A projectile is projected from the origin with a velocity of 30.0 m/s at an angle of 40.0 degrees above the horizontal. What is the time it takes the projectile to reach maximum height?
A. 2.66 s
B. 2.23 s
C. 1.97 s
D. 1.54 s
E. 1.02 s
C. 1.97 s
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What are interstellar grains?
A. the material out of which exoplanets are formed B. droplets of material that have condensed out of the Solar nebula C. tiny dust particles that are part of interstellar clouds D. leftover fragments of planetesimals that are blown out of the Solar System
The fluid to which Bernoulli's equation is applied is based on what being conserved for the fluid?
a. its momentum b. its potential energy c. its kinetic energy d. its total mechanical energy
Two equal and opposite forces of 6.0 N act on an object. The unbalanced force on the object
a. is 6.0 N. b. is 0 N. c. is 8 N. d. is 12 N. e. cannot be determined from given information.
The unusual nature of viruses (behaving as living organisms while within them, but becoming inert while isolated) has caused scientists to consider the possibility that:
A) viruses may be considered a kind of life. B) the ability to breathe may need to be added to the definition of life. C) the ability to evolve or mutate should be added to the definition of life. D) the ability to grow should be added to the definition of life. E) the definition of life may be more complex than a simple check list.