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
KatRina [158]
2 years ago
6

I WILL GIVE BRAINLIEST

Physics
2 answers:
frez [133]2 years ago
3 0
D. Magnet attracting metal.
This is because magnetic forces are non contact forces; they pull or push on objects without touching them.
harina [27]2 years ago
3 0

Answer:

d, magnetic attracting metal, because the force is still going on without the magnet touching metal, and you cant see the force

Explanation:

Hope this helps <33

You might be interested in
What does the left y-axis show?
vivado [14]

Answer:

The correct option is;

a- sea surface temperature anomaly, in degrees Celsius

Explanation:

From the diagram related to the question we have two graphs super imposed of Sea surface temperature anomaly, in degrees Celsius and cholera incidence anomaly (%) both plotted against time in years.

On the left the y-axis represents the sea surface temperature anomaly while on the right, the y-axis represents the cholera incidence anomaly (%).

The display of the graph shows the sea surface temperature anomaly in blue.

6 0
3 years ago
According to the equation for the Balmer line spectrum of hydrogen, a value of n = 3 gives a red spectral line at 656.3 nm, a va
nirvana33 [79]

Answer:

E3 = 3.03 10⁻¹⁶ kJ,  E4 = 4.09 10⁻¹⁶ kJ and  E5 = 4.58 10⁻¹⁶ kJ

Explanation:

They give us some spectral lines of the Balmer series, let's take the opportunity to place the values in SI units

     n = 3        λ = 656.3 nm = 656.3 10⁻⁹ m

     n = 4        λ = 486.1 nm = 486.1 10⁻⁹ m

     n = 5        λ=434.0 nm = 434.0 10⁻⁹ m

Let's use the Planck equation

     E = h f

The speed of light equation

   c = λ f

replace

    E = h c /λ

Where h is the Planck constant that is worth 6.63 10⁻³⁴ J s and c is the speed of light that is worth 3 10⁸ m / s

Let's calculate the energies

     E = 6.63 10⁻³⁴ 3 10⁸ / λ

     E = 19.89 10⁻²⁶ /λ

n = 3

    E3 = 19.89 10⁻²⁶ / 656.3 10⁻⁹

    E3 = 3.03 10⁻¹⁹ J

    1 kJ = 10³ J

    E3 = 3.03 10⁻¹⁶ kJ

n = 4

    E4 = 19.89 10⁻²⁶ /486.1 10⁻⁹

    E4 = 4.09 10⁻¹⁹ J

    E4 = 4.09 10⁻¹⁶ kJ

n = 5

    E5 = 19.89 10⁻²⁶ /434.0 10⁻⁹

    E5 = 4.58 10⁻¹⁹ J

    E5 = 4.58 10⁻¹⁶ kJ

7 0
3 years ago
Westinghouse and Edison fought what was known as the war of the currents. Eventually, Westinghouse triumped using Alternating Cu
DerKrebs [107]
The answer is B! :) Hope it helped
6 0
3 years ago
Read 2 more answers
The potential energy of a body of mass m is given by U(x) = -mgx + 1/2kx^2. The corresponding force is​
jonny [76]

Answer:

 F = (mg - kx)  i ^

Explanation:

Force and potential are related

         F = - (\frac{dU}{dx} i ^ + \frac{dU}{dy} j ^ + \frac{dU}{dz} k ^)

in this exercise we are told that the potential is

         U = - m g x + ½ kx²

let's make the drive

         \frac{dU}{dx} = -mg + kx

         \frac{dU}{dy}= 0

          \frac{dU}{dz} = 0

we substitute

         F = (mg - kx)  i ^

4 0
3 years ago
What is speed in science ???
bazaltina [42]

Answer:

Distance per unit time

Explanation:

Speed is the rate at which someone or something is able to move or operate.

5 0
3 years ago
Other questions:
  • A 0.60-kg object is suspended from the ceiling at the end of a 2.0-m string. When pulled to the side and released, it has a spee
    8·1 answer
  • Which describes the movement of a fluid during convection?
    12·1 answer
  • Three quarterbacks challenged each other to a throwing competition. They want to see who can throw the ball the furthest. What S
    9·1 answer
  • If Roger dropped pages instead of mongoer, you would have would have to wait longer to catch them than when you were catching ma
    14·1 answer
  • In both ionic and molecular bonds, the resulting compound is stabilized because
    10·1 answer
  • In which condition the acceleration of a moving vehicle become zero​
    6·1 answer
  • Help please! Will give brainliest to first correct answer!
    6·1 answer
  • Two iron bolts of equal Mass one at a hundred see another at 55 Sierra place in the insulated cylinder assuming the heat capacit
    11·1 answer
  • Question 13 (1 point)
    15·1 answer
  • I DO NOT WANT LINKES OR …………..
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!