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bonufazy [111]
2 years ago
11

a girl performed 50j of work lifting a heavy box it took her 5 seconds to lift the box what is her power

Physics
1 answer:
son4ous [18]2 years ago
3 0

Answer:

10 W

Explanation:

Power is work over time.

P = W / t

P = 50 J / 5 s

P = 10 W

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A crane lifts a 1,750 kg mass using a steel cable whose mass per unit length is 0.88 kg/m. What is the speed of transverse waves
Sauron [17]

Answer:

139.6m/s

Explanation:

Calculate the tension first, T=m*g

mass(m): 1750kg, gravity(g): 9.8m/s^2

T= 1750*9.8

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Then calculate the wave speed using the equation v = √ (T/μ)

v= √(17150N)/(0.88kg/m)

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2 years ago
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Explanation:

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2 years ago
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ahrayia [7]

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5 0
3 years ago
Discuss the differences between Seismic Reflection and Seismic Refraction
Maru [420]

Explanation:

Seismic refraction is the bending of the seismic waves as they pass geological layers of the earth due to different densities. This is especially true for Primary waves because they can pass through all the layers of the earth both liquid and solid.

Seismic reflectivity is the bouncing back of seismic waves at a boundary of geological layers due to different densities or subsurface formation. This is especially true for secondary waves that are unable to pass through liquid layers of the earth like the outer core and mantle. When they reach the boundary of these layers they bounce back towards the earth's surface.

These properties of P and S waves are used to ‘auscultate’ the epicenter of an earthquake by triangulation.

Learn More:

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6 0
2 years ago
The size of the gravitational force between two objects depends on their__. frictional force, inertia, masses and the distance b
Inessa [10]

Answer:

Masses and distance between them

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The gravitational force between two objects can be calculated using Newton's Gravitational Law.

However, using logic, we can already dictate what the answer will be, for example. We know that the bigger an object is, the stronger its gravity is. This can be seen with how the moon is much smaller, and also has much less gravity.

Also, the distance between two objects also influences the gravity. This can be seen the further an object gets from Earth, the less of a pull the gravitational field has on it. Another example is that Pluto (being very far from the sun) has less of a gravitational effect from the sun, in comparison to Mercury (the closest plant to the sun).

3 0
3 years ago
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