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
Daniel [21]
3 years ago
10

Because quantum mechanics is physics that describes the interactions of very small objects (i.e. molecules, atoms, and electrons

), this week you will need to know how to multiply very small numbers. Remember that scientific notation writes very small or large number in terms of powers of 10. For example, .0008 can be written in scientific notation as 8 x 10-4 or as 8E-4. The power of 10 (-4 in this case) tells you to take the number 8.0 and move the decimal 4 places to the left giving us .0008. Which is a correct representation of .000025 in scientific notation?
Physics
2 answers:
stira [4]3 years ago
5 0
Ha! Lot of words but the question itself is easy.
The answer is 2.5 times 10 to the 5th power.
The main part of the numbers has the decimal point placed after the first digit.
Then for what number of power, you just count the number of decimal places moved.
I hope this helps you.
anygoal [31]3 years ago
4 0

Explanation :

Scientific notation writes very small or large number in terms of powers of 10. Quantum mechanics is the branch of physics in which we deal with the interactions of very small objects (i.e. molecules, atoms, and electrons).

For this we need to know how to multiply very small numbers.

For example, 0.0008 can be written in scientific notation as 8\times 10^{-4}. Here, the power of 10 (-4 in this case) tells us to take the number 8.0 and move the decimal 4 places to the left giving us 0.0008.

0.000025 can be written in scientific notation as 2.5\times 10^{-5}.

Hence, this is the required solution.

You might be interested in
An object is moving in a circle. If the radius of the object is doubled, and the period remains constant, the magnitude of the v
Anton [14]

Answer:

Twice

Explanation:

From the formula for velocity in a circle

V= 2πr/T

Where V is velocity

r is raduis

T is period

We see that as r increases V increases so if r is doubled V becomes doubled

4 0
3 years ago
Make a rough estimate of the number of quanta emitted in one second by a 100 W light bulb. Assume that the typical wavelength em
mixas84 [53]

Answer:

#_photon = 5 10²⁰ photons / s

Explanation:

For this exercise let's calculate the energy of a single quantum of energy, use Planck's law

         E = h f

         c= λ f

         E = h c / λ

          λ= 1000 nm (1 m / 109 nm) = 1000 10⁻⁹ m

Let's calculate

          E₀ = 6.6310⁻³⁴ 3 10⁸/1000 10⁻⁹

          E₀ = 19.89 10⁻²⁰ J

This is the energy emitted by a photon let's use a proportions rule to find the number emitted in P = 100 w

                #_photon = P / E₀

               #_photon = 100 / 19.89 10⁻²⁰

              #_photon = 5 10²⁰ photons / s

6 0
3 years ago
a 10 kilogram steel ball is dropped from the top of a tower 100 meters high the kinetic energy of the ball just before it sttike
EleoNora [17]

Explanation:

If we assume negligible air resistance and heat loss, we can assume that all of the Gravitational potential energy of the ball will turn into Kinetic energy as it falls toward the ground.

Therefore our Kinetic energy = mgh = (10kg)(9.81N/kg)(100m) = 9,810J.

4 0
3 years ago
Why is the crank on a meat grinder larger than the crank on a pencil
MArishka [77]
It takes more work to use a meat grinder
4 0
3 years ago
Read 2 more answers
A 32-n force acts on a small mass in the positive x-direction. a 26-n force also acts on it in the negative x-direction. what is
motikmotik

Equilibrium force is the force that will keep the small mass in place, hence no movement must be made. So we know that 32 N of force is acted towards the positive direction so +32 N. Which is counteracted by 26 N force so:

32 N – 26 N = 6 N (positive)

Since positive 6 is left, therefore this must be acted by an equilibrant negative 6 N.

 

Answer:

<span>- 6 N </span>

6 0
3 years ago
Other questions:
  • A millionairess was told in 1992 that she had exactly 15 years to live. However, if she immediately takes off, travels away from
    5·1 answer
  • What is the force exerted on a moving charge of -2.0 C at a 20° angle through a magnetic field of 3.0 x 10-4T with a
    10·1 answer
  • A motorcycle drives up a steeply inclined ramp. The work done on the motorcycle by the earth’s gravitational force is ____.
    5·2 answers
  • How long does it take for light from the sun to reach earth
    11·2 answers
  • the pitch that the average human can hear has a frequency of 20.0. If sound with this frequency travels through air with the spe
    15·1 answer
  • The first part of the brain to be stimulated and affected by alcohol is the
    9·1 answer
  • in the absences of friction, gravity, and all other external forces, what kind of speed will an object display if it’s travel fr
    14·1 answer
  • Provide one example of this law during a physical change.
    15·1 answer
  • #1- How much Magnesium is consumed in this reaction? *input # only.
    11·1 answer
  • A pebble is dropped from rest from the top of a tall cliff and falls 53.4 m after 3.3 s has elapsed. How much farther does it dr
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!