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
Ivan
3 years ago
13

An aluminum sheet is compressed to a thickness of 2.0 microns. If each cubic centimeter of aluminum has a mass of 2.70 g, what i

s the mass of an aluminum sheet, in grams, if its total surface area is 5 m2
Physics
1 answer:
Nezavi [6.7K]3 years ago
6 0
We need to find the volume V of the sheet of aluminum that has a thickness t of t=2 micrometers and that is equal to t= 2*10^6 m and area A = 5 m². Volume V is:

V=A*t= 5*2*10^-6 = 1*10^-5 m³. 

Now we need to find the volume V in cm³:

1 m³ = 1 000 000 cm³ so 10^-5 m³ = 10 cm³. 

If 1 cm³ has a mass of 2.70 g then 10 cm³ has a mass of 27.0 grams.

So the correct answer is the mass of the aluminum sheet is m= 27 g or m=0.027 kg. 
You might be interested in
An average human weighs about 600 N
NemiM [27]

Answer:

The distance between them, x = 5809.47 m

Explanation:

Given,

The average weight of a human, w = 600 N

The charge carried by the humans, q = 1.5 C

If 600 N of force acts between two opposite charges, the distance between the charges can be derived from the Coulomb's laws of force,

                          <em>F=\frac{1}{4\pi\epsilon_{0}}\frac{qq}{x^{2}}</em>

Where,

                         \frac{1}{4\pi\epsilon_{0}} = 9 x 10⁹ N m² C⁻²

Therefore

                          x² = 9 x 10⁹ X 1.5² / 600

                              = 33750000

                           x = 5809.46 m

Hence, the distance between the humans should be, x = 5809.47 m

4 0
3 years ago
Refer to the diagram. Which answer correctly labels the water between the equator and the North Pole?
Korolek [52]
B.---A. warm water B. thermocline C. cold water
5 0
3 years ago
Someone drops a brick on a 2.6 kg cart moving at 28.2 cm/s. After the collision, the dropped brick and cart are moving together
Softa [21]

Answer:

2.087 kg

Explanation:

From the law of conservation of momentum,

Total momentum before collision = total momentum after collision.

MU + mu = V(M+m)............................ Equation 1

Where M = mass of  the cart, m = mass of the brick, U = initial velocity of the cart, u = initial velocity of the brick, V = velocity of both cart and brick after collision.

Note: The initial velocity of the brick is zero Thus mu = 0

making m the subject of the equation,

m =(MU/V)-M ........................................ Equation 2

Given: M = 2.6 kg, U = 28.2 cm/s = 0.283 m/s, V = 15.7 cm/s = 0.157 m/s.

Substituting into equation 2,

m = (2.6×0.283/0.157)-2.6

m = 2.087 kg

Thus the mass of the brick = 2.087 kg

5 0
3 years ago
Suppose you want to operate an ideal refrigerator with a cold temperature of − 15.5 °C , and you would like it to have a coeffic
tensa zangetsu [6.8K]

Answer:

15.65 °C

Explanation:

cold temperature (Tc) = -15.5 degree C = 273.15 - 15.5 = 257.65 kelvin

minimum coefficient of performance (η) = 8.25

find the maximum hot reservoir temperature of such a generator (Th)

η = \frac{Tc}{Th-Tc}

Th = Tc x (\frac{1}{η} + 1)

Th = 257.65 x (\frac{1}{8.25} + 1)

Th = 288.8 K

Th = 288.8 - 273.15 = 15.65 °C

8 0
3 years ago
9. A 0.500 kg ball with a speed of 4.0 m/s strikes a stationary 1.0 kg target. The ball and target
Virty [35]

Answer:

D. 2.0 kg m/s

Explanation:

Momentum after = momentum before

p = (0.500 kg) (4.0 m/s) + (1.0 kg) (0 m/s)

p = 2.0 kg m/s

4 0
3 years ago
Other questions:
  • A displacement vector has a magnitude of 810 m and points at an angle of 18° above the positive x axis. what are the x and y sca
    14·1 answer
  • Mercury is in the 80th position in the periodic table. How many protons does it have?
    11·2 answers
  • The separation between two magnets is reduced by a factor of 5. How does the force between them change?
    6·1 answer
  • Every object in the universe exerts a force on every other object. This force is called
    8·1 answer
  • What happens to a decimal place in the number when you are converting from a smaller metric unit to a larger unit?
    11·1 answer
  • A force of 6.0 N gives a 2.0 kg block an acceleration of 3.0
    10·1 answer
  • An apple weighs 1.00 N. When you hang it from the end of a long spring of force constant 1.50 N/m and negligible mass, it bounce
    6·1 answer
  • Two students are watching a person riding a skateboard up and down a ramp. Each student shares what they think about the energy
    9·1 answer
  • Donna is leaming about the water cycle in school. She knows that runoff is water that flows over land surfaces,
    15·1 answer
  • What is measurement ?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!