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valentina_108 [34]
3 years ago
14

John and Caroline go out for a walk one day. This graph represents their distance from home.

Physics
2 answers:
Serga [27]3 years ago
3 0

Answer:

Option C is the correct answer.

Explanation:

  We have velocity of a body = Change in position/ Time.

  Considering first portion of graph,

  Change in position = 30 - 0 = 30 m

  Time = 0.75 hours = 45 minutes = 2700 seconds

   Velocity = 30/2700 = 0.011 m/s

  Considering second portion of graph,

  Change in position = 30 - 30 = 0 m

  Time = 0.5 hours = 30 minutes = 1800 seconds

   Velocity = 0/1800 = 0 m/s

 Considering third portion of graph,

  Change in position = 0 - 30 = -30 m

  Time = 0.75 hours = 45 minutes = 2700 seconds

   Velocity = -30/2700 = -0.011 m/s

So firstly they walked in one direction(positive direction), then they were still(velocity is zero), then they walked in the opposite direction( velocity is negative).

Option C is the correct answer.

Yuri [45]3 years ago
3 0

Answer:

I had this same question the answer is C 100% sure

Explanation:

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Answer:

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Consider a metal single crystal oriented such that the normal to the slip plane and the slip direction are at angles of 60 and 3
Scilla [17]

Explanation:

Given that,

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Angle by the slip direction with the tensile axis β= 35°

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We need to calculate the shear stress applied at the slip plane

Using formula of shear stress

\tau=\sigma\cos\alpha\cos\beta

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\tau=12\cos60\times\cos35

\tau=4.91\ MPa

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So, The crystal will not yield.

Now, We need to calculate the applied stress necessary for the crystal to yield

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\sigma=\dfrac{6.2}{\cos60\cos35}

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3 0
3 years ago
During a summer with little rainfall, your house on a hill slope experiences an interval during which your well runs dry. You ha
irina1246 [14]

Answer and Explanation:

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  1. Because of the summer and the little rain, the underwater supply goes low.
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What causes light to bend when it moves from one transport medium to another
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Answer:

The bending of light as it passes from one medium to another is called refraction. The angle and wavelength at which the light enters a substance and the density of that substance determine how much the light is refracted. The bending occurs because light travels more slowly in a denser medium.

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3 years ago
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Tcecarenko [31]

Answer:

B

Explanation:

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3 0
2 years ago
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