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3 years ago

What does the term theory mean in science

Physics

2 answers:

Tresset [83]3 years ago

6 0

Answer:

It is like a hypothesis. It is an idea of something.

Explanation:

A theory is a set of accepted beliefs or organized principles that explain and guide analysis and one of the ways that theory is defined is that it is different from practice, when certain principles are tested. ... This word is a noun and comes from the Greek theoria, which means "contemplation or speculation."

Lena [83]3 years ago

3 0

I believe it is Not yet proven

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A rocket has a mass 250 x (10^3) slugs on earth. Specify(a) its mass in SI units, and(b)its weight in SI units.If the rocket is

zloy xaker [14]

Explanation:

It is given that,

Mass of the rocket, $m=250\times 10^3\ slugs$

(a) The SI unit of mass is kilogram (kg). The relation between slugs and the kg is given by :

1 slug = 14.59 kg

So, $250\times 10^3\ slugs=250\times 10^3\times 14.59$

Mass of the rocket, m = 3647500 kg

(b) Weight of the rocket is given by :

W = m g

$W=3647500\times 9.8=35745500\ N$

$W=3.5\times 10^7\ N$

Mass is the amount of matter contained inside the object. So, the mass of the rocket remains the same i.e. 3647500 kg

Weight of the rocket on the moon is, $W=mg$

$W=3647500\times 1.61$

W = 5872475 N

$W=5.8\times 10^6\ N$

Hence, this is the required solution.

8 0

3 years ago

Describe how wet and dry barometers work

siniylev [52]

Answer: Wet barometer - The tool works by measuring atmospheric pressure to predict incoming weather. Since the glass is only filled halfway with water, the other half is exposed to the atmosphere. When the outdoor atmospheric pressure rises, the pressure in the glass decreases, and causes the water to move down the spout.

Dry barometer - A Torricellian barometer (sometimes called a mercury barometer) is an inverted (upside-down) glass tube standing in a bath of mercury. Air pressure pushes down on the surface of the mercury, making some rise up the tube. The greater the air pressure, the higher the mercury rises.

I hope this helps!

7 0

3 years ago

A 2.40 kgkg can of coffee moving at 1.50 m/sm/s in the +x+x-direction on a kitchen counter collides head-on with a 1.20 kgkg box

Monica [59]

Answer:

1.35 m/s in the +x direction

Explanation:

Mass of can of coffee, m = 2.4 kg

Initial velocity of can of coffee, u = 1.5 m/s

Mass of box of macaroni, M = 1.2 kg

Initial velocity of box of macaroni, U = 0 m/s

Final velocity of can of coffee, v = 0.825 m/s

We can find the final velocity of the box of macaroni, V, by using the Principle of Conservation of momentum:

Total initial momentum = Total final momentum

Momentum is given as the product of mass and velocity. Hence:

mu + MU = mv + MV

(2.4 * 1.5) + (1.2 * 0) = (2.4 * 0.825) + (1.2 * V)

3.6 + 0 = 1.98 + 1.2V

1.2V = 3.6 - 1.98 = 1.62

=> V = 1.62/1.2

V = 1.35 m/s

The final velocity of the box of macaroni is 1.35 m/s and it is in the +x direction.

3 0

3 years ago

A car accelerates from rest. It reaches a velocity of 25m/s in 10 seconds. What was the cars acceleration

soldier1979 [14.2K]

Answer:

a = 2.5 m/s^2

Explanation:

u = 0

v = 25

t = 10

(using first eq. of motion)

a = (v - u) /t

a = (25 - 0) /10

a = 25/10

a = 2.5 m/s^2

7 0

3 years ago

When sand absorbs the electromagnetic waves of the sun it becomes warm through the process of

Mrac [35]

I believe the answer is radiation

6 0

3 years ago