Space Science
Matter waves are also called ______________ waves
Fill in the blank(s) with correct word
Physics & Space Science