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3 years ago

What variable did the researchers intentionally vary in the experiment

Physics

1 answer:

Dima020 [189]3 years ago

6 0

Answer: Dependent Variable

Explanation:

There are two types of variable in any kind of experiment:

Independent Variable which are mostly known as inputs

Dependent Variables which are mostly known as outputs

In any experiment, the researches focus on observing the output values (dependent variables) by intentionally changing the inputs (Independent variables).

e.g. If we are observing the strain on any object, we try to change the value of stress on that particular object.

Here strain is a dependent variable whereas stress is an independent variable because it doesn't depend on whatever the value of strain may be.

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If Sarah melts 10g of tin. What mass of melted tin would she have at the end of the experiment?

Nastasia [14]

Answer:

10g

Explanation:

As the Law of Conservation of Mass states that " Mass can neither be created nor be destroyed in a chemical reaction".

Though melting of tin isn't a chemical change, the same logic is applied here...

Hence,

The mass of tin will be 10 g itself...

7 0

3 years ago

Read 2 more answers

HELP PLEASEE

lozanna [386]

Answer:

Usually an eletric shock. You can be left with numbness and MAYBE problems with your eyes.

Explanation:

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2 years ago

A 2,200-kg pile driver is used to drive a steel I-beam into the ground. The pile driver falls 3.40 m before coming into contact

love history [14]

Answer:

The magnitude of Force is 8.58×10⁵N and direction is upwards

Explanation:

The work beam does on the pile driver is given by

W=(FCos180°)Δx= -F(0.088m)

From work energy theorem

$W_{nc}=(KE_{f}-KE_{i})+(PE_{f}-PE_{i})\\W_{nc}=1/2m(vf^{2}-vi^{2})+mg(yf-yi)$

Choosing y=0 at the the level where the driver first contacts the beam and vi=0 at yi=+3.40m and comes to rest again vf=0 at yf= -0.088m

$-F(0.088m)=1/2m(0-0)+2,200kg(9.81m/s^{2} )(-0.088m-3.40m)\\-F(0.088)=-75508.224\\F=75508.224/0.088\\F=8.58*10^{5} N$

The magnitude of Force is 8.58×10⁵N and direction is upwards

6 0

3 years ago

Vascular resistance is the friction force that opposes blood flow in a blood vessel. what two factors are the most important in

makvit [3.9K]

The two most important factors are Systematic Vascular Resistance as and Vascular Resistance.

6 0

3 years ago

PLEASE HELP ME , it’s my exam

tatyana61 [14]

Answer:

I only know how to answer 22

which is 250 J

Explanation:

KE: 1/2 mv^2

m- 5kg

v- 10 m/s

KE: 1/2 × 5 × 10^2

= 250 J

5 0

3 years ago