At t = 0, a wheel rotating about a fixed axis at a constant angular acceleration of -0.40 rad/s2 has an angular velocity of 1.5 rad/s and an angular position of 2.3 rad. What is the angular position of the wheel at t = 2.0 s?
a. 4.9 rad
b. 4.7 rad
c. 4.5 rad
d. 4.3 rad
e. 4.1 rad
C
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Energy in Nuclear Reactions: Consider the nuclear reaction N +
He ?
O +
H. The known atomic masses are
N: 14.003074 u
/>He: 4.002603 uH: 1.007825 u
O: 16.999131 uWhat is the Q-value (or reaction energy) of this reaction? (1 u = 931.5 MeV/c2)
A. 1.191 MeV
B. -1.191 MeV
C. 1.279 × 10-3 MeV
D. -1.279 × 10-3 MeV
What is the minimum amount of energy required for a 70.0-kg climber carrying a 20.0-kg pack to climb Mt. Everest, which is 8850 m high?
a. 8.67 MJ c. 4.41 MJ b. 7.81 MJ d. 0.900 MJ
The vertical speed of a projectile
a. is zero b. stays constant c. continuously increases d. continuously decreases e. sometimes decreases and sometimes increases
Which of the following types of cloud is found at the highest altitudes?
What will be an ideal response?