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4 years ago

A theory that stands the test of time and becomes the basis for a field of

Physics

2 answers:

Morgarella [4.7K]4 years ago

8 0

Answer:

Paradigm

Explanation:

A theory is a set of statements that purport to say something about the way the world works. A theory that stands the test of time and becomes the basis for a field of study is known as paradigm. It provides the background or the frame that allows a theory to be tested and measured.

mestny [16]4 years ago

5 0

Answer:

A working theory

Explanation:

It's name defines it for itself, and also the other three options are not appropriate: conclusion is the result of a logical process, hypothesis is the premises one wants to test in an experiment, and paradigm is more ample than just a working theory, since it encompasses the set of all methods, standards, concepts and thoughts associated with a particular field of research.

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The acceleration used for the height is 9.81 m/s2 because it is the acceleration due to gravity. (true or false)

Yuliya22 [10]

Answer:

true

Explanation:

Gravity (or the acceleration due to gravity) is 9.81 meters per second squared, on the surface of Earth, because of the size of Earth and the distance we are on its surface from its center.

4 0

3 years ago

Find the magnitude of the resultant force and the angle it makes with the positive x-axis. (Let |a| = 22 lb and |b| = 16 lb. Rou

SVEN [57.7K]

Incomplete question as the angle between the force is not given I assumed angle of 55°.The complete question is here

Two forces, a vertical force of 22 lb and another of 16 lb, act on the same object. The angle between these forces is 55°. Find the magnitude and direction angle from the positive x-axis of the resultant force that acts on the object. (Round to one decimal places.)

Answer:

Resultant Force=33.8 lb

Angle=67.2°

Explanation:

Given data

Fa=22 lb

Fb=16 lb

Θ=55⁰

To find

(i) Resultant Force F

(ii)Angle α

Solution

First we need to represent the forces in vector form

$\sqrt{x} F_{1}=22j\\ F_{2}=u+v\\F_{2}=16sin(55)i+16cos(55)j\\F_{2}=16(0.82)i+16(0.5735)j\\F_{2}=13.12i+9.176j$

Total Force

$F=F_{1}+F_{2}\\ F_{2}=22j+13.12i+9.176j\\F_{2}=13.12i+31.176j$

The Resultant Force is given as

$|F|=\sqrt{x^{2} +y^{2} }\\|F|=\sqrt{(13.12)^{2} +(31.176)^{2} }\\ |F|=33.8lb$

For(ii) angle

We can find the angle bu using tanα=y/x

$tan\alpha =\frac{31.176}{13.12}\\ \alpha =tan^{-1} (\frac{31.176}{13.12})\\\alpha =67.2^{o}$

7 0

4 years ago

A light wave has a 670 nm wavelength in air. Its wavelength in a transparent solid is 420 nm.? What is the speed of light in thi

attashe74 [19]

The frequency of a beam of light does not change as it passes from a medium to another, only its wavelength and speed are affected. The experimental speed of light in air is:
3 * 10^8 m/s
Therefore, the frequency of this beam of light is:
v = fλ; where v is speed, f is frequency, and λ is the wavelength. The frequency thus is:
3×10⁸ / (670 × 10⁻⁹) = 4.48 × 10¹⁴ Hz
The frequency will remain the same in the solid medium
The speed will then become:
4.48 × 10¹⁴ × 420 × 10⁻⁹ = 1.88 × 10⁸ meters per second

4 0

3 years ago

When iron combines with oxygen to form iron oxide, a chemical reaction has occurred.

REY [17]

It is true for this question

6 0

3 years ago

Read 2 more answers

A particle is moving in a circular path of radius r . The displacement after half a circle would be

Art [367]

Answer:

Explanation:

As we know that

The displacement is the total distance measured between the initial or start and final or destination point

If particle cover half path of the circle, the displacement can easily find out by considering the distance between the start and destination point

We attached the diagram for better understanding

As per the diagram.

The displacement after half-circle is

AB = OA + OB

= r + r

= 2r

3 0

4 years ago