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3 years ago

What is the name of the system that standardizes measurements in science

Physics

2 answers:

ANTONII [103]3 years ago

8 0

Explanation:

the international system of unit of the aside from the branch system International is a unit is is the metric system used in Sin industries and medicine

Liono4ka [1.6K]3 years ago

8 0

Answer:

Metric system

Explanation:

Also known as SI system

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With two identical light bulbs and two identical batteries how would you arrange in order to get the maximum total power to the

Norma-Jean [14]

Answer:

The batteries would be connected in series while the bulbs would be connected in parallel

Explanation:

Power (W) = VI

where V = voltage, I = current and R = resistance

from V = IR , I = V/R

Power (W) now becomes = V (V/R) = $\frac{V^{2} }{R}$

Power (W) = $\frac{V^{2} }{R}$

from the above equation, power is directly dependent on voltage, hence the voltage has to be high for the power to be high and the power is also inversely dependent on the resistance (in this case the bulbs which act as the load)

We have to batteries, when batteries are connected in series the total voltage becomes the summation of the two voltages hence giving a higher voltage and when they are connected in parallel their voltage remains the same. Since we want to get higher voltage we will connect the two batteries in series.
we have two bulbs which are the resistance here, from the equation above the power is inversely dependent on the resistance so we would need its value to be minimal. When resistance is connected in series the resistance individual will be added to get the total resistance, hence the total resistance will be high but when the resistors are arranged in parallel you get the total resistance by applying the formula $\frac{R1R2}{R1+R2}$ which will give us a lower resistance. Hence we would connect the bulbs in parallel.

Take note that the power from this connection should not exceed the bulbs power rating so as to avoid damage of the bulbs.

4 0

3 years ago

Different wavelengths of light are seen as different. A. Atoms B. Sounds C. Colors D. Speeds

attashe74 [19]

Different wavelengths of light are seen as colors

7 0

2 years ago

8. Calculate the total resistance in a series circuit with a fan (3 ohms) and 3 lights (1 ohms each). 9 ohms O 12 ohms 15 ohms 0

Paraphin [41]

Answer:

R_eq = 6 Ω

Explanation:

In a series circuit the current is constant throughout the circuit and the resistance is the sum of all the resistances in it.

R_eq = ∑

in this case we have

R_eq = R₁1 + 3 R₂

where R₁ is the resistance of the fan and R₂ the resistance of each light, we must clarify that we will assume that the resistance of the lights does not change with temperature

let's calculate

R_eq = 3 + 3 1

R_eq = 6 Ω

5 0

2 years ago

Read 2 more answers

Pls answer I will make brainlist and 20 point

Vladimir [108]

Answer:

Reflection:

The phenomenon of a propagating wave (light or sound) being thrown back from a surface

Sentence: Your reflection is what you see in the mirror. Other things that bounce back at you are also reflections — light waves, sound waves, even your thoughts.

Refraction:

Definition: The change in direction of a propagating wave (light or sound) when passing from one medium to another

Sentence: Refraction is the bending of light or sound as it passes through something like a wall (sound) or a window (light).

Diffraction:

Definition: When light passes sharp edges or goes through narrow slits the rays are deflected and produce fringes of light and dark bands

Sentence: Diffraction is the process of light bending around an obstacle or spreading out after it moves through a small space. If you study physics, you'll learn about the diffraction of light waves.

Absorption:

Definition: (chemistry) a process in which one substance permeates another; a fluid permeates or is dissolved by a liquid or solid

Sentence: Absorption describes the process of absorbing or soaking up something: Sponges are good at water absorption; dark colors are better for heat absorption.

Interference:

Definition: The act of hindering or obstructing or impeding

Sentence: Interference is something that is in your way. If the sound of your sister's band practicing keeps you from getting your homework done, that’s interference.

Standing wave:

Definition: A wave (as a sound wave in a chamber or an electromagnetic wave in a transmission line) in which the ratio of its instantaneous amplitude at one point to that at any other point does not vary with time

Sentence: A bubble, trapped and held in a fixed position by an acoustic standing wave, begins to move erratically if a threshold wave amplitude is exceeded. The longitudinal standing wave is synchronously forced and resonated while the cross-wave is not resonant and is of higher order in amplitude.

Resonance:

Definition: Having the character of a loud deep sound; the quality of being resonant

Sentence: If you have a loud, deep voice, then your voice has resonance, and if your words are powerful and meaningful, then your words have resonance, too. Something with resonance has a deep tone or a powerful lasting effect.

I hope this helps! :)

4 0

2 years ago

Read 2 more answers

Describe the action and reaction forces in propulsion devices.

aksik [14]

Answer:

Hello!

I could help you on this ^^

Explanation:

Newton’s Third Law of Motion states, “When one object exerts a force on a second object, the second one exerts a force on the first that is equal in magnitude and opposite in direction.”

-This law is sometimes called the “Law of Action and Reaction”.

-Even though the forces are equal in magnitude (strength) and opposite in direction, they do not cancel each other.

This law addresses two objects, each with only one force exerted on it.

-Each object is exerting one force on the other object.

-Each object is experiencing only one force.

The action and reaction forces are reciprocal (opposite) on an object.

Examples may include:

A swimmer swimming forward:

The swimmer pushes against the water (action force), the water pushes back on the swimmer (reaction force) and pushes her forward.

A ball is thrown against a wall:

The ball puts a force on the wall (action force), and the wall puts a force on the ball (reaction force) so the ball bounces off.

A person is diving off a raft:

The person puts a force on the raft (action force) pushing it, and the raft puts a force on the diver (reaction force) pushing them in the opposite direction.

A person pushes against a wall (action force), and the wall exerts an equal and opposite force against the person (reaction force).

(Not my words)

"The Space Shuttle engines push out hot gases (action force), and the hot gases put a force on the shuttle engines (reaction force) so the shuttle lifts (there is no sling shot doing it)"

6 0

3 years ago