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Anna35 [415]
3 years ago
7

Please help me with this question

Physics
1 answer:
Zina [86]3 years ago
4 0

Answer:

D. The truck and trailer will experience a net force of 40 newtons backward

Explanation:

Taking the greatest force (trailer), and subtracting it by the smaller force (truck), we can find how many newtons the greater force is applying to pull the whole system:

2,790 - 2,750 = 40 N

Since we know that the trailer is the greater force, the truck & trailer are being pulled backwards by 40 Newtons

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The value of buoyant force is 700-450=300N
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If it requires 2.0 J of work to stretch a particular spring by 2.0 cm from its equilibrium length, how much more work will be re
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Answer:

16 J

Explanation:

It is given that,

Work done, W = 2 J

A spring is stretched by 2.0 cm from its equilibrium length

We need to find how much more work will be required to stretch it an additional 4.0 cm.

Let k is the spring constant of the spring. When W = 2J, and x = 2 cm, then energy required to stretch the spring is :

U=\dfrac{1}{2}kx^2\\\\k=\dfrac{2U}{x^2}\\\\k=\dfrac{2(2)}{(0.02)^2}\\\\k=10000\ N/m

The energy required to stretch the spring from 2 cm to additional 4 cm i.e. 2+4= 6 cm.

W=\dfrac{1}{2}k(x_2^2-x_1^2)\\\\=\dfrac{1}{2}\times 10000\times ((0.06)^2-(0.02)^2)\\\\W=16\ J

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3 years ago
A bullet is fired horizontally from a 17.7 m high cliff at a speed of 482.0. What is the distance from the cliff that the bullet
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Answer:

Horizontal distance=?m

Explanation:

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Following are the different layers of the sun’s atmosphere. Rank them based on the order in which a probe would encounter them w
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Answer:

Going from earth to the sun a probe would encounter the next layers in order:

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The chromosphere is between 400 km from the surface of the sun to 2100 km. In this layer the further you get away from the sun it gets hotter.

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The convection zone is where convection happens, hot gas rises, cools and rises again.

Radiative Zone is where the photons try to rise to move to higher layers.

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The relationship between the volume and temperature of a gas was first put forward by the French scientist Jacques-Alexandre-Cés
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1 , 2 and , 4 on usa test prep

Explanation:

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