08/03/20

This question was on my homework last week and I had trouble figuring out how to plug the variables in. Could anyone show me a step-by-step answer?
To start his lawn mower, Bob pulls on a cord that is wrapped around a pulley. The pulley has a moment of inertia about its central axis of I = 0.650 kgm2 and a radius of 5.40 cm. There is an... more
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07/30/20

what is the initial temperature of the tin?
A sample of solid tin is heated with an electrical coil. If 46.6 Joules of energy are added to a 14.5 gram sample and the final temperature is 39.8°C, what is the initial temperature of the tin?
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07/30/20

Use the Eigenvalue Method to solve the following system of ODES
Use the Eigenvalue Method to solve the following system of ODES:  Hint: The corresponding coefficient matrix has a pair of complex eigenvalues.
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07/29/20

The velocity function (in meters per second) is given for a particle moving along a line
v(t) = 3t − 8,    0 ≤ t ≤ 5(a) Find the displacement.=______m (b) Find the distance traveled by the particle during the given time interval.=_____ m
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07/29/20

Mean,mode,median
In a mathematics class half of the students scored 42 on an achievement test. With the exception of a few students who scored 78, The remaining students scored 53. Which of the following statements... more
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07/29/20

49.2 mol of helium is confined to a 19 L vessel at a pressure of 2 atm. Find the average kinetic energy of a helium molecule of mass 5.34 × 10−26 kg. Answer in units of J.
Boltzmann’s constant is 1.38 × 10−23 J/K, and the universal gas constant is 8.31 J/K.
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07/28/20

Gps satellites travel mid Earth orbits. If mid earth orbit is from 4077 to 26198 miles from the center of the earth, what is the domain and range function?
function is v= square root of 1.24 times 10^2 over r, where v is the velocity in miles per hour and r is the distance from the center of the earth in miles.
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07/28/20

Lanier review 30
you drive 252 miles and have 9 gallons of gas remaining in your tank. Then you continue driving, and calculate that after driving 318 miles you have 6 gallons left.What is your rate?   miles per... more
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07/28/20

A microwaveable cup-of-soup package needs to be constructed in the shape of cylinder to hold 300 cubic centimeters of soup.
A microwaveable cup-of-soup package needs to be constructed in the shape of cylinder to hold 300 cubic centimeters of soup. The sides and bottom of the container will be made of styrofoam costing... more
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07/28/20

Using the comparison test, how do I find the divergence of the series below?
infinityΣk=1 (1+1/k)k
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07/24/20

Which gives a larger discount on a $200 purchase: a discount of 20% followed by a discount of 35% OR a single discount of 50%?
Which gives a larger discount on a $200 purchase: a discount of 20% followed by a discount of 35% OR a single discount of 50%?
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07/24/20

Change the repeating decimal 0.453453453…. into a fraction.

Change the repeating decimal 0.453453453…. into a fraction.
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07/23/20

convex and concave mirrors

Help ASAP 3. List two practical uses for convex mirrors. 4. List two practical uses for concave mirrors.
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07/22/20

Please walk me through how to do this.
A pentagonal pyramid has a lateral area of 300 in2, where the perimeter of the base is 40 in. Determine slant height.
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07/22/20

If 52 grams of C2H4 is burned in the presence of 144 grams of oxygen, what is the % yield of the reaction if 90 grams of carbon dioxide is produced in the reaction?
For the following reaction:C2H4 + 3O2 —> 2H2O + 2CO2If 52 grams of C2H4 is burned in the presence of 144 grams of oxygen, what is the % yield of the reaction if 90 grams of carbon dioxide is... more
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07/22/20

A poster is to have an area of 210 in2 with 1 inch margins at the bottom and sides and a 2 inch margin at the top. Find the exact dimensions that will give the largest printed area.
width=_____height=_____
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07/22/20

Im not sure if im doing it right,
A 3.00 × 10^2 kg car is pushed from the top of a ramp. The ramp has a vertical height of 5.0 m and horizontal distance of 10.6 m. If the force applied along the incline is 5.00 × 10^2 N, what is... more
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07/22/20

A scientist isolated 3.621g of a gas. The sample occupies a volume of 975.8mL at 74.4 degrees Celsius and 97.0 kpa. Calculate the molar mass of the gas.show all work
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07/19/20

Find the value(s) of c such that the area of the region bounded by the parabolae y=x^2−c^2 and y = c^ 2 − x ^2 is 1944
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07/17/20

physics question
A small sphere with mass 2.10  hangs by a thread between two large parallel vertical plates  apart  The plates are insulating and have uniform surface charge densities  and . The charge on the... more
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07/16/20

How much chlorine will be in the fish tank when the tank is full?
You are setting up a new aquarium and have purchased a large fish tank can hold 160 liters of water. The tank is partially filled with 80 liters of tap water in which 200 milligrams of chlorine... more
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07/16/20

The solubility of sugar is 204 g/ 100 g water at 20 °C. How many grams of water are needed to dissolve 612 grams of sugar at the same temperature?
250 g400 g300 g350 g
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07/15/20

how long until the temperature in the bag is within four tenths of a degree of the temperature of the water?

While you are letting the filter remove more of the chlorine from the water, you are begin to acclimate your fish to the temperature of the water in the fish tank. In order to not shock the fish,... more
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07/09/20

Propagation of Error
I want to determine the error (confidence interval) in the average concentration of 3 physical samples. However, I have two measures of error that I would like to combine. 1) I calculated the... more
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07/08/20

Physics Question
A particle is moving with the given data. Find the position of the particle.v(t) = sin(t) − cos(t),    s(0) = 0What s(t)?
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