We accept too many things for granted. There are so many wondrous events that occur every day that we rarely think about. Have you ever been on a camping trip and realized that you forgot the drinking cups? Have you almost missed a phone call because your cell phone was in the next room and you couldn’t hear it ringing but your 19-year-old daughter could?
Here are some interesting questions.
Why Does a Raw Egg Sink in Tap Water But Float in Salt Water?
The raw egg is more dense (think of it as heavier) than the tap water, which prevents it from floating.
The raw egg is less dense (think of it as lighter) than salt water, which allows it to float.
It is easier for us to float in a swimming pool that is filled with salt water than it is for us to float in a fresh water pool.
Why Can Your Children Hear the Cell Phone Ring But You Cannot?
Older individuals, usually over 40, cannot hear high pitched sounds easily. The reason is that hair cells in our ears become.
As we get older (over 40), our hearing worsens. The hair cells in our ears become damaged as we age and the high pitch of the ring tone can no longer be detected.
Why Can We Yank a Tablecloth Off the Table Without Moving the Four Settings?
Inertia, which means that an object at rest tends to remain at rest and an object in motion tends to stay in motion, results in the dishes remaining in place.
It is important to pull the tablecloth off the table rapidly to prevent friction between the dishes and tablecloth from keeping the dishes on the tablecloth.
Why Does an Ice Cube Float In Water If Both are H2O?
When liquid water cools, the molecules move closer. This decreases the water’s volume and increases it’s density. At 3.98 degrees Celsius, the molecules are as close as they will ever be.
As the water cools, the space between the molecules increases. The density of the water decreases. At zero degrees Celsius, the water freezes.The frozen water or ice is less dense or “lighter” than the liquid water, which allows the ice to float.
This is the reason that fish survive under the ice in a frozen pond.
Why is a burn from steam more dangerous than a burn from boiling water?
Heat energy is needed to convert water to steam. The steam contains more energy than water despite the fact that both are at the same temperature. The extra energy makes a burn from steam more dangerous.
What is the Difference Between Melting and Dissolving?
When something melts, it changes its phase or state from solid to liquid. Solid ice melts to become water.
Sugar dissolves in water. Both are composed of molecules. When sugar is placed in water, energy from the water molecules are transferred to the sugar. The energized sugar molecules break away from each other, dissolving the sugar.
Where do the Small Bubbles That Appear on the Sides of a Glass of Cold Water Come From as the Water Remains on the Table?
More air can dissolve in cold water than in hot water. Usually, substances dissolve more easily in liquids that are hot rather than cold, but not with respect to water.
As the temperature of a glass of cold water increases, air molecules that were dissolved when the water was cold come out of solution and adhere to the sides of the glass.
What is the Difference Between Heat and Temperature ?
Heat is the total amount of energy of the molecules in a system. A glass of water at room temperature contains a specific number of molecules. Heat is the sum of energy possessed by the water molecules.
Some molecules may have a lot of energy while some may have much less. Temperature is the average amount of energy of the molecules.
How Can We Freeze to Death at a Temperature of 1,000 Degrees C.?
This is related to the difference between heat and temperature. At the upper part of the atmosphere, the temperature reaches 1,000 degrees C. The problem is that there aren’t many molecules present, which means that there isn’t much heat.
The few molecules around are moving rapidly, but don’t have much total energy. Since there is not much heat, a person would feel extremely cold.
How Could We Boil Water in a Piece of Paper?
Paper ignites at 451 degrees Fahrenheit. If we fold a piece of paper into the shape of a cup and add water, the paper will not ignite.
The water absorbs the heat, which prevents the paper from reaching 451 degrees Fahrenheit.