An element makes up 0.0021% of the Earth's continental crust by mass. Express this in ppm (parts per million), to an appropriate number of significant figures

Q: A sphere of radius r has surface area A = 4πr2 and volumeV = (4/3)πr3. If the radius of sphere 2 is…

A: a)The ratio of the areas, A2/A1

Q: (a) A pyramid has a height of 461 ft and its base covers an area of 12.0 acres (see figure below).…

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Q: the A partly-full paint can has 0.493 U.S. gallons of paint left in it. (a) What is the volume of…

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Q: Water has a density of 1.00 Mg/m3. What is the density expressed in imperial units? Express your…

A: To convert the density of water from metric units (Mg/m^3) to imperial units (slugs/ft^3), you can…

Q: A builder wants to install wall-to-wall carpeting in a living room of length 8.84 m and width 6.2 m.…

A:

Q: One mole of atoms consists of 6.02 × 1023 individual atoms. If one mole of unicorn atoms were spread…

A: Determine the surface area.

Q: Suppose 1.5 cubic meter of oil is spilled into the ocean. Find the area of the resulting slick,…

A: Finding the total area occupied by the spilled oil.Given information:The volume of the oil spilled…

Q: An object with a mass of 61.0 g displaces 785.0 ml of water when it is completely immersed. What is…

A: Mass = 61  Volume = 785 mL Fbuoyant = Fb = rho*V*g = 10^-3*785*9.8 = 7.693 N

Q: The diameter of the spherical particle is (1.900x10^O) fm, and the mass is (2.51x10^-27) kg.…

A: Formula of density is as follow; ρ=mV…

Q: The micrometer (1 µm) is often called the micron. (a) How many microns make up 4.0 km? | um (b) What…

A: Given 1μm=10-6 m

Q: How many significant digits are in the exact number 155?

A: Given: The number is 155.

Q: Where r is the radius of the sphere and pi = 3.14. If you measure the radius of a bowling ball to be…

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Q: Iron has a mass of 7.87 g per cubic centimeter of volume, and the mass of an iron atom is 9.27 ×…

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Q: Q6: Suppose your hair grows at the rate 1/32 in per day. What is the rate at which it grows in…

A: Given Hair grows at a rate r=132 in/day   We have to convert the rate in nm/s1 d=86400 s

Q: A partly-full paint can has 0.711 U.S. gallons of paint left in it. (a) What is the volume of the…

A: Volume of paint = 0.711 US gallons

Q: (1) A typical bacterium has a mass of 1 picogram (1 × 10-¹2 gram). Calculate the mass of a mole (or…

A: Mass of bacterium m= 10^-12gm.

Q: A model for the surface area of some solid object is given by S = 0.141w0.797 0.466, where w is the…

A:

Q: You measure the mass of your phone to be 161 grams, but the manufacturer's website lists it as 163.9…

A: Given data:  Actual mass (m) = 161 g Expected mass (m') = 163.9 g Required:  The percentage error

Q: Express this product in units of km3 in standard scientific notation and with the appropriate number…

A: given that (4.2 km) × (4.0 m) × (13.24 × 10−3 mm)

Q: You've been asked to calculate the mass of a conical pile of sawdust measuring 10 meters high with a…

A: Solution:-        We are given with height of a conical pile of…

Q: builder wants to install wall-to-wall carpeting in a living room of length 8.81 m and width 6.3 m.…

A: Given: Length of the room,  L=8.81 m Breadth of the room, b=6.3 m

Q: Sales delay is the elapsed time between the manufacture of a product and its sale. According an…

A: Dear student, As per guidelines, I can only first 3 subparts. Please repost other parts in next…

Q: The number of significant figures of the number 6.92 E-3 mm, is: A)2 B)4 C)1 D)3

A:

Q: The signboard truss is designed to support a horizontal wind load of 900 lb. If the resultant of…

A: Given The signboard truss is designed to support a horizontal wind load of 900 lb. If the resultant…

Q: A lecture period (50.0 min) is close to 1.00 microcentury. (a) How long is a microcentury? (b) Usin…

A: (a)we know that,minutes in 1 century=52.6×106 minutesminutes in 1 micro century= 52.6 minutes

Q: The length and width of a rectangular room are measured to be 3.885 ± 0.0065 m and 3.2 ± 0.0045 m.…

A: Given The length of a rectangular room = l = 3.885 ± 0.0065 m The width a rectangular room = b = 3.2…

Q: Assume it takes 7.45 minutes to fill a 20.0 gal gasoline tank. (1 U.S. gal = 231 in.3) (a)…

A: a) Given t= 7.45 mins = 7.45*60 sec              Given the tank is of 20 gallons capacity…

Q: A rectangular block of iron was found to be 19.00 cm wide, 0.31500 m high, and 720.026 mm deep.…

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Q: In the calculation of the perimeter of a square measuring: 5.0 cm ± .05 cm by 5.0 cm ± .05 cm, What…

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Q: The radius of sphere 2 is triple the radius of sphere 1. What is the ratio of the areas, A2/A1?

A: Let us use subscript 1 for smaller sphere and subscript 2 for largersphere .Then , according to…

Q: The sum of the numbers 436.32, 227.2 and 0.301 in appropriate significant figures is (a) 663.821 (b)…

A: Adding the givens, Sum=436.32+227.2+0.301        =663.821

Q: Each of the following equations was given by a student during an examination 1/2 mv^2=1/2…

A: 1) The equation is given as, Here, v0 and v denotes the initial and the final velocity, g denotes…

Q: The length and width of a rectangular room are measured to be 3.885 ± 0.0065 m and 3.2 ± 0.0045 m.…

A: Please see the answer