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Leviafan [203]
3 years ago
9

A 2.0m long pendulum is released from rest when the support string is at an angle of 25 degrees with the vertical. What is the s

peed of the bob at the bottom of the swing?
Physics
1 answer:
Blizzard [7]3 years ago
8 0

Answer:

v=1.92m/s

Explanation:

Given data

Length h=2.0m

Angle α=25°

To find

Speed of bob

Solution

From conservation of energy we know that:

P.E=K.E\\mgh=(1/2)mv^{2}\\ gh=(1/2)v^{2}\\v^{2}=\frac{gh}{0.5}\\ v=\sqrt{\frac{gh}{0.5}}\\ v=\sqrt{\frac{(9.8m/s^{2} )(2.0-2.0Cos(25^{o} ))}{0.5}}\\v=1.92m/s

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madreJ [45]

Answer:

A.The new discovery might cause the theory to be dismissed since it contradicts it.

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D.The new discovery might further deny the theory since it presents evidence that contradicts it.

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4 0
3 years ago
The Tour de France is the biggest bicycle race in the world. The race lasts for three weeks and is one of the biggest sporting e
avanturin [10]

Answer:

Yellow, green, polka dot and white jerseys

Explanation:

Tour de France is the biggest bicycle race in the world held at France over a period of 23 days. At the end of each day of racing they give to the certain riders FOUR different colored jerseys:

  1. The yellow jersey is given to the overall winner at each stage, this shows the rider who was the best in the previous stage.
  2. The green jersey is given to the best sprinter of each stage,
  3. The polka dot jersey is given to the rider who first reach the crest of designated hills and mountains at each stage.
  4. The white jersey is given to the fastest rider at each stage under 25 years at the beginning of the racing year.

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5 0
3 years ago
Explain why data from at least three seismic stations are needed to locate an earthquake epicenter
Helga [31]
Each station has a circle made of possible epicenters. When you have atleast 3 epicenters you can narrow it down to 1 epicenter and there's that final point. Each station can detect how far away the epicenter was (by transverve body waves). When you only have one seismic station it's impossible to locate an earthquake epicenter.
7 0
3 years ago
A sound wave travels through air. In which regions of the wave are air molecules the least dense? *
mariarad [96]

Answer:

Rarefactions

Explanation:

3 0
3 years ago
What type of force pulls in two opposite directions?
Mnenie [13.5K]

<u>Answer</u>

a. tension (associated with normal faults)

c. diagonal

<u>Explanation</u>

A pull of spring or of string on both ends of an object is called tension. So for the question one, the answer is <em> tension (associated with normal faults)</em>

There are three types of faults. Faults are produced by stress or strain by moving plates. These faults are: normal faults, reverse faults and transcurrent or Strike-slip. Strike-slip faults can also be called transform fault. The answer to the second question is <em>c. diagonal.</em>

8 0
3 years ago
Read 2 more answers
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