4,347 Answered Questions for the topic Science

Science Chemistry

03/07/21

How do you tell if something is solid/liquid/gas in a single and double displacement reaction?
I feel like I kind of know this but just wanted someone to answer so that I can know for sure; Thanks!
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03/07/21

Difference between aqueous and a liquid?

In the reaction sodium hydroxide+sulfuric acid, the balanced equation I got isNaOH(aq)+H2SO4(aq)-->Na2SO4+HOH or NaOH(aq)+H2SO4(aq)-->Na2SO4+H2OI don't understand how to write the net ionic... more
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03/07/21

Is sweat considered to be isotonic, hypertonic, or hypotonic?
Also, a patient lost 4000mL through sweat and drank 22500mL red bulls before going to work in the sun, and would his blood be considered isotonic,hypertonic,or hypotonic?
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03/07/21

Is human sweat considered to be hypertonic, hypotonic, or isotonic? (remaining follow up questions and more info under)
Patient reports urinating only once in the past 6 hours. Urine produced was very dark colored. Patient is irritable and confused (unsure of date, time or his location). Pulse 100 Respirations:... more
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Science

03/03/21

Science heat question
 A 1.9 kg piece of copper metal at 70.0°C is placed in water at 25.0°C. The final temperature of the water and copper was 26.8°C. How much water was there? (kg)[ c_copper = 385 J/(kg°C), c_water =... more
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03/03/21

Chemistry Homework! Combustion!
How many moles of carbon dioxide is produced by the complete combustion of 5 g of propane Convert this answer into grams
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03/03/21

Chemistry Homework! Combustion!
During combustion how many moles of oxygen are needed to react with 5 g of propane? Convert this answer into grams
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Science Physics

03/03/21

What is the Action vs reaction car sitting in the driveway and a dog pulling on a leash
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03/03/21

Either give me the answer or tell me how to find the answer, please. My grades are declining, my missing assignments are increasing, and I am falling apart.
PLEASE HELP ME WITH ALL MY QUESTIONS FOR SCIENCE!!!!
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03/03/21

What is the downward resultant force (weight) of a girl with a mass of 50 kilograms in a space station with an artificial gravity of 7 N/kg?

What is the downward resultant force (weight) of a girl with a mass of 50 kilograms in a space station with an artificial gravity of 7 N/kg?
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03/03/21

How much force is needed to accelerate a 62Kg skier at a rate of 1.2 m/sec2 across level ground? Assume that there is negligible friction between skis and snow covered ground.

How much force is needed to accelerate a 62Kg skier at a rate of 1.2 m/sec2 across level ground? Assume that there is negligible friction between skis and snow covered ground.
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03/03/21

What is the acceleration of a 5.8 kilogram bowling ball if a force of 12 N is applied to it?
What is the acceleration of a 5.8 kilogram bowling ball if a force of 12 N is applied to it?
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03/03/21

What is the mass of an object that needs a force of 4,300 N to accelerate it at a rate of 4 m/sec2
What is the mass of an object that needs a force of 4,300 N to accelerate it at a rate of 4 m/sec2
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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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