The hormonal, cardiovascular, central nervous and respiratory systems are all involved in this response.
The body is equipped to respond to emergency situations through the fight and flight hormones secreted by the adrenal gland. This chemical messengers send a message to the brain which now causes reactions such as increased pumping of blood by the heart and a faster breathing rate by the lungs.
Hence, the hormonal, cardiovascular, central nervous and respiratory systems are all involved in this response.
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b. 2 times
c. 1/4
d. 4 times
Answer : The correct option is, (d) 4 times
Solution :
According to the Coulomb's law, the electrostatic force of attraction or repulsion between two charges is directly proportional to the product of the charges and is inversely proportional to the square of the distance between the the charges.
Formula used :
where,
F = electrostatic force of attraction or repulsion
= Coulomb's constant
and are the charges
r = distance between two charges
First we have to calculate the force exerted between S and q when the distance between the charge is 1 unit and let us assumed that the charge be 'q'
..........(1)
Now we have to calculate the force exerted between S and p when the distance between the charge is 2 unit at the same charge.
...........(2)
Equation equation 1 and 2, we get
Therefore, the force exerted between S and q is 4 times the force exerted between S and p.
I believe the answer is "4 times".
a. True
b. False
Convex lenses can produce upright images.
Convex lenses cause light rays to spread out.
Convex lenses cause light rays to refract
Answer: The correct answer is convex lenses can produce images larger than objects.
Explanation:
Convex lens is a type of spherical lens in which two spherical surface bulge outwards. This type of lens is known as double convex lens or simply convex lenses.
These lenses are known as converging lenses because they converge the light rays passing through it to one point. The image formed by these lens depends on the location of the object. In one case, it produces an enlarged image.
Concave lenses only produces only image which is reduced in size than the object.
In microscopes, the object used is very very small and to view its enlarged image, only convex lenses are used.
Hence, the correct answer is convex lenses can produce images larger than objects.
b. trough.
c. crest.
d. wavelength
The highest point of a wave is called the "crest." A wave is a disturbance that travels through a medium or space, transferring energy without transporting matter. Therefore, the correct answer is option c.
As a wave propagates, it undergoes cycles of oscillation with alternating high and low points. The highest point of a wave, where the displacement or amplitude is at its maximum, is referred to as the "crest." On the other hand, the term "trough" refers to the lowest point of a wave, where the displacement or amplitude is at its minimum in the negative direction. The trough is the opposite of the crest, representing the bottommost part of a wave.
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the answer is c , crest