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Questions in physics

[Open]A lizard accelerates from 2 m/s to 10 m/s in 4 seconds. What is the lizard's acceleration?

[Open]A 25.0 kg child on a swing kicks upward on the downswing, changing the distance from the pivot point to her center of gravity from 2.40 m to 2.28 m. What is the difference in the resonant frequency of her swing before the kick and afterwards? Answer to three significant digits.

[Open]Compare and contrast the three classes of levers.

[Open]What is the acceleration of a 10 kg mass pushed by a 5 N force?

[Open]What happens when a solid object with a lower density is placed in a liquid with a greater density?

[Open]What kind of device can you use to separate visible light into its different colors?

[Open]Does the Eiffel Tower lean into the shade when it's sunny outside?

[Open]A 5 g bullet moving at 100 m·s\(^{-1}\) strikes a police dog and lodges in his shoulder. The bullet undergoes uniform acceleration and penetrates to a depth of 6 cm. Calculate the time taken for the bullet to stop.

[Open]Explain the role of energy in changes of state.

[Open]Is it possible for a speed of 254 and a speed of 100 to be the same speed?