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3 years ago

Which statement describes a scientific theory?

Physics

1 answer:

PSYCHO15rus [73]3 years ago

4 0

Answer:

A theory changes based on new observations and testing.

Explanation:

A scientific theory is a product of multiple trials and repeated experiments. It usually follows after carefully conducting and testing the validity of the hypothesis.

A scientific theory provides an explanation into how something behaves.

A law just states a finding will not explain it.

Most theories are tenable and can be improved upon when new observations and testing are carried out.

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Given a force of 100 N and an acceleration of 10 m/s2, what is the mass?

Drupady [299]

F=ma, so 100=m×10. Solve for m by dividing by 10. The mass is 10 kg.

5 0

3 years ago

Drake lifted a couch a height of 0.2 meters in 1.3 seconds. He did 300 j of work. how much power did drake use?

Novosadov [1.4K]

Answer:

c is correct

Explanation:

I hope this helps.

6 0

2 years ago

A solid sphere of mass 8.6 kg, made of metal whose density is 3,400 kg/, hangs by a cord. When the sphere is immersed in a liqui

creativ13 [48]

Answer:

A. $1900 kg/m^3$

Explanation:

We are given that

$m=8.6 kg$

Density, $\rho_s=3400 kg/m^3$

Tension,T=38 N

We have to find the density of liquid.

$T=mg-\rho_l Vg$

$g=9.8 m/s^2$

Volume,V= $\frac{m}{\rho_s}$

$38=8.6\times 9.8-\rho_l\times \frac{8.6}{3400}\times 9.8$

$\rho_l\times \frac{8.6}{3400}\times 9.8=8.6\times 9.8-38$

$\rho_l=\frac{(8.6\times 9.8-38)\times 3400}{8.6\times 9.8}$

$\rho_l=1867kg/m^3\approx 1900 kg/m^3$

Option A is true.

4 0

3 years ago

How could you use the physical properties of melting poin and boiling point to identify a substance?

Vanyuwa [196]

By comparing the melting and the boiling points of the test substance to that of the substances that are recorded in the literature, we can be able to obtain the identity of a substance.

<h3>What is melting point?</h3>

The melting point is the point at which the solid would change to liquid. The boiling point is the point at which a liquid would change to gas. Now we know that the melting and the boiling point of a signature of a compound and can be used to identify a pure substance.

Hence, by comparing the melting and the boiling points of the test substance to that of the substances that are recorded in the literature, we can be able to obtain the identity of a substance.

Learn more about melting point:brainly.com/question/25777663

#SPJ1

7 0

1 year ago

A child is sledding. He starts at the top of the hill with a velocity of zero, and 3 seconds later he is speeding down the hill

Flauer [41]

Magnitude of acceleration = (change of speed) / (time for the change) =

(12 m/s - 0) / (3 sec) =

12/3 = <em>4 m/s²</em>

What's a challenge question ? Have we all passed the event horizon
and been spaghettified without knowing it ?

8 0

3 years ago