4,374 Answered Questions for the topic Science

01/11/21

AP Physics Question about gravitational field
Two planets P1 and P2 orbit around a star S in circular orbits with speeds v1 = 45.8 km/s, and v2 = 56.8 km/s respectively.(a) If the period of the first planet P1 is 740 years what is the mass, in... more
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01/09/21

physics question
A physics student ridges Seattle's Big Wheel Ferris Wheel in a vertical circle with a radius of 22 m. The wheel malfunctions and starts going at a very fast, but constant speed. If the physics... more
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Science Mind Brain Thinking

01/09/21

Does “thinking” not include all mental activity?
Is this accurate?Mental speech and using your imagination to picture things are included in mental activity. When someone tells you “Think about it.”, you don’t have to use mental speech to do it.... more
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01/09/21

physics question
A phonograph record with a diameter of 30.0 cm rotates 33.5 times per minute.What is the velocity of a point on its rim? (answer is 0.527 but I keep getting it wrong)
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Science Chemistry

01/08/21

Some chemistry questions
How many molecules of NH_4NO_3 are there in 20grams of NH_4NO_3? What is the mass in grams of a sample of H_3PO_4 if it contains 1.39x10^23 molecules? A sample of MgCl_2 contains 9.74x10^23... more
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01/08/21

physics question
An 8.5 kg cat runs in a circle that is 0.4 m in radius at a velocity of 4.0 m/s. Calculate the centripetal force on the cat. What type of force is providing the centripetal force on the cat?
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01/08/21

Physics question
A 2000. kg car is rounding a curve of radius 200. m on a level road.  At a velocity of 20.0m/s the car starts to slide on the pavement.   What is the static coefficient of friction (µs ) between... more
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Science Math Physics

01/08/21

A 56 kilogram student climbs a ladder in 8.0 seconds. The total work done against gravity by the student during the climb is 2115 Joules.
Approximately, how high is the ladder?
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01/08/21

Which of the following has the greatest effect on the gravitational force between two objects?
A. Gravitational constantB. Distance between objects
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01/08/21

Which of the following has the greatest effect on the gravitational force between two objects?
A. Gravitational constantB. Distance between objects
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01/08/21

Which of the following has the greatest effect on the gravitational force between two objects?
A. Gravitational constantB. Distance between objects
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01/08/21

Which of the following has the greatest effect on the gravitational force between two objects?
A. Gravitational constantB. Distance between objects
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01/08/21

10 anatomy questions

what might a developmental anatomist study?differences in athletest raining at age 18 and age 50how the body decays after deaththe bodys reaction to cold temperatureshow genetic cose is passed down... more
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01/07/21

Physics question
What is the minimum radius at which an airplane flying at 300. m/s can make a U-turn if its centripetal acceleration is NOT to exceed 4 g’s (1g = 9.8m/s2)?
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01/06/21

Question about epigenetics

Q1. Epigenetics is defined as ‘Changes to the genome which are inherited from one generation to the next which alter _____ _____ but do not involve changes in the ____ _____’.1. gene sequence;... more
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01/06/21

create a paragraph for science class using these words

use the words that are bolded the rest is the meaning Element- a substance with atoms that are all alikeMatter- Anything that has mass and takes up space Solid- state of matter that has a definite... more
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01/05/21

How to answer this question ?
Dave's serum was analysed by capillary zone electrophoresis with a UV detector set at 210nm and a large potential paraprotein was seen (shaded in panel A). Subsequent immunofixation studies (not... more
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01/05/21

Chemistry Word Problem #2. Please help asap!
The optimal level of fluoride in drinking water suggested by the World Health Organization in 1994 is between 0.5mg/L and 1.0mg/L. How many moles of sodium fluoride would have to be added to pure... more
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01/05/21

just need some help
What is the molarity concentration of sucrose in this sports drink?Molarity =            ( note: 1,000g of water-based fluids = 1 L )
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01/05/21

need some more help
If this sugar was all sucrose (C12H22O11), how many moles of sucrose sugar is in 100g of this sports drink?
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01/05/21

need some help with this
What is the molarity concentration of potassium chloride in this sports drink?Molarity =            ( note: 1,000g of water-based fluids = 1 L )
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01/05/21

i need some help with math
I have a box of M&M bags. Each bag contains 25 M&Ms and are 20% red, 20% brown, 16% yellow, 16% blue, 16% orange, and 12% green.Jenna needs to collect green M&Ms for a special... more
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12/31/20

physics question?
Sreshta is in her Lamborghini and trying to make a turn off a highway at 19.0 m/s. The turning radius of the curve is 35.0 m. Her car has a mass of 1240 kg.Determine the minimum coefficient of... more
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12/31/20

physics question
In an effort to rev up her class, Ms. Player does a demonstration with a bucket of water that has a total mass of 1.8 kg. Ms. Player whirls the bucket in a vertical circle, of radius 1.3 m, such... more
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12/30/20

Ventilation I:E Ratio Math Problem
If a patient's F = 12 and has a two second inspiration, his I:E ratio is?
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