1,750 Answered Questions for the topic Science

2h

A 9 N horizontal force is needed to keep an object that weighs 4 N moving at a constant speed. What is the magnitude of the frictional force acting on the object?

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2h

Driving down the highway you see a truck that has a mass of 2,569 kg. If you are told the force of friction is 2,325 N, what is the coefficient of friction?

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2h

A 34 N horizontal force is needed to keep an object that weighs 232 N moving at a constant speed. What is the coefficient of kinetic friction between the object and the surface?
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17h

Action potential

In order for an action potential to be produced at the axon hillock, what has to first happen?A. Sodium ion channels must be inactivated B. ESPS(Excitatory postsynaptic potential) had to have... more
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1d

I need help answering questions about Newton’s laws
1) under what conditions will a smaller vehicle have a greater momentum than a larger vehicle?2) which requires more force to overcome static or sliding friction.3)what are the variables in... more
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1d

Chemistry- I really did help
If you have 5.40grams of potassium (K) solid how many grams of potassium hydroxide (KOH) can be produced? _2__K(s) + _2__H2O(l) 🡪 _2__KOH(aq) + ___H2 (g)If 0.251moles of H2O gas are produced, how... more
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1d

A 41.8 kg box rests on a ramp with a slope of 60 degrees. Find the force of friction acting on the box.
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2d

Physics forces problem

A block of mass m1 is attached to a cord of length L1, which is fixed at one end (in the center of the circular trajectory). The block moves in a horizontal circle on a frictionless table. A... more
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2d

When a horse pulls a 88 kg buggy down the road with a force of 64 N, the buggy makes an angle of 35 degrees above the horizontal. Neglecting friction, whats the magnitude of the buggy's acceleration?
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3d

How is a balanced chemical equation similar to a recipe? Explain and give examples.
Please explain it clearly for me. I really need help.
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4d

a horse pulls a 68 kg buggy down the road with a force of 57 N, the buggy makes an angle of 25 degrees above the horizontal. If the force of friction on the buggy is 4 N, what is the acceleration?

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4d

How to determine the molecular weight of a pure substance
Can you do it in four steps.
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4d

thanks for the help with chem
thanks for the help, i appreciate it 
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5d

I need help please
Draw a diagram to illustrate or describe in words the cycle(s) of matter within the healthy lake. 
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5d

science question 1
Suppose the ability to edit RNA is a dominant trait. A male squid with two dominant alleles for RNA editing sexually reproduces with a female squid that has two recessive alleles for RNA editing.... more
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8d

LOOKING FOR A HELPFUL TUTOR
Data from a spectrophotometric assay of a purified recombinant hyaluronidase enzyme, Spy05783, against p-nitrophenyl N-acetyl-β-glucosaminide substrate (total reaction volume, 2 mL; volume of... more
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8d

what kind of energy does a piece of radioactive metal have?

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8d

Scientific Method vs scientific inquiry
What is the difference between scientific method and scientific inquiry, why is one better than the other?
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8d

pertains to fungi
Select what pertains to fungi. All fungi have or form true hyphae. Fungi are heterotrophic with most being saprobic. Fungal spores are for resistance and survival. They can tolerate harsh... more
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8d

DNA replication
Which of the following pertain only to the lagging strand during DNA replication? Select all relevant choices. Has only one primer. Will have several Okazaki fragments. New nucleotides are... more
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8d

microbiology study
Which of the following is false? Select all the false choices. Translation takes place on ribosomes in the nucleus. Three nucleotides code for three amino acids which is referred to as a... more
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8d

You have a blue rock with a volume of 15cm3 and a mass of 45 g. What is its density?
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8d

case study Infection
Both Zika and West Nile Infections have been in the news lately. Which of these two are most likely to be a serious problem for New Yorkers? Why? Explain in a well-thought of paragraph. Give... more
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9d

What is its average acceleration?
Average acceleration can be calculated as the change in velocity over the change in time. A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the... more
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9d

A basketball player jumping for a rebound is in the air for .24 seconds. How high did the player jump?

Free Fall Kinematic Equations which may help with this problem.Vf=Vi + 9.8*t d=Vi*t + .5*9.8*t2 Vf2 = Vi2 + 2*9.8*d d= [Vi + Vf]*t/2
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