A platinum wire is used to determine the melting point of in…
A platinum wire is used to determine the melting point of indium. The resistance of the platinum wire is 2 Ω at 20°C and increases to 3.072 Ω as indium starts to melt. What is the melting point of indium? (The temperature coefficient of resistivity for platinum is 3.9 × 10-3 (°C)-1)
Read DetailsA charged particle of mass 2 g is subjected to a 6 T magneti…
A charged particle of mass 2 g is subjected to a 6 T magnetic field which acts at a right angle to its motion. If the particle moves in a circle of radius 20 cm at a speed of 5 m/s, what is the magnitude of the charge on the particle?
Read DetailsThe drawing shows four situations in which a positively char…
The drawing shows four situations in which a positively charged particle is moving with a velocity v→{“version”:”1.1″,”math”:”v→”} through a magnetic field B→{“version”:”1.1″,”math”:”B→”}. In each case, the magnetic field is directed out of the page toward you, and the velocity is directed to the right. In only one of these drawings is the magnetic force F→{“version”:”1.1″,”math”:”F→”} physically reasonable. Which drawing is it?
Read DetailsFor each set of organisms in A – C below, describe at least…
For each set of organisms in A – C below, describe at least two cellular features that are different between the groups of organisms. You may only list a cellular feature once in any of your answers. A. Bacteria and Archaea B. Archaea and Eukaryotes C. Bacteria and Eukaryotes
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