the imagine above shows to opposite forces acting on a rolling cart, what can we say is true about affect of the forces on the cart?

Asmall metal bar, whose initial temperature was 10° c, is dropped into a large container of boiling water. how long will it take the bar to reach 70° c if it is known that its temperature increases 2° during the first second? (the boiling temperature for water is 100° c. round your answer to one decimal place.) sec how long will it take the bar to reach 98° c? (round your answer to one decimal place.)

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?

Difference between series and parallel circuits