18500kg / (2.2.8) × 10 ^ 3kg / M and 179; physics How to express this? How much is it equal to?

18500kg / (2.2.8) × 10 ^ 3kg / M and 179; physics How to express this? How much is it equal to?

This is actually to find the volume v = m / ρ = 7.6 M & # 179;

11*101*10001*100000001=

11*101*10001*100000001=1111111111111111

If the focus f passing through the parabola y2 = 8x is a straight line with an inclination angle of 34 π and intersects the parabola with two points a and B, then | ab | = ()
A. 16B. 162C. 8D. 82

Let a (x1, Y1), (X2, Y2), from x + y − 2 = 0, y2 = 8x, x2-12x + 4 = 0. Then X1 + x2 = 12, x1x2 = 4. So | ab | = 1 + K2 | x1 − x2

The diameter of a cylinder is 9 mm, the height is 8.5 mm, and the weight is 5 g

(radius = 4.5mm = 0.45cm; 8.5mm = 0.85cm)
V = s bottom * height
=π * 0.45 cm * 0.45 cm * 0.85cm
=0.54cm cubic
Density = m divided by V
=5g divided by 0.54cm cube
About 9.26 g / cm cubic

For the fifth grade of primary school in the first semester of the calculation problem, a total of 200. Including: equation, multiplication and division, written calculation, off form calculation,
Today, we will start school tomorrow,

0.1×0.5= 2.8÷7= 100÷0.01= 1.4×3= 0.72÷8= 6÷0.03=0.5×0.6= 40×0.9= 4÷0.5=7×2.1= 8.89+0.1= 24×0.25=0.1÷0.01= 2.4×0.8= 9×0.4= 10×0.01= 30.2-3.02= 4.3-0.25=1-0.82= 9.6÷0.3= 2.6×0.01=0×25....

The primitive function of LNX divided by X

(lnx)'=1/x
So ∫ 1 / xdx = LNX
So ∫ LNX / X DX = ∫ lnxdlnx = (1 / 2) * (LNX) & sup2; + C

The volume ratio of oxygen and nitrogen in the air is 21:78. How many cubic meters of oxygen and nitrogen are there in 660 cubic meters of air?

660 × 2121 + 78 = 660 × 2199 = 140 (cubic meters); 660 × 7821 + 78 = 660 × 7899 = 520 (cubic meters); answer: 660 cubic meters of air contains 140 cubic meters of oxygen and 520 cubic meters of nitrogen

If for any non-zero rational numbers a and B, the operation $is defined as follows: a $B = B / A-2, then what is the value of (- 6) $2? What is the value of (- 6) $2 $1?
$equals circle plus

（-6）$2
=2/(-6)-2
=-1/3-2
=-7/3
（-6）$2$1
=(-7/3)$1
=1/(-7/3)-2
=(-3/7)-2
=-17/7

How to calculate the volume of irregular sphere
What is the volume of this irregular sphere? Is there a special formula to calculate the volume of this sphere?

The formula is v = tabc * 4 / 3
Where t is pi, which is 3.1415926,
A is the semimajor axis of the ellipse, B is the semiminor axis of the ellipse, and C is the distance from the focus of the ellipse to the origin, that is, C ^ 2 = a ^ 2-B ^ 2
Here a = 12, B = 16 / 2 = 8, C = 4, radical 13
So v = 512t, root 13

Niulang and Zhinv are about 2.6 times 10 to the 14th power km away from the astronomical measurement. How many years ago did the earth see the light from vega?

If the speed of light is 3 * 10 ^ 5km / s, the distance of 1 light year is 365 * 24 * 3600 * 3 * 10 ^ 5 = 9.46 * 10 ^ 12km
So: 2.6 * 10 ^ 14 / (9.46 * 10 ^ 12) = 27.48 years