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2 years ago

if a car is taken from the garage driven for 100km before returning to the garage after 2 hours what is it average speed?

Physics

1 answer:

brilliants [131]2 years ago

8 0

Answer:

50km/h

Explanation:

Average Speed = Distance/Time

100km/2h = 50km/h

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In a Young's double-slit experiment the separation distance y between the second-order bright fringe and the central bright frin

atroni [7]

Answer:

Y = 0.0254 m = 25.4 mm

Explanation:

The formula for the fringe spacing in Young's Double-slit experiment is given by the following formula:

$Y = \frac{\lambda L}{d}$

where,

Y = fringe spacing = 0.0176 m

λ = wavelength = 425 nm = 4.25 x 10⁻⁷ m

L = Distance between screen and slits

d = slit separation

Therefore,

$\frac{0.0176\ m}{4.25\ x\ 10^{-7}\ m} = \frac{L}{d}\\\\\frac{L}{d} = 41411.76$

Now, for:

λ = 614 nm = 6.14 x 10⁻⁷ m

$Y = (6.14\ x\ 10^{-7}\ m)(41411.76)\\$

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3 years ago

vA child is in danger of drowning in the Merimac river. The Merimac river has a current of 3.1 km/hr to the east. The child is 0

ikadub [295]

Answer:

$d = 2.26 km$

Explanation:

Let the child is moving with speed same as the speed of water flow

So here the position of child with respect to flow must be zero

And if the boat start at an angle with the vertical

so its relative speed with flow of water is given as

$v_x = 24.8 sin\theta$

$v_y = 24.8 cos\theta$

now the time to reach the child is given as

$\frac{0.6}{24.8 cos\theta} = \frac{2.5}{24.8 sin\theta }$

so now we have

$\theta = 76.5 degree$

So the time to catch the child is given as

$t = \frac{0.6}{24.8 cos78.2}$

$t = 0.104 h$

So distance moved by it in 0.104 h

distance moved by the boat in upstream direction given as

$x = (24.8 sin 74.8 - 3.1)(0.104)$

$x = 2.18 km$

In y direction the displacement of boat is

$y = 0.6 km$

net displacement of the ball is given as

$d = \sqrt{x^2 + y^2}$

$d = \sqrt{2.18^2 + 0.6^2}$

$d = 2.26 km$

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3 years ago

Which list of observations is the best evidence of only a chemical change occurring?

Aleonysh [2.5K]

Answer:

Explanation:

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3 years ago

A guyot is ________. A. any portion of the ocean floor that is topographically higher than surrounding sea floor B. an extinct o

Maksim231197 [3]

Answer:

c.an extinct oceanic hot-spot volcano that has subsided below sea level

Explanation:

- Marine geology defines a guyot as an isolated underwater volcanic mountain with a flat top more than 200m below the surface of the sea.

-The flat top is due to years of wave erosion.

-Guyots can form a chain of seamounts as the ocean plate of the Earth's crust moves slowly over a hot spot that remains stationary beneath the plate.

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3 years ago

Which two types of waves can transmit energy through a vacuum?

nalin [4]

The answer would be the sound waves.

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3 years ago

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