Physics, 28.06.2019 15:10, milamdaniela

Aparticle contains 25 protons and 23 electrons. what type of electric charge does the particle have?

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Physics, 21.06.2019 18:20, tatemcgee

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Physics, 22.06.2019 11:30, smilequi9653

Considering only the earth's rotation, determine how much later the asteroid would have had to arrive to put the explosion above helsinki at longitude 25˚ e? this would have obliterated the city.

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Physics, 22.06.2019 17:40, cravens511peeelg

The first-order reaction a→2b+c has rate constant 0.538 s−1. if the initial concentration of a is 0.867 mol l−1, what is the half-life of the reaction in seconds? remember to use correct significant figures in your answer (round your answer to the nearest hundredth). do not include units in your response.

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Physics, 22.06.2019 21:40, iancuteodora30

Ahair dryer is basically a duct in which a few layers of electric resistors are placed. a small fan pulls the air in and forces it through the resistors where it is heated. air enters a 1200 w hair dryer at 100 kpa and 22°c and leaves at 47°c. the cross-sectional area of the hair dryer at the exit is 60 cm2. neglecting the power consumed by the fan and the heat losses through the walls of the hair dryer, determine (a) the volume flow rate of air at the inlet and (b) the velocity of the air at the exit.