Why is it important that the substance DNA is placed in for electrophoresis be porous? Gel electrophoresis uses electricity to separate fragments of DNA based on their length. For gel electrophoresis, DNA is placed in a porous gel. The pores restrict the movement of the DNA and creates an environment in which each individual DNA […]
Is tungsten an atom or an ion?
Is tungsten an atom or an ion? Tungsten, or wolfram, is a chemical element with the symbol W and atomic number 74. Tungsten is a rare metal found naturally on Earth almost exclusively as compounds with other elements. It was identified as a new element in 1781 and first isolated as a metal in 1783. […]
Which is not a uniform circular motion?
Which is not a uniform circular motion? In non-uniform circular motion an object is moving in a circular path with a varying speed. Since the speed is changing, there is tangential acceleration in addition to normal acceleration. How do you find tangential speed? Divide the circumference by the amount of time it takes to complete […]
What is the momentum of the ball?
What is the difference between electric and magnetic forces?
What is the difference between electric and magnetic forces? Electric forces are created by and act on, both moving and stationary charges; while magnetic forces are created by and act on only moving charges. How do you find force with mass and current? Force = Current x Length x B-field the force is F = […]
Which element will have a charge when it becomes an ion?
Which element will have a charge when it becomes an ion? Neutral atoms can be turned into positively charged ions by removing one or more electrons. A neutral sodium atom, for example, contains 11 protons and 11 electrons. By removing an electron from this atom we get a positively charged Na+ ion that has a […]
Which of the following graphs represents the motion of a particle moving with constant velocity?
Which of the following graphs represents the motion of a particle moving with constant velocity? Graph in option (d) shows an object moving at a constant velocity. Which of the following graphs represents constant speed of a body? A horizontal line on a speed-time graph represents a constant speed. A sloping line on a speed-time […]
Why is the solar calendar important?
Why is the solar calendar important? A solar calendar is a calendar whose dates indicate the season or almost equivalently the apparent position of the Sun relative to the stars. Why do we have 12 months instead of 13? Julius Caesar’s astronomers explained the need for 12 months in a year and the addition of […]
What is the final result of mitosis quizlet?
What is the final result of mitosis quizlet? The end result of mitosis and cytokinesis is two genetically identical cells where only one cell existed before. What is the result of mitosis in a human cell quizlet? Mitosis results in the production of two genetically identical diploid cells. 2 identical daughter cells identical to the […]
How is groundwater removed?
How is groundwater removed? After entering an aquifer, water moves slowly toward lower lying places and eventually is discharged from the aquifer from springs, seeps into streams, or is withdrawn from the ground by wells. Groundwater in aquifers between layers of poorly permeable rock, such as clay or shale, may be confined under pressure. What […]