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Questions in physics

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

[Answered] The specific heat capacity of a pure substance can be found by dividing the heat needed to change the temperature of a sample of the substance by the mass of the sample and by the change in temperature. The heat capacity of a certain substance has been measured to be [tex]$4.35 \frac{J}{ g \cdot{ }^{\circ} C }$[/tex]. Suppose [tex]$310. g$[/tex] of the substance are heated until the temperature of the sample has changed by [tex]$21.4^{\circ} C$[/tex]. Write an equation that will let you calculate the heat [tex]$Q$[/tex] that was needed for this temperature change. Your equation should contain only symbols. Be sure you define each symbol. Your equation: [tex]$Q=$[/tex] Definitions of your symbols: [tex]$\square$[/tex] [tex]$=21.4^{\circ} C$[/tex]

[Answered] Which of the following is something you should do prior to using electrical equipment? A. Inspect and evaluate the equipment for any defects or damage B. Remove the ground from 3-prong plugs C. Wet the cord to ensure it doesn't overheat

[Answered] On the Fahrenheit scale, how many degrees are there between the freezing and boiling points of water? Select one: A. $100^{\circ}$ B. $180^{\circ}$ C. $212^{\circ}$ D. $60^{\circ}$

[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] (1) Calculate max velocity [tex]$30 m / s$[/tex] (2) Acceleration in first 3 sec. (2) Acceleration below 3 sec & 8 sec 3. [tex]$a=\frac{v-v}{t}$[/tex] from 3 to 8 [tex]$0=30 m / s$[/tex] [tex]$v=30 m / s$[/tex] [tex]$x=\frac{30-30}{5}$[/tex] From 8 [tex]$\mu=30 r$[/tex] [tex]$v=0$[/tex] [tex]$t=25$[/tex] [tex]$a=$[/tex]

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