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1d

Finding expression for magnitude with forces

Two forces are applied to an object with mass m = 5.25 kg and the resulting acceleration is ay = 2.09 m/s2 in the positive y direction with no acceleration in the x direction. One of the two forces... more

How do you solve this word problem using unit analysis?

To get to Denver, Colorado, Ms. B needs to drive a total of 913 miles. If she drives at an average speed of 60mph for 6 1/2 hours before stopping for gas, how many more miles does she need to drive?

Chemistry Lab Question

Assume that you carried out today’s reaction, but didn’t measure the masses of either the KClO3 starting material or the KCl product. However, you were able to determine that 0.65L of O2 gas was... more

Chemistry Lab Question

Assuming the same sort of reaction occurs (ie: release of O2), write the balanced equations for the decomposition of Potassium Hypochlorite, Sodium Chlorite, and Lithium Perbromate.

phase change energetics

The following information is given for ether, C2H5OC2H5, at 1 atm: boiling point = 34.6 °C Hvap(34.6 °C) = 26.5 kJ/mol melting point = -116 °C Hfus(-116 °C) = 7.27 kJ/mol specific heat... more

Phase change energetics

The following information is given for mercury, Hg, at 1 atm: boiling point = 357 °C Hvap(357 °C) = 59.3 kJ/mol melting point = -38.9 °C Hfus(-38.9 °C) = 2.33 kJ/mol specific heat... more

Phase Change Energetics

The following information is given for iron at 1 atm: boiling point = 2750 °C Hvap(2750 °C) = 354 kJ/mol melting point = 1535 °C Hfus(1535 °C) = 16.2 kJ/mol specific heat solid... more

phase change energetics

The following information is given for mercury, Hg, at 1 atm: boiling point = 357 °C Hvap(357 °C) = 59.3 kJ/mol melting point = -38.9 °C Hfus(-38.9 °C) = 2.33 kJ/mol specific heat... more

Thermal equilibrium

In the laboratory a student determines the specific heat of a metal.He heats 18.7 grams of nickel to 98.36 °C and then drops it into an insulated cup containing 81.2 grams of water at 21.50 °C.... more

Thermal equilibrium

A chunk of aluminum weighing 18.5 grams and originally at 98.95 °C is dropped into an insulated cup containing 77.6 grams of water at 21.43 °C.Assuming that all of the heat is transferred to the... more

Trigonometry word problem

At 6 a.m., the angle of elevation of the sun from the horizon is 0 degrees. At noon, the angle of elevation of the sun is 87 degrees. At some time before noon, a flagpole 50 feet tall casts a... more

Specific Heat to Energy Temperature(pls help)!!

A sample of gaseous hydrogen is heated with an electrical coil. If 2.58×103 Joules of energy are added to a 11.8 gram sample initially at 21.0 °C, what is the final temperature of the hydrogen?What... more

Trigonometry word problem

A bookcase fits diagonally into the corner of a room. The front of the bookcase is 54 inches wide. Each side of the bookcase uses the same amount of wall space.  What angles are formed where the... more

Calculus Integration by Parts

Which of these integrals requires the method of integration by parts? (4 points)Answer Choices:

Calculus Integrals

Find the range of the function  . (4 points)Answer Choices: [-4, 4] [-4, 0] [0, 4π] [0, 8π]

Calculus Integral Functions

Pumping stations deliver gasoline at the rate modeled by the function D, given by  with t measure in hours and and R(t) measured in gallons per hour. How much oil will the pumping stations deliver... more

Consider the following function

Consider the function f(x) = x^2/(8(x^2)+3)List the x values of the inflection points of f. If there are no inflection points, enter 'NONE'.

Probabilty Question: Color of the Marble

Mr.W puts two blue marbles and one green marble into his pocket. Then he randomly takes out one. After recording the color of the marble, he puts the marble back. He repeats this 6 times. a.What is... more

Write a linear function $f$ with $f\left(5\right)=-1$ and $f\left(0\right)=-5$ .

Can you please solve this for me. I am so confused right now...

1d

Help with physics center of mass

Four particles are placed in the following configuration: a 7.0 kg particle placed at the location (1.0 m, 2.0 m), a 3.0 kg particle placed at (-2.0 m, 1.0 m), and a 4.0 kg particle placed at (3.0... more

Write a linear function $f$ with $f\left(0\right)=7$ and $f\left(3\right)=1$ .

Can you please solve this problem for me. I am so confused right now...
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