1.0 kW motor is used to lift an object of mass 10 kg vertically upwards at a constant speed. The efficiency of the motor is 75 %. Determine
a. the rate of heat dissipated to the surrounding b. the vertical distance travelled by the object in 5.0 s. ​

Your 249 ml cup of coffee is too hot to drink when served at 82 degree celsius. what is the mass of an ice cube taken from a -21 degree celsius freezer, that will cool your coffee to a pleasant 54 degree celsius. specific heat of the water is 4190 j/kg c, specific heat of ice is 2090 j/kg c, heat of fusion of ice is 3.33 x 10^5 j/kg

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c

Ahorizontal force of 400.0 n is required to pull a 1760 n truck across the floor at a constant speed. find the coefficient of sliding friction.