3,772 Answered Questions for the topic Science

Science Math English Reading

1d

How can I improve my studying skills and habits?
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3d

About gravity my biggest question
I have a big question. According to Newton's law of Gravitation, every single atom attracts every other atom in the universe. The scientists have hypothesised a partical, gluon, to be responsible... more
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Science Chemistry Physics

5d

What is the basic difference between a cloud and fog?
What is the basic difference between a cloud and fog? A. Fog is a cloud near the ground. B. Clouds form when air is cooled, whereas fog forms when air is heated. C. Clouds form when air is heated,... more
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Science Math Chemistry

9d

How much water must be evaporated each hour to dissipate as much heat as a typical electric air conditioner?
In regions with dry climates, evaporative coolers are used to cool air. A typical electric air conditioner is rated 1.17 x 10^4 Btu/h. How much water must be evaporated each hour to dissipate as... more
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Science Physics

9d

1b) An object 0.75 m tall is placed 3.4m in front of a convex mirror that has a focal length of -80cm. i) Calculate the image distance. ii) Calculate the image height.

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Science Chemistry

12d

If you evaporated 250. mL of a 3.0 M solution of iron (II) nitrite, what mass of iron (II) nitrite would you recover?
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Science Physics

13d

What is its velocity at the highest point?
A stone is thrown upward with a velocity of 4 m/s and fell down right after. What is its velocity at the highest point?
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Science Physics

13d

How to find the resultant of two vectors that are perpendicular to each other?
How to find the resultant of two vectors that are perpendicular to each other?
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14d

Need Help! Thankyou
. A lens has a focal length of 2m. A pencil is placed 3m from the lens.Where will the image of the pencil be formed? (show all work) (3 marks)Is the image inverted or upright? How do you know? (1... more
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Science Physics

14d

What is the defining law that helps Maxwell to solve the missing link between the existence of electricity and magnetism in space?
What is the defining law that helps Maxwell to solve the missing link between the existence of electricity and magnetism in space?
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17d

Physics question about AC generator
The AC generator rotation frequency is 16.5 Hz. The generator generates 50 Hz alternating current. How many pairs of magnetic poles this generator has?The correct answer is 3 pairs.
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18d

Urgent help (I need in 10 hours) Physiological Psychology

Answer the questions directly and briefly. Why is muscle that has sustained significant damage unable to produce the same amount of power as it could before being damaged?  Does the lack of sleep... more
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Science

19d

Describe the process of the water cycle?

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19d

What is the difference in voltage between the plates? Science
Two large parallel plates are 2.0 cm apart. The strength of the electric field between them is 100.0 N/C . What is the difference in voltage between the plates?(a) −2.0 V(b) +2.0 V(c) 0 V(d) +20 VI... more
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Science Chemistry Physics

19d

Where is the image of the object? Science
An object is placed 4.0 cm to the left of a convex lens with a focal length of +8.0 cm . Where is the image of the object?(a) 8 cm to the left of the lens(b) 8 cm to the right of the lens(c) 12 cm... more
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Science Physics

21d

A 5cm pencil is placed at a distance of 20cm from a converging mirror with a focal length of 40cm. i) using formulas, calculate the distance to the image. ii) calculate the image height.

iii) find the magnification factor.
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21d

Combinatorics problem
There are 3 parks to clean and the cleaning takes 2 days. How many different ways there are to schedule the cleaning, if it needs to be done during the first 5 days of the week.
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23d

How do I find out which of the two molecules are the limiting reagent for synthesising azo dye? (Dimethylaninline or diazonium salt)
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24d

Innate immunity is considered as non-specific immunity because ___.
Innate immunity is considered as non-specific immunity because ___.A. They treat all pathogens in the same way. B. Innate immunity respond to a specific pathogen at a time. C. Innate is also called... more
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26d

What types of substances accept protons in certain reactions?
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26d

What types of substances accept protons in certain reactions?
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26d

What types of substances donate protons in certain reactions?
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26d

Compare the concentration [H+] of a solution with a pH of 2 to a solution with a pH of 4
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Science Chemistry

26d

Determine the concentration [H+] of a substance with a pH of 12
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26d

A hypothetical material has a relative permeability and relative permittivity of 3.0 and 4.0, respectively.

A hypothetical material has a relative permeability and relative permittivity of 3.0 and 4.0, respectively. a. What is the speed of light in this material? b. What is the value of the magnetic... more
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