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
Vadim26 [7]
3 years ago
15

Reading glasses use what property of light waves

Physics
1 answer:
tresset_1 [31]3 years ago
5 0
Visible range of electromagnetic radiation
You might be interested in
a nonrelativistic proton is confined to a length of 2.0 pm on the x-axis. what is the kinetic energy of the proton if its speed
Elina [12.6K]

Answer:

K = 1.29eV

Explanation:

In order to calculate the kinetic energy of the proton you first take into account the uncertainty principle, which is given by:

\Delta x \Delta p\geq \frac{h}{4\pi}      (1)

Δx : uncertainty of position = 2.0pm = 2.0*10^-12m

Δp: uncertainty of momentum = ?

h: Planck's constant = 6.626*10^-34 J.s

You calculate the minimum possible value of Δp from the equation (1):

\Delta p=\frac{h}{4\pi \Delta x}=\frac{6.626*10^{-34}J.s}{4\pi(2.0*10^{-12}m)}\\\\\Delta p=2.63*10^{-23}kg.\frac{m}{s}

The minimum kinetic energy is calculated by using the following formula:

k=\frac{(\Delta p)^2}{2m}       (2)

m: mass of the proton = 1.67*10^{-27}kg

k=\frac{(2.63*10^{-23}kgm/s)^2}{2(1.67*10^{-27}kg)}=2.08*10^{-19}J

in eV you have:

2.08*10^{-19}J*\frac{6.242*10^{18}eV}{1J}=1.29eV

The kinetic energy of the proton is 1.29eV

7 0
3 years ago
The magnetic field of a bar magnet is the strongest ___.
AnnyKZ [126]
B) at the poles of the magnet
5 0
3 years ago
Read 2 more answers
In the early universe and in stars, deuterium nuclei are produced from the combination of one proton and one neutron, with the r
poizon [28]

Answer:

Q = q_e = 1.6 \times 10^{-19} C

Explanation:

As we know that charge is always conserved

so here we have

initial total charge = final total charge

also we know that gamma rays are chargeless and massless particles

so we have

charge on deuterium is given as

Q = charge on proton + charge on neutron - charge on gamma

so we have

Q = 1.6 \times 10^{-19}

Q = q_e = 1.6 \times 10^{-19} C

6 0
3 years ago
At what time of day would you expect the New Moon to rise?
abruzzese [7]

Answer:

At what time of day would you expect the New Moon to rise?

A) Midnight

B) Sunset

C) Noon

D) Sunrise

An HR diagram is a plot of:

A) Luminosity versus apparent magnitude.

B) Absolute magnitude versus luminosity.

C) Absolute magnitude versus surface temperature.

D)Apparent magnitude versus color index.

E) Color index versus surface temperature.

What is the most easily visible manifestation of the Earth's magnetic field?

A) The Van Allen radiation belts

B) The magnetopause

C) The aurorae

D) There is no easily visible manifestation of the Earth's magnetic field.

For a lunar eclipse (the moon is obscured from view), which phase is necessary?

A) third quarter

B) new moon

C) first quarter

D) full moon

4 0
3 years ago
A ball is launched from a slingshot. As the ball travels along its trajectory, what force(s) are acting on it? Select all that a
ZanzabumX [31]

Force of air and gravitational force are acting on the ball when launched from the slingshot.

When a ball is launched from a slingshot, during its travel force of air as well as gravitational force are acting on the ball because there is air which moves opposite to the motion of a ball whereas the force of gravity attracts the ball downward.

The force of air slows down the motion of the ball while on the other hand, the force of gravity brings the ball to the ground due to attraction. If these two forces are not present then the ball continues its motion forever so we can conclude that force of air and force of gravity are acting on the ball when launched from the slingshot.

Learn more: brainly.com/question/25533186

4 0
3 years ago
Other questions:
  • The radius of a niobium atom is 131 pm. how many niobium atoms would have to be laid side by side to span a distance of 2.40 mm
    12·1 answer
  • N asteroid of mass 58,000 kg carrying a negative charge of 15 μc is 180 m from a second asteroid of mass 52,000 kg carrying a ne
    5·2 answers
  • What two units of measurement are necessary for describing speed
    8·1 answer
  • A 35-N bucket of water is lifted vertically 3.0m and then returned to its original position. How much work did gravity do on the
    12·1 answer
  • A scientific hypothesis can be disproved with
    9·1 answer
  • GPS consists of three segments what are they?
    14·1 answer
  • Compare the motions of transverse, longitudinal, and combined waves.
    5·1 answer
  • Cual es la energía cinética de un objeto cuya masa es de 2kg y se mueve a una velocidad de 5 m/s2 * a)10 J b)25 J c)50J d)98J
    12·1 answer
  • Please help<br>What is the angle of the reflected ray in the diagram above?​
    11·1 answer
  • The line drawn connecting the crests of several waves and perpendicular to the direction of wave motion is the _____.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!