True, because the volume of water displaced by a completely submerged object would be equal to the volume of that object.
Answer:
-salt raises the melting point of the ice. Mix ice with salt then put the bottle of cream in the ice-salt mixture to freeze the cream.
Explanation:
-Salt lowers the freezing point of water in a phenomena called freezing point depression.
-Mix the ice with salt to lower it's freezing point below zero.
-Now, put the bottle of cream in the mixture, the ice will freeze faster due to the lowered temperature.
I think the answer would be B
Answer:
Option D
The star is at a distance of 100 parsecs.
Explanation:
The distance can be determined by means of the distance modulus:
(1)
Where M is the absolute magnitude, m is the apparent magnitude and d is the distance in units of parsec.
Therefore, d can be isolated from equation 1

Then, Applying logarithmic properties it is gotten:
(2)
The absolute magnitude is the intrinsic brightness of a star, while the apparent magnitude is the apparent brightness that a star will appear to have as is seen from the Earth.
Since both have the same spectral type is absolute magnitude will be the same.
Finally, equation 2 can be used:
Hence, the star is at a distance of 100 parsecs.
<em>Key term:</em>
Parsec: Parallax of arc seconds
Answer:
The volume remains constant thus you can apply the simple maths
Pressure at 30 degF = 21
Pressure at 1 degF = 
Pressure at 80 degF = 