An object and a screen are separated by 15.0 cm. A convex lens is placed between them, 6.82 cm from the object. In this position it causes a sharp image of the object to form on the screen. What is the focal length of the lens?
a. 4.69 cm
b. 41.0 cm
c. 3.72 cm
d. 12.5 cm
e. 4.09 cm
c
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Alternating zones of rising and sinking gas in Jupiter's atmosphere:
A) create light and dark bands. B) cause Jupiter's magnetic field to ripple. C) produced the ring system discovered by Voyager. D) generate their own magnetic fields. E) circle the planet from pole to pole.
Explain why the term acceleration is important to the first postulate of special relativity
What will be an ideal response?
What is released from the proton-proton chain and is immediately absorbed by the surrounding gas, thereby heating it?
a. positrons b. gamma rays c. deuterium d. electron motion e. neutrinos
A 100 kg crate is attached to a rope wrapped around the inner disk as shown. A person pulls on another rope wrapped around the outer disk with force F to lift the crate
What force F is needed to lift the crate 2 m?