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Marina CMI [18]
3 years ago
15

Which event is an example of melting?

Physics
1 answer:
qaws [65]3 years ago
5 0

Answer:

welding metal

Explanation:

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How large must the coefficient of static friction be between the tires and road, if a car rounds a level curve of radius 85 m at
tatuchka [14]

Answer:

0.66

Explanation:

By using the formula

u = v^2 / r g

Where u is coefficent of friction

u = 23.5 × 23.5 / (85 × 9.8)

u = 0.66

4 0
3 years ago
What is the name of the scale used to measure hurricanes
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If a runner goes 500 meters with an average speed of 7.0 m/s. How long were they running?
ivann1987 [24]

Answer: s=d/t= 500/7.0=71.42 m/s

Explanation:

5 0
3 years ago
Mandy is testing an unknown solution to determine whether it is an acid or a base. She places a piece of red litmus paper into t
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The solution is a base
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A 0.80 kg object tied to the end of a 2.0 m string swings as a pendulum. At the lowest point of its swing, the object has a kine
devlian [24]

Answer:

3.32 m/s

Explanation:

From the law of conservation of energy, the sum of mechanical and kinetic energy should be equal to the 10 J given. Potential energy is given by mgh where m is mass, g is acceleration due to gravity and h is the height. For this case, h= l(1-cos\theta) and l is string length, given as 2 m, \theta is given as 50 degrees. Kinetic energy is given by 0.5mv^{2} and it is this velocity that is unknown.

10J=0.5\times 0.8kg\times v^{2}+ 0.8kg\times 9.81\times 2m(1-cos 50^{\circ})\\v\approx 3.32 m/s

6 0
3 years ago
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