12/17/21

Chemistry Question
1 In collig‎ative pro‎perties, the un‎it of co‎ncentration that is em‎ployed is _________, which is nu‎mber of m‎oles of solute p‎er ________.a. Molal‎ity, liter sol‎ventb. Mo‎larity, liter... more
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12/16/21

What is the missing particle
_________________ 
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12/16/21

How to get van't Hoff Factor and Freezing Point
Kf (°C/m) of water 1.86 Freezing Point of Water, °C 0.00 SOLVENT 100.0 g water Mass / Volume added Added reagent Molecular Weight van't Hoff Factor m Freezing Point 20.0... more
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12/15/21

A GPS satellite orbits at an altitude of 20,200 km above the surface of Earth. What is the speed of the satellite? (Recall that RE = 6.37 ✕ 106 m.)
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12/14/21

Newton’s Law of Cooling
Coffee is poured at 145ºF into a travel cup. After 25 minutes in a 70º room the coffee has cooled to 137ºF. I accidentally left the coffee on the counter when I left. What is the temperature after... more
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12/14/21

Logistic growth (with carrying capacity) differential equation (which version?)
Hello,I've come across two versions of the logistic growth differential equation with carrying capacity and they don't seem to be equivalent.The version I've seen most often (including on Khan... more
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12/13/21

Could anyone help me with part b of this physics question? I'm just confused what equation I should use for part b to find energy transfer. Any help ASAP would be very much appreciated!
The photograph shows a 'quiet boil' electric kettle. The makers of the kettle claim that it boils water with much less noise than a standard kettle. A laboratory technician takes some measurements... more
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12/13/21

Newtons law Physics problem
A father is pulling his child on a sled in the snow. According to Newton’s Third Law, the force the father exerts on the sled is equal to the force the sled exerts on the father but opposite in... more
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12/12/21

partial dervative
Find the indicated first order partial derivative.f-y(x,y) if f(x,y)=4x^2-3xy^2+4xy-3y^2+6
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12/12/21

Chemistry Questions
What do most of the rocks and minerals in the Earth’s crust consist of? Give an example.Definition of ionic compound?What does the chemical formula of an ionic compound represent? What is the name... more
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12/12/21

How many moles of CO2 are produced from 15.6 grams of NaHCO3?
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12/12/21

Conservation of Momentum
A 150 kilogram astronaut in his space suit throws away a 3.0 kg wrench at a velocity of 8 cm/sec. What is his resulting velocity?
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12/11/21

The table below shows the masses and maximum accelerations of four different antique cars. Write down the names of the four cars in order of increasing driving force.
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12/11/21

Estimate the value of the quantity.
Estimate the value of the quantity.A swimming pool has a leak. The leak is getting worse. The following table gives the leak rate every 6 hours.TIME (HR) LEAKAGE (GAL/HR)0 06 .512 .718 1.124 2.430... more
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12/11/21

problem number 2
Problem 2: What is the complete rate law equation for the overall reaction described by the elementary equations seen below. Assume that the rate constant for the overall reaction is 1400 mol L-1... more
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12/10/21

Use Newton's method to approximate a root of the equation 4 x^7 + 2 x^4 + 4 = 0 as follows. Let x _1 = 3 be the initial approximation. Carry at least 4 decimal places through your calculations.
Use Newton's method to approximate a root of the equation 4x^7+2x^4+4=0 as follows.Let x_1=3 be the initial approximation.The second approximation x_2 is and the third approximation x_3 is    Carry... more
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12/10/21

At the big New Year's Eve gala, a giant crystal ball descends at midnight at a rate of 3 meters per minutes. A party-goer stands and watches from 5 meters away (horizontally).

Question a. Find the rate of change of the (diagonal) distance between the party-goer and the crystal ball when the crystal ball is 12 meters off the ground. Question b. Find the rate of change of... more
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12/10/21

What is the solution of the system ? Solve using matrices

{ x + 2y = 9 { x + y = 1
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12/09/21

Graph the function f ( x ) = (1/5^x on the axes below
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12/09/21

which phase change is exothermic
which phase change is exothermic
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12/09/21

Substitution. Consider the integral
HELP PLEASE! a) Evaluate the integral by making the substitution b) Evaluate the integral by making the substitution c) Use the identity to rewrite the integrand and then evaluate the integral by... more
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12/09/21

Statistics Problem

A group of foreign students formed a club. In total there were 12 Germans, 8 French, 6 Spanish and 6 Italian. A team of 5 students was going to be randomly selected to participate in a University... more
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12/09/21

AP Chem solubility and precipitation
Predict whether each of the following compounds is soluble or insoluble in water.a. Magnesium phosphateb. Silver nitratec. Iron (lll) hydroxide d. NH4Bre. Li2CO3
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12/09/21

Using Taylor’s formula to find the quadratic and cubic approximations of the function 𝑓 (𝑥, 𝑦) = 𝑒 𝑥 cos 𝑦 at the origin.
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12/09/21

Estimation Error. The definite integral below can be computed using the Fundamental Theorem of Calculus. Calculate the actual value and then fill in the table with the given estimates and errors.
Exact value =In the table below, use the midpoint estimate with n rectangles, and use for the error column. Write the error in scientific notation using two significant digits.What is the... more
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