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Questions in physics

[Done] 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?

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

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

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

[Done] 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?

[Done] A coin rolls across the floor at an angular speed of 4 rotations per second. What is its speed in degrees per second? Hint: One full rotation equals 360 degrees.

[Done] A cat is being chased by a dog. Both are running in a straight line at constant speeds. The cat has a head start of 3.8 meters. The dog is running with a speed of 8.9 m/s and catches the cat after 6.0 seconds. How fast did the cat run?

[Done] Volume, mass, and weight can be measured with balances, scales, and _______?

[Done] Saturn has a radius of 60,330,000 meters and a mass of \(5.7 \times 10^{26}\) kilograms. Calculate the strength of its gravitational field.

[Done] Name the four main elements that make up 95% of an organism.