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NeX [460]
2 years ago
9

how to find the change in spring potential energy of the block-spring system from when the block is released to when the block h

as its greatest speed
Physics
1 answer:
Serhud [2]2 years ago
7 0

Answer: Subtract the kinetic energy of the block at x=0.02mx=0.02m from the kinetic energy of the block at x=0.00mx=0.00m.

Explanation:

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You can tell from reading this passage that -
Romashka-Z-Leto [24]

Answer: B or "diamonds are rare,valuable gems".

Explanation:

since the link does not show very much, I don't know if A is correct or not. D is incorrect because that  is an opinion. C is incorrect.

4 0
3 years ago
A projectile is shot at an angle 45 degrees to the horizontalnear the surface of the earth but in the absence of air resistance.
juin [17]

Answer:

Explanation:

Given

For first case

launch angle \theta =45^{\circ}C

at highest point h=150 m/s

150=u\cos 45

u=\frac{150}{\cos 45}=212.132 m/s

For second case

\theta _2=37^{\circ}C

at highest Point velocity is u\cos \theta _2

=212.132\times \cos 37

=169.41 m/s

as there is no acceleration in x direction therefore horizontal velocity is same          

7 0
3 years ago
Read 2 more answers
Energy a substance or system has because of its motion Is what?
iragen [17]

Answer:

The answer is Mechanical Energy

8 0
3 years ago
CONFUSED!!!
otez555 [7]

A. Impulse is simply the product of Force and time. Therefore,

I = F * t                                 ---> 1

where I is impulse, F is force, t is time

 

However another formula for solving impulse is:

I = m vf – m vi                    ---> 2

where m is mass, vf is final velocity and vi is initial velocity

 

Therefore using equation 2 to solve for impulse I:

I = 2000kg (0) – 2000kg (77 m/s)
I = -154,000 kg m/s

 

B. By conservation of momentum, we also know that Impulse is conserved. That means that increasing the time by a factor of 3 would still result in an impuse of -154,000 kg m/s. So,

I = F’ * (3 t) = -154,000 kg m/s

Since t is multiplied by 3, therefore this only means that Force is decreased by a factor of 3 to keep the impulse constant, therefore:

(F/3) (3t) = -154,000 kg m/s

 

 

Summary of Answers:

A. I = -154,000 kg m/s

B. Force is decreased by factor of 3

8 0
3 years ago
A corrosion cell consisting of Zinc and Nickel is formed. Which of the following statement is true? (A) Nickel will act as Anode
Yanka [14]

Answer: B) Zinc will act as Anode

Explanation:

Standard reduction potential of zinc and nickel are:

E^0_{[Zn^{2+}/Zn]}= -0.76V

E^0_{[Ni^{2+}/Ni]}=-0.25V

Here Zinc undergoes oxidation by loss of electrons, thus act as anode as it has more negative reduction potential.

Nickel undergoes reduction by gain of electrons and thus act as cathode. as it has less negative reduction potential.

Zn+Ni^{2+}\rightarrow Zn^{2+}+Ni

E^0_{cell}=E^0_{cathode}- E^0_{anode}

Where both E^0 are standard reduction potentials.

E^0=E^0_{[Ni^{2+}/Ni]}- E^0_{[Zn^{2+}/Zn]}

E^0=0.25-(-0.76V)=0.51V

As the emf is positive, the reaction is spontaneous and reaction will occur.

Thus Zinc will act as anode.

4 0
3 years ago
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