The position x(t) of a particle as a function of time t is given by the equation x(t) = (3.5 m/s)t - (5.0 m/s2)t2. What is the average velocity of the particle between t = 0.30 s and t = 0.40 s?
What will be an ideal response?
0.00 m/s
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The astronauts feel weightless in the International Space Station, which orbits the Earth once every 90 minutes. Why?
A) because they are moving so fast B) because the gravity from the Moon cancels out the gravity from Earth C) because they and the space station are both falling around the Earth D) because there is no gravity in space
A supernova remnant, such as the Crab nebula, is heated by the ________
Fill in the blank(s) with correct word
The metamorphic property of flat or elongated mineral grains in parallel layers is called
A) schist. B) cleavage. C) foliation. D) lithification.
pressure drop of 200 kPa is measured over a 50-m-length of 2-mm-diameter pipe transporting 30°C water. If a laminar flow exists, the flow rate is nearest:
(A) 0.00195 L/s (B) 0.00243 L/s (C) 0.00732 L/s (D) 0.00991 L/s