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Questions in physics

[Answered] 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.

[Answered] 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?

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

[Answered] 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.

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

[Answered] Two balls, each with a mass of 0.844 kg, exert a gravitational force of [tex]8.45 \times 10^{-11} \, \text{N}[/tex] on each other. How far apart are the balls? The value of the universal gravitational constant is [tex]6.673 \times 10^{-11} \, \text{N m}^2/\text{kg}^2[/tex].

[Answered] What energy transformations occur in a Ferris wheel?

[Answered] The cheetah, which is the fastest land mammal, can accelerate from 0.0 mi/hr to 70.0 mi/hr in 3.0 seconds. What is the acceleration of the cheetah? Give your answer in units of mph/sec.

[Answered] Imagine two artificial satellites orbiting Earth at the same distance. One satellite has a greater mass than the other. Which of the following would be true about their motion? A. The satellite with the greater mass is being pulled toward Earth with less of a force than the other satellite. B. The satellite with the greater mass is being pulled toward Earth with a greater force than the other. C. The two satellites are being pulled with equal force by the moon. D. The two satellites are being pulled toward Earth with equal force. Imagine two artificial satellites with equal masses orbiting Earth. One satellite is orbiting closer to Earth than the other. Which of the following would be true about their motions? A. The satellite closer to Earth will be pulled toward Earth with the same gravitational pull as the other satellite. B. The satellite closer to Earth will be pulled toward Earth with less gravitational pull than the other satellite. C. Both satellites will be pulled with equal force toward the moon. D. The satellite closer to Earth will be pulled toward Earth with more gravitational pull than the other satellite. How will resistance change when the voltage increases in an electric circuit if the current remains constant? A. It will decrease. B. It will stay the same. C. It will increase. D. It will decrease, then increase.

[Answered] A toaster oven uses 67,500 joules of energy in 45 seconds to toast a piece of bread. What is the power of the oven?