Copper sulphate ; CuSO4.5H2O (NB The 5H2O is the water of hydration held in the crystal ; like you hold a tennis ball in your hand). Ammonium sulphide. ; (NH4)2S
It depends on your reference point. You are moving when you move farther away from one reference point and closer to another. So an example of this could be that the floor is one reference point, and the ceiling is another. If you jump up, you would move closer to the ceiling and farther away from the floor. If you and a friend are your reference points, and you throw a ball to your friend, the ball moved bacause it went farther from you, and closer to your friend! That is how you know an object is moving! Now, technically we are always moving... the earth is moving! So if you are thinking about it like that, then maybe the sun is one reference point, and Mars could be the other! Who knows! But it just all depends on your reference point!
a earth is a ball of dust a earth is a ball of dust
The phases of the Moon occur because the Sun provides light from over THERE, while we are HERE looking at the Moon. As the Moon orbits the Earth, the light from the Sun is reflected away, and some of it hits the Earth. But half of the Moon is dark, with no sunlight, and we can only see the parts that are illuminated.You can see this at home. Place a BRIGHT light at one end of a room and point it at you, at the other end. Hold a basketball at arms' length, and turn around slowly holding the ball in front of you. You will see that when your back is to the light and the ball is in front of you, the ball is completely lit up. As you turn 90 degrees, the ball is only half illuminated, and as you turn to face the light, the ball becomes dark - because the illuminated side of the ball is away from you.And if the ball blocks out the light, this is like a solar eclipse.
it will blow up
The freezing temp' IS the temp' of MyPenis when I have just had sex!
You lose the point and your opponent wins the point.
True. Freezing would compress the gas in the ball and reduce the elasticity of the rubber in it.
If you hit the ball into the net in tennis you don't lose a point, rather the opponent get s a point.
It's your point.
The point of tennis is to keep the ball within bounds on the opposite side of the net from yourself, and to be the last person to do so.
If the tennis ball hit the player, even if the player is out of bounds, then the opponent gets the point.
The person who never hit the ball would get the point.
In that case, the point is rewarded to the person that hit the ball.