4,365 Answered Questions for the topic Science

10/24/20

How do I solve this Physics question please?
A raindrop of mass 3.46  10-5 kg falls vertically at constant speed under the influence of gravity and air resistance. Model the drop as a particle.(a) As it falls 80 m, what is the work done on... more
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10/24/20

The emission spectrum from atoms and molecules
a. Occurs only in the visible region of the electromagnetic spectrumb. Is a discrete spectrum that is unique to each atom or moleculec. Is a continuous spectrumd. Is a descrete spectrum that is the... more
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10/24/20

The value of ni if the observed wavelength is 657 nm is
The value of ni if the observed wavelength is 657 nm isa. 4b. 2c. 5d. 3 I think the answer is b. 2, since 657 nm is part of the Balmer Series (to n=2)
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10/23/20

Physics question
1. if during a 60 second jog, my average velocity is 5 m/s, how far from my starting point do i end up(what is my displacement ) in meters
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10/23/20

Please help me thx u
Baking soda is a white powder used for baking or cleaning. When you mix baking soda, NaHCO3, with vinegar, C2H4O2, you get a clear colorless liquid and bubbles of CO2. Specify the phase of each of... more
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Science Python

10/23/20

Neural network on categorization of animals using python
I want to know how young children categorize animals. What features (colour, amount of legs, etc) are they using to identify what the animal is. For example, if they were exposed to a white dog... more
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10/22/20

Pharmacology Question About Treating Patients

Elderly patients specifically commonly have multiple comorbidities. What role does a broad understanding of pharmacology have in helping you care for the patients you will be treating?
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10/22/20

calorimeter experiment
when learning about coffee-cup calorimetry, i have 3 questions regarding it that have been making me a bit confused.when using a coffee-cup calorimeter in an experiment, why is it important to... more
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10/21/20

coffee-cup calorimeter
When doing an experiment using a coffee-cup calorimeter, NaOH, and Acetic Acid: If some heat was lost to or gained from the surroundings what would happen to the measured ΔT? How does this affect... more
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Science Biology

10/21/20

What type of cell are bacteria
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10/21/20

URGENT HELP PHYSICS CART
In the physics lab, a cart of mass m1 = 0.30 kg moves with velocity v1 = 2.5 m/s on a frictionless track. It collides with another cart of mass m2 = 0.40 kg, which is initially stationary. The... more
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10/21/20

Oxidative Phosphorylation?
Can someone explain the following items in the context of oxidative phosphorylation, along with explaining the process? Mitochondrial matrix Intermembrane space Inner mitochondrial membrane NADH... more
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Science Research

10/19/20

How to eliminate lurking variables.
I'm conducting my first research study. I'm creating a form that applicants fill out online. I'm having a hard time figuring out how I can eliminate lurking variables.I read this article that said... more
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10/18/20

What are your strengths?
Has a teacher, parent or fellow student ever complpimented you on a strength or quality about yourself? Please share.
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Science Geography

10/17/20

why do we ignore climate change? why do people ignore the science behind it?
it’s a question that’s stuck in my brain for a while and i don’t know how to answer it.
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10/17/20

Percent Yield of Carbon Dioxide?
Liquid octane CH3CH26CH3 reacts with gaseous oxygen gas O2 to produce gaseous carbon dioxide CO2and gaseous water H2O. If 46.1g of carbon dioxide is produced from the reaction of 63.97g of octane... more
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10/17/20

percent yield of water
Aqueous hydrochloric acid HCl reacts with solid sodium hydroxide NaOH to produce aqueous sodium chloride NaCl and liquid water H2O. If 0.321g of water is produced from the reaction of 2.9g of... more
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10/17/20

temperature change
If the volume of  and NaOH were kept at 50 mL but the concentration was doubled to 2 M, the observed temperature change woulda. doubleb. halfc. be the samed. don't know
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10/17/20

Measured Temperature Change
If the volume of  and NaOH is doubled (100 mL) while keeping the concentration the same (1 M), the measured temperature change will beaDouble since more mols are reactingbSame since both qsol and... more
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10/17/20

What is the enthalpy change for this reaction?
When 50 mL of 1.00 M  was added to 50 mL of 1.00 M NaOH in a coffee-cup calorimeter, the temperature of the resulting solution increased by 4.5 . The enthalpy change for the neutralization isa.... more
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10/17/20

Find the DeltaH?
What is ΔHneut when 50.0 mL of 1.0 M HCl react with 40.0 mL of 1.0 M NaOH to produce a temperature change of +5.6 ? ​[math] d{soln} = 1.05 g/mL, c{sol} = 4.20 J/g. K
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Science Cell Theory

10/16/20

Are all living things made up of cells
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10/16/20

Physics, 5 questions

1. The force of a surface pushing back on an object is called the _____ force?a. gravityb. normalc. tensiond. friction2. the force of a rope, string, or similar object pulling on an object is... more
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10/16/20

Coffee-Cup calorimeter? Please check my answer! :)
When a neutralization reaction is carried out in a coffee-cup calorimeter, the temperature of the solution after reaction, Tf, would beaCannot determinebLowercThe... more
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10/16/20

Temperature reading.
You will be performing your experiment in a coffee-cup calorimeter and measure temperature changes upon reaction in the calorimeter. Given that ΔHneut = -56 kJ/mol, for a neutralization reaction of... more
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