Draw the structural formula for 3-hexene
CH3CH2CH=CHCH2CH3
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A 1.6-kg block slides down a plane (inclined at 25° with the horizontal) at a constant speed of 2.0 m/s. At what rate is the frictional force changing the mechanical energy of the block?
a. +28 W b. +13 W c. ?13 W d. ?28 W e. +6.5 W
The diagrams below show forces applied to a wheel that weighs 20 N. The symbol W stands for the weight. In which diagram(s) is(are) the wheel in equilibrium?
a.
A
b.
B
c.
C
d.
D
e.
A and C
Star X has a smaller parallax angle than star Y. What can you conclude?
A) Star X is nearer to Earth than star Y. B) Star X is farther from Earth than star Y. C) Star X is more luminous than star Y. D) 10 Star X is less luminous than star Y. E) Star X is smaller in radius than star Y.
An object is at rest on the equator. Estimate its acceleration relative to the center of the Earth in m/s²
1.less than 0.001 2.between 0.001 and 0.01 3.between 0.01 and 0.1 4.between 0.1 and 1 5.between 1 and 10 6.between 10 and 100 7.between 100 and 1,000 8.between 1,000 and 10,000 9.more than 10,000 10.Impossible to determine