PHYSICS MIDDLE SCHOOL

Why do ice cubes always float at the top of a glass of water?

Answers

Answer 1
Answer:
Because water is a very very very very very unusual substance ... It's
the only known substance whose solid form is less dense than its liquid
form near the same temperature.

In other words, water is the only known substance for which a solid lump
of it floats in a liquid glass of it.

If that were not true ... if the behavior of the density of water around its
freezing temperature were the same as the density of all other known
substances ... then life on Earth would be impossible.

Think about that for a while !  Ya gotta admire whoever it was that designed water !
Answer 2
Answer:

because ice is less dense than liquid water

Related Questions

Which statement best describes beaches?A.) Beaches are always changing due to factors such as waves adding and eroding sand. B.) Beaches change little over time as waves follow the same patterns year after year. C.) Beaches change little over time as wind patterns stay the same. D.) Beaches change little over time as waves move further up the shore.
A train moving with a velocity of 87.1 km/hour North, increases its speed with a uniform acceleration of 0.250 m/s2 North until it reaches a velocity of 160.0 km/hour North. What distance did the train travel while it was increasing its velocity, in units of meters?
Where is the solid material left behind in the distillation process
Calculate the volume of 1280 kilograms of aluminium if the density of aluminium is 2700 kg/m³. Give your answer to 2 decimal places.
Unlike metals, many nonmetals are.......a. good conductors of heat and electricity. b. malleable and ductile. c. gases at room temperature. d. shiny.

Coriolis effect, global winds and continental deflections are all factors that controla. deep currents
c. surface currents
b. wind currents
d. density of currents

Answers

C.surface currents are the answer
Well, at first glance I'd be tempted to say all of them. The C "force" is why weather maps show winds blowing parallel to isobars and thus around centres of high and low pressure. (You'd expect, or at least I would, that air would flow from high to low pressures, not round them ... )

Most surface wind systems are named...?

Answers

It's called trade winds.
I believe the answer is trade winds give me brainliest plz

What do you think that astronomers mean when they use the term observable universe? (Hint: Thi.nk of the time it takes for light from very distant objects to reach Earth.)

Answers

When people use the term "observable universe" it means that the light from other parts of the universe hasn't yet had time to reach us, so we cannot see it.

What is body composition?How much you weigh
How much of your body is made of fat and muscle
How much hair you have

Answers

Answer:

How much of your body is made of fat and muscle.

Explanation:

In physical fitness, body composition is used to describe the percentages of fat, bone, water and muscle in human bodies. Because muscular tissue takes up less space in the body than fat tissue, body composition, as well as weight, determines leanness.
how much of ur body is made of fat and muscle

Oceans receive freshwater from precipitation and rivers. Yet ocean levels do not change very much from these actions. Why are ocean levels not greatly affected?

Answers

Ocean levels are not greatly affected because when water is deposited or received from the ocean, at the same time water is being evaporated from the ocean to condense in the clouds and them form into precipitation.

Two reasons:

1).  Because oceans are big and deep, and have a lot of water in them,
while by comparison, rivers are narrow, shallow, and carry less water.
It's like using a hundred droppers to pour water into an olympic-size pool.
The level of the water in the pool doesn't change much.

2).  Because the sun shines on oceans, and tons of water evaporates
from them.  That's where the water comes from to make rain and snow,
and to keep the rivers full, so that they can keep flowing into oceans.
It's a cycle.  The same water flows into the oceans from the rivers,
then evaporates from the oceans, fills the rivers, and flows into the
oceans again . . . millions of times.

What type of sex chromosome will be contained by the sex cells of a female giraffe? A.
X chromosome only

B.
Y chromosome only

C.
X and Y chromosomes

D.
egg cells do not contain sex chromosomes
A pea plant is heterozygous for height (Tt). Which allele will be carried by a pollen grain produced by the plant?

A.
T only

B.
t only

C.
T and t

D.
T or t
Which term describes the example below?

A white cat has a mother that is homozygous dominant and a father that is homozygous recessive.


A.
homozygous dominant

B.
homozygous recessive

C.
heterozygous

D.
female

E.
male
Which term describes the example below?

A rabbit’s cells have two sex chromosomes that are different.


A.
homozygous dominant

B.
homozygous recessive

C.
heterozygous

D.
female

E.
male
Which term describes the example below?

A child with no freckles has a mother who has freckles and is heterozygous and a father who has no freckles and is homozygous recessive.


A.
homozygous dominant

B.
homozygous recessive

C.
heterozygous

D.
female

E.
male
Which term describes the example below?

A child with a widow’s peak has a mother who is homozygous dominant for a widow’s peak and a father who is homozygous dominant for a widow’s peak.

A.
homozygous dominant

B.
homozygous recessive

C.
heterozygous

D.
female

E.
male
Which term describes the example below?

A puppy’s cells have two sex chromosomes that are the same.

A.
homozygous dominant

B.
homozygous recessive

C.
heterozygous

D.
female

E.
male

Answers

1. X chromosome only

2. T or t

3. heterozygous

4. male

5. homozygous recessive

6. homozygous dominant

7. female
Other Questions
Please help me and you will get a lot of points. Analysis and conclusion must be at least to 2 to 3 paragraphs
Which of the following phases changes at point B on the diagram shown below? A)deposition B)freezing C)melting D)boiling
You leave a light on in your house for 10 minutes (600 seconds). The lightbulb draws 0.5 amps at 120 volts. What is the power rating of the lightbulb and how much energy is consumed in the 10 minutes?
Where are memories stored in the brain?