What does a 10-dB increase in loudness represent?

Answers

Answer 1

Answer: if you smack your hands together, that would be about 10db

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Copper has a specific heat of 0.385 j. A piece of copper absorbs 5000 J of energy and undergoes a temperature change from 100 Celsius to 200 degrees Celsius. What is the mass of the piece of copper?

Answers

The mass of the piece of copper will be 130 kg. In the International System of Units (SI), the kilogram is the unit of mass.

What is mass?

Mass is a numerical measure of inertia, which is a basic feature of all matter. It is, in effect, a body of matter's resistance to a change in speed or position caused by the application of a force.

The energy absorbed as;

$\rm \triangle E = mC \triangle t \n\n m = (\triangle E )/(mC) \n\n m = (5000 )/(0.385 (200-100)) \n\n m=130 \ kg$

Hence, the mass of the piece of copper will be 130 kg.

To learn more about the mass, refer to the link;

brainly.com/question/13073862

#SPJ2

energy= mcT
5000 = m• 0.385 • (200-100)
m = 130kg

A flashlight has a resistance of 30 Q and is connectedby a wire to a 90 V source of voltage. What is the
current in the flashlight?

Answers

Answer:

3 A

Explanation:

The relationship between voltage, current and resistance in a conductor is expressed by Ohm's law, which states that:

$V=RI$

where:

V is the potential difference across the conductor

R is the resistance of the conductor

I is the current flowing through it

In this problem, for this flashlight we have:

V = 90 V is the potential difference

$R=30 \Omega$ is the resistance of the flashlight

Solving for I, we find the current:

$I=(V)/(R)=(90)/(30)=3 A$

How does Newton's law work? Give an example of the formula in a word problem. please help

Answers

1 An object in motion stays in motion. "Rolling a ball down an inclined plane."
2 An object's acceleration is related to it's mass. F=ma "A heavy ball rolls down the plane faster then the lighter ball"
3 For every action there is an equal and opposite reaction. "Throwing a ball, the harder you throw the faster it will go."

Natural forces that can alter ecosystems include seasons and climate changes.

T or F

Answers

I’m not completely sure but I thought no that’s true. Sorry if I’m wrong.

Explain how drinking through a straw illustrates fluid flowing from high-pressure to low-pressure areas.

Answers

the pressure in the straw is reduced, but the atmospeheric pressure on the surface of the liquid stays the same.

The outside pressure forces the liquid up the straw and into your mouth. So, just by drinking through a straw, you can observe an important property of fluids. Fluids flow from areas of high pressure to areas of low pressure.

Which trasformaron of energy takes place when a slingshot launches a stone ?

Answers

transformation of energy that takes place when a slingshot launches a stone is elastic potential energy tokinetic energy.

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(please show work)A rock is dropped off of a cliff. It falls to the ground in 10 seconds. Answer the following questions assuming that there is no air resistance.c. What is the instantaneous velocity of the rock just before it hit the ground?d.Find the rock's displacement for the 10 seconds.

If nothing is faster than light, how did the dark get there first?

An object's weight is dependent upon its location in the universe. Why is this true?A. This is true because gravitational force is the magnitude of weight acting on an object's mass and since weight varies in different places in the universe, both gravitational force and mass also vary.B.This is true because weight is the amount of matter in an object. Because gravity is a force, and force is proportional to weight, both gravity and weight vary in different places in the universe.C. This is true because gravitational force is the magnitude of weight acting on an object and since weight varies in different places in the universe, gravitational force also varies.D. This is true because weight is the magnitude of gravitational force acting on an object, and since gravitational force varies in different places in the universe, weight also varies.

In order for a color to be seen by a human, the light must be what?