4. The mass of the Earth is 5.98 x 1024 kg. The average radius of the Earth is 6,370,000 meters. Assuming the Earth is a perfect sphere, what is the average density of the Earth? (The volume of a sphere is V =-r*) [work] p= [answer] kg/m3

Please help. This problem involves finding the radius and volume of a platinum atom using its density. Thank you.

1. Multiplication or division: keep the same number of significant figures in the product or quotient as is in the least precise factor. Examples: 3.1 * 25.6=79.360000... = 79 6.7/981.0=0.0068297655... = 0.0068 keep only 2 significant digits 2. Powers or roots: keep the same number of significant figures as in the original number. Example: Sqrt(38) 6.164414... keep only 2 significant digits = 6.2 (11.6)² = 134.5600000... = 135 Exercises 3. Addition or subtraction: Round off, to the number of decimal places determined by the number with the least number of places beyond the decimal point. Example: 31.5+24.61 +3.28+1.19 +0.762 +0.003 = 61.345 1. 3.9 * 78.9= = 61.3 (correct result) 2. 32.01 +96.321 +36.98 +0.00023 +28.9= 3. 26.9/98 = 4. 421 0.003 =

12. Find o (in degrees). y hip (1.1, 0.8) knee (1.35, 0.51) ankle (1.21 0.15) (0, 0)! X Copyrighte 2015 Woltes Kluner - All Rights Reserved

1.What is physical quantity? A car is moving with the velocity of 30 mihr¹. Convert this value to FPS unit system. Write the following quantities in powers of ten. (a) 5 nF (b) 9 GB

A farmer wants to fence off his four-sided plot of flat land.He measures the first three sides, shown as A, B, and C, and then correctly calculates the length andorientation of the fourth side D . What is his result?

Not you? Switch account * Required 9. multiplication (1x10^3) x (3x10^1) 3,000 O 30,000 O 300,000 30 6.3050 mm to kilometers* 305000000

i keep getting the unit conversion chain incorrect but i swear i’m song it correct i don’t understanddd:(

the average density of an atom is approximately 103 kg/m3. The nucleus of an atom has a radius about 10-5 times that of the entire atom, and contains nearly all the mass of the atom.  What is the approximate density, in kilograms per cubic meter, of a nucleus?

Evaluate the commutator[L,,L, ·L,]. 2, L,]. -L. (a) h’L, (b) 0 (c) h’I, (d) h°L.