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
lys-0071 [83]
3 years ago
13

Trains A and B travel on parallel tracks. Train A has a speed of 40km/h and is slowing at the rate of 2m/s2, while train B has a

constant speed of 40km/h. Determine the velocity and acceleration of train B relative to train A .
Physics
1 answer:
RSB [31]3 years ago
6 0
I don’t know what the answer is but I will take points LOL thank God
You might be interested in
Are stars really planets?
Tems11 [23]
Stars are not really planets because they are far, far away from our solar system.
Hope this is helpful~
8 0
3 years ago
Read 2 more answers
A bob of mass of 0.18 kilograms is released from a height of 45 meters above the ground level. What is the value of the kinetic
il63 [147K]
I think the best answer is b 
4 0
4 years ago
Read 2 more answers
78. A film of oil on water will appear dark when it is very thin, because the path length difference becomes small compared with
Hoochie [10]

To solve this problem it is necessary to apply the concepts related to the condition of path difference for destructive interference between the two reflected waves from the top and bottom of a surface.

Mathematically this expression can be described under the equation

\delta = 2nt

Where

n = Refractive index

t = Thickness

In terms of the wavelength the path difference of the reflected waves can be described as

\delta = \frac{\lambda}{4}

Where

\lambda = Wavelenght

Equation the two equations we have that

2nt = \frac{\lambda}{4}

t = \frac{\lambda}{8n}

Our values are given as

\lambda = 380nm \rightarrow Wavelength of light

n = 1.4

t = \frac{380nm}{8*1.4}

t = 33.93nm

Therefore the minimum thickness of the oil for destructive interference to occur is approximately 34.0 nm

4 0
3 years ago
What is the direction of the electric force exerted by paperclip 1 on paperclip 2?
Tema [17]
In general, the electric force in an electric field is exerted outward from a positive atom, and inward for the negative atom. Therefore based on the figure you specified, we can say that the <span>electric force exerted by paperclip 1 on paperclip 2 is repulsive.</span>
6 0
4 years ago
Which variable is directly proportional to frequency?
zhuklara [117]

For this case we have by definition:

v = λf

We observe that we have a linear relationship, where λ is the constant of proportionality.

We have then:

  • <em>v: speed of propagation of the wave </em>
  • <em>λ: wavelength </em>
  • <em>f: frequency </em>

Answer:

The variable that is directly proportional to the frequency is λ, the wavelength.

4 0
4 years ago
Read 2 more answers
Other questions:
  • An insect 5.25 mm tall is placed 25.0 cm to the left of a thin planoconvex lens. The left surface of this lens is flat, the righ
    14·1 answer
  • Sunspots are _______ and _________ than the gases surrounding them.
    12·2 answers
  • Two bowling balls are rolling toward each other. One of the balls, ball A, is 12 kg traveling to the right at a velocity of 3 m/
    7·1 answer
  • Describe technologies used to explore the universe using electromagnetic radiation
    5·1 answer
  • All points to the_________of zero on a horizontal number line are negative.
    10·2 answers
  • What is the independent variable and why?
    8·2 answers
  • Atom is of
    5·1 answer
  • a coffee filter is falling towards the ground at a constant speed. of the forces listed, identify which act upon the coffee filt
    11·1 answer
  • A rectangular copper strip 1.5cm wide and 0.10cn thick carries a current of 5.0A. Find the Hall voltage for a 1.2T magnetic fiel
    12·1 answer
  • Question 4
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!