Specific heat capacity depends on the mass of the substance. True or False? a) True b) False
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Specific heat capacity depends on the mass of the substance. True or False?
a) True
b) False
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- 1. a) A man weighing 765 N is on a bed of nails. Calculate the pressure exerted by each nail if there are 1,000 nails and each tip has a radius r = 0.500mm (5.00 x 104 m). b) Calculate the pressure exerted on the skin by acupuncture needle of radius r = 0.100mm (1.00 x 10 m) applied with a force of 3.00 N. Ans. a. 9.74 x 10³ Pa b. 1.59 x 108 Pa [Note that the Coletta text uses N/mm², which is a needless use of non-SI units.]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.Choose the correct answer 1. You have a 90 cm long iron rod at 15 ° C that heats up to 300 ° C. What happens with the rod is that: A. It melts. B. Double the length. C. Decrease its length a few centimeters. D. Increase its length by a few millimeters. 2. A student blows up a balloon and places it in his home freezer. After a long time, the balloon is removed from the freezer and it is observed that: A. The volume decreases as a certain amount of air escapes. B. It remains the same, because the air inside it does not expand or contract. C. The volume increases, because the air inside it expands D. The volume decreases as the air inside it contracts
- I need the answer as soon as possibleThe heat conducted through a bar depends on which of the following? A. The coefficient of linear expansionB. The thermal conductivityC. The specific heat capacityD. The length of the barE. The cross-sectional area of the bar A, C, and D A, B, and D B, C, D, and E B, D, and E C, D, and E0.4 kg water is at room temperature 23 degrees in an aluminum container. An unknown metal with 0.5 kg mass is placed inside the water raising its temperature to 40 degrees. A)What is the specific heat of the unknown metal. B) Would the equilibrium temperature greater, less or the same if the system was not properly isolated.