Homework Statement
Suppose line tangent to graph of y=f(x) at x =3 passes through (-3, 7) & (2,-1).
Find f'(3), what is the equation of the tangent line to f at 3?
Homework Equations
I found the slope of which equals -8/5
Im not sure how to find the equation... do I do...
Homework Statement
Initially, A yoga ball is partially blown up and its surface area measured. Afterwards, it is filled completely and its surface area is found to be 1.50 times as big as it was recorded earlier. By what factor has its volume changed?
Im not sure how to solve for...
Homework Statement
The weight of a baby measured over an 11-month period is given in the weight chart below for this problem.
Weight (lb) Age (months)
6.6 0 (birth)
7.4 1.0
9.6 2.0
11.2 3.0
12.0 4.0
13.6 5.0...
Homework Statement
A certain engine can propel a 1600 kg car from rest to a speed of 22 m/s in 9.7 s with an efficiency of 23%.
what is the rate of heat flow into the engine at the high temperature?
what is the rate of heat flow out of the engine at the low temperature?
2. Homework...
Homework Statement
Suppose a monatomic ideal gas is changed from state A to state D by one of the processes shown on the PV diagram. (Let V1 = 4.80 L and P1 = 3.30 atm.)
(a) Find the total work done on the gas if it follows the constant pressure path A−E followed by the constant...
rate will this student "burn" calories
Homework Statement
A student wants to lose some weight. He knows that rigorous aerobic activity uses about 700 kcal/h (2900 kJ/h) and that it takes about 2000 kcal per day (8400 kJ) just to support necessary biological functions, including keeping the...
Q/ Time = (Thermal conductivity) x (Area) x (Thot - Tcold)/Thickness
thermal conductivity of copper = 401 W/m K
thermal conductivity of iron = 80 W/m K
For copper heat conduction:
Q/t = 401 * .0006 m^2 * (100C - 0C) / .20 m thickness
Q/t = 120.3 watts conduction heat loss up to iron...
Homework Statement
A copper rod of length 0.20 m and cross-sectional area 6.00 10-2 cm2 is connected to an iron rod with the same cross section and length 0.28 m (the figure below). One end of the copper is immersed in boiling water and the other end is at the junction with the iron. If the...
Homework Statement
At 0.0° C and 1.00 atm, 0.95 mol of a gas occupies a volume of 0.0213 m3.
(b) Estimate the average distance between the gas molecules.
Homework Statement
What fraction of the air molecules in a house must be pushed outside while the furnace raises the inside temperature from 17.0° C to 28.0° C? The pressure does not change since the house is not 100% airtight.
Homework Equations
v2/v1=17+273/28+273
=.963
Why is my...