How many independent variables does a good investigator use in his or her experiment?

Answers

Answer 1

Answer:

Answer:

You should generally have one independent variable in an experiment. This is because it is the variable you are changing in order to observe the effects it has on the other variables.

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Related Questions

Sarah, who lives in Australia notices that the length of the shadow of the flagpole is getting shorter every day when measured at noon. Paul, who lives in Canada, notices that the length of the shadow of the flagpole is getting longer everyday when measured at noon.Explain how both students can be observing this at the same time. Include these in your explanation: Sun; earth; tilted axis; rotation and revolution.
Briefly explain how greenhouse gases, carbon dioxide in particular, can absorb and radiate heat inside Earth’s atmosphere and thereby contribute to the greenhouse effect.
Which object moves in simple harmonic motion?\a stretched rubber band with an massb rolling ball going down a hill c moving card orbiting satellite
Archimedes' principle says that a 15 N object is buoyed up by a force that is
Is it possible for an object's weight to change while its mass remains constant? Explain

A car goes 152 miles in 2 hours and 5 minutes. Calculate the car’s speed in units of m/s. 1 mi = 1600 m.

Answers

Answer:

The speed of the car is 32.4m/s

Explanation:

1mi = 1600m

152mi = 243 200m

2hr 5min = 7200s + 300s

= 7500s

speed = distance/time

= 243200/7500

= 32.4m/s (3s.f)

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A man is trying to drag a small tree that he cut down. If the static coefficientof friction of the tree on the ground is 0.5 and the tree weighs 480 N, what is
the minimum amount of horizontal force that the man will need to apply so
that the tree will start moving?

A. 240 N
B. 360 N
C. 480 N
D. 120 N

Answers

Answer:

120 N

Explanation: First we shoud consider the forces acted on a tree

Friction foce - acting opposite to the moving direction

Weight - Directly acting downwards

Reaction - Directly acting on upwards

For minimum required force should be equal to the friction force

F = μ R

F = 0.5×480

= 120N

In a game of pool why will the balls eventually stop after a collision

Answers

Everything we see happening on Earth has friction along with it.
For a pool ball, it's the work the ball does bending all the little cloth
fibers out of the way as it rolls along the table, and also the work it
does pushing air out of the way. These things rob a little bit of each
ball's kinetic energy, so that it eventually stops rolling.

Note: Gravity is not the answer.

What two motions combine to produce an orbit

Answers

The correct option for above statement is:

Gravity and Inertia

Explanation:

For instance, Gravity from our sun holds us at an essentially same range all the way around. It makes sure we don't sling off into the wisdom of our solar system. Inertia, keeps us in movement, if there were no inertia, our revolution would stop at a standstill. If we stayed, we would be sucked into the sun by its gravity.

Field motion ( as opposed to collision motion) which are forces like gravity. And Static motion ( as opposed to kinetic motion)
Static motion is where an object moves on or around another moving object. (Circular motion)

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How are Newton’s second and third laws of motion important to your everyday life?

Answers

Well, first off, Newtons second law of motion deals with the motion of accelerating and decelerating objects.
We already know that from everyday life examples such as simply pushing a car that if 2 people push a car on a flat road it will accelerate faster than if one person was pushing it... Therefore, there is a relationship between the size of the force and the acceleration.
Now onto the third law of motion. First of all, what is the third law of motion? Well, a force is a push or a pull that acts upon an object as a results of its interaction with another object. Forces result from interactions! According to Newtons third law, whenever one object, and another object interact with each other, they exert forces upon each other. "For every action, there is an equal and opposite reaction." The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. So, how is this important to everyday life you may ask?
Well, the action-reaction force pairs are found everywhere in your body.
For example, right now as I am typing, my tendons are exerting forces on bones, and those bones exert reaction forces on the tendons, as muscles contract, pulling my fingers on the keys. I press on those keys, and they press back on my fingers. See? Since im pressing on the keys, the press back on me. Its opposite from eachother, as stated in the quite above. "For every action, there is an equal and opposite reaction."
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Which of the following statements is true?Thunder is caused by the heating and expansion of air.
Light travels faster than sound.
Thunderstorms are most common during the summer.
all of the above

Answers

Answer:both of them are true

Explanation:please thank me and write me with 5 stars please and thank you

Answer:

both are true

Explanation:

thunder: when air molecules are heated, they expand. Sound waves move faster in warm air than they do in cool air. and The speed of light as it travels through air is much faster than that of sound.

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Explain why the temperature for freezing point and boiling point are the same.

Which of these is studied using science? a. thirteen is an unlucky numberb. finding a four leaf clover is luckyc. breaking a mirror brings bad weatherd. sudden fall in air pressure affects weather

Balance KOH+AlCl3 --> Al(OH)3 +KCL

You are driving at 35 m/s east and notice another car that is initially located 462 m in front of you and is moving east at 25 m/s. How far do you travel before you pass the other car?