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Questions in physics

📝 Answered - Compare the intensity of light 2 meters away from a lit match to the intensity 6 meters away from the match.

📝 Answered - A liquid with a specific heat of 1,900 J/kg·°C has 4,750 joules of heat energy added to it. If the temperature increases from 20°C to 30°C, what is the mass of the liquid?

📝 Answered - A cannonball is launched with a speed of 170 m/s at 40 degrees above the horizontal. Find the components into which it is resolved.

📝 Answered - A compass is a magnet, and Earth is a magnet. How does the magnetism of a compass work with the magnetism of Earth to make a compass a useful tool for navigating?

📝 Answered - A bulldozer does 30,000 joules of work to push a boulder a distance of 20 meters. How much force is applied to push the boulder?

📝 Answered - An ambulance is traveling east at 51.6 m/s. Behind it, there is a car traveling in the same direction at 32.3 m/s. The ambulance driver hears his siren at a frequency of 615 Hz. - 32.3 m/s Car - 51.6 m/s Ambulance What is the wavelength of the sound of the ambulance’s siren if you are standing at the position of the car? The velocity of sound in air is 343 m/s. Answer in units of meters.

📝 Answered - A child sits two meters from the center of a merry-go-round. How far does she travel during one revolution?

📝 Answered - Determine the acceleration of a 34.0 kg block along a frictionless inclined plane at a 35° slope.

📝 Answered - You want to describe the harmonic motion of a swing. You find out that it takes 2 seconds for the swing to complete one cycle. What is the swing's period and frequency?

📝 Answered - You decide to add up all the work you did yesterday. If you accomplished 10,000 newton·meters of work yesterday, how much work did you do in units of joules?