A small underwater pool light is 2.25 m below the surface of a swimming pool. What is the radius of the circle of light on the surface, from which light emerges from the water? (nwater = 1.333)
a. 3.90 m
b. 1.98 m
c. 2.55 m
d. 2.90 m
e. 1.69 m
c
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Impulse: A forklift pushes a 100-kg crate, starting from rest, with a horizontal force of magnitude F. The graph in the figure shows the x component of this force as a function of time. What is the instantaneous velocity of the crate at time t = 10 s?
A. 25 cm/s B. 0.00 cm/s C. 75 cm/s D. -25 cm/s E. -75 cm/s
The focal lengths of the objective and the eyepiece in a microscope are 0.290 cm and 2.50 cm, respectively. An object is placed 0.300 cm from the objective
The image of this object is viewed with the eyepiece adjusted for minimum eyestrain (image at the far point of the eye) for a person with normal vision. What is the distance between the objective and the eyepiece? A) 9.85 cm B) 10.1 cm C) 10.4 cm D) 11.2 cm E) 11.5 cm
Classify the following bonds as ionic, covalent, or neither (O, atomic number 8; F, atomic number 9; Na, atomic number 11; Cl, atomic number 17; U, atomic number 92)
O with F Ca with Cl Na with Na A) covalent, ionic, covalent B) ionic, covalent, neither C) neither, ionic, covalent D) covalent, ionic, neither
Determine the rms voltage drop across the inductor in the circuit
a.
11 V
b.
27.5 V
c.
33 V
d.
38.5 V
e.
30.5 V