All categories

2 years ago

If two cars A and B are moving with velocity 60 km/hr and 80 km/hr

Physics

1 answer:

Vitek1552 [10]2 years ago

3 0

Answer:

VAB = 20km/hr

Explanation:

<u>Given the following data;</u>

Velocity of car A, VA = 60km/hr

Velocity of car B, VB = 80km/hr

To find the relative velocity of B w.r.t A, VAB;

Since the two cars are moving in the same direction, we have;

VAB = VB - VA

Substituting into the equation, we have;

VAB = 80 - 60

Therefore, the relative velocity of car B with respect to car A is 20 kilometers per hour.

You might be interested in

A ladybug sits 10.8 cm from the center of a beatles music album spinning at 33.33 rpm. What is the maximum velocity (in m/s) of

snow_lady [41]

Answer:

The maximum velocity is 0.377 m/s

Explanation:

Please, the solution is in the Word file attached

Download docx

7 0

2 years ago

Read 2 more answers

Two parallel slits are illuminated by light composed of two wavelengths. One wavelength is λA = 622nm. The other wavelength is λ

Sergio039 [100]

Answer:

$\lambda_{B}=414.67 nm$

Explanation:

In this question we have given

$\lambda_{A}=622nm$

we have to find

$\lambda_{B}=?$

We know that

optical path difference for bright fringe is given as $=n\lambda$

Here,

n is order of fringe

and optical path difference for dark fringe is given as $=(n+.5)\lambda$

since the light with wavelength $\lambda_{A}$ produces its third-order bright fringe at the same place where the light with wavelength $\lambda_{B}$ produces its fourth dark fringe

it means

optical path difference for 3rd order bright fringe= optical path difference for forth order dark fringe

Therefore,

$3\lambda_{A}=(4+.5)\lambda_{B}$ ...............(1)

Put value of $\lambda_{A}$ in equation (1)

$3 \times 622=(4+.5)\lambda_{B}$

$1866=4.5\lambda_{B}$

$\lambda_{B}=414.67 nm$

3 0

2 years ago

What is the primary visible color of an emission nebula?

zzz [600]

In emission nebulae, there are interstellar clouds of hydrogen, which glow red because of the intense radiation of hot stars inside the nebula

7 0

3 years ago

The wave property which is independent of all other properties is

Anna71 [15]

The wave property which is independent of all other properties is THE VELOCITY OF A WAVE.
The velocity of a wave is defined as the distance moved by a cyclic motion per unit time. The velocity of a wave is determined by the properties of the medium through which it moves; it does not not depend on the properties of the wave itself.

3 0

2 years ago

You drop a stone into a deep well and hear it hit the bottom 6.65 s later. This is the time it takes for the stone to fall to th

baherus [9]

Answer: ok, so total time is Tt = 6.65 seconds = time falling + time of sound traveling.

the time of the rock falling is given by: $(g/2)*t₀^{2} -h = 0$ (1)

where h is the heigth of the hole, and t₀ is the time it took to reach the bottom.

the time of the sound traveling is given by 343*t₁ - h = 0 (2)

so t₁ + t₀ = 6.65s = total time

then you know that t₁ = 6.65s - t₀

so now you have two variables, t₀ and h, and we want to know the value of h, so we want to write t₀ as a function of h.

in the second equation we have now: 343*(6.65 - t₀) = h

so t₀ = (-h/343 + 6.65)s

replacing this on the first equation you have:

$(g/2)*(-h/343 + 6.65)^{2} -h = 0$

now you want to take h to the right side so

so if we replace g by 9.8 meters over seconds square we get

h = $\frac{-1.19 -+ \sqrt[2]{1.56} }{2*0.00041}$

where you will take the positive root

h = 61 meters

3 0

3 years ago