A student is trying to build his carpeting home business and is wondering how much money he will have to put aside each month to pay for using his electric saw. What will it costs him to operate his electric saw rated at 0.350kW for 5.0 hrs a day for 30 days if the cost of electrical energy is $0.06/kWh?

Aplayground slide is 8.80 ft long and makes an angle of 25.0° with the horizontal. a 63.0-kg child, initially at the top, slides all the way down to the bottom of the slide. (a) choosing the bottom of the slide as the reference configuration, what is the system's potential energy when the child is at the top and at the bottom of the slide? what is the change in potential energy as the child slides from the top to the bottom of the slide? (include the sign of the value in your answer.)