What is the heat in calories required to raise the temperature of 0.05 kg of water from 0 degrees C to 100 degrees C? O 5 cal O 5000 cal O 20,900 cal O20.9
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- mmh One ounce of a well-known breakfast cereal contains 110 Calories (1 food Calorie = 4186 J). If 2.0% of this energy could be converted by a weight lifter's body into work done in lifting a barbell, *53. what is the heaviest barbell that could be lifted a distance of 2.1 m?In a laboratory, bunsen burner is used to increase the temperature of lime from 10 °C to 50 °C with the thermal energy of 80000 J. If the mass of the lime is 20 kg the specific heat capacity in of the lime would be A. 25 J/kg Co В В. 50 J/kg C° C. 75 J/kg C° D. 100 J/kg C° E. No answerA(n) 80.0-kg student eats a 160-Calorie doughnut. To burn-it-off, he decides to climb the steps of a tall building. How high (in m) would he have to climb to expend an equivalent amount of energy (by doing work)? А. 707.0 m D. 714.8 m В. 859.4 m E. 703.1 m С. 1044 m F. 854.3 m
- What is the specific heat of an 800g unknown substance whose temperature changes by 78◦C after absorbing 1000 calories of heat? a. 0.016 cal/g◦C b. 0.016 J/g◦C c. 62,400 J/kg◦CIf 1500 J of heat are added to 70 g of water initially at 20 ° C, a. how much energy is this in calories? b. what is the final temperature of the water?The initial temperature of 150 g of ice is -20°C. The spe-cific heat capacity of ice is 0.5 cal/g.C° and water's is1 cal/g•C°. The latent heat of fusion of water is 80 cal/g.a.How much heat is required to raisethe ice to 0°C andcompletely melt the ice?b. How much additional heat is required to heat the water(obtained by melting the ice) to 25°C?C.What is the total heat that must be added to convert the80 g of ice at-20°C to water at +25°C?d. Can we find this total heat simply by computing howmuch heat is required to melt the ice and adding theamount of heat required to raise the temperature of 80 gof water by 45°C? Explain
- An ice-cube tray of negligible mass contains 0.290 kg ofwater at 18.0°C. How much heat must be removed to cool the water to0.00°C and freeze it? Express your answer in joules, calories, and BtuA 65-kg indoor rock climber eats an energy bar that has 500 kilocalories to fuel an afternoon of climbing. If the climber has a typical 20% efficiency for energy used by the body, how many times can the climber scale an 11.8-m wall using the energy provided by the bar? (1.00J = 4.184 cal) A. two timesB. three timesC. twelve timesD. fifteen timesHow much energy will be consumed by a 400W rice cooker operating for half an hour?a. 12 Jb. 24 kJc. 72 kJd. 720 kJ8. A metallic key ring is cooled down. Which of the following will happen to the insidediameter of the key ring?a. Shrinkb. Expandc. Stay at the same sized. None of the above9. What happens to the internal energy of a gas if increasing temperature under constantvolume?a. Decreaseb. Increasec. Do not changed. Cannot be determined
- How much heat transfer is required to completely boil 1500 g of water (already at its boiling point of 100°C) into a gas? J A ceramic container used for melting metals (called a crucible) contains 1.30 kg of a molten metal. The liquid metal cools until it reaches its melting point of 1,749°C. A scientist then measures that 2.99 ✕ 104 J of heat is transferred out of the metal before it completely solidifies. What is the latent heat of fusion of this metal, in J/g? (Be careful with units!)You want to heat your oven to 400°F. Given that your oven has a surface area of 1m2, about how much power is being emitted by your oven? a. 477 W b. 895 W c. 1600W d. 2947 W23.0 g of copper pellets are removed from a 300 degree celsius oven and immediately dropped i to a 80.0 mal of water at 20.0 celsius in an insulated cup. What will the new water temperature be? Please help! I can't figure this question out.