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3 years ago

All of the following would be questions that could be scientifically investigated except:

Physics

2 answers:

Law Incorporation [45]3 years ago

8 0

Answer: option A: <u>What is the proper number of children to have in today's family?</u>

A scientific investigation includes a scientific method to approach a problem. There is a systematic approach is used to address a problem. It generally includes five steps: first a problem needs to be identified. Thereafter, a background research is important to form a hypothesis. Fourthly, an experiment, observation or measurements are done in order to draw conclusions at last.

From the given questions, option A is a question which cannot be scientifically investigated. This is because, it varies from individual to society to the economy of a state. The conclusion would not be generalized solution.

option B.Will equal sizes of Styrofoam and wood have the same mass? can be scientifically investigated. The given quantities can be measured and tested.

C. Does adding salt to water raise its boiling point? This can be scientifically tested

D. Does lack of sunlight affect plant growth? This can also be scientifically measured.

ra1l [238]3 years ago

6 0

All of the following would be questions that could be scientifically investigated except A.
That is an opinion and cannot become a fact.

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Imagine that you are in a space station in the vacuum of outer space, far from any planet. There is no air in space, so there is

Veronika [31]

Answer:

The ball will continue to move at a constant speed forever until another force stops it.

Explanation:

Newton's first law of motion can be seen as a law of inertia. It explains that an object at rest or in a state of uniform motion will remain in that state unless it is acted upon by an external force.

Following the above, when the ball is thrown into space, the ball will continue to move with the velocity with which it was thrown until it comes in contact with another object that stops it. If this does not happen, it will continue to drift forever at that velocity.

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3 years ago

A light year is a measurement of

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Answer:

a distance of six trillion miles

Explanation:

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3 years ago

Read 2 more answers

Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. You stand halfway between them

zhuklara [117]

Answer:

a) f = 809.5 Hz , b) f = 1619 Hz

Explanation:

The condition for destructive interference from the speakers is

Δr / lam = Ф / 2π

λ = Δr 2π / π

We substitute

λ = 0.21 2 π/π

Lam = 0.42 m

Now let's use the ratio of the speed of sound and the wavelength and the frequency

v = λ f

f = v /λ

f = 340 / 0.42

f = 809.5 Hz

b) in this case the intensity is maximum

Lam = Δr 2π / 2π

Lam = 0.21 m

fF= v / lam

f = 340 / 0.21

f = 1619 Hz

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3 years ago

5. If R,= 5 ohms and R2 = 5 ohms, answer the following questions. How does the current through R, compare to the current through

Fiesta28 [93]

Answer:

ohms is power power is electricity

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3 years ago

What happens to the acceleration if you triple the force that you apply to the painting with your hand? (Use the values from the

8_murik_8 [283]

Answer:

2) when acceleration triples force triples, 3) a diagram with dynamic friction force in the opposite direction of movement of the car

4) a = 2.44 ft / s², 5) fr = 894.3 N

Explanation:

In this exercise you are asked to answer some short questions

2) Newton's second law is

F = m a

when acceleration triples force triples

3) Unfortunately, the diagrams are not shown, but the correct one is one where the axis of movement has a friction force in the opposite direction of movement, as well as indicating that the car slips, the friction coefficient of dynamic.

The correct answer is: a diagram with dynamic friction force in the opposite direction of movement of the car

4) let's use the scientific expressions

v = v₀ - a t

as the car stops v = 0

a = v₀ / t

let's reduce the magnitudes

v₀ = 40 mile / h ( $\frac{5280 ft}{1 mile}$ ) ( $\frac{1 h}{3600 s}$ ) = 58.667 ft / s

a = 58.667 / 24

a = 2.44 ft / s²

5) let's use Newton's second law

fr = m a

We must be careful not to mix the units, we will reduce the acceleration to the system Yes

a = 2.44 ft / s² (1 m / 3.28 ft) = 0.745 m / s²

fr = 1200 0.745

fr = 894.3 N

5 0

3 years ago