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3 years ago

1)Which statement best describes energy in an open system?

Physics

2 answers:

zimovet [89]3 years ago

6 0

B an open system flow both

Aleks04 [339]3 years ago

3 0

the first question is b) Energy and matter flow into and out of the system. im not sure about the second one

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if a water wave vibrates up and down 4 times each second,the distance between 2 successive crest is 5 meters, and the height fro

Mnenie [13.5K]

frequency=4Hz

wavelength=5m

amplitude=1/2×2=1m

period=1/frequency

1/4=0.25seconds.

velocity=wavelength×frequency

=5×4

=20m/s

5 0

3 years ago

Read 2 more answers

A pilot heads his jet due east. The jet has a speed of 475 mi/h relative to the air. The wind is blowing due north with a speed

oksian1 [2.3K]

Explanation:

a. The velocity of the wind as a vector in component form will be represented as v vector:

$v=30j$

b.The velocity of the jet relative to the air as a vector in component form will be represented as u vector

$u=475i$

c. The true velocity of the jet as a vector will be represented as w:

$w=u+v$

$w=475i+30j$

d. The true speed of the jet will be calculated as:

$IwI=\sqrt{(475)^2+(30)^2}$

$IwI=\sqrt{225625+900}$

$IwI=\sqrt{226525}$

$IwI=476 mi/h$

e. The direction of the jet will be:

$tita=tan^{-1}\frac{30}{475}$

$tita=tan^{-1}(0.0632)$

$tita=3.62degrees,or,N86.38degreesS$

7 0

3 years ago

Laura puts her file cabinet on a small cart with wheels which will occur. A Laura will increase the amount of friction. B Laura

kow [346]

Answer: b

Explanation:

6 0

3 years ago

Which are characteristics of concave mirrors? Check all that apply.

aalyn [17]

Answer:

the answers are 1 2 and 5!

5 0

4 years ago

What would the density of an object be with a mass of 0.8g

True [87]

The density of the object is 0.032 g/cm^3.

<h3>What is density?</h3>

The term density means the ratio of the mass to the volume of an object. Now we know that when an object is dense that it would sink to the bottom of a fluid.

Now given that;

Mass = 0.8 g

volume= 25 cm^3

Density = mass/volume

Density = 0.8 g / 25 cm^3

= 0.032 g/cm^3

Learn more about density:brainly.com/question/15164682

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MISSING PARTS

What is the density of an object having a mass of

0.8g and a volume of 25cm^3

4 0

2 years ago