A chef heats 400g of oil to a temperature of 113°C. The oil is left to cool until it reaches a temperature of 25°C. The oil transfers 70.4kJ of energy to its surroundings. Calculate the specific heat capacity of the oil.

The boy of mass 30 kg is at r1= 2 meters from the fulcrum. of the girl is 45 kg, at what r2 must she sit so that they are balanced ?

The focal length of a relaxed human eye is approximately 1.7 cm. when we focus our eyes on a close up object, we can change the refractive power of the eye by about 16 diopters. (a) does the refractive power of our eyes increase or decrease by 16 diopters when we focus closely? explain. (b) calculate the focal length of the eye when we focus closely.

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is