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Questions in physics

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

šŸ“ Answered - What is the wavelength of light with a frequency of [tex]$7.21 \times 10^{14}$[/tex] Hz? A. 628 nm B. 721 nm C. 237 nm D. 416 nm

šŸ“ Answered - How much heat is required to raise the temperature of 1 kg of water from 20Ā°C to 70Ā°C? (Specific heat 4200 J/kgĀ°C) A. 210,000 J B. 252,000 J C. 180,000 J D. 50,000 J

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

šŸ“ Answered - Sound Wave A is moving through a medium that is decreasing in temperature. Sound Wave B is moving from a liquid to a gas medium. Which statement can be made about both waves? A. They will speed up. B. They will increase the density of their medium. C. They will slow down. D. They will decrease the density of their medium.

šŸ“ Answered - Enter the following expression in the answer box below: $\sqrt{\frac{2 g \lambda^3}{m}}$, where $\lambda$ is the lowercase Greek letter lambda.

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

šŸ“ Answered - What frequency corresponds to an absorption line at 460 nm? A. $6.52 x 10^{14} Hz$ B. $4.32 x 10^{14} Hz$ C. $1.53 x 10^{14} Hz$ D. $6.88 x 10^{14} Hz

šŸ“ Answered - Select the correct answer. Jackson is conducting an experiment for his Physics class. He attaches a weight to the bottom of a metal spring. He then pulls the weight down so that it is a distance of 6 inches from its equilibrium position. Jackson then releases the weight and finds that it takes 4 seconds for the spring to complete one oscillation. Which function best models the position of the weight? A. [tex]s(t)=-6 \cos (2 \pi t)[/tex] B. [tex]s(t)=-6 \cos \left(\frac{\psi}{2} t\right)[/tex] C. [tex]s(t)=6 \sin \left(\frac{\pi}{2} t\right)[/tex] D. [tex]x(t)=6 \sin (2 \pi t)[/tex]

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