1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
dezoksy [38]
2 years ago
12

Gold, which has a density of 19.32 g/cm3, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long

fiber. (a) If a sample of gold with a mass of 6.740 g, is pressed into a leaf of 6.036 μm thickness, what is the area of the leaf? (b) If, instead, the gold is drawn out into a cylindrical fiber of radius 2.100 μm, what is the length of the fiber?​
Physics
1 answer:
NNADVOKAT [17]2 years ago
3 0

Answer:

a) 578.0 cm²

b) 25.18 km

Explanation:

We're given the density and mass, so first calculate the volume.

D = M / V

V = M / D

V = (6.740 g) / (19.32 g/cm³)

V = 0.3489 cm³

a) The volume of any uniform flat shape (prism) is the area of the base times the thickness.

V = Ah

A = V / h

A = (0.3489 cm³) / (6.036×10⁻⁴ cm)

A = 578.0 cm²

b) The volume of a cylinder is pi times the square of the radius times the length.

V = πr²h

h = V / (πr²)

h = (0.3489 cm³) / (π (2.100×10⁻⁴ cm)²)

h = 2.518×10⁶ cm

h = 25.18 km

You might be interested in
Young's experiment is performed with light of wavelength 502 nm from excited helium atoms. Fringes are measured carefully on a s
PSYCHO15rus [73]

Answer:

Explanation:

wave length of light λ = 502 nm

screen distance D = 1.2 m

width of one fringe = 10.2 mm / 20

= .51 mm

fringe width = λ D / a  , a is separation of slits

Puting the values given

.51 x 10⁻³ =  502 x 10⁻⁹ x 1.2 / a

a = 502 x 10⁻⁹ x 1.2 / .51 x 10⁻³

= 1181.17 x 10⁻⁶ m

1.18 x 10⁻³ m

= 1.18 mm .

8 0
2 years ago
ANSWER QUICK 30 POINTS
Lelu [443]
What do you need help on
4 0
2 years ago
Jenny pushes a 40 N crate down the hall 2m. How much work did she do?
Shalnov [3]
Work done = force x distance = 40 x 2 = 80 Joules.
8 0
2 years ago
How many significant digits should the answer to the following problem have? (2.49303 g) * (2.59 g) / (7.492 g) =
Feliz [49]

The number of significant digits to the answer of the following problem is four.

<h3>What are the significant digits?</h3>

The number of digits rounded to the approximate integer values are called the significant digits.

The following problem is

(2.49303 g) * (2.59 g) / (7.492 g) =

On solving we get

= 0.86184566204

The answer is approximated to  0.86185

Thus, the significant digits must be four.

Learn more about significant digits.

brainly.com/question/1658998

#SPJ1

6 0
2 years ago
Need a little help here :(
Goshia [24]

Answer:

The output out be 200

Explanation:

Hope this helps :))

8 0
3 years ago
Read 2 more answers
Other questions:
  • Determine the length of a wind instrument, assuming that it is modeled as a closed tube and that the lowest sound that it can pl
    10·1 answer
  • What is the difference between an elastic and inelastic collision
    7·1 answer
  • A bookshelf is at rest in a room. a force of 35.0 newtons is applied to a bookshelf. if the floor imparts a frictional force of
    8·2 answers
  • An external force of 5N is applied to a go-kart that is opposite it’s direction of travel for 5 seconds. What is the resulting m
    14·1 answer
  • Joan makes the device shown in her science class. What would happen to the magnetic field if she connects the battery in the opp
    15·2 answers
  • If gravity on mars is less that that of earth so you weigh more or less on mars
    11·2 answers
  • 2,000 kg car moving at 5 m/sec to east collides with 6,000 kg car moving 3 m/sec to west. If cars couple together, what is their
    10·1 answer
  • A camera lens used for taking close-up photographs has a focal length of 22.0 mm. The farthest it can be placed from the film is
    15·1 answer
  • The total charge a battery can supply is rated in mA⋅hmA⋅h, the product of the current (in mA) and the time (in h) that the batt
    9·1 answer
  • if an object moves from a position of x = 12 m to x = 124 m, then back to x = 98 m. If the time it takes to complete this motion
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!