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3 years ago

A __________ is often written as an if/then statement. prediction law theory guess

2 answers:

4 0

A hypothesis is often written as an if/then statement or prediction law theory guess. A hypothesis is also known as an educated guess.

Your answer is: Hypothesis

Have an amazing day!

zmey [24]3 years ago

4 0

Answer:

The correct answer is hypothesis.

Explanation:

Hello!

Let's solve this!

Hypothesis is a guess after seeing the data you have from a previous research.

It is written as an if / then statement.

The correct answer is hypothesis.

The complete sentence is:

A hypothesis is often written as an if / then statement.

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How much heat is needed to raise the temperature of 2 kg of copper from 20º to 30ºC. The specific heat of copper is 390 J/kgºC.

ryzh [129]

Answer:

7800 J

Explanation:

Heat needed = mass of copper x specific heat of copper x change in temperature

Change in temperature = 30ºC - 20ºC = 10ºC

Specific heat of copper = 390 J/kgºC

Mass of copper = 2 Kg

Substituting the given values in above equation, we get –

Heat needed = 2 Kg x 390 J/kgºC x 10ºC

= 7800 J

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3 years ago

Energy can be changed from one form to another. Which terms can be used to describe these changes? Check all

Ne4ueva [31]

Answer:

the answer is Energy conversion

Explanation:

I hope this helped

7 0

2 years ago

In 1996, NASA performed an experiment called the Tethered Satellite experiment. In this experiment a 4.32 x 104-m length of wire

elena55 [62]

Answer:

Explanation:

Length, l = 4.32 x 10^4 m

speed, v = 7.07 x 10^3 m/s

magnetic field, B = 5.81 x 10^-5 T

The formula for the motion emf is given by

e = B x v x l

e = 5.81 x 10^-5 x 7.07 x 10^3 x 4.32 x 10^4

e = 17745.1 V

3 0

3 years ago

Plz help........................

hoa [83]

Answer:

The correct wording is

Pressure increases with the depth of the fluid.
A plane's engines produce thrust to push the plane forward.
A fluid can be a liquid or a gas.
A hydraulic device uses Pascal's principle to lift or move objects.
lift is the upward force exerted on objects by fluids.

Explanation:

1. As you go deeper into a fluid, there is more of it on top of you; therefore, the pressure excreted on you is greater.

2. A plane's engines pushes the air in opposite direction, which according to newton's third law, produces necessary force to move the plane forward.

3. A fluid has no fixed shape, and it deforms under the influence of external forces applied—liquid and gases fit into this definition.

4. Pascal's principle says that pressure applied on one region of the fluid must equal pressure transmitted to another region of the same fluid. This principle is used in a hydraulic device to exert forces on fluids to lift objects that would otherwise be difficult to move.

5. By definition, the upward force exerted by the fluids on objects is the lift.

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3 years ago

Which statement about thin lenses is correct? In each case, we are considering only a single lens. A. A diverging lens always pr

Alexus [3.1K]

Answer:

E) true. The image is always virtual and erect

Explanation:

In this exercise we are asked to find the correct statements,

for this we can use the constructor equation

1 / f = 1 / p + 1 / q

where f is the focal length, p the distance to the object and q the distance to the image

In diverging lenses, the focal length is negative and the image is virtual and erect

In convergent lenses, the positive focal length, if the object is farther than the focal length, the image is real and inverted, and if the object is at a shorter distance than the focal length, the image is virtual and straight.

With this analysis let's review each statement

A) False. The image is right

B) False. The type of image depends on where the object is with respect to the focal length

C) False. The real image is always inverted

D) False. The image is always virtual

E) true. The image is always virtual and erect

6 0

3 years ago