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Oksana_A [137]
2 years ago
5

1.55 J of work was done on the object that moved 5 meters. How much force was applied to the

Physics
1 answer:
Firdavs [7]2 years ago
3 0

Answer:

Work=force x displacement

Force =work/ displacement

F=1.55/5

F=0.31N

Explanation:

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An attack helicopter is equipped with a 20- mm cannon that fires 88.7 g shells in the forward direction with a muzzle speed of 9
Svetradugi [14.3K]
The impulse imparted to the shells equals the change in the momentum:
Fav*(Delta t)= Delta m*v.
The mass change is
Delta m= n*m= (89.9shells)*(88.7g)=7.97Kg
So the average force is
F=((v)*(Delta m))/t= ((929)*(7.97))/4.84=1529.78 N
Since the velocity of the shells is much greater than the velocity of the helicopter, there is no need to use relative velocity.



4 0
3 years ago
A chamber fitted with a piston contains 1.90 mol of an ideal gas. Part A The piston is slowly moved to decrease the chamber volu
yarga [219]

Answer:

The work done is 5136.88 J.

Explanation:

Given that,

n = 1.90 mol

Temperature = 296 K

If the initial volume is V then the final volume will be V/3.

We need to calculate the work done

Using formula of work done

W=nRT\ ln(\dfrac{V_{f}}{V_{i}})

Put the value into the formula

W=1.90\times8.314\times296\ ln(\dfrac{\dfrac{V}{3}}{V})

W=1.90\times8.314\times296\ ln(\dfrac{1}{3})

W=−5136.88\ J

The Work done on the system.

Hence, The work done is 5136.88 J.

5 0
3 years ago
Positively-charged particles consisting of two protons and two neutrons emitted by radioactive materials are
BARSIC [14]

Answer:

The answer to your question is Alpha particles.

Explanation: An electron released by a radioactive nucleus that causes a neutron to change into a proton is called a beta particle.

6 0
2 years ago
When the vectors a→ =8n and b→ =6n find the c
n200080 [17]

Answer:

14 N and 2 N

Explanation:

We have two vectors:

a = 8 N

b = 6 N

When the two vectors are in the same direction, their resultant is simply given by the sum of the magnitudes of the two vectors. Therefore, we will have:

c=a+b=8 + 6 = 14 N

Vice-versa, when the two vectors are in opposite directions, we have to consider one of the two vectors as being negative: therefore, the resultant will be given by the difference between the magnitudes of the two vectors. Therefore, in this case, we will have:

c=a-b=8-6 = 2N

3 0
2 years ago
If the sine of an angle is 4/7 what is the cosine of its complement.
kap26 [50]

Answer: 0.57

Explanation:

Let's begin by explaining that two angles are complementary when they sum is 90\°:

\theta + \alpha=90\°

Having this clear, let's find \theta from the following trigonometric function:

sin \theta=\frac{4}{7}

\theta=sin^{-1} (\frac{4}{7})=34.84 \°

Now that we have the value of \theta, let's find \alpha:

\alpha=90\°-\theta

\alpha=90\°-34.84 \°

\alpha=55.15\° This is the complement of angle \theta

Then, the cosine of the complement \alpha is:

cos \alpha=cos(55.15\°)

cos \alpha=0.57 This is the answer

7 0
3 years ago
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