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Recent questions tagged physics

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asked Nov 10, 2021 in Physics & Chemistry by MathsGee Platinum (119,184 points) | 64 views
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asked Nov 10, 2021 in Physics & Chemistry by MathsGee Platinum (119,184 points) | 74 views
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asked Oct 5, 2021 in Physics & Chemistry by Digitized Wooden Status (1,318 points) | 104 views
Two metal spheres, \(\mathrm{M}\) and \(\mathrm{N}\), on insulated stands carry charges \(+\mathrm{Q}_{\mathrm{M}}\) and \(-6 \mathrm{nC}\) respectively. Two identical negatively charged spheres, \(A\) and \(B\), having charges of the same magnitude, . . . Two metal spheres, \(\mathrm{M}\) and \(\mathbf{N}\), are on insulated stands. \(\mathrm{M}\) with charge of \(-4 \mathrm{nC}\) is placed \(30 \mathrm{~mm}\) away from N. Two metal spheres, \(\mathbf{P}\) and \(\mathbf{Q}\), on insulated stands, carrying charges of \(+5 \times 10^{-9} \mathrm{C}\) and \(+5 \times 10^{-9} \mathrm{C}\) respectively, are placed with their centres \(20 \mathrm{~mm}\) apart. Two metal spheres, \(\mathbf{P}\) and \(\mathrm{T}\), on insulated stands, carry charges of \(+3 \times 10^{-9} \mathrm{C}\) and \(-6 \times 10^{-9} \mathrm{C}\) respectively. In the circuit below, the EMF reading is 12 V. The voltmeter reading over the 4 Ω resistor is  4.8 V. Calculate the internal resistance of the battery.
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asked Aug 30, 2021 in Physics & Chemistry by MathsGee Platinum (119,184 points) | 97 views
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asked Aug 9, 2021 in Mathematics by Maths Genie Bronze Status (5,562 points) | 107 views
The angle of elevation of the top of cell phone tower $B$ from the top of cell phone tower $A$ is $30^{\circ}$. The angle of depression of the foot of cell phone tower B from the top of cell phone tower A is $60^{\circ}$.
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asked May 19, 2021 in Physics & Chemistry by MathsGee Platinum (119,184 points) | 95 views
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In the circuit below, the battery has an internal resistance $r$ and an emf $\varepsilon$. A variable resistor $R$ is connected in the circuit and the ammeter and voltmeter register readings. Two identical metal spheres, $\mathbf{P}$ and $\mathbf{R}$, on insulated stands, carry different charges. The spheres are brought into contact and then separated again. For which quantity is the magnitude a resonable estimate?
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asked Apr 13, 2021 in Physics & Chemistry by Edzai Zvobwo Bronze Status (9,010 points) | 325 views
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asked Mar 29, 2021 in Physics & Chemistry by Eddie Wooden Status (2,016 points) | 204 views
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asked Mar 29, 2021 in Physics & Chemistry by Eddie Wooden Status (2,016 points) | 134 views
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asked Mar 26, 2021 in Physics & Chemistry by MathsGee Platinum (119,184 points) | 308 views
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asked Mar 26, 2021 in Physics & Chemistry by MathsGee Platinum (119,184 points) | 205 views
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asked Mar 8, 2021 in Mathematics by MathsGee Platinum (119,184 points) | 175 views
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asked Nov 19, 2020 in Physics & Chemistry by anonymous | 120 views

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