A student attaches a rope to a box and pulls the box up a ramp as shown below. The ramp has a rough surface. When drawing the free body diagram for the box, the friction force should be directed:
O up and to the right
down and to the left
up and to the left
to the left
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Which subatomic particle has a negative charge

Awhite-blue star is hotter than a red star. select the best answer from the choices provided true or false

When a lead acid car battery is recharged by the alternator, it acts essentially as an electrolytic cell in which solid lead(ii) sulfate is reduced to lead at the cathode and oxidized to solid lead(ii) oxide at the anode. suppose a current of is fed into a car battery for seconds. calculate the mass of lead deposited on the cathode of the battery.