Physics Answers

In an explosive volcanic eruption, a molten rock spewed _ out from the craterof the volcano reaches a maximum height of 2.481 km above ground. After 37.0 since it WaS released, it hit the ground, distance 5.25 km away from the crater: How much time did it took the molten rock "iio t0 reach the maximum height? () What is the magnitude and direction of the velocity of the molten rock as it was Ay thrown out from the crater? (c) How high is the volcano? 5.25 km (d) What is the magnitude and direction of the velocity of the molten rock when it landed on the ground?

1. Three capacitors with individual capacitances of 2 μF, 5 μF, and 10 μF respectively are connected in series with a 12V battery. What are the total capacitance and total charge in the network? 2. Same capacitors in number 1 connected in a parallel. If the combined charge in the network is 50 μC, what are the total voltage and total capacitance in the network?

A copper wire has a resistance of 𝟏𝟓. 𝟎Ω at a temperature of 14℃. After a

current passes through the windings, the resistance rose to 𝟏𝟐. 𝟓Ω. To what

temperature was the wire heated?

Determine the ratio of stimulated and spontaneous emission rates. Predict the temperature at which these rates will be same for wavelength 1000 nm.

Calculate the elictric field felt by a positive test charge located half way between a charge of +1C and charge of -3C, that are 2m apart.

A charge of 6 × 10−7𝐶 is transferred from infinity to point B. If the work

done by the electric force to do this is 1.2 × 10−5𝐽. What is the potential at point

B?

A watt is a unit of energy per unit time, and one watt (W) is equal to one joule per second (Jasa 1) A 60.0 W incandescent lightbulb produces about 5.00% of its energy as has an average wavelength of 5100 nm. calculate how many such photons are emitted per second by a 60.0W incandescent lightbulb.

if a 6 volt battery of external resistance 0.5ohms connected to 3 resistors of values 3 ohms,4 ohms,5 ohms.calculate the current in each resistor,the potential difference across the 3ohm resistor and across the parallel resistors.

Find the magnitude of an electron's electric field if the field itself is 50cm away from it.

The capacitors have values C1= 2.0 uf and C2= 4.0 uF, C3=5.0 uF C4= 7.0 uF and the potential difference across the battery is 9.0 V. Assume that the capacitors are connected in parallel