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Colt1911 [192]
3 years ago
13

Cells are visualized using light microscopes and electron microscopes. Which statement about microscopes is false. Group of answ

er choices
Transmission electron microscopes are mainly used to study cell surfaces.
Light microscopes have low resolution while electron microscopes have high resolution.
Light microscopes use light and glass objectives to illuminate and magnify objects
Electron microscopes focus electron beams to create a magnified image of an object.
Physics
1 answer:
denpristay [2]3 years ago
4 0

Answer:

Light microscopes use light and glass objectives to illuminate and magnify objects

Explanation:

Light microscopes and electron microscopes are used to study cells. The electron microscope has many times more resolving power than the ordinary light microscope. A light microscope contains an objective lens and an eyepiece through which the final image is seen.

Both light and electron microscopes magnifies the image of the object. The magnifying power of an electron microscope is many times that of the light microscope.

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A soccer player takes a free kick from a spot that is 20 m from the goal. The ball leaves his foot at an angle of 38 ∘, and it e
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This dude can kick the ball
7 0
3 years ago
Frictional force increases with the increase in the _______________ of the surface.
Sedaia [141]

Answer:

Frictional force increases with the increase in the roughness of the surface.

Explanation:

You will see that the rougher the surface, the greater the wear and tear.

7 0
3 years ago
Which change will always result in an increase in the gravitational force between two objects? increasing the masses of the obje
abruzzese [7]

By definition, we have that the gravitational force is given by:

F = \frac{G * m1 * m2}{r ^ 2}

Where,

G: gravitational constant

m1: mass of object number 1

m2: mass of object number 2

r: distance between both objects.

Therefore, for the gravitational force to increase, the following conditions must be met:

1) Increase the mass of the objects so that the numerator of the equation is greater.

2) Decrease the distance between the objects so that the denominator of the equation is smaller.

Answer:

A change that will always result in an increase in the gravitational force between two objects is:

increasing the masses of the objects and decreasing the distance between the objects

4 0
3 years ago
Read 2 more answers
How is the current controlled for a given voltage
Leni [432]

Answer:

The current can be controlled by modifying the resistance value

Explanation:

The current can be controlled by modifying the resistance value, usually a variable resistance device called potentiometer is used. This can be observed mathematically using the ohm law which is defined as voltage equal to the current product by resistance.

V = I*R

where:

I = current [amp]

R = resistance [ohm]

V = voltage [volt]

We can see that if we reduce the resistance the current will be increased

I = v / R

And if we amplify the resistance (R) the current will be diminished

6 0
4 years ago
If a net horizontal force of 7.5 N is applied to a baby carriage whose mass is 12.5 kg what acceleration is
11111nata11111 [884]

Answer:

<h2>0.6 m/s²</h2>

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

a =  \frac{f}{m} \\

f is the force

m is the mass

From the question we have

a =  \frac{7.5}{12.5}  \\

We have the final answer as

<h3>0.6 m/s²</h3>

Hope this helps you

8 0
3 years ago
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