Your friend has set up a converging lens with a focal length of 22 cm. On one side of the lens, 22 cm from its center, she has an object. She is holding a white card on the
opposite side of the lens, but she can't get an image to form. What might be the
problem?

She is using a card instead of paper.
She has the card on the wrong side of the lens.
She has set the object at the secondary focus, a position where the lens will not
form an image.
She has set the object at the primary focus, a position where the lens will not
form an image.

Urgent pls a. coal consumption levels off and remains flat. b. petroleum, natural gas, and renewables show an increase in consumption c. more nonrenewable resources continued to be consumed than renewable. d. there is little projected increase in nuclear energy use. e. carbon dioxide emissions are projected to decline as we approach 2040. global energy consumption is defined as the total energy used by an individual or organizations from around the world. use the graph above to analyze the projected energy consumption from now until 2040. which statements in the prompt apply? a) a, b, d b) b, c, d c) a, c, d d) a, b, c, d

Apropagating wave in space with electric and magnetic components. these components oscillate at right angles to each other. it may travel in a vacuum. determine the term.

If the specific heat of a metal is 0.850 j/g °c, what is its atomic weight?