You are conducting an experiment with a converging lens and have set it up to produce a real image of a tree in the distance. You then cover the top half of the lens with opaque paper. What occurs?

A. The bottom half of the image is missing
B. Nothing happens
C. The image becomes half as large
D. The image is complete, but dimmer than it was
E. The top half of the image is missing


D. The image is complete, but dimmer than it was

Physics & Space Science

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Energy and Mass: A 1.0-kg aluminum ingot is heated from 0°C to 100°C. By what amount does its mass change? The specific heat of aluminum is 900 J/kg ? K. (c = 3.0 × 108 m/s)

A. Its mass does not change. B. Its mass increases by 0.50 × 10-12 kg C. Its mass decreases by 0.50 × 10-12 kg D. Its mass increases by 1.0 × 10-12 kg E. Its mass decreases by 1.0 × 10-12 kg

Physics & Space Science

When water boils, its temperature increases

Indicate whether the statement is true or false

Physics & Space Science

Matter Waves: Electrons with a speed of 2.1 × 106 m/s are directed towards a 1.0-?m wide slit. An electron detector is placed 1.0 m behind the slit. How wide is the central maximum of the electron diffraction pattern on the detector? (h = 6.626 × 10-34 J ? s, melectron = 9.11 × 10-31 kg)

A. 690 ?m B. 350 ?m C. 1000 ?m D. 1400 ?m

Physics & Space Science

Kirchhoff's Rules: Determine the current in the 12-? resistor for the circuit shown in the figure assuming that the batteries are ideal.

A. 0.25 A B. 0.50 A C. 0.75 A D. 1.0 A

Physics & Space Science