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4 years ago

A reason that one typically does not notice a blind spot in the visual field is that

Physics

1 answer:

Sophie [7]4 years ago

3 0

Explanation:

Both of our eyes have a blind spot, in the retina of eye where there are no rods (light vision) or cons (color vision) cells. Its about a size of pinhead. The blind spot is place where the optic nerves exit the eye and connect to our brain. The problem is that we cannot notice this blind as the brain fills in information for us.

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A student measured the pH of four solutions. Which pH indicates the highest hydronium ion concentration? 3.2 7.0 9.1 12.4

aliya0001 [1]

Answer: 3.2

Explanation:

pH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration.

$pH=-\log [H_3O^+]$

$pH=log\frac {1}{H_3O^+}$

Thus as pH and $H^+$ are inversely related, a solution having lower pH will have more amount of $H^+$ concentration. And a solution having more pH will have less amount of $H^+$ concentration.

Thus the solution with lowest pH of 3.2 will have highest hydronium ion concentration.

3 0

4 years ago

Read 2 more answers

The least penetrating form of radiation is ____. a. beta radiation c. alpha radiation b. gamma radiation d. X rays

svet-max [94.6K]

C) alpha radiation seems to be the answer

8 0

3 years ago

Read 2 more answers

Determine the values of mm and nn when the following average magnetic field strength of the Earth is written in scientific notat

joja [24]

Answer:

m = 4.51 and n = -5

Explanation:

The average magnetic field strength of the Earth is 0.0000451 T. We need to write the value of magnetic field strength of the Earth in scientific notation. In scientific notation, any value is given by :

$N=m\times 10^n$ .........(1)

Where

m is a real number

n is any integer

Here,

$N=4.51\times 10^{-5}$ .......(2)

On comparing equation (1) and (2), we get the values as :

m = 4.51 and n = -5

Hence, this is the required solution.

6 0

3 years ago

____ is the thermal energy transfer that occurs from the motion of fluid in a liquid or gas.

Marysya12 [62]

The answer is C. Convection.

Radiation is the transfer of energy through electromagnetic waves. Conduction, on the other hand, is energy transfer through solid material. Condensation occurs when warm gas makes contact with a cold surface or environment, which causes a change in state from gas to liquid. These definitions rule out choices A, B, and D.

Convection is movement of particles in fluid or gas. As liquid/gas heats up, it becomes less dense and rises, moving away from the heat source. When it rises, it eventually cools down and sinks again. It is warmed up again and the cycle continues. This is why there is a circular motion when convection occurs.

6 0

4 years ago

Read 2 more answers

In the desert air, sound travels at 358 meters per second (m/s). In the polar air, sound travels at 330 meters per

Sati [7]

Answer:

The correct option is;

C. The temperature of the air affects the speed of sound

Explanation:

The information given are;

The speed with which sound travels in the desert air = 358 m/s

The speed with which sound travels in the polar air = 330 m/s

The major difference between the desert air and the polar air is that the temperature of the desert air is hotter than the temperature of the air in the polar region. Therefore the speed of sound is affected by the air temperature.

The equation that gives the relationship of the speed of sound in air, $v_{air}$ , to temperature is presented as follows;

$v_{air} = 331\frac{m}{s} \times \sqrt{\dfrac{T_K}{273 K} } = 331\frac{m}{s} \times \sqrt{1 + \dfrac{T_{^{\circ}C}}{273 ^{\circ} C} }$

Which shows that the speed of sound in air, $v_{air}$ , rises as the temperature of the air rises.

Where;

$T_{^{\circ}C}$ = The temperature of the air in degrees Celsius

$T_K$ = The temperature of the air in degrees Kelvin.

7 0

4 years ago