When a boat sails from fresh water to salt water, the boat will float
A) lower in the water.
B) higher in the water.
C) at the same water level.
Answer: B
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_________ is a form of electromagnetic radiation produced by rapidly moving electrons spiraling through magnetic fields
a. Lagrangian radiation b. Accretion c. Ultraviolet radiation d. Synchrotron radiation e. Infrared radiation
A star enters the main sequence when ________.
A. it forms planets B. nuclear fuel in its core can supply enough energy to stop its collapse C. it collapses, and its envelope becomes degenerate D. it stops fusing nuclear fuel in its core and starts to expand
How much energy is required to remove one proton from 9Be?
What will be an ideal response?
How could the children in this photo best improve their balance with the help of two equal-mass weights?
a. Hold one weight in each hand with arms extended as shown in the photo. b. Attach a weight to each ankle. c. Place a weight in each of their left and right pockets in their trousers. d. Hold one weight in each hand with arms held down instead of extended. e. Hold one weight in each hand with one arm extended and one held down.