US import oil because it is cheaper to import oil than to produce it
<h3>What is importation?</h3>
Importation is a way of bringing in goods and services from neighbouring country into your country.
Countries import because it helps them to supply high cost and scarce resources to its market with products from other countries at a very cheap rate.
Hence we can conclude that US import oil because it is cheaper to import oil than to produce it.
Learn more on importation here: brainly.com/question/24473707
#SPJ2
The three formula for finding out the 3 types of the slope of curve Q with respect to L should be explained below.
<h3>Three formulas:</h3>
1. Slope intercept form where the formula is y = mx + b
Here
y = variable
m = slope of line
x = variable
b = y intercept
2. Point slope form where the formula is y - y1 = m(x - x1)
Here
y = variable
y1 = y coordinate at the first point on line
m = the slope
x = variable
x1 = x coordinate at the first point on line
3. Standard slope form where the formula is ax + by = c
Here
a = x coefficent
b & c = constant term
learn more about formula here: brainly.com/question/24454271
Answer:
origin
Explanation:
The point of intersection of axis is called origin.
In 2D origin is the intersection point of x-axis and y-axis if we go right to the origin then it is positive x axis, if we go left side of origin then it is negative x- axis
Similarly when we go above the origin then it positive y axis , and if we go bellow the origin then it is negative x axis
In 3D origin is the intersection of x-axis, y-axis and z-axis
NOTE- For defining i take here x axis as horizontal axis and y-axis as vertical axis
Answer:
Explanation:
We feel chilled in summer but comfortable in the summer under the same temperature because of our thermal comfort.
Thermal comfort is a function of heat loss from the body and during winter there is excessive heat loss due to heat flux.
As room temperature is fixed so summer and winter comfort cannot be attributed due to heat loss by convection. Due to differences in heat flux radiations in summer and winter there is a chilled feeling associated with winters.
Answer:
A) EXIT TEMPERATURE = 14⁰C
b) rate of heat transfer of air = - 13475.78 = - 13.5 kw
Explanation:
Given data :
diameter of duct = 20-cm = 0.2 m
length of duct = 12-m
temperature of air at inlet= 50⁰c
pressure = 1 atm
mean velocity = 7 m/s
average heat transfer coefficient = 85 w/m^2⁰c
water temperature = 5⁰c
surface temperature ( Ts) = 5⁰c
properties of air at 50⁰c and at 1 atm
= 1.092 kg/m^3
Cp = 1007 j/kg⁰c
k = 0.02735 W/m⁰c
Pr = 0.7228
v = 1.798 * 10^-5 m^2/s
determine the exit temperature of air and the rate of heat transfer
attached below is the detailed solution
Calculate the mass flow rate
= p*Ac*Vmean
= 1.092 * 0.0314 * 7 = 0.24 kg/s