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3 years ago

The smallest level of organization in living things is

1 answer:

6 0

The smallest level of organization in living things is the atom.

Next in line would be the cell, since a cell is made up of atoms working together. Next, cells working together would make up a tissue, and further, tissues working together would make up an organ.

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A charge of 31.0 μC is to be split into two parts that are then separated by 24.0 mm, what is the maximum possible magnitude of

miskamm [114]

Answer:

1.72 x 10³ N.

Explanation:

When a charge is split equally and placed at a certain distance , maximum electrostatic force is possible.

So the charges will be each equal to

31/2 = 15.5 x 10⁻⁶ C

F = K Q q / r²

= $\frac{9\times10^9\times(10.5)^2\times10^{-12}}{(24\times10^{-3})^2}$

= 1.72 x 10³ N.

8 0

3 years ago

A 10-cm-long wire is pulled along a u-shaped conducting rail in a perpendicular magnetic field. the total resistance of the wire

Debora [2.8K]

In the above case we can say that power given by external agent to pull the rod must be equal to the power dissipated in the form of heat due to magnetic induction.

Part a)

when we pull the rod with constant speed then power required will be product of force and velocity

here we will have

$P = F.v$

P = 4 W

v = 4 m/s

now we will have

$4 = F*4$

$F = 1N$

So external force required will be 1 N

PART B)

now in order to find magnetic field strength we can say

$P = \frac{v^2B^2L^2}{R}$

here we know that induced EMF in the wire is E = vBL

so power due to induced magnetic field is given by

$P = \frac{E^2}{R}$

$4 = \frac{4^2*B^2*0.10^2}{0.20}$

by solving above equation we will have

$B = 2.24 T$

5 0

3 years ago

Suppose a radio signal (light) travels from Earth and through space at a speed of 3 × 10^8/ (this is the speed of light in vacuu

zlopas [31]

Answer:

Explanation:

we know that

s=vt here v is the speed and s is distance covered by the signals

given data

v=3*10^8

t=10 min we have to convert it into seconds

1 minute=60 seconds

10 minutes =10*60/1 =600 seconds

now putting the value of v and t we can find the value of s

s=vt

s=3*10^8*600

s=1.8*10^11m

i hope this will help you

8 0

3 years ago

the core of the earth is made of iron.if the core of the earth is about 10300 degrees Fahrenheit,why then is the core melting in

Citrus2011 [14]

melting point iron less than 10300

7 0

3 years ago

As you walk to class with a constant speed of 1.60 m/s, you are moving in a direction that is 15.0° north of east. How long does

Alina [70]

<h2>a)Time taken is 12.90 seconds</h2><h2>b) Time taken is 72.46 seconds</h2>

Explanation:

Let east be positive x axis and north be positive y axis

Speed = 1.60 m/s in a direction that is 15.0° north of east.

Speed, v = 1.60 cos 15 i + 1.60 sin 15 j = 1.55 i + 0.414 j m/s

a) We need to find time taken to travel 20 m along east

Speed along east = 1.55 m/s

Distance = Speed x Time

20 = 1.55 x Time

Time = 12.90 seconds

Time taken is 12.90 seconds

b) We need to find time taken to travel 30 m along north

Speed along north = 0.414 m/s

Distance = Speed x Time

30 = 0.414 x Time

Time = 72.46 seconds

Time taken is 72.46 seconds

4 0

3 years ago