What do you call the attractive force resulting when polar molecules line up so that the positive and negative ends are close to each other?
dipole-dipole attraction
A man walks 30 m east and then 40 m north. What is the difference between his traveled distance and his displacement?
A. 0 m
B. 20 m
C. 50 m
D. 70 m
Using the Pythagorean theorem, calculate the magnitude of the man’s displacement: 50 m.
His total distance traveled is equal to 30 + 40 = 70 m. Therefore, the difference between these two is 20 m.
Does scar tissue in lungs affect inhalation or exhalation?
Paranoid delusions are associated with what disorder?
What is schizophrenia
Suppose that in a mammalian species, the allele for black hair (B) is dominant to the allele for brown hair (b), and the allele for curly hair (C) is dominant to the allele for straight hair (c). When an organism of unknown genotype is crossed against one with straight, brown hair, the phenotypic ratio is as follows:
25% curly black hair
25% straight black hair
25% curly brown hair
25% straight brown hair
What is the genotype of the unknown parent?
BbCc
What does the symbol, ΔHf° represent?
standard enthalpy of formation
An athlete runs around a 400 meter track in 60 seconds, starting and finishing at the same place. What is her speed and velocity in m/s?
A. Speed = 6.67 m/s and Velocity = zero
B. Speed = zero and Velocity = 6.67 m/s
C. Speed = 6.67 m/s and Velocity = 6.67 m/s 360o
D. Speed = 6.67 m/s and Velocity = 6.67 m/s
Correct Answer: A. Speed = 6.67 m/s and Velocity = zero
Speed is a scalar quantity involving magnitude only: Speed = distance/time = 400/60 = 6.67 m/s. Velocity is a vector quantity involving both magnitude and direction: Velocity = displacement/time = 0/60 = zero.
Distance traveled is not dependent on a direction, but displacement is. Displacement = distance from the finish to the start, which in this case is zero as the athlete has run around an oval to arrive back at her starting place.
What is the action of Insulin?
It lowers blood glucose by having cells uptake glucose.
All of the following are true statements about the brain EXCEPT:
A . The pons functions to link the cerebellum with the higher conscious centers
B . The limbic system alerts the cortex of incoming stimuli
C . The limbic system is associated with emotional responses
D . The nuclei of cranial nerves 5, 6, 7, and 8 are located in the pons
The correct answer is (C). If they did, our entire system of medical care would be swamped overnight and the doctors would be unable to take care of the more serious problems!