A dolphin perceives its environment by the sense of
A) sight.
B) sound.
C) both of these
D) neither of these
Answer: C
You might also like to view...
Which of the following statements is true of red dwarfs?
A) They have very little weight to support. B) Their life expectancies are very short. C) Their pressure-temperature thermostats are set high. D) They consume their hydrogen fuel at a rapid rate.
Photons of energy 4.20 eV bombard a surface, which emits photoelectrons with kinetic energies for 0 to 1.80 eV. What is the threshold frequency for this surface?
a. 
b. 
c. 
d. 
e. 
Incompressible water flows out of a large reservoir through a pipe that opens to the atmosphere 5.70 m below the level of the water in the reservoir. What is the speed of the water as it comes out of the pipe?
A) 1.72 m/s B) 7.47 m/s C) 55.8 m/s D) 10.6 m/s E) 27.9 m/s
Planets would crash into the Sun if it weren't for
A) their tangential velocities. B) their vast distances from the Sun. C) the inverse-square law. D) their relatively small masses. E) the fact that they are beyond the main gravitation of the Sun.