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Questions in physics

[Answered] An oscillator makes 360 vibrations in 3 minutes. a. How many vibrations does it make in one minute? b. How many vibrations does it make in one second? c. What is its period in seconds? d. What is its frequency in hertz?

[Answered] At 400 K, a volume of gas has a pressure of 0.40 atmospheres. What is the pressure of this gas at 273 K?

[Answered] It takes 56.5 kilojoules of energy to raise the temperature of 150 milliliters of water from 5°C to 95°C. If you use an electric water heater that is 60% efficient, how many kilojoules of electrical energy will the heater actually use by the time the water reaches its final temperature?

[Answered] At about 55 meters/sec, a falling parachuter (before the parachute opens) no longer accelerates due to air friction opposing acceleration. Although the effect of air friction begins gradually, imagine that the parachuter is in free fall until terminal speed (the constant falling speed) is reached. How long would it take to reach terminal speed?

[Answered] What is the mass of a pure platinum disk with a volume of [tex]113 \, \text{cm}^3[/tex]? The density of platinum is [tex]21.4 \, \text{g/cm}^3[/tex]. Give your answer in grams and kilograms.

[Answered] What is the total displacement of a bee that flies 2 meters east, 5 meters north, and 3 meters east?

[Answered] The density of cork is [tex]0.24 \, \text{g/cm}^3[/tex]. What is the volume of a 240-gram piece of cork?

[Answered] A pendulum takes 10 seconds to swing through 2 complete cycles. a. How long does it take to complete one cycle? b. What is its period? c. What is its frequency?

[Answered] What is the potential energy of a 2-kilogram potted plant that is on a 1 meter-high plant stand?

[Answered] Acceleration refers to: A. increasing speed B. decreasing speed C. changing direction D. all of the above