Fall 2017 4 1. A sample of ore weighs 37.50 N in air. When the sample is suspend
ID: 1579676 • Letter: F
Question
Fall 2017 4 1. A sample of ore weighs 37.50 N in air. When the sample is suspended by a light cord and totally immersed in water, the tension in the cord is 28 30 N What is (a) the total volume, and (b) the density of the sample? o w (25) 2. A glass flask which has a volume of 950 cm at 0.0°C is completely filled with mercury attis temperature. When flask and mercury are heated to 100°C, 15.2 cm of mercury overflow If the coefficient of volume expansion of mercury is 18.0 x 10 per Celsius degree, compute the coeficient of volume expansion of the glass 3. A boiler with a steel bottom 2.50 cm thick rests on a hot stove. The area of the bottom is 1875 cm2. The water inside the boiler is at 100.0°C and 753 grams are evaporated every 5.35 min. (a) How much hcat per second flows into the water? (b) What is the temperature of the lower surface of the boiler? (35) 4. One hundred grams of lead shot at 100°C is dropped into 55.0 g of water at 200°C (35) which is confined in a copper can of mass 75.0 g Find the final temperature. S. Four and one-halí moles of an ideal diatomic gas is taken through the reversible cycle shown below. At point A, the pressure, volume and temperature are po, Vo and To, respectively. If To is 285K, find (a) the total heat entering the system per cycle, (b) the total heat leaving the system per cycle, 3p0 t (c) the net work done by the gas per cycle, (d) the efficiency of an engine operating in this cycle B C Po (40)Explanation / Answer
As per chegg guide lines I am working first problem, kindly post remaning questions in the next post
weight of the object in air is
W= mg= 37.50 N
mg = 37.50 N
m = 37.50/9.8= 3.82 kg
Apply Newton second law
T+ B - mg = 0
B = mg- T
37.50-28.30 = mg- T
9.2= B
formula for buoynace force is
B = rho V g
V= B/ rho g
= 9.2/1000(9.8)
=9.38 * 10^-4 m^3
(b)
rho = m/V = 3.82 kg/9.38 * 10^-4 = 4069.13 kg/m^3
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.