Q. 1: Two objects sliding on a frictionless surface, as represneted below, collide and stick together. How much kinetic energy is converted to heat during collision. 0.5 kg, 2 m/s |kg, 1 m/s Figure 1
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- A certain mass, m, of water has thermal energy added to it until the water is at the boiling point. Additional thermal energy is added until the entire mass, m, has been phased changed into steam. a) The temperature of the steam will be less than that of the water at the boiling point. b) The temperature of the steam will be greater than that of the water at the boiling point. c) The temperature of the steam will be the same as that of the water at the boiling point. d) The temperature of the steam will be zero. e) The temperature of the steam will be 2256000K.Heating substances in the sun: The following table shows the temperature after 10.0 grams of four different substances have been in direct sunlight for up to 60 minutes. Time (minutes) O (initial) 15.0 min 30.0 min 45.0 min 60.0 min Temperature (°C) 70 60 50 40 PART I: Experiment 1. Create a line graph for each substance on graph below. (You can use Excel or similar program) Label the substances. Temperature vs Heating Time 30 20 0 Air (°C) 25°C 28.9°C 32.5°C 36.2°C 40°C 10 Water (°C) 25°C 26.2°C 27.5°C 28.8°C 30°C 20 Time (minutes) 30 40 Sand (C) 25°C 30°C 50 35°C 40°C 45°C 60 Metal (°C) 25°C 35°C 45°C 55°C 65°CQ.13 What happens if you add heat to water that is at the temperature of 100°C? Does the temperature change? Explain.
- A 1200-kg car travels along a street at 18 î m/s. When it comes to an intersection, it does not stop and it collides with a 2500-kg truck travelling at 11 ĵ m/s. The car and the truck become completely entangled in the collision. a) What is the magnitude and direction of the velocity of the combined car and truck immediately after the collision? b) How much energy is converted into heat (and sound)?Hi, could I get some help with this work-heat-First Law of Thermodynamics physics problem involving calorimetry? The set up is: How many kilocalories (kcal) of heat are required to increase the temperature of one liter of water by 55 degree celsius (C) to 4 digits of precision, assuming the specific heat of water is 1 cal/gram K, with density of 1 g/cm3? Thank you.Q7.
- When a cooked chicken breast is first removed from an oven, it has a surface temperature of 180 C. By the time the chicken is served at the table it has cooled to 120 C. What is the ratio of energy flux density emitted from the surface of the chicken when it has cooled to that when it was hot? Group of answer choices A. depends on mass of the chicken B. 0.20 C. 0.57 D. 0.67 E. depends on surface area of the chickenPlease don't provide handwritten solution...Q4: When you are sick your body temperature may be 39.0oC, compared to normal body temperaturegiven by 36.8oC. It was observed that body increased 0.525 MJ of heat energy. Calculate your mass? Takespecific heat of human body as Chaman=3470 J/kgoC. Human body cannot survive without sufficient watercontent in body. Justify your opinion based on scientific knowledge. If you replace water content of bodywith some other liquid, what changes you can observe?
- A copper sample (ccu = 387 J/kg•K) of mass mẹ = 75 g and temperature Te = 312ºC is dropped into a glass beaker that contains a mass of water me = 220 g (cw = 4190 J/kg•K). %3D The initial temperature of the water and the beaker is Tw,b = 12.0°C. What is the final temperature of the copper, beaker, and water? * The heat capacity (the specific heat times the mass) of the beaker is Cb' = 190 J/K.How do I calculate L?Double-glazed windows are usually made of two glass panes with a thin layer of air sealed between the panes. a. Why do these windows reduce heat loss to a much greater extent than occurs if the double glazing is replaced by a thicker glass instead? b. Why does the insulating effect of the double glazing decrease if the two glass panes are too far apart? Explain.