All categories

3 years ago

Why are scientific theories modified, but seldom discarded?

Physics

2 answers:

scoundrel [369]3 years ago

5 0

Because some scientific theories are true and some are false

atroni [7]3 years ago

5 0

Answer:

A scientific theory is a well-explained idea which is established after performing the experiments which provide the evidence in support of the hypothesis.

The theory can be modified as well as can be rejected with time as the advancement in the technology can provide new facts which could be added in the existed theory or contradictory facts which could lead to the rejection of the theory.

The generation of new data can shift the paradigm of science on the basis of which the scientific theory is based.

You might be interested in

Compare the two circuit diagrams If one of the resistors is turned off (a light bulb goes out), what happens to the other resist

ella [17]

Answer:

it’s C

Explanation:

i just took the test

8 0

3 years ago

If a rigid body rotates about point O, the sum of the moments of the external forces acting on the body about point O equals whi

Drupady [299]

Answer:

The answer to the question is A.

Explanation:

The definition of moment is Force multiplied the distance to the point of interest.

So the external moment at point O is equal to ⇒ EMо= F×d

Knowing the definition of moment of inercia (I) and a newtonian Force ( m.a)

We can say that te moment of the externals force at point O is EMо= IGa

Because the rotation of a body in a inmovil point is implicated by the moment of inercia an the action of the gravity in that moment.

6 0

4 years ago

I NEED SOMEONES HELP which statements are true regarding scientific evidence supporting the big bang theory

Elena-2011 [213]

The answer is A,B,C that apply. I believe this is the answer i hope this helps have a good day.

7 0

3 years ago

Read 2 more answers

A 2.5m long steel piano wire has a diameter of 0.5cm how great is the tention in the wire if it stretches by 0.45cm when tighten

UkoKoshka [18]

Answer: Their u go i found it their was about 3 pages i did not no what pages u had to do.

Explanation:

Download pdf

7 0

3 years ago

The 1000-lb elevator is hoisted by the pulley system and motor M. If the motor exerts a constant force of 500 lb on the cable, d

Nezavi [6.7K]

Answer:

the power that must be supplied to the motor is 101.45 hp

Explanation:

Given that,

The weight of elevator = 1000lb

The motor exerts a constant force of 500 lb on the cable

The load has been hoisted s = 15 ft starting from rest

The motor has an efficiency of e = 0.65

According to the equation of motion:

F = ma

$3(500) - 1000 = \frac{1000}{32.2} * aa = 16.1 ft/s^2$

$v^2 - u^2 = 2a (S - So)\\\\v^2 - (0)^2 = 2 * 16.1 (15-0)\\\\v = 21.98m/s$

To calculate the output power:

P(out) = F. v

P(out) = 3 (500) * 21.98

P(out) = 32970 lb.ft/s

As efficiency is given and output power is known, we can calculate the input power.

ε = P(out) / P(in)

0.65 = 32970 / P(in )

P(in) = 50,723 lb.ft/s

P(in) = 50,723 / 500 hp

= 101.45 hp

the power that must be supplied to the motor is 101.45 hp

5 0

4 years ago