As comets approach and move around the Sun, the coma and the tail ______________ in size
Fill in the blank(s) with correct word
increase
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There is oxygen in Earth's atmosphere because of plant life
a. True b. False Indicate whether the statement is true or false
A steel guitar string with a diameter of 0.300 mm and a length of 70.0 cm is stretched by 0.500 mm while being tuned. How much force is needed to stretch the string by this amount? Young's modulus for steel is 2.0 × 1011 N/m2
What will be an ideal response?
Mort and Velma are twins, born at the same time on Earth. Velma is taken on a long trip into outer space, at a speed close to lightspeed, and returns to Earth. When she returns,
A) Mort observes that he is younger than Velma, but Velma will observe that she is younger than Mort. B) Mort and Velma observe that they have aged equally. C) Mort observes that he is older than Velma, and Velma observes that she is older than Mort. D) Mort and Velma both observe that Velma is older than Mort. E) Mort and Velma both observe that Mort is older than Velma.
When an object is solely under the influence of conservative forces, the sum of its kinetic and potential energies does not change
A) True B) False