IdeasCuriosas - Every Question Deserves an Answer Logo

Questions in physics

[Answered] How does Coulomb's law relate to test charges?

[Answered] You lift a 45-newton bag of mulch 1.2 meters and carry it a distance of 10 meters to the garden. How much work was done?

[Answered] Which of the following corresponds to a supersonic speed? A. Mach 0.5 B. Mach 1.0 C. Mach 1.5

[Answered] Fiber-optic cables are used widely for internet wiring, data transmission, and surgeries. When light passes through a fiber-optic cable, its intensity decreases with the increase in the length of the cable. If 1500 lumens of light enter the cable, the intensity of light decreases by 3.4% per meter of the cable. Write a function \( f(x) \) to represent the intensity of light, in lumens, when it has passed through \( x \) meters of the cable.

[Answered] 1) How will the total distance traveled by a car in 2 hours be affected if the average speed is doubled? 2) A spider is crawling on the wall. First, it crawls 1 meter up, then 1 meter left, and then 1 meter down. What is its total displacement? 3) A jogger travels 8.0 km in 1.25 hours. What is the jogger's average speed?

[Answered] Physical form in which a substance can exist.

[Answered] How do you find the actual diameter of a star when converting from arcseconds to kilometers? Example: The supergiant star Betelgeuse (in the constellation Orion) has a measured angular diameter of 0.044 arcseconds. Its distance has been measured to be 427 light-years. What is the actual diameter of Betelgeuse?

[Answered] Light in a vacuum travels at a speed of [tex]$3.00 \times 10^8$ m/s[/tex]. On average, Earth is 93,000,000 miles from the Sun. How many minutes does it take sunlight to reach Earth? Show your work.

[Answered] Calculate the time it takes to cover a distance of 45 km at a speed of 20 km per hour.

[Answered] A fire hose 5 centimeters in diameter is used to fill a 225-liter bucket. If it takes 15 seconds to fill the bucket, what is the speed at which water is flowing through the hose?