subject

Physics, 09.08.2019 20:20 alisa1600000

Grains of fine california beach sand are approximately spheres with an average radius of 50 μm and are made of silicon dioxide, which has a density of 2.7 × 103 kg/m3. what mass of sand grains would have a total surface area (the total area of all the individual spheres) equal to the surface area of a cube 0.8 m on an edge?

ansver

Answers: 3

Show answers

Another question on Physics

question

Physics, 21.06.2019 20:20

Aplanet of mass m 6.75 x 1024 kg is orbiting in a circular path a star of mass m 2.75 x 1029 kg. the radius of the orbit is r 8.05 x107 km. what is the orbital period (in earth days) of the planet tplanet?

Answers: 1

question

Physics, 22.06.2019 12:10

Energy flows from the producer level to the level. is called

Answers: 1

question

Physics, 22.06.2019 18:30

Asmall grinding wheel has a moment of inertia of 4.0×10−5 kg⋅m2 . what net torque must be applied to the wheel for its angular acceleration to be 150 rad/s2 ?

Answers: 3

question

Physics, 23.06.2019 01:00

Thermal radiation gets its name because

Answers: 2

You know the right answer?

Grains of fine california beach sand are approximately spheres with an average radius of 50 μm and a...

Questions

question

Physics, 03.07.2019 02:40

Hockey puck b rests on a smooth ice surface and is struck by a second puck a, which has the same mass. puck a is initially traveling at 16.0 m/s and i...

question

Physics, 03.07.2019 02:40

Because the centripetal force is provided by spring for this apparatus, the centripetal force at a given distance r is fixed by the spring constant of...

question

Physics, 03.07.2019 02:40

Water at 0°c loses 1140 calories worth of heat. how much of the water freezes? [lf= 79.7 cal/g] a) 16.8 g b) 81.5 g c) 0.002 g d) 14.3 g e) 51.0 g...

question

Physics, 03.07.2019 02:40

Show that the fermi energy for nonrelativistic electrons (treated as if they do not interact with each other) confined in the two-dimensional square b...

question

Physics, 03.07.2019 02:40

Imagine a piece of conducting wire with qurrent i and eross section a and a negative oharge q at a distance of r from the center of the wire. now ugin...

question

Physics, 03.07.2019 02:40

The radioactive isotope technetium-99 in an excited state ( 9943tcm or tc-99m) can be used in medicine to determine a patient's blood volume. tc-99m e...

question

Mathematics, 03.07.2019 02:40

Consider the following equation. -2x + 6 = -(2/3)^x+5 approximate the solution to the equation above using three iterations of successive...

question

Physics, 03.07.2019 02:40

A(n) uses combustion to transfer thermal energy to warm a building....

question

Mathematics, 03.07.2019 02:40

Na bag there are two $20 bills, one $10 bill, four $5 bills, and three $1 bills. if frank picks one bill from the bag, the expected value of the bill...

question

Mathematics, 03.07.2019 02:40

if lp = 15 and pr = 9, find lr. explain....

question

Health, 03.07.2019 02:40

A27-year-old female client, who weighs 130 lb, claims to be able to lift 85 lb for 10 repetitions on the bench but only completes 6 repetitions. using...

question

English, 03.07.2019 02:40

According to rudyard kipling, what is the white man's burden? a. to create cultural diversity b. to suppress violent practice...

question

Health, 03.07.2019 02:40

Which pregnancy complication cannot be treated with regular prenatal care ? headaches excessive weight gain high blood pressure

question

Mathematics, 03.07.2019 02:40

Cory earns 52.50 in 7 hours. find the unit rate...

question

Mathematics, 03.07.2019 02:40

Cory earns 52.50 in 7 hours. find the unit rate...

question

Mathematics, 03.07.2019 02:50

Cory earns 52.50 in 7 hours. find the unit rate...

question

English, 03.07.2019 02:50

What do we learn about odysseus as a man throughout his journey in the cyclops...

question

English, 03.07.2019 02:50

What is the central idea of lewis’s speech? why might he have chosen to express this idea at a princeton graduation ceremony?...

question

English, 03.07.2019 02:50

Which careers require a person to be confident when speaking in front of audiences? the performing arts and broadcast journalism broadcast journalism...

question

Mathematics, 03.07.2019 02:50

Class size freshman 2200 sophomore 1800 junior 1400 senior 1100 heidi is doing a study for her statistics class, and she needs to obtain a random samp...

More questions: Physics Another questions