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Gwar [14]
3 years ago
10

Sound waves travel at a speed of 330.0 m/s . How long does it take for the sound of thunder to travel 1.5 km ?

Physics
1 answer:
Leviafan [203]3 years ago
5 0

Answeibib

Explanation:jh j

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The crucial principle for a scientific experiment is to keep only ONE variable at a time.

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2. How have human activities and natural processes influenced the gradual or sudden change in global temperature? (You need a mi
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Human activities and natural processes have influenced the change in the global temperature by the following processes

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3 years ago
Soil conservation involves protecting _______ and preventing _______.
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<span>Soil conservation involves protecting soil quality and preventing erosion </span>
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Read 2 more answers
A force of constant magnitude pushes a box up a vertical surface, as shown in the figure.
Ray Of Light [21]

The work done on the box by the applied force is zero.

The work done by the force of gravity is 75.95 J

The work done on the box by the normal force is 75.95 J.

<h3>The given parameters:</h3>
  • Mass of the box, m = 3.1 kg
  • Distance moved by the box, d = 2.5 m
  • Coefficient of friction, = 0.35
  • Inclination of the force, θ = 30⁰

<h3>What is work - done?</h3>
  • Work is said to be done when the applied force moves an object to a certain distance

The work done on the box by the applied force is calculated as;

W = Fd cos(\theta)\\\\W = (ma)d \times cos(\theta)

where;

a is the acceleration of the box

The acceleration of the box is zero since the box moved at a constant speed.

W = (0) d \times cos(30)\\\\W = 0 \ J

The work done by the force of gravity is calculated as follows;

W = mg \times d\\\\W = 3.1 \times 9.8 \times 2.5 \\\\W = 75.95 \ J

The work done on the box by the normal force is calculated as follows;

W = (F_n) \times d\\\\W = (mg + F sin\theta) \times d\\\\W = (mg + 0) \times d\\\\W = mgd\\\\W = 3.1 \times 9.8 \times 2.5\\\\W = 75.95 \ J

Learn more about work done here: brainly.com/question/8119756

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