4,347 Answered Questions for the topic Science

Science Chemistry

02/23/21

CHEMISTRY SCIENTIFIC NOTATION
Write the following numbers in scientific notation:1. 78000 grams =  x 10  2. 54.056 cubic meters =  x 10  3. .00650 hectoliters =  x 10  4. 100000 kiloseconds =  x 10  5. .000005 Megamoles =  x 10 
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02/22/21

Pathophysiology: Aortic Dissection vs. Thoracic Aortic Aneurysm
A 55-year-old man presents at the emergency department of his local hospital with complaints of excruciating, “ripping” pain in his upper back. He has a history of poorly controlled hypertension.... more
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02/22/21

Pendulum Physics

assuming the weight part of the pendulum has potential energy at the top and kinetic at the bottoma teacher with a mass of 90kg is swinging, he's acting as a pendulum, he is 2.5meters up a) what is... more
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Science Chemistry

02/22/21

How many moles of lactid acid (c3h6o3) are causing you pain?
One of the thinga that we should do to fight the virus is to have some exercises, during exercises, lactid acid (c3h6o3) forms in the muscle causing muscle cramp. If 5.0g of lactid acid (c3h6o3)... more
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Science Chemistry

02/22/21

During the Pandemic you love to cook sunny side up egg. To your curiosity you want to know how many moles are there in 3.01 x 10²³ molecules of table salt (NaCl) you put on the egg you cooked.
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02/22/21

physics question (i don't understand how to do this problem:( )
A proton of mass M collides obliquely with another proton. The first proton is moving with a speed of 6.0 x 106 m/s before it hits the second, stationary proton. Assuming the collision is perfectly... more
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02/22/21

physics question?
A frustrated physics student blew up her Physics textbook using a small amount of explosive. It broke into three pieces, which miraculously flew off in directions that were all in the same plane. A... more
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02/22/21

physics question
In an unsuccessful attempt to send a probe to Mars, the carrier vehicle with a total mass of 533 kg is moving horizontally at 3000 m/s when it explodes and breaks into two parts. One of the parts... more
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02/21/21

physics question
A steel ball of mass 10 kg moves due East at 5.0 m/s. It collides with a rubber ball of mass 5.0 kg moving at 10 m/s due North. After the collision the steel ball moves at an angle of 60° East of... more
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02/21/21

physics question
A 0.40 kg model airplane is traveling 20 km/h toward the south. A 0.50 kg model airplane traveling 25 km/h in a direction 20° east of south collides with the first model airplane. The two planes... more
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02/21/21

We want to calculate the concentrations of all species in a 0.36 M Na2SO3 (sodium sulfite) solution.

We want to calculate the concentrations of all species in a 0.36 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1=1.4×10−2 and Ka2=6.3×10−8. Let's start by... more
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02/20/21

copper (II) nitrogen (chemical equation help please!!!)
how do you write copper (II) nitrogen as a chemical equation? thanks!
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02/20/21

copper (II) chloride (chemical formula help!)
How do you write copper (II) chloride as a chemical formula?
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02/19/21

100.0 mL of 3.0 M HCl can be neutralized with exactly 200.0 mL of 1.5 M NaOH. If this reaction is done in a coffee cup calorimeter, what temperature change would you expect to observe?
100.0 mL of 3.0 M HCl can be neutralized with exactly 200.0 mL of 1.5 M NaOH. If this reaction is done in a coffee cup calorimeter, what temperature change would you expect to observe?
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Science Physics

02/18/21

Find the attractive Coulombic force
 A proton is located at x =1.0nm, y=0.0nm and an electron is located at x=0.0nm, y=4.0nm. Find the attractive Coulombic force between them. (k= 9x10^9Nm^2/C^2)
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Science Physics

02/18/21

What is the potential energy of this configuration?
Consider two charges q1= 0.2 u C and q2 = 3 u C that are 0.5m away from each other. What is the potential energy of this configuration?
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02/17/21

Doesn't fit here, it's in the description

Maisie made assumptions about genes when she made her calculations. What other factors could influence the genotypes and phenotypes for flower color and seed flavor of the offspring of a cross? Are... more
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02/17/21

What are the possible genotypes for flower color for each plant?
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Science Chemistry Chem

02/17/21

If 1.025 g of unknown solute is added to 4.568g of lauric acid and the sloution is found to have a molality of 1.81 m, How many moles of solute are in the solution?
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Science Chemistry Chem

02/17/21

If a solution of 1.00g of unknown solute is added to 9.116 g of steric acid and the solution freezes at 63.6 oC, What is the molality of the solution
( Normal FP steric acid = 68.88oC and Kf = 4.50 oC/m )
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Science Chemistry Chem

02/17/21

If 240 mL of an aqueous solution containing 1.67 g of an unknown covalent solid at 25oC gives rise to an osmotic pressure of 497 mmHg, what is the molar mass (g/mol) of the unknown?
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02/16/21

Identify blood and lymphatic disorders question
For each of the following characteristics, identify the blood or lymphatic disorder(s) in which they occur:NOTE: For most, I wrote down what I think occurs in these scenarios, I'm just wondering if... more
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02/16/21

A block with mass m1 = 0.450 kg is released from rest on a frictionless track at a distance h1 = 2.85 m above the top of a table.
A block with mass m1 = 0.450 kg is released from rest on a frictionless track at a distance h1 = 2.85 m above the top of a table. It then collides elastically with an object having... more
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02/16/21

An unstable nucleus of mass 1.7 ✕ 10−26 kg, initially at rest at the origin of a coordinate system, disintegrates into three particles.

An unstable nucleus of mass 1.7 ✕ 10−26 kg, initially at rest at the origin of a coordinate system, disintegrates into three particles. One particle, having a mass of m1 = 1.8 ✕ 10−27 kg, moves in... more
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02/15/21

Question about Pathophysiology and Anemia
A 65-year-old woman is seen in the clinic because of numbness in her lower legs and feet and difficulty walking. She has no other complaints. She takes a blood pressure pill, two calcium pills, and... more
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