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Questions in physics

[Answered] In an adiabatic process (one in which no heat transfer takes place), the pressure [tex]$P$[/tex] and volume [tex]$V$[/tex] of an ideal gas such as oxygen satisfy the equation [tex]$P^5 V^7=C$[/tex] where C is a constant. Suppose that at a certain instant of time, the volume of the gas is 5 L, the pressure is 100 KPA, and the pressure is decreasing at the rate of 5 KPA/SEC. Find the rate at which the volume is changing.

[Answered] The quantity Q of charge in coulombs [tex]$C$[/tex] that has passed through a point in a wire up to time [tex]$T$[/tex] (measured in seconds) is given by [tex]$Q(t)=t^3-3 t^2+4 t+3$[/tex]. Find the current when [tex]$T=4 s$[/tex].

[Answered] Convert $106^{\circ} C$ to Kelvin. $106^{\circ} C=[?] K$

[Answered] The mass of part of a wire is [tex]$x(1+\sqrt{x})$[/tex] kilograms, where [tex]$x$[/tex] is measured in meters from one end of the wire. Find the linear density of the wire when [tex]$x=36 m$[/tex].

[Answered] Saturn has 1.06 times the gravity of the Earth. Which statement is true for a book that an astronaut takes to Saturn? A. The book would weigh the same both places. B. The book would weigh more on the Earth. C. The book would weigh more on Saturn.

[Answered] Measurements of two electric currents are shown in the chart. Electric Currents | Current | Volts | Amperes | |---|---|---| | X | 1.5 | 7.8 | | Y | 9 | 0.5 | Which best compares the two currents? A. Current X has a greater potential difference, and the charges flow at a slower rate. B. Current Y has a greater potential difference, and the charges flow at a slower rate. C. Current X has a greater potential difference, and the charges flow at a faster rate. D. Current Y has a greater potential difference, and the charges flow at a faster rate.

[Answered] THE HEIGHT (IN METERS) OF A PROJECTILE SHOT VERTICALLY UPWARD FROM A POINT 5.5 M ABOVE GROUND LEVEL WITH AN INITIAL VELOCITY OF $25.48 M / S$ [tex]h=5.5+25.48 t-4.9 t^2[/tex] IS AFTER T SECONDS. A) WHEN DOES THE PROJECTILE REACH ITS MAXIMUM HEIGHT? B) WHAT IS THE MAXIMUM HEIGHT?

[Answered] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Answered] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Answered] Select the best answer for the question. An object with a mass of 120 kilograms is moving at a velocity of 60 m/s. What's its momentum? A. 2 kg-m/s B. 7,200 kg-m/s C. 0.5 kg-m/s D. 3,600 kg-m/s