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Sophie [7]
3 years ago
13

Select the correct answer.

Physics
1 answer:
Delicious77 [7]3 years ago
7 0

Answer: A is the correct option.

Explanation:

It was officially declared eradicated in 1979 in the United States.

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Bart runs up a 2.91 meters high flight of stairs at a constant speed in 2.15 seconds. If barts mass is 65.9kg determine the work
Tanzania [10]

Answer:

1879.33J

874.1W

Explanation:

Given parameters:

Distance covered  = 2.91m

Time taken  = 2.15s

Mass of Bart = 65.9kg

Unknown:

Work done  = ?

Power rating  = ?

Solution:

Here, the work done is related to the the potential energy in climbing this flight of stairs.

  Work done = Potential energy  = mgH

where m is the mass

           g is the acceleration due to gravity

           H is the height

Work done  = 65.9 x 9.8 x 2.91  = 1879.33J

Power is defined as the rate at which work is being done.

         Power = \frac{Work done }{time taken}

                     = \frac{1879.33}{2.15}

                      = 874.1W

6 0
3 years ago
Two boxes need to be moved into storage. Jamal and Jude each want to move a box. The force of gravity on both the boxes is 50 N.
jolli1 [7]

Answer:

Explanation:

Remark

If both are trying to get the box into storage and they can only  use lifting to do it, then Jude won't be able to do it. This assumes they cannot slide the boxes. Jude is not using enough force to overcome gravity so the box will just sit.

On the other hand Jamel is putting enough force to not only lift the box but it will move upwards against gravity. If we ignore that fact, then Jamel will get his box into storage.

Answer: A

4 0
2 years ago
SCIENCE HELP PLEASE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Andrews [41]
It's by..................
energy/time
6 0
4 years ago
What are cirrus.cirrostratus. And cirrocumulus clouds made up of
Irina-Kira [14]
<span><span>1.       </span>All clouds are made up of tiny ice crystals or small water droplets that form together with a dust on the atmosphere.
Cirrus, cirrostratus and cirrocumulus are made up of ice crystals. It forms when the water vapor goes condensation at high altitudes in where the pressure on the atmosphere reaches the point from 600 mbar at 4000 meter above the sea level up to 200mbar at 12 000m above sea level. These clouds form thunderstorms, cyclones and contrails (a manmade cloud).</span> <span>

</span>



3 0
3 years ago
True or False A Safety Data Sheet (SDS) provides even more information on chemicals than a label.
Sonja [21]

A Safety Data Sheet (SDS) provides even more information on chemicals than a label: True.

<h3>What is a Safety Data Sheet (SDS)?</h3>

A Safety Data Sheet (SDS) can be defined as a text-based document (bulletin) that is developed to provide more information with respect to the chemical and physical properties of a chemical compound, substance or equipment such as:

  • Flammability
  • Temperature
  • Radioactivity

Additionally, a Safety Data Sheet (SDS) contains information on the potential health hazards and safety precautions for proper use, handling, storage and transportation of a chemical compound, substance or equipment.

In conclusion, we can deduce that a Safety Data Sheet (SDS) provides even more information on chemicals than a label, which only contains lesser information about a product.

Read more on Safety Data Sheet (SDS) here: brainly.com/question/21522463

4 0
3 years ago
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