A 280 g block on a 60-cm-long string swings in a circle on a horizontal, frictionless table at 75 rpm. What is the speed of the block?
What is the tension in the string?

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

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joke:

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false.

explanation:

this statement is false. after falling for 5 seconds, its speed will not be 100 m/s.