3 years ago

Which laboratory activity involves a chemical change?

Physics

1 answer:

amid [387]3 years ago

3 0

Answer:

leaving a copper penny in vinegar until it turns green

Explanation:

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4 years ago

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During a hard sneeze, your eyes might shut for 0.32 s. If you are driving a car at 76 km/h during such a sneeze, how far does th

garik1379 [7]

Answer:

Distance, d = 6.75 meters

Explanation:

Given that,

Time taken by the eyes to shut during a hard sneeze, t = 0.32 s

Speed of the car, v = 76 km/h = 21.11 m/s

We need to find the distance covered by the car during this time. The product of speed and the time taken by the car is called the distance covered by the it. Mathematically,

$d=v\times t$

$d=21.11\times 0.32$

d = 6.75 meters

So, the car will cover 6.75 meters during that time. Hence, this is the required solution.

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3 years ago

Describe in short the working system of a water pump

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The pump is powered by an electric motor that drives an impeller, or centrifugal pump. The impeller moves water, called drive water, from the well through a narrow orifice, or jet, mounted in the housing in front of the impeller.

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4 years ago

3. Nearsighted people can undergo a medical procedure called keratotomy to produce normal (or at least more-normal) vision. In t

Mademuasel [1]

Answer:

P= -1.83D

Explanation:

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3 years ago

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The answer is 2,1,3,2

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hope this helps :)

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