a cocrete block of mass 35kg is pulled along a horizontal floor with the aid of a rope inclined at an angl 30 degrees to the horizontal. If the coefficient friction is 0.75, calculate the force required to move the block over the floor

Which statement best explains why an object weight less on mercury than it does on earth

The pressure, volume, and temperature of a mole of an ideal gas are related by the equation pv = 8.31t, where p is measured in kilopascals, v in liters, and t in kelvins. use differentials to find the approximate change in the pressure if the volume increases from 14 l to 14.6 l and the temperature decreases from 375 k to 370 k. (round the answer to two decimal places.)

Could someone me find the answer to this problem.