Ask question

Ask question

All categories

2 years ago

8

When a electric current is passed threw water during electrolysis, 2 gases are formed. 1 gas has a boiling point of -183°C and t

he other has a boiling point of -253°C. Has a physical or a chemical change occurred? Explain please.

1 answer:

Keith_Richards [23]2 years ago

8 0

Answer:

Sorrry so very hard

Ok hahaha

You might be interested in

Nuclear Energy definition

Svetlanka [38]

Answer:

The energy released during nucleur fissionor fusion , espicially when used to generate

Explanation:

Distionary.

8 0

2 years ago

How long will it take to go 150 km [E] traveling at 50 km/hr?

pantera1 [17]

It will take 3 hours

7 0

3 years ago

Read 2 more answers

A carpenter is driving a 15.0-g steel nail into a board. His 1.00-kg hammer is moving at 8.50 m/s when it strikes the nail. Half

bekas [8.4K]

Answer: The increase in temperature of the nail after the three blows is 8.0636 Kelvins. The correct option is (d).

Explanation:

Kinetic energy of the hammer ,K.E.=

$\frac{1}{2}mv^2=\frac{1}{2}1.00 kg\times (8.50 m/s)^2=36.125 J$

Half of the kinetic energy of the hammer is transformed into heat in the nail.

Energy transferred to the nail in one blow =

$\frac{1}{2}K.E.=\frac{1}{2}\times 36.125 J=18.0625 J$

Total energy transferred after 3 blows,Q = $3\times 18.0625 J=54.1875 J$

Mass of the nail = 15 g = 0.015 kg

Change in temperature = $\Delta T$

Specif heat of the steel = c = 448 J/kg K

$Q=mc\Delta T$

$54.1875 J=0.015 kg\times 448 J/kg K\times \Delta T$

$\Delta T=8.0636 K\approx 8.1 K$

The increase in temperature of the nail after the three blows is 8.1 Kelvins.Hence, correct option is (d).

4 0

2 years ago

True or false? Magnetic reversals are recorded in the newly formed oceanic crust on BOTH sides of a mid-ocean ridge spreading ce

andrey2020 [161]

answer: false is my answer for thi question

4 0

2 years ago

How long does it take a car to cross a 20m bridge if it starts from rest and accelerates at 5 m/s^2?

polet [3.4K]

The correct answer is 2.8s

5 0

3 years ago