What are the 4 types of matter? The five phases of matter. There are four natural states of matter: Solids, liquids, gases and plasma. The fifth state is the man-made Bose-Einstein condensates. Are all liquids incompressible? Liquids are always considered to be incompressible fluids, as density changes caused by pressure and temperature are small. While […]
Why are cod disappearing?
Why are cod disappearing? Fishing quotas are often set too high, based on the catches of good years. When overfishing, natural fluctuations in productivity, or a combination of the two, causes the catch to drop, governments typically prop up the fishery, assuring that over-harvesting will continue into the future. Why did the cod population suddenly […]
Can you prove a null hypothesis true?
Can you prove a null hypothesis true? Introductory statistics classes teach us that we can never prove the null hypothesis; all we can do is reject or fail to reject it. However, there are times when it is necessary to try to prove the nonexistence of a difference between groups. How do you support the […]
Which organism can respire in absence of oxygen?
Which organism can respire in absence of oxygen? Yeast Which animal is skin a respiratory organ? Frog Is there an animal that has both lungs and gills? Some animals can hold their breath up to 90 minutes, while others don’t even need lungs to breathe! Lungfish have a unique respiratory system, having both gills and […]
What symbols are used in a chemical equation?
What symbols are used in a chemical equation? Using state symbols in chemical equations State symbol Meaning (s) solid (l) liquid (g) gas (aq) aqueous (dissolved in water) Why do you balance a chemical equation? An equation is balanced when the same number of each element is represented on the reactant and product sides. Equations […]
What is the difference between weight and body composition?
What is the difference between weight and body composition? Your body weight is simply your body’s total mass. Body composition is what your weight is made of—muscle, bone, water, and fat. What can you do to keep a good body composition? Summary: Nutrition and exercise are critical for improving body composition. Keeping your calories, fiber […]
What are the 5 theories of evolution?
What are the 5 theories of evolution? Darwin’s theory of evolution, also called Darwinism, can be further divided into 5 parts: “evolution as such”, common descent, gradualism, population speciation, and natural selection. What is Darwins theory? Darwinism is a theory of biological evolution developed by the English naturalist Charles Darwin (1809–1882) and others, stating that […]
How can you reduce GPS error?
How can you reduce GPS error? These errors are minimized by calculating clock corrections (at monitoring stations) and transmitting the corrections along with the GPS signal to appropriately outfitted GPS receivers. Why is my phone GPS so inaccurate? For Samsung smartphones running Android 10 OS, the location information may appear inaccurate if the GPS signal […]
What do radio waves and microwaves have in common both are at the side of the spectrum that has the lowest frequency Both are found next to visible?
What do radio waves and microwaves have in common both are at the side of the spectrum that has the lowest frequency Both are found next to visible? Answer: Both are at the side of the spectrum that has the lowest frequency. Electromagnetic wave is defined as the wave which is associated with both electrical […]
Does stopping potential depends on intensity?
Does stopping potential depends on intensity? Stopping potential does not depend on the intensity of incident light. On increasing intensity, the value of saturated current increases, whereas the stopping potential remains unchanged. Stopping potential does not depend on the intensity of incident radiation. Is intensity dependent on frequency? Now when talking about sound waves the […]