Physics, 06.05.2020 15:57, Cristian9059

Only question 1 and 2 pls

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Physics, 22.06.2019 15:10, maudiejane

An important dimensionless parameter concerned with very high-speed flow is the mach number, defined as v/c, where v is the speed of the object such as an airplane or projectile, and c is the speed of sound in the fluid surrounding the object. for a projectile traveling at 1170 mph through air at 50 ˚f and standard atmospheric pressure, what is the value of the mach number?

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Physics, 22.06.2019 15:20, ineedhelp2285

Aphoton is absorbed by an electron that is in the n = 3 state of a hydrogen atom, causing the hydrogen atom to become ionized. very far away from the nucleus, the released electron has a velocity of 750,000 m/s. what was the wavelength of the absorbed photon?

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Physics, 22.06.2019 15:30, bloodry

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples

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Physics, 23.06.2019 02:20, cathydaves

What are known as the properties of substances that describe a substance et does not change that substances?

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