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Elena-2011 [213]

3 years ago

14

If an airplane travels a distance of 500 km in 5 hours, what is its average speed?

2 answers:

kolezko [41]3 years ago

8 0

The plane travels 100km per hour

Vinil7 [7]3 years ago

8 0

500km/5hrs= 100km/hr

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What would happen to the wavelength of a wave as the velocity is increased and the

slamgirl [31]

Answer: wavelength will increase

Explanation:

Velocity is directly proportional to wavelength,as the velocity is increased, wavelength is also increased

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4 years ago

Where in the world does average daily temperature exceed the annual temperature range?

padilas [110]

The average daily annual temperature range is exceeded in places such as deserts. Deserts tend to be hotter due to the lack of water contained within them. This means that all of the sun's thermal radiation heats up the ground and air. These factors cause deserts to have above average temperatures.

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3 years ago

A mass is oscillating horizontally on a spring. At the locations A, B, C, D, and E, photogates are used to measure the speed of

svetoff [14.1K]

Complete Question

The complete question is is shown on the first uploaded

Answer:

The elastic potential energy at point B is $PE_{elastic} = 50J$

The kinetic energy at point D is $KE = 75J$

Explanation:

Looking at the given point we can observe that mechanically energy(i.e potential and kinetic energy ) is conserved and it value is $E_ {m} = 100J$

So at point B

$E_{m} = PE_{elastic} +KE$

$100 = PE_{elastic} + KE$

KE at point B is 50J

So $PE_{elastic} = 100 - 50 = 50J$

Now at point D

$E_{m} = PE_{elastic} +KE$

$PE_{elastic}$ at point D is 25J

So $KE = 100 - 25 = 75J$

4 0

3 years ago

How long would it take a machine to do 5000 J of work if the power rating of the machine is 100 watts?

NeX [460]

Answer:

25 N; 250 W.

Explanation: Work Done

=

Force

×

Displacement

×

cos

(

The angle between Force and Displacement

)

So, Let's Assume the Force to be

x

Newtons.

So, According to The Sum,

×

x

x

⋅

100

=

2500

⇒

x

=

25

00

1

00

=

25

So, The force was

25

N

.

And, We also know,

Power

=

Work Done

Time

So,

The Power of the Machine =

2500

10

Watts

=

250

Watts

4 0

3 years ago

Unpolarized light passes through two polarizers. Find the fraction of light from the first polarizer that gets through the secon

meriva

Answer:

0.5

Explanation:

Data provided in the question:

The angle between their transmission axes, θ = 60°

Now,

We have the relation,

I₁ = I₀cos²θ

where,

I₁ is the intensity of the transmitted light

I₀ is the intensity of the incident light

on rearranging, we get

$\frac{I_1}{I_0}$ =cos²60°

or

$\frac{I_1}{I_0}$ =0.5

8 0

4 years ago

Read 2 more answers