Express the answer in standard scientific notation with the appropriate number of significant figures. a. The mass of a blue whale, 180000 kg. ____ x10 ^___kg b.  The diameter of a helium nucleus, 0.000 000 000 000 003 8 m. ____ x10 ^___m

the shell is thin, but has a definite thickness.  Calculate the (volume) density of the shell, in g/cm3.  Here are the numbers: R = 28 cm M = 800 grams thickness = 0.3 mm

A light metal rod has a mass of 0.610 oz/in of rod length. How many meters of rod length are needed to have a mass of 10.9 lbs? Assume that the rod has a constant diameter. Use 1 in = 2.54 cm in your calculations.

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

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?

The mass of the cube is 12 grams. Calculate the density of the cube using the length measurement values read from the micrometer. Length: 1.05 mm Width: 1.25 mm Height: 0.95 mm width length A. 8.2 g/cm3 B. 13.4 g/cm? C. 9.6 g/cm3 D. 8.4 g/cm3 E. 10.1 g/cm3 height

The shell is thin, but has a definite thickness.  Calculate the (volume) density of the shell, in g/cm3.  Here are the numbers: R = 13 cm M = 800 grams thickness = 0.3 mm

The mass of fuel in an airplane must be determined before takeoff. A jet contains 11281 LL of fuel after it has been filled with fuel. What is the mass of the fuel in kilograms if the fuel’s density is 0.767 g/cm3?

The Statue of Liberty in New York City is approximately 305 ft305 ft tall. How many U.S. dimes would be in a stack of the same height? Each dime is 1.35 mm1.35 mm thick. number of dimes:     Each dime has a mass of 2.268 g.2.268 g. How much would the stack of dimes from the previous question weigh? mass:   g What is the value, in dollars, of the same stack of dimes? value:   dollars The 2017 U.S. gross domestic product (GDP) was valued at 19,390,604,000 dollars.19,390,604,000 dollars. How many Statue of Liberty‑height stacks of dimes are needed to match the GDP in value? number of stacks:

A group of students wish to determine, experimentally, the bulk density of an unknown metal. To determine this amount, the students measured the diameter, height, and mass of various cones. These values appear in Table 1. Determine: a) The volume of the cones and place them in table # 1. Table 1 Cones Height(cm) Diameter(cm) Volume(cm) Mass(g) 1 5 565 10 5 1295 15 1685 4 20 2160 5 25 2860 30 3505 7 35 3980 8. 40 4675 b) Using the graphical method, determine the density of the material. c) Make a prediction of the mass of a sphere that has a radius of 75 cm and is made of the same unknown material as the cones in the previous problem. 6. 00