Which of the following is the smallest volume? 500 mL 2,500 cm3 5.5 x 10-1 L 25 m3

When talking on a phone, the voice is transformed into electrical energy. This energy passes over wires or is transmitted throug

Art [367]

It transferred from electrical to sound.

5 0

3 years ago

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What type of reaction does this equation represent? 2I4O9(s) → 4I2(s) + 9O2(g)

Tju [1.3M]

Answer:

2I4O9_4I +9O

Explanation:

Complex compound (

I

4

O

9

) is broken down to form

I

2

and

O

2

4 0

3 years ago

The radius of a circle is 7.31. How should the circle area be reported?

Alona [7]

I'm not sure but it should be 7.31 times 2 times 3.14 or pi

7.31 x 2 x 3.14 = 45.9068

If you need to round to the nearest tenth it will be 45.9

If you need to round to the nearest hundredth it will be 45.91

7 0

3 years ago

A buildup of charges in an object is called

8_murik_8 [283]

Answer:

Static Electricity.

Explanation:

Static electricity is defined as 'an electric charge that has built up on an insulated body, often due to friction.' It is an outcome of the disparity among the positive, as well as, negative charges residing in a body or object and causes the charge to build up on the surface of the body. The accumulation of electric charges on the objects like wool, hair, silk, plastic, etc. causes them to possess static electricity. These charges stay on the surface until it is discharged or released through a source. Thus, 'static electricity' is the correct answer.

5 0

2 years ago

What is the specific heat capacity of an unknown metal if 75.00 g of the metal absorbs 418.6J of heat and the temperature rises

EleoNora [17]

Answer:

The specific heat capacity of the unknown metal is 0.223 $\frac{J}{g*C}$

Explanation:

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

There is a direct proportional relationship between heat and temperature. The constant of proportionality depends on the substance that constitutes the body as on its mass, and is the product of the specific heat by the mass of the body. So, the equation that allows calculating heat exchanges is:

Q = c * m * ΔT

where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.

In this case, you know:

Q= 418.6 J
c= ?
m= 75 g
ΔT= 25 C

Replacing:

418.6 J= c* 75 g* 25 C

Solving:

$c=\frac{418.6 J}{75 g*25 C}$

c= 0.223 $\frac{J}{g*C}$

The specific heat capacity of the unknown metal is 0.223 $\frac{J}{g*C}$

3 0

2 years ago