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4 years ago

For work to be done on the object the object has to

Physics

2 answers:

Fittoniya [83]4 years ago

6 0

Answer:

Work is defined by the movement done by an object caused by a force.

So for work to be done on an object, the object must be receiving a force and being moved or changing position, and we can synthesize this by "the object has to accelerate"

Where acceleration implies a force applied, and an accelerating body is changing his velocity, so it is moving.

Nata [24]4 years ago

3 0

Gain energy

good luck!

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The diagram shows a wave. The quantity shown is the amplitude. This quantity is directly proportional to which of these other qu

Katen [24]

As we know that frequency and wavelength are dependent on each other

and this is given by

$f = \frac{c}{\lambda}$

here we know that

$\lambda$ = wavelength

f = frequency

c = speed of wave

while for energy and intensity of wave we know that

Energy = $KA^2$

here A = amplitude of wave

so energy directly depends on amplitude of wave

so correct answer will be

<em>A) Energy</em>

3 0

4 years ago

Read 2 more answers

Aerogenerators are used to produce electricity from

ki77a [65]

Like windmills they use the winds to generate their power.

4 0

3 years ago

The gravity between me (68 kg) and my laptop (0.91 kg)

zepelin [54]

If you mean gravitational force, then it is GMm/r^2, which is G(68)(.91)/ (the distance between you and the laptop), where G is the universal gravitational constant

4 0

3 years ago

A ray of light strikes a sheet of glass (n=1.5) at an angle of 25° with the normal. Find the angle of the refracted ray within t

IRINA_888 [86]

Answer:

(d) 16°

Explanation:

Using Snell's law as:

$n_i\times {sin\theta_i}={n_r}\times{sin\theta_r}$

Where,

${\theta_i}$ is the angle of incidence ( 25.0° )

${\theta_r}$ is the angle of refraction ( ? )

${n_r}$ is the refractive index of the refraction medium (glass, n=1.5)

${n_i}$ is the refractive index of the incidence medium (air, n=1)

Hence,

$1\times {sin25.0^0}={1.5}\times{sin\theta_r}$

Angle of refraction = $sin^{-1}0.2817$ = 16°

7 0

3 years ago

You overhear two students discussing the topic of Doppler shift.

9966 [12]

Answer:

agree with student 2, disagree with student 1

Explanation:

If you want to know if the wavelength of light was shifted you have to know the original wavelengths

Since we know the absorption spectrum for elements like hydrogen, we can look for these absorption lines in the star's spectra and figure out what direction these lines are shifted and tell if the star is moving away or towards us

The color of the star refers to the temperature of the star's surface which is not related to the doppler shift of the star

5 0

4 years ago