Linear momentum is conserved in __________ collisions
Fill in the blank(s) with correct word
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The only two forces acting on a body have magnitudes of 20 N and 35 N and directions that differ by 80°. The resulting acceleration has a magnitude of 20 m/s2. What is the mass of the body?
A. 2.4 kg B. 2.2 kg C. 2.7 kg D. 3.1 kg E. 1.5 kg
How much energy is needed to change the speed of a 1600 kg sport utility vehicle from 15.0 m/s to 40.0 m/s?
A) 1.10 MJ B) 10.0 kJ C) 0.960 MJ D) 20.0 kJ E) 40.0 kJ
A baseball has a mass of 0.15 kg. If pitched at 40.0 m/s with a relative uncertainty of 1%, how uncertain is its position?
A. 9.1 x 10-34m B. 5.7 x 10-34m C. 1.8 x 10-34m D. 6.3 x 10-33m
We are not yet capable of detecting life on planets around other stars. But as our technology develops, our first real chance of detecting such life will probably come from
A) sending spacecraft to study the planets up close. B) examining spectral lines from the atmospheres of distant planets. C) examining high-resolution images of the planets made by orbiting telescopes. D) determining the orbital properties of the planets.