1,923 Questions for the topic Science
Imagine a surface with a bacteria population growing on it. Every day, the number of bacteria in the population doubles. After 16 days, half of the entire surface is covered in bacteria. On what... more
Are sound waves just graphs of sine and cosine?
Then how would you graph a sound wave? With the sine and cosine graphs? Then would that equation be like the sine and cosine graphs equations?
Light as a Wave
We know the light is a form of a wave. We also know wave requires a medium for its propagation. If the light is a form of a wave, then how does it travel in a vacuum, which is not a medium?
Hot or Cold Beverages
so lately ive been in a debate on weather if you drink hot water with high calorie food, you’ll loose more weight then if you drink a cold beverage where the food becomes cold in your body and... more
Which of the following solutions of strong electrolytes contains the largest number of ions?
50.0 mL of .175 M NaOH, 100.0 mL of .250 M BaCl2, or 250.0 mL of .050 M Na3PO4?I would really appreciate if you could explain what to do in order to determine which solution contains the most... more
What should be the transmission band width of an FM signal with 75 KHz deviation and highest frequency of modulation is 15 KHz?
Assuming that the earth re-emits all the radiations it receives from the sum, determine its temperature, (For earth, E = 1.39 × 103 w/m2 , Stefan’s constant. = σ = 5.735 × 10-8 w/m2 k4 )
While solving kinematics problem for the motion of an object, a student obtained the following result: a = k –bv, where, a is acceleration, v is speed and k and b are positive constant. Given that... more
If vector(a+b+c=0) the angle between vector(a and b) and vector(b and c) are 150° and 120° respectively. Then magnitude of vectors a b and c are in ratio.
How do animals use coloring and behavior to avoid predators? How are the various types of coloring and mimicry different from one another?
What if I can’t achieve a bachelor’s in Biology?? Help
Listen, I have wanted to go into the medical field my whole life. I know I will thrive in healthcare and that it is what I want to do; however, my issue is that I struggled with every single... more
83.6 mol of helium is confined to 14L vessel at a pressure of 8 atm. What is average kinetic energy of a helium molecule of mass 5.34×10^−26 kg.
Boltz's constant is 1.38×10^−23 J/K,universal gas constant is 8.31 J/KAnswer in units of J.
A 615 mL gas sample at STP is compressed to a volume of 223 mL, and the temperature is increased to 21◦C. What is the new pressure of the gas in Pa? Answer in units of Pa
The pressure in an automobile tire is 2.6 atm at 280 K. Later the pressure gauge reads 1.93 atm. What is the new Celsius temperature of the air inside the tire?
A tank of volume 0.467 m^3 contains 3.93 mol of helium gas at 28 ◦C.The universal gas constant is 8.31451 J/Kmol, and Boltzmann’s constant is 1.38066 ×10^−23 J/K.
Find the total thermal energy of the system. Answer in units of J.
The volume of a gas is 11.8 mL at 49°C and .942 atm. What will the volume be at 17°C and 0.993 atm? Answer in units of mL
Stuck on this for a long time
Hello I was hoping someone could help me out with this question I have been practicing on:1. A pea plant with round seeds is crossed with a pea plant that has wrinkled seeds. For the cross,... more
How cold would a 263 calorie drink have to be for all the calories to be burned by the body regulating the temperature?
This is mostly hypothetical, as the actual temperature would probably be lethal to a human, but if a Human burns calories maintaining thermal homeostasis, one could assume that at some point, if... more
What cells or chemicals are involved in acute inflammation and immune response during infections?
When studying the physiology of the immune system and inflammation The cells involved are derived from the plasma portion of blood and the most common are neutrophils, NK cells, macrophages, T... more
What are covariate and cofounder variables
I need help finding the covariate and cofounder variables in the research paper i am looking at, or help learning how to find it, I have researched and tried to figure out what a cofounder and... more
Chem 111 help please
If 17.50mL of a NaOH solution is required to titrate a 0.4005g sample of KHP dissolved in 20mL of total solution volume, then what is the molarity of the sodium hydroxide solution? Thanks in advance!
Iron oxide reacts with aluminum to give aluminum oxide and iron. What kind of chemical reaction is this?
the answer can either be combustion, decomposition, replacement, or synthesis. And I didn’t really learn this and if I did I don’t remember doing this in class, can you please help me?.