answer:A voltmeter is used to measure voltage, and it should have a very high resistance to minimize the current drawn from the circuit being measured. This ensures that the voltmeter does not affect the circuit's operation. An ammeter is used to measure current, and it should have a very low resistance to allow the maximum current to flow through it. This minimizes the voltage drop across the ammeter and ensures accurate current measurement. A shunt is a low-resistance resistor connected in parallel with an ammeter to extend its current range. It has a very low resistance to allow most of the current to flow through it, bypassing the ammeter. An electronic voltmeter uses electronic components to measure voltage and typically draws negligible current from the circuit being measured. This is in contrast to traditional analog voltmeters, which draw some current due to the movement of the needle. An electronic voltmeter draws appreciable current. The answer is D.

answer:Using the same approach as in the original answer, we can calculate the hydroxide ion concentration: {eq}qquad qquad 3.31 times 10^{-6} = frac{x^2}{0.050 - x} qquad qquad x = 4.07 times 10^{-4} M qquad qquad [OH^-]_{eq} = 4.07 times 10^{-4} M {/eq} Then, we can calculate the pOH: {eq}qquad qquad pOH = -log [OH^-] = -log (4.07 times 10^{-4} M) qquad qquad boxed{pOH = 3.39 } {/eq} Using the relationship between pH and pOH: {eq}qquad qquad pH + pOH = 14 qquad qquad pH = 14 - pOH = 14 - 3.39 qquad qquad boxed{pH = 10.61 } {/eq}

answer:Copper, being a transition metal, can exhibit various oxidation states in compounds. When combined with sulfur and oxygen, copper can have oxidation states of +1 and +2, as seen in the compounds Cu₂SO₄, Cu₂SO₃, CuSO₄, and CuSO₃.

answer:To solve the equation sqrt{5-4 x}+sqrt{13}=7, we can first isolate the radical terms on one side of the equation. sqrt{5-4 x}=7-sqrt{13} Squaring both sides of the equation, we get: 5-4 x=(7-sqrt{13})^2 5-4 x=49-14 sqrt{13}+13 -4 x=61-14 sqrt{13} x=frac{61-14 sqrt{13}}{-4} x=frac{1}{4} left(-57+14 sqrt{13}right) Therefore, the only real solution to the equation sqrt{5-4 x}+sqrt{13}=7 is x=frac{1}{4} left(-57+14 sqrt{13}right). The answer is left{xto frac{1}{4} left(-57+14 sqrt{13}right)right}