In which of these cases will a ripe banana appear black?
a) When illuminated with white light
b) When illuminated with blue light
c) When illuminated with yellow light
d) When illuminated with green light
e) When illuminated with red light
Ans: b) When illuminated with blue light
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Boiling water burns are less damaging than steam burns because boiling water
A) doesn't condense and release additional energy. B) has less energy per kilogram than steam. C) both of these D) none of the above
The continual stream of charged particles
projected outward from the Sun's surface into space are referred to as the a) solar wind. b) sunspot cycle. c) chromosphere. d) umbra.
What difference to resource lifetimes does the state of the economy make? Explain
What will be an ideal response?
A 3.0-kg mass is released from rest at point A of a circular frictionless track of radius 0.40 m as shown in the figure. The mass slides down the track and collides with a 1.4-kg mass that is initially at rest on a horizontal frictionless surface. If the masses stick together, what is their speed after the collision?
A. 2.1 m/s B. 1.7 m/s C. 1.9 m/s D. 1.5 m/s E. 2.3 m/s