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KiRa [710]
3 years ago
6

Diana would like to observe the movements of a paramecium. Which of the following tools would be best for Diana to use? A. hand

lens B. light microscope C. scanning electron microscope D. convex telescope
Physics
2 answers:
ra1l [238]3 years ago
8 0
Out of the choices given, the tool that would be best for Diana to use is the light microscope. The correct answer is B.
Ksivusya [100]3 years ago
5 0

Answer:

Option (B) is correct.

Explanation:

A light microscope is a device which is used to the highly magnified images of very tiny objects.

It consists of two convex lenses.

One is of short foal length called objective lens and the other is of large focal length called eyepiece.

They held co axially at the ends of a tube whose length is adjusted.

The final image formed is highly magnified, real and inverted image with respect to the object.

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two cars start at the same point and drive in a straight line for 5km. At the end of the drive their distances are the same but
Anna11 [10]

A 'displacement' always consists of a magnitude and a direction.  The two cars you just described have displacements with the same magnitude ... 5 km.  But if they didn't both drive in the same direction, then their displacements are different.

Remember:

-- 10 m/s² up and 10 m/s² down are different accelerations

-- 30 mph East and 30 mph West are the same speed but different velocity.

-- 5 km North and 5 km South are the same distance but different displacement.

7 0
3 years ago
A coin released at rest from the top of a tower hits the ground after falling 5.7 s. What is the speed of the coin as it hits th
Bad White [126]

Given parameters:

Initial velocity of Coin = 0m/s

Time taken before coin hits ground  = 5.7s

Unknown:

Final velocity of the coin  = ?

Velocity is displacement with time. To solve this problem, we have to apply one of the equations of motion.

The fitting one of them here is shown below;

             V = U + gt

where;

V is the final velocity

U is the initial velocity

g is the acceleration due to gravity

t is the time taken

Here we use positive value of acceleration due to gravity because the coin is falling with the effect of acceleration and not against it.

Now input the parameters and solve;

               V  = 0 + 9.81 x 5.7

               V = 55.917m/s

Therefore, the final velocity is 55.917m/s.

8 0
3 years ago
The law of conservation of mass applies to all chemical reactions.
serious [3.7K]
True. No matter can be created nor destroyed in pretty much every aspect of life, especially chemical reactions.
3 0
3 years ago
One of the world's largest Ferris wheels, the Cosmo Clock 21 with a radius of 50.0 m is located in Yokohama City, Japan. Each of
STatiana [176]

Answer:

a = 0.55 m / s²

Explanation:

The centripetal acceleration is given by the relation

         a = v² / r

angular and linear velocities are related

         v = w r

we substitute

          a = w² r

In the exercise they indicate the angular velocity w = 1 rev/min, let's reduce to the SI system

          w = 1 rev / min (2pi rad / 1rev) (1min / 60s) = 0.105 rad/ s

let's calculate

          a = 0.105² 50.0

          a = 0.55 m / s²

4 0
3 years ago
Scientists have been able to determine the numerical age of the most important events in history by using a combination of radio
STatiana [176]

Answer

Explanation:

The question was incomplete as the events are not given in the question. However the answer to your question is given as follows. The correct order of the events from youngest (top) to oldest (bottom) is given as follows.

 Moon formation

         ↑

  Earth formation

          ↑

Nuclear fusion in protosun

           ↑

     BigBang

3 0
3 years ago
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