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1 year ago

A red blood cell is 7 x 10-6 m in size. This means it is 7 __________ in size. What unit completes the sentence?

1 answer:

5 0

If a red blood cell is 7 x $10^-^6$ m in size, it means that such a cell is 7 microns or micrometer in size. The unit that completes the sentence will, thus, be microns or micrometer.

According to international system of measurement:

$10^{-1}$ m = decimeter

$10^{-2}$ m = centimeter

$10^{-3}$ m = millimeter
$10^{-6}$ m = micrometer or micron
$10^{-9}$ m = nanometer

Thus, a measurement of 7 x $10^-^6$ m is the same is 7 micons or 7 micrometer.

More on metric conversion can be found here: brainly.com/question/17767575

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when drawing a scatter diagram, along which axis is the explanatory variable placed? along which axis is the response variable p

eimsori [14]

The explanatory variable is placed on the x-axis and the response variable is placed on the y-axis.

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2 years ago

When air expands adiabatically (without gaining or losing heat), its pressure P and volume V are related by the equation PV1.4=C

DiKsa [7]

Answer:

$\frac{dV}{dt}=21.21cm^3/min$

Explanation:

We are given that

$PV^{1.4}=C$

Where C=Constant

$\frac{dP}{dt}=-7KPa/minute$

V=420 cubic cm and P=99KPa

We have to find the rate at which the volume increasing at this instant.

Differentiate w.r.t t

$V^{1.4}\frac{dP}{dt}+1.4V^{0.4}P\frac{dV}{dt}=0$

Substitute the values

$(420)^{1.4}\times (-7)+1.4(420)^{0.4}(99)\frac{dV}{dt}=0$

$1.4(420)^{0.4}(99)\frac{dV}{dt}=(420)^{1.4}\times (7)$

$\frac{dV}{dt}=\frac{(420)^{1.4}\times (7)}{1.4(420)^{0.4}(99)}$

$\frac{dV}{dt}=21.21cm^3/min$

5 0

2 years ago

Read 2 more answers

What parameters we control through a valve?

liq [111]

Answer:

Control valves are used in many processes to control flow, pressure, temperature or other variables. The type of valve used will depend on the size of the pipe, the overall pressure that the system operates, the flowing media, process conditions, and other factors.

Also

A control valve is a valve used to control fluid flow by varying the size of the flow passage as directed by a signal from a controller. This enables the direct control of flow rate and the consequential control of process quantities such as pressure, temperature, and liquid level.

Hope this helps :)

Pls brainliest...

8 0

2 years ago

Which involves more work in the scientific sense: moving the boxes and the furniture down from the second floor or up to the fif

Advocard [28]

Answer:

moving the boxes and the furniture up to the fifth floor.

Explanation:

The work done when moving an object up or down is equal to its change of gravitational potential energy:

$W=mg \Delta h$

where

m is the mass of the object

g is the gravitational acceleration

$\Delta h$ is the change in height of the object

We have two opposite situations:

1) when an object is moved upward, $\Delta h$ is positive, so the work done W is positive as well: this means that we need to do work in order to move the object, because we have to "win" the effect of gravity, which pulls the object downward

2) when an object is moved downward, $\Delta h$ is negative, so the work done W is negative as well: this means that we do not need to do work on the object, because it is already done by gravity, which pulls the object downward.

Therefore, more work is done when we are moving the boxes and the furniture up to the fifth floor.

8 0

2 years ago

100 meters toward the shore in 25 seconds

Rzqust [24]

Answer:

The speed of a turtle is 4m/s

Explanation:

speed = distance/time

distance = 100m

time = 25s

s = 100/25

= 4m/s

6 0

3 years ago