13. A certain force gives a 15kg objcct an acceleration of 8m/s. The same force will accelerated a 40 kg object at: A. 4m/s
B. 3m/s
C. 2m/s
D. 6m/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

It is really hard for me right know

The law of reflection states that the angle of reflection is equal to the angle of