05/10/22

34% of people have a virus. 11 are picked at random. Find probability 3 are carriers
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05/10/22

NEED HELP PLEASEEEE
Identify the factors that affect the reaction given below.A. Temperature B. Surface Area C. Concentration D. CatalystsCooking food using pressure cooker, the high pressure can increase the... more
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05/10/22

Elipse word problem, Very confusing
The distance of Amateru from its star, epsilon Tauri, ranges from  million mi to  million mi. Find the equation of its elliptical orbit where the star is one of the foci. Assume that the center is... more
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05/08/22

Considering the respective partial pressures, what is the free energy for this reaction?
At 1120 K, ∆G° = 69.3 kJ/mol for the reaction 3 A (g) + B (g) →2 C (g). If the partial pressures of A, B, and C are 11.5 atm, 8.60 atm, and 0.510 atm respectively, what is the free energy for this... more
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05/08/22

speed of a satellite
Find the speed of a satellite in a circular orbit around the Earth with a radius 3.89 times the mean radius of the Earth; RE= 6.37·103 km ME= 5.98·1024 kg
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05/07/22

Can someone please answer this question

An inflated basketball is left outside. Over the winter, which of the following must decrease? Temperature inside the ball Mass of the ball Volume of the ball Pressure exerted on the ball from the... more
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05/07/22

Why is the dissociation of Hg2Br2 not 2Hg2+ and 2Br-?
I read that it is expressed as: Hg2Br2(s) ⇌ Hg22+(aq) + 2Br¯(aq)Why is there not a 2 in front of the Hg?
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05/07/22

Please derive how 1ml = 1g. Also, is ml the unit of volume?

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05/06/22

Algebra 2 and it’s “express the product of 6-2i and its conjugate in simplest form
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05/06/22

calculate the theoretical yield
calculate the theoretical yield of silver if you started with 115.4g of silver nitrate and unlimited amounts of calcium?
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05/05/22

Please help chem question

If the density of solid tungsten is 19.3 g/cm3 , what is the packing efficiency of W if it adopts a body‑centered cubic unit cell? The molar mass of W is 183.84 g/mol .
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05/05/22

Optimization Help and explanation
A Norman window is shaped like a rectangle with a semicircle on top of it. A carpenter has 10m of wood trim and wishes to cover the sides of the rectangle and the upper part of the semicircle.... more
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05/04/22

How can the laboratory technician combine a batch of an acid solution that is pure acid with another that is 10​% to get the desired concentration?
A laboratory technician needs to make a 42​-liter batch of a 40​% acid solution. How can the laboratory technician combine a batch of an acid solution that is pure acid with another that is 10​% to... more
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05/04/22

centripetal motion (FC)
The law has for 4 shapesF(c)= m.a(c)Fc=m×4π²r /T². (He He squared the law for the circumference of a circle so why is it r and not r²)F(c)= m v²/r. F(c)= m.4π² r . f². (Why it's... more
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05/03/22

You pull a 70-kg crate at an angle of 30° above the horizontal. If you pull with a force of 600N and the coefficient of kinetic friction is .4, how far will it move in 3 seconds?

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05/03/22

If q1 and q2 have the same charge of 60 µC with a magnitude of the force between them is 500 N, what is the distance separated these two charges?
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05/03/22

A buoy floating on a lake is seen to rise and fall 20 times in a minute. What is the frequency with which the buoy oscillates?
A buoy floating on a lake is seen to rise and fall 20 times in a minute. What is the frequency with which the buoy oscillates?What is the period of motion?If water waves on the lake are traveling... more
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05/03/22

Predominant chemical form and concentration of chromium
How do I find the concentration and predominant chemical form of chromium in a solution at pH6 and at pH8 with a 10^-4 molar of chromic acid H2CrO4? H2CrO4 pKa1 is 0.20 and pKa2 is 6.5
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05/02/22

integral problem
The velocity function is v(t)=t2−3t+2 for a particle moving along a line. Find the displacement and the distance traveled by the particle during the time interval [−3,6].displacement = ??distance... more
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05/02/22

Rotational Motion/angular acceleration

A barrel ride at an amusement parkis turning 2.30 rad/s when it startsto slow down. After making 5.00revolutions, it is rotating at1.11 rad/s. How much time didthat take?(Unit = s)can someone... more
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05/02/22

Physics Friction Problem
An 84.7 cross country skier on snow has a coefficient of friction = 0.131. With how much force must he push to move at constant speed?
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05/01/22

I’m attempting to sketch the graph of the following question, how would I answer the interval chart steps below?

Info:the interval is for the following function, y = cos(2x) —————- 3-2sin2(x) I’m sketching the graph of it dy/dx can only be positive or negative slope can only be up or... more
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05/01/22

HELP w daltons law plss
A Gas mixture containing 32.9 kPa total pressure is composed of Hydrogen, Oxygen, and Nitrogen gas. If Po= 0.0652 atm and Pn= 172.6 mm Hg. What is the partial pressure of Hydrogen (PH)?
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04/30/22

If a 8 sided fair die that is numbered 1 to 8 is rolled once, find the probability of getting: (a) a number that is less than 2 OR at least 6, (b) a number less than 2 AND at least 6, (c) an even #

please give an explanation rather than just an answer. I'm trying to learn the material as well :)
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04/29/22

May I get help on this please
Calculate the equilibrium constant, K for the reaction shown at 25 degrees CFe3+(aq)+B(s)+6H2O(l)⟶Fe(s)+H3BO3(s)+3H3O+(aq)The balanced reduction half‑reactions for the equation and their respective... more
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