How does caesium react with oxygen

Answers

Answer 1

Answer:

Answer:Cesium is a very reactive metal and reacts almost immediately with oxygen in air. It reacts to form Cesium oxide.

4Cs + O² —> 2Cs²O

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I need facts about Pluto

Answers

It is the furthest planet away from the sun.

Is bleaching your hair a physical or chemical change and why

Answers

I think its chemical change is because leach has chemicals and other stuff on it so I think its chemical change

Bleaching your hair is a chemical change because it is undergoing a process that changes the chemical makeup of the hair. Think of this: if you had a sample of hair from before you bleached it and after you bleached it, they would look completely different from each other, unlike if you had just cut a piece of hair off.

A rock at the top of a 30 meter cliff has a mass of 25 kg. Calculate the rock’s gravitational potential energy when dropped off the cliff. Assuming that energy is conserved and there is no air friction and gravity is 9.8 m/sec., at the bottom of the cliff the rock’s potential energy is completely converted to kinetic energy. Use the formula for kinetic energy to calculate the rock’s speed at the bottom of the cliff. Show all calculations.

Answers

Lets see:-

We have our formula for potential energy, which we are trying to solve for,

PE = mgh or potential energy = mass * gravity * height

So we know that PE all depends on these.

Height : 30 meters
Mass : 25 kg
Gravity (which is always constant) : 9.8 m/s/s

Now add into formula.

PE = 25*30*9.8
PE = 7350 Joules

Answer: PE = 7350 Joules

Now calculate speed:-

7,350 joules/12.5 kg = speed-squared
588 m²/s² = speed-squared
about 24.248 m/s

Mrs. Jacobson is pushing a fridge to the right with a force of 100 N. The force pushing itto the left is 15 N. What is the net (leftover) force on the fridge?
85 N to the right
85 N to the left
115 N to the right
115 N to the left

Answers

Answer:

Explanation:

Let's illustrate this; see the attachment.

We see that Mrs. Jacobson is pushing to the right with a force of 100 N and there is another opposite force pushing with a force of 15 N. Since these are in opposite directions, we can say that the force opposite to Mrs. Jacobson is pushing the fridge -15 N to the right (instead of 15 N to the left).

The net force would then be:

100 N + (-15 N) = 85 N to the right

The answer is A.

Answer:

85 N to the right

Explanation:

Convention: rightwards positive

Force applied by Mrs. Jacobson:

+100

Force applied by the fridge:

-15

Net force

+100 - 15

+85

What determines the life cycle of a star

Answers

Hi There!

What determines the life cycle of a star?

A star's life cycle is determined by its mass! :)

A star's life cycle is determined by its mass. The larger its mass, the shorter its life cycle. A star's mass is determined by the amount of matter that is available in its nebula, the giant cloud of gas and dust from which it was born

What dose it mean to say that mass is conserved during a physical change?

Answers

It means that the amount of mass will stay the same after the change occurs.

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Name the 5 types of chemical reactions