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Questions in physics

[Answered] The density of ice is 0.92 g/cm\(^3\). An ice sculptor orders a one cubic meter block of ice. What is the mass of the block? Hint: 1 m\(^3\) = 1,000,000 cm\(^3\) Give your answer in grams and kilograms.

[Answered] A particle is moving along the x-axis so that its position at any time [tex]t \geq 0[/tex] is given by [tex]x(t) = 2te^{-t}[/tex]. A) Find [tex]v(t)[/tex]. B) Find [tex]a(t)[/tex]. C) At [tex]t = 0[/tex], is the particle slowing down or speeding up? Explain. D) At what time(s), if any, does the particle change directions? Justify your answer.

[Answered] A merry-go-round makes 18 rotations in 3 minutes. What is its angular speed in rotations per minute (rpm)?

[Answered] You are given two solid materials, one that is organic and one that is not organic. Describe three tests you could perform to help you decide which is which.

[Answered] A marble rolling at a speed of 2 meters per second falls off the end of a 1-meter high table. How long will the marble be in the air? a. What do you know? b. What do you need to solve for? c. What equation(s) will you use? d. What is the solution to this problem?

[Answered] A lever used to lift a heavy box has an input arm of 4 meters and an output arm of 0.8 meters. What is the mechanical advantage of the lever?

[Answered] How can two substances be made up of the same two elements but have very different properties?

[Answered] What is your rate in miles per hour if you run at a speed of 2.2 miles in 20 minutes?

[Answered] Yellow light has a longer wavelength than green light. Which color of light has the higher frequency?

[Answered] While traveling along a highway, a driver slows from 24 m/sec to 15 m/sec in 12 seconds. What is the automobile’s acceleration?