What evidence does the fossil record provide? Fossils document the existence of now-extinct species, showing that different organisms have lived on Earth during different periods of the planet’s history. They can also help scientists reconstruct the evolutionary histories of present-day species. Why are fossils so hard to find? Fossils are rare because their formation and […]
Is any closed conducting path?
Is any closed conducting path? There must be a closed conducting loop from the positive to the negative terminal in order to establish a circuit and to have a current. When this occurs, the circuit is opened and a closed conducting loop no longer exists. Without a closed conducting loop, there can be no circuit, […]
What are the characteristics of seedless vascular plants?
What are the characteristics of seedless vascular plants? Seedless vascular plants include ferns, horsetails and clubmosses. These types of plants have the same special tissue to move water and food through their stems and foliage, like other vascular plants, but they don’t produce flowers or seeds. Instead of seeds, seedless vascular plants reproduce with spores. […]
Why are light bulbs brighter in a parallel circuit?
Why are light bulbs brighter in a parallel circuit? When the bulbs are in parallel, each bulb sees the full voltage V so P=V2R. Since a bulb glows brighter when it gets more power the ones in parallel will glow brighter. See, the parallel combination of resistors reduces the effective resistance of the circuit. Hence […]
Why the motion of pendulum will not be a simple harmonic motion?
Why the motion of pendulum will not be a simple harmonic motion? Any pendulum undergoes simple harmonic motion when the amplitude of oscillation is small. The pendulum still oscillates, but the motion is no longer simple harmonic motion because the angular acceleration is not proportional to the negative of the angular displacement. Why is the […]
Is tea a colloid suspension or solution?
Which solid has the highest melting point?
Which solid has the highest melting point? tungsten Do impurities lower melting point? The presence of even a small amount of impurity will lower a compound’s melting point by a few degrees and broaden the melting point temperature range. Because the impurity causes defects in the crystalline lattice, it is easier to overcome the intermolecular […]
Who is the father of atom?
Who is the father of atom? Basic Atomic Structure. The idea that everything is made of atoms was pioneered by John Dalton (1766-1844) in a book he published in 1808. He is sometimes called the “father” of atomic theory, but judging from this photo on the right “grandfather” might be a better term. How thick […]
What is needed for an ecosystem to support the greatest variety of organisms?
What is needed for an ecosystem to support the greatest variety of organisms? Answer: An ecosystem must contain producers, consumers, decomposers, and dead and inorganic matter. All ecosystems require energy from an external source – this is usually the sun. Plants need sunlight to photosynthesize and produce glucose, providing an energy source for other organisms. […]
How far away is a parsec in light years?
How far away is a parsec in light years? 3.26 light years What can Parallax be used to calculate quizlet? Parallax measurements work by measuring the relative change in position of stars as the earth goes around the sun. Apparent Magnitude is the star’s brightness as it appears from earth. absolute magnitude is the apparent […]