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Artist 52 [7]
3 years ago
6

Pls help me I want to get this done

Physics
1 answer:
Simora [160]3 years ago
8 0
K:potassium
Cu:copper
Cl: chlorine
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A horizontal spring with spring constant 200N/m is compressed by 15cm and used to launch a 2kg box across a frictionless horizon
kobusy [5.1K]

Answer:

Explanation:

Given that,

Spring constant k=200N/m

Compression x = 15cm = 0.15m

Attached mass m =2kg

Coefficient of kinetic friction uk= 0.2

The energy in the spring is given as

U =½kx²

U = ½ × 200 × 0.15²

U = 2.25J

Force in the spring is given by Hooke's law

F = ke

F = 200×0.15

F = 30N

The weight of body which is equal to the normal is give as

W = mg

W = 2 × 9.81

W = 19.62N

W = N = 19.62 Newton's 2nd Law

From law of friction,

Fr = uk•N

Fr = 0.2 × 19.62

Fr = 3.924

Using newton second law again

Fnet = F - Fr

Fnet = 30 - 3.924

Fnet = 26.076

Work done by net force is given as

W = Fnet × d

W = 26.076d

Then, the work done by this net force is equal to the energy in the spring

W = U

26.076d = 2.25

d = 2.25/26.076

d = 0.0863m

Which is 8.63cm

So the box will slide 8.63cm before stopping

6 0
3 years ago
A particle of mass.25 kg is moving with a speed of 7m/s due north.find it's kinetic energy.<br>​
Ivenika [448]

Answer:

Explanation:

612J

3 0
3 years ago
What is the period of a wave if the wavelength is 100 m and the speed is 200 m/s?
Stells [14]
This is simple question and easy to understand.
so first you use a formula to calculate frequency of the wave.
v _ stands for velocity a.k.a speed
f_ stands for frequency which you have to find.
(pronounced lemda)_ stands for wavelength.
Then you gonna place all your values according to you have in the formula as shown then solve for f.
Finally, you use the time formula
where
T_ is period a.k.a time which equal to the reciprocal of frequency or equal to 1/f.
Simply input your values according to the formula and you your answer as 0.5s

8 0
3 years ago
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A very long, straight solenoid with a cross-sectional area of 2.00 cm2 is wound with 94.1 turns of wire per centimeter. Starting
julia-pushkina [17]
Yeah I have no clue what you saw me on lol yeah I
5 0
3 years ago
The wavelength and energy of a wave are inversely proportional. Based on this, which wave listed would have the LOWEST energy.
spayn [35]
D because it has the lowest wavelength, meaning the wave is the longest. Its crest are more spaced out creating lower energy.  The smaller distance between the crests equals the higher the sound. Creating higher energy.

I am 95% sure this is right. Very sorry if it isn't.
Hope it helps. ;3
5 0
3 years ago
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