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2 years ago

1.) What things signal the coming of spring?

Physics

1 answer:

olasank [31]2 years ago

7 0

Answer:

In Explanation

Explanation:

The signs of the coming of spring include firstly the sight of Robins. It is believed that the sight and singing of the Robins is considered arrival of spring by many in the US. Secondly, the winter is not yet over but the blooming of Daffodils first of all flowers is indication of the spring. As the air gets warmer the flowers bud and new leaves start growing on trees since the days also begin to get longer providing much warmth which also an indicator of the spring.
Without the axial tilt of our Earth, firstly, the Sun would have remained above the equator (Equinox) forever but fortunately due to the tilt we get equinoxes twice a year and not forever. Moreover, the temperature and precipitation levels would not vary much and the equator would remain always warm and the poles always cold. Secondly, due to the tilt as the Earth orbits around the Sun and with changes in solstices we get variety of the seasons which would have been impossible otherwise.

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A water molecule consists of two hydrogen atoms bonded with one oxygen atom. The bond angle between the two hydrogen atoms is 10

Brut [27]

Explanation:

According to the figure,

$\vec{p} = q\vec{d}$

Formula to calculate net dipole moment is as follows.

$\vec{p_{net}} = 2P Cos 52^{o}\hat{i} + (0)\hat{j}$

$\vec{p_{net}} = 2qd Cos 52^{o}\hat{i}$

= $2 \times 1.6 \times 10^{-19} \times 0.958 \times 10^{-10} \times Cos 52^{o}\hat{i}$

= $1.88 \times 10^{-29}\hat{i}$ C-m

Therefore, we can conclude that the net dipole moment for given water molecule is $1.88 \times 10^{-29}\hat{i}$ C-m.

5 0

3 years ago

Which will increase the energy of motion of water molecules?

Allisa [31]

A) add heat will be the answer

4 0

3 years ago

A variable force of 6x−2 pounds moves an object along a straight line when it is x feet from the origin. Calculate the work done

Marianna [84]

Answer:

931.00ft-lb

Explanation:

Pls see attached file

3 0

2 years ago

An object is dropped and falls freely to the ground with an acceleration of g. If it is thrown upward at an angle instead, its a

Savatey [412]

Answer:

Explanation:

if an object is thrown upward or at any angle, the acceleration acting on that object is the same as acceleration due to gravity which always acts towards the vertically downwards direction because there is no acceleration or the force acting on the object in horizontal direction.

Thus, the acceleration is same as acceleration due to gravity g.

5 0

3 years ago

Calculate the angle of refraction of 30.0° light shines from water into ice. The indices of refraction for water and ice are 1.3

WITCHER [35]

Answer:

The angle of refraction Ø2 equals 62.95° ≈ 63°

Explanation:

The relationship between the angles of incidence and

refraction , with respect to light or other waves passing through two different substances or media, such as glass, water or air is given by Snell's Law.

Snell's Law states that the when light travels from one medium to another, it generally refracts.

It is given by the mathematical expression;

[SinØ1°/SinØ2°] = [n2/n1]

Cross multiplying, we have;

n1 × SinØ1° = n2 × SinØ2°

where, n is the indices of refraction of each substance

Ø is the angle between the ray and the line normal to the surface.

Given the following values;

n1 = 1.36 n2 = 1.31 Ø1 = 30° Ø = ?

n1 × SinØ1° = n1 × SinØ2°

SinØ2° = [n1 × SinØ1°]/n2

substituting the values respectively;

SinØ2° = [1.36 × Sin30°]/1.31

SinØ2° = [1.36 × 0.5]/1.31

SinØ2° = 0.68 × 1.31

SinØ2° = 0.8906

Ø2° = Sin–¹(0.8906)

Ø2° = 62.95° ≈ 63°

4 0

3 years ago