Multiply.<br> (2x + 4)(x

Hey there,

So first we need to know how much molecules are there in 4 grams of hydrogen right?
In one gram of hydrogen there are 6.0221415 multiplied by 10^25 molecules right?(this number is known as avagadors constant )

And to make one molecule of water u need two molecules of hydrogen and one of oxygen.
And oxygen is unlimited right?

So when we have 6.0221415 grams of hydrogen tow if these are required to make one water.
So divide that by two and you get 3.0110704 multiplied by 10^25.
So the answer is you can make the above number of water molecules.

Hope this helps!!!

5 0

2 years ago

Which objects will likely have the greatest gravitational force between them?

Mariulka [41]

Answer:

d. Two soccer balls that are touching each other

Explanation:

Let $m_1$ be the mass of a tennis ball, $m_2$ is the mass of a soccer ball.

As the mass of a soccer ball is more than the mass of a tennis ball, so

$m_2 > m_1$

Let $d_1$ be the distance between the centers of both the balls near each other and $d_2$ be the distance between the centers of both the balls touching each other.

So, $d_2 > d_1$

The gravitational force, F, between the two objects having masses M and m and separated by distance d is

$F=\frac{GMm}{d^2}$

Where G is the universal gravitational constant.

As, the gravitational force is directly proportional to the product of both the masses and inversely proportional to the square of the distance between them, so selecting the larger mass ( $m_2$ , soccer ball) separated by a lesser distance ( $d_2$ , touching) to get more gravitational force.

Therefore, there will be a larger gravitational force between them when two soccer balls touching each other.

Hence, option (d) is correct.

3 0

3 years ago

A 1.0 kg object is attached to a 0.50 m string. It is twirled in a horizontal circle above the ground at a speed of 5.0 m/s.

7nadin3 [17]

Given that,

Mass of the object, m = 1 kg

It moves in a circle of radius 0.5 m with a speed of 5 m/s

To find,

The direction of the acceleration.

Solution,

Whenever an object moves in a circular path, the only force that acts on its is centripetal force which is given by the formula as follows :

$F=\dfrac{mv^2}{r}$

The centripetal acceleration acts in the direction of force. It acts along the radius of the circular path. In this figure, the direction of the acceleration is shown at point d.

4 0

2 years ago

Multiply. (2x + 4)(x - 4)