A force acts on an object for a time. If one eighth the force had acted for twice as long, the impulse would have been ________ as much as before.
What will be an ideal response?
one quarter
one fourth
a quarter
a fourth
1/4
0.25
.25
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During the period of one day, the number of high tides on the East or West coast is usually
A) five. B) one. C) two. D) four. E) three.
A 1000-kg car approaches an intersection traveling north at 20.0 m/s. A 1200-kg car approaches the same intersection traveling east at 22.0 m/s
The two cars collide at the intersection and lock together. Ignoring any external forces that act on the cars during the collision, what is the velocity of the cars immediately after the collision? A) 29.7 m/s in a direction 47.7° east of north B) 21.1 m/s in a direction 47.7° west of south C) 15.1 m/s in a direction 52.8° east of north D) 21.1 m/s in a direction 52.8° east of north E) 21.1 m/s in a direction 47.7° east of north
In epoxy and polyester thermoset polymers, liquid resin and liquid _________are mixed to form a liquid that transforms to a solid.
Fill in the blank(s) with the appropriate word(s).
A cold trap is set up to cause molecules to linger near the suction in a vacuum system. If the cold trap has an effective volume of 0.200 L and is maintained at how many molecules are in it at 10.0 Pa of pressure?
(Avogadro's number is 6.022 × 1023 molecules/mol, and the universal gas constant is 8.314 J/mol ? K. Assume the behavior of an ideal gas.) A) 1.11 × 1019 molecules B) 1.10 × 1022 molecules C) 7.71 × 1020 molecules D) 7.71 × 1023 molecules