Category: Physics

What are 2 ways heat is measured? Temperature is a measure of the average translational kinetic energy of the molecules of a system. Heat is commonly expressed in either of two units: the calorie, an older metric unit, and the British thermal unit (Btu), an English unit commonly used in the United States. What are […]

How do you increase cooling rate? Thin skins, such as that of carrots, and large surface area, such as leafy greens, also increase thermal conductivity. Mushrooms lack a skin and are more than 90% water, so their thermal conductivity is highest of all fresh products. Thermal conductivity of different vegetables, ranked from low to high. […]

Why can you see the moon and sun at same time? The time it takes the Moon to rotate on its axis is the same time it takes to complete one trip (or “orbit”) around the Earth. This is why we always see the same side of the Moon. It also follows a similar path […]

Why does summer start on the solstice? The summer solstice, also known as estival solstice or midsummer, occurs when one of the Earth’s poles has its maximum tilt toward the Sun. It happens twice yearly, once in each hemisphere (Northern and Southern). On the summer solstice, Earth’s maximum axial tilt toward the Sun is 23.44°. […]

Is 2 cans of tuna a day bad? Though tuna is very nutritious, it’s also high in mercury compared to most other fish. Therefore, it should be eaten in moderation — not every day. You can eat skipjack and light canned tuna alongside other low-mercury fish a few times each week, but should limit or […]

What is the main function of alveoli? The alveoli are where the lungs and the blood exchange oxygen and carbon dioxide during the process of breathing in and breathing out. Oxygen breathed in from the air passes through the alveoli and into the blood and travels to the tissues throughout the body. What destroys the […]

Why is negative free energy spontaneous? Spontaneous reactions release free energy, which can be used to do work. A mathematical combination of enthalpy change and entropy change allows the change in free energy to be calculated. A reaction with a negative value for ΔG releases free energy and is thus spontaneous. What causes entropy to […]

What is the best type of graph? Line graphs are used to track changes over short and long periods of time. When smaller changes exist, line graphs are better to use than bar graphs. Line graphs can also be used to compare changes over the same period of time for more than one group. What […]

What type of cells work together to make tissue? Organization of Your Body: Cells, Tissues, Organs. Cells are grouped together to carry out specific functions. A group of cells that work together form a tissue. Your body has four main types of tissues, as do the bodies of other animals. Which is a group of […]

What are the two main factors that influence ocean currents? Winds, water density, and tides all drive ocean currents. Coastal and sea floor features influence their location, direction, and speed. Earth’s rotation results in the Coriolis effect which also influences ocean currents. Are oceans getting saltier? Rain replenishes freshwater in rivers and streams, so they […]