Noah en Meryem testen een zonnespiegel, zie de afbeelding. De spiegel bundelt de warmtestraling van de zon naar één punt. Op die plek hebben ze een zwarte pan met 2,0 kg water gezet. De oppervlakte van de spiegel is 3,0 m2. De warmtestraling van de zon is op een heldere zomerdag 1,0 kW m−2. De spiegel weerkaatst hiervan 80%. Norah en Meryem willen dat de temperatuur van het water met 80 °C stijgt. Neem aan dat het water 50% van alle warmtestraling die op de pan valt opneemt. De warmtecapaciteit van water is 4,18∙103 J kg−1 K−1.

Hoeveel minuten duurt dit opwarmen? hi

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

Acylinder with a movable piston contains 11.7 moles of a monatomic ideal gas at a pressure of 1.32×10^5 pa. the gas is initially at a temperature of 300 k. an electric heater adds 43200 j of energy into the gas while the piston moves in such a way that the pressure remains constant. cp=20.79 j k^−1 mol^−1 for a monatomic ideal gas, and that the number of gas molecules is equal to avogadro's number (6.022×10^23) times the number of moles of the gas. (a) what is the temperature of the gas after the energy is added? (b) what is the change in volume of the gas? (c) how much work is done by the gas during this process?

Identify the correct relation showing that the radius r of the orbit of a moon of a given planet can be determined from the radius r of the planet, the acceleration of gravity at the surface of the planet, and the time τ required by the moon to complete one full revolution about the planet. determine the acceleration of gravity at the surface of the planet jupiter knowing that r = 71 492 km and that t= 3.551 days and r= 670.9 × 10^3 km for its moon europa.