4,347 Answered Questions for the topic Science

Science Math Physics

01/13/21

what is the tangential acceleration of a point on the edge of the pulley?
A pulley with a radius of 7.7 cm has a moment of inertia of 3 kg*m2. If the net torque acting on the pulley is 8 N*m, what is the tangential acceleration of a point on the edge of the pulley?
Follows • 1
Expert Answers •1

01/13/21

Chemistry weak bases
Trimethylamine, (CH3) 3N is a weak base (Kb = 6.3 × 10–5). What volume of this gas, measured at STP, must be dissolved in 2.5 L of solution to give that solution a pOH of 2.50?
Follows • 2
Expert Answers •1
Science Math Physics

01/13/21

what is the angular acceleration of the pulley?
A pulley with a radius of 38 cm has a moment of inertia of 35.5 kg*m2. If the net torque acting on the pulley is 7 N*m, what is the angular acceleration of the pulley?
Follows • 1
Expert Answers •1

01/13/21

What does metabolic profiling study provide that is unique to the metabolomics alone and not to any other ''Omics'' ?
Follows • 1
Expert Answers •1
Science Math Chemistry

01/13/21

The rate of the reaction NO2 + CO → NO + CO2 depends only on the concentration of NO2. The following data were collected:
The rate of the reaction NO2 + CO → NO + CO2 depends only on the concentration of NO2. The following data were collected: Time (s) [NO2]0 (M) 0  0.500 1.20 x 103  0.444 3.00 x... more
Follows • 2
Expert Answers •1

01/12/21

Extraction blanks are essential within metabolomics experiments, which of the following statements are incorrect ?
A.) The extraction blanks are treated the same as the samples and undergo the same extraction procedureB.) The extraction blanks are used to identify artifacts such as plastic or solvent... more
Follows • 1
Expert Answers •1

01/12/21

Which of these is an advantage of in-gel electrophoresis compared to gel-free approaches (choose one answer) ?
A.) Allows the type of protein modification to be identifiedB.) It is more sensitiveC.) Allows a greater range of proteins to be analyzedD.) Intract proteins allow detection of changes in protein... more
Follows • 2
Expert Answers •1

01/12/21

Which of the answer(s) true ?
Which of the following is characteristic of the DNA methylation process ? Select one or ones that apply.A.) S-adenosyl methionine (SAM)B.) Histone acetyl transferases (HATs)C.) Histone deacetylases... more
Follows • 1
Expert Answers •1
Science Math Physics

01/12/21

Two cars are involved in a rear-end collision. A Hummer (m = 2500 kg) is traveling at 20 m/s when it hits a Smart Car (m = 1000 kg) that is stopped at a red light.
Two cars are involved in a rear-end collision. A Hummer (m = 2500 kg) is traveling at 20 m/s when it hits a Smart Car (m = 1000 kg) that is stopped at a red light. If the Hummer comes to rest, how... more
Follows • 1
Expert Answers •1
Science Math Physics

01/12/21

what is the magnitude and direction of the velocity of the baseball after it is hit?
A baseball pitcher throws a 0.25 kg ball at a speed of 50 m/s to the east. If the batter strikes the ball with a force of 175 N to the west for a duration of 0.15 seconds, what is the magnitude and... more
Follows • 1
Expert Answers •1
Science

01/12/21

What is the mass of object on earth if it has 400 N ?
Follows • 1
Expert Answers •1

01/11/21

Angular Kinematics
Hello, I am struggling in my science class and I'm not sure how to do the unit we are on so I was wondering if someone could give me the answers and how to solve them so I can do better. Thank you!... more
Follows • 2
Expert Answers •1

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
Follows • 2
Expert Answers •2

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
Follows • 1
Expert Answers •1
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
Follows • 1
Expert Answers •1

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)
Follows • 1
Expert Answers •1
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
Follows • 2
Expert Answers •1

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?
Follows • 1
Expert Answers •1

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
Follows • 1
Expert Answers •1
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?
Follows • 1
Expert Answers •1

01/08/21

Which of the following has the greatest effect on the gravitational force between two objects?
A. Gravitational constantB. Distance between objects
Follows • 1
Expert Answers •2

01/08/21

Which of the following has the greatest effect on the gravitational force between two objects?
A. Gravitational constantB. Distance between objects
Follows • 1
Expert Answers •2

01/08/21

Which of the following has the greatest effect on the gravitational force between two objects?
A. Gravitational constantB. Distance between objects
Follows • 1
Expert Answers •1

01/08/21

Which of the following has the greatest effect on the gravitational force between two objects?
A. Gravitational constantB. Distance between objects
Follows • 1
Expert Answers •1

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
Follows • 2
Expert Answers •1

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.