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Oksi-84 [34.3K]

4 years ago

13

What is the displacement of the car after 5 hours a. 0 km b. 15 km c. 40 km d. 20 km

1 answer:

iren2701 [21]4 years ago

3 0

0 Km , Displacement is distance from starting point. Not distance of Journey.

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An object was released from rest at height of 1.65 m with respect to ground. Determine the time it takes the object to reach the

vivado [14]

Answer:

The time taken by the object to reach the ground is 0.58 seconds.

Explanation:

Given that,

An object was released from rest at height of 1.65 m with respect to ground. We need to find the time taken by the object to reach the ground. Initial speed of the object is 0 as it is at rest. It will move downward under the action of gravity such that, the distance covered by the object is given by :

$d=ut+\dfrac{1}{2}gt^2$

$d=\dfrac{1}{2}gt^2$

$t=\sqrt{\dfrac{2d}{g}}$

$t=\sqrt{\dfrac{2\times 1.65}{9.8}}$

t = 0.58 seconds

So, the time taken by the object to reach the ground is 0.58 seconds. Hence, this is the required solution.

8 0

4 years ago

The distance between the ruled lines on a diffraction grating is 1900 nm. The grating is illuminated at normal incidence with a

SashulF [63]

Answer:

3.28 degree

Explanation:

We are given that

Distance between the ruled lines on a diffraction grating, d=1900nm= $1900\times 10^{-9}m$

Where $1nm=10^{-9} m$

$\lambda_2=400nm=400\times10^{-9}m$

$\lambda_1=700nm=700\times 10^{-9}m$

We have to find the angular width of the gap between the first order spectrum and the second order spectrum.

We know that

$\theta=sin^{-1}(\frac{m\lambda}{d})$

Using the formula

m=1

$\theta_1=sin^{-1}(\frac{1\times700\times 10^{-9}}{1900\times 10^{-9}})$

$\theta=21.62^{\circ}$

Now, m=2

$\theta_2=sin^{-1}(\frac{2\times400\times 10^{-9}}{1900\times 10^{-9}})$

$\theta_2=24.90^{\circ}$

$\Delta \theta=\theta_2-\theta_1$

$\Delta \theta=24.90-21.62$

$\Delta \theta=3.28^{\circ}$

Hence, the angular width of the gap between the first order spectrum and the second order spectrum=3.28 degree

6 0

3 years ago

What is the largest Planet known to man?

viva [34]

It is the Jupiter from outer space. And the years from 170 light years away from the Earth.

8 0

4 years ago

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Steam is leaving a 4-L pressure cooker whose operating pressure is 150 kPa. It is observed that the amount of liquid in the cook

Anna71 [15]

Answer:

The mass flow rate is 2.37*10^-4kg/s

The exit velocity is 34.3m/s

The total flow of energy is 0.583 KJ/KgThe rate at which energy leave the cooker is 0.638KW

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7 0

2 years ago

The magnetic field created around a single wire is _________.

Margarita [4]

Answer:

A

Explanation:

it is weak I hope it helps u have a great day

7 0

3 years ago

Read 2 more answers