Beneath the surface of which moon of Jupiter is there the strongest evidence for the existence of a subsurface ocean of liquid water?
A) Io
B) Callisto
C) Europa
D) Ganymede
C
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Activation energy is the energy required to bring reactant bonds to:
a. an enzyme b. their strongest conformation c. a reducing agent d. their breaking point e. a high energy state
The figure shows the distance versus time graph of an object
The acceleration of the moving object is
a.
zero.
b.
constant.
c.
increasing.
d.
decreasing.
e.
not determinable.
Suppose that Al the physicist observes a single radioactive nucleus. The length of time until that particular nucleus decays is
A) unpredictable because of the practical difficulties of obtaining all the information needed to make the prediction. B) unpredictable because of fundamental uncertainties arising from quantum physics C) predictable from the known half-life of the nucleus. D) unpredictable because of fundamental uncertainties arising from Newtonian physics. E) predictable, provided Al knows the precise nuclear state of this nucleus.
A 2200 kg truck is decelerated from 22 m/s to 12 m/s in 3.2 s, as its driver sees a deer wander into the road. What was the magnitude of the net force that slowed the truck?
A. 8.3 kN B. 23.4 kN C. 6.9 kN D. 15.1 kN