# Posts by Roland

Total # Posts: 28

**electron theory and ohm law**

if the 5-ohm heater in problem 15 is placed with a 15-ohm heater, what current will the 15-ohm heater draw from the same power supply?

*November 25, 2015*

**electron theory and ohms law**

if the 5-ohm heater in problem 15 is placed with a 15-ohm heater, what current will the 15-ohm heater draw from the same power supply?

*November 25, 2015*

**electron theory and ohms law**

what voltage must be applied to a 6.4-ohm lamp filament to develop 20 amperes of current?

*November 25, 2015*

**Physics**

Calulate the acceleration of a 300,000kg jet on take when the thrust is equal to 120,000N. I used a = f/m to get 0.4m/s/s Tricky part. How long a runway is required for the plane to take off at a speed of 300km/h? Help?

*August 5, 2015*

**chem**

Thank you. That was a big help. My Dad is trying to help me but he's been out of college more then 30 years.

*February 4, 2015*

**chem**

A 5.2 litre baloon at 900 torr of pressure. If the temp is kept constant and the pressure is reduced to 200 torr what is the voume in the balloon? Is this a trick question? My instinct is to say the volume is the same, 5.2 litres.

*February 4, 2015*

**Africa**

I'm in grade 12 I want an advice about the subj that I chose maths lit,geography,life scinces,so which job I can take next year pls keep me up dated

*June 5, 2014*

**Calculus**

A company manufactures widgets. The daily marginal cost to produce x widgets is found to be C'(x) = 0.000009x^2 - 0.009x + 8 (measured in dollars per unit). The daily fixed costs are found to be $120. a. Use this information to get a general cost function for producing ...

*April 25, 2013*

**Calculus**

Part I The change in annual revenue in thousands of dollars for the Ozark Zip Line Corporation has been modeled by the function. R(x) = 8.2x^2 + 23.1x where x is the number of years after 2000. To find the total revenue gained between the years 2002 and 2005, start by choosing...

*April 24, 2013*

**Calculus**

Part I The change in annual revenue in thousands of dollars for the Ozark Zip Line Corporation has been modeled by the function. R(x) = 8.2x^2 + 23.1x where x is the number of years after 2000. To find the total revenue gained between the years 2002 and 2005, start by choosing...

*April 24, 2013*

**Calculus**

Part I The change in annual revenue in thousands of dollars for the Ozark Zip Line Corporation has been modeled by the function. R(x) = 8.2x^2 + 23.1x where x is the number of years after 2000. To find the total revenue gained between the years 2002 and 2005, start by choosing...

*April 22, 2013*

**Cosmology**

á less than −4

*January 16, 2013*

**Physics**

A rocket of total mass 3100 is traveling in outer space with a velocity of 120 . To alter its course by 40.0, its rockets can be fired briefly in a direction perpendicular to its original motion.

*November 27, 2012*

**Statistics**

find the standard deviation by substituting n= 147, p=0.13 and q=0.87

*February 6, 2012*

**accounting**

1,150,000 in cash. How long would it take them to accumulate $2,000,000 in cash? Assume an interest rate of 5 percent.

*November 28, 2011*

**science**

which of the following does not affect reaction rate balancin, temperature surface area or concentration?

*September 27, 2011*

**math**

how does a tally chart help you to display data?

*May 4, 2011*

**math**

if you spin the spinner 00 times will B be spun more times than A?

*May 4, 2011*

**physics**

4m/s

*December 7, 2010*

**7th grade science**

A car with a forward force of 2,000 newtons drives a distance of 20 kilometers in minutes. How much power does it have?

*November 7, 2010*

**Algebra**

-4 sqrt5 + 3 sqrt3

*April 4, 2008*

**Science**

why do we name lakes

*January 16, 2008*

**Science**

Why do we name rivers?

*January 16, 2008*

**windows server 2003**

**This question I don't understand**When you configure volume shadow copy, which of the following parameters cannot be configured?

*September 18, 2007*

**windows server 2003**

sorry for all the pots new to the site

*September 17, 2007*

**windows server 2003**

lol i have no idea

*September 17, 2007*

**windows server 2003**

**This question I don't understnad**If you do a full backup to a single tape on a Friday night and then an incremental backup to a single tape on all other days of the week (including the weekend), if a system failure occurs, what is the maximum number of tapes required to...

*September 17, 2007*

**math**

how do i find the precent. 12 of 170

*September 11, 2007*

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