Một con lắc lò xo dao động theo phương thẳng đứng với biên độ 3,6cm. Tỉ số độ lớn lực đàn hồi ở 2 biên gấp 4 lần nhau. Biết rằng lò xo luôn dãn trong quá trình dao động. Độ biến dạng của lò xo khi vật ở vị trí cân
bằng là:

The eel has a certain amount of rotational kinetic energy when spinning at 14 spins per second. if it swam in a straight line instead, about how fast would the eel have to swim to have the same amount of kinetic energy as when it is spinning?

From 0 to 5 seconds john pushed a box 5 meters. from 5 to 10 seconds, paul pushed the same box another 5 meters. who did more work? a. john b. paul c. john and paul did the same amount of work.

At an oceanside nuclear power plant, seawater is used as part of the cooling system. this raises the temperature of the water that is discharged back into the ocean. the amount that the water temperature is raised has a uniform distribution over the interval from 10° to 25° c. what is the standard deviation of the temperature increase?