4,374 Answered Questions for the topic Science

03/03/21

Calculate the rate of acceleration of a 2,500-kilogram truck if a force of 4,200 N is used to make it start moving forward?
Calculate the rate of acceleration of a 2,500-kilogram truck if a force of 4,200 N is used to make it start moving forward?
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Science Chemistry Chem

03/02/21

What is the molecularity of each of the elementary steps?
step 1:      Mo(CO)6 → Mo(CO)5 + CO    step 2:     Mo(CO)5 + L → Mo(CO)5La. Step 1 is unimolecular and step 2 is bimolecular.b. Step 1 is unimolecular and step 2 is unimolecular.c. Step 1 is... more
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03/01/21

In a lab, nitrogen trichloride is synthesized from its elements. This reaction has a 60.0% yield...
In a lab, nitrogen trichloride is synthesized from its elements. This reaction has a 60.0% yield. A chemist wants to prepare 50.0g of nitrogen trichloride, with a 60.0% yield, what mass of nitrogen... more
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02/28/21

Which statistical test shall I use?

I have two independent groups. Group A and B and for the study I have to determine which one is better. I determine this by seeing which of their observed values are closest to the expected value.... more
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Science Biology

02/27/21

Which protein will return back Na+ and K+ to their normal locations (K+ in and Na+ out)
A- Sodium and potassium leak channelsB- Sodium and potassium gated channelsC- Sodium-potassium pumpD- Sodium leak channel 
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Science Physics

02/27/21

1. A table sitting on the floor a. What is the action force? b. What is the reaction force? 2. A bowling ball striking a pin a. What is the action force? b. What is the reaction force?

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02/26/21

Sue travels 10 miles north, 3 miles east, 7 miles south, 2 miles west, 1 mile north, 1 mile west, and 4 miles south. a. Draw the motion. b. What is her displacement? c. What is her distance?
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Science Math History Reading

02/24/21

Which two sentences from the story best support the idea that Olly is not useful to Pops?
The story is Ted's Champion"
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02/24/21

please can i actually receive some help please
S   +   6 HNO3  -->  H2SO4  +  6 NO2  +   2 H2OIn the above equation how many moles of water can be made when 47 moles of HNO3 are consumed?Please give and only give explanation and solution.
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02/24/21

A 1.5 mol L-1 potassium hydroxide solution has a density of 1.33 g mL -1. What is the molality of the solution?
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02/24/21

physics question
A Chevy truck with mass of 1850 kg is rolling along a level roadway at +0.620 m/s. A rope is attached to the rear of the truck and Benjamin applies 265 N of force to the rope to stop the truck... more
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Science Math Physics

02/23/21

What is the acceleration of the block?
A 5 kg block experiences two external forces acting on it simultaneously. Force A has a magnitude of 5 N and points in the positive direction. Force B has a magnitude of 25 N and points in the... more
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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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