Sunday

January 22, 2017
Total # Posts: 15

**chemistry**

A reaction has a first order rate constant of 6.11x10-5 s-1 at 25C and 0.00221 s-1 at 85oC. What is the value of the rate constant at 63oC?

*June 14, 2016*

**Physics**

A circular dam has a radius of 10.0 m and a height of 3.0 m. Of the dam will be filled with water from a pipe with an inside diameter of 10 cm and a water flow of 10 litres per second, calculate the time taken to fill the dam to a point 10 cm from the top of the dam.

*April 4, 2016*

**Math**

A football is punted into the air and it's height is given by the equation, h(t)=-4.9t^2 + 24.5t + 1 a)how high is it after 1 second? b)how long does it take to reach it's max height? c)what is it's max height? d)how long does it take to hit the ground?

*October 12, 2015*

**Noun**

physics: pls!!!!! i need ur help. in an experiment to verify Newton's law of cooling, the temperature of hot water in a calorimeter $T/^{o}C$ is plotted against time t/min. Which of the following is true about the graph? (a) The graph is linear and parallel to the T-axis...

*September 24, 2015*

**chemistry**

7750 Joules of energy is added to a 325 grams stone at 24.0 degrees centigrade. The temperature increases by 75.0 degrees centigrade. What is the specific heat of the stone?

*March 10, 2013*

**chemistry**

7750 Joules of energy is added to a 325 grams stone at 24.0 degrees centigrade. The temperature increases by 75.0 degrees centigrade. What is the specific heat of the stone?

*March 10, 2013*

**chemistry**

7750 Joules of energy is added to a 325 grams stone at 24.0 degrees centigrade. The temperature increases by 75.0 degrees centigrade. What is the specific heat of the stone?

*March 10, 2013*

**science**

7750 Joules of energy is added to a 325 grams stone at 24.0 degrees centigrade. The temperature increases by 75.0 degrees centigrade. What is the specific heat of the stone?

*February 26, 2013*

**Finance**

You deposit $1000 for 5 years at 4% annual interest. In 5 years, you add $10000 to your account, but the rate on your account changes to 8% annual interest (for existing balance and new deposit). You leave the account untouched for an additional 15 years. How much do you ...

*March 15, 2012*

**3rd grade math**

Did you ever find answer?

*January 18, 2011*

**japan**

What is han ban desu ka?

*April 16, 2010*

**chemistry**

42cal

*November 22, 2009*

**Math**

Solving quadratic equations by completing the square. Could you show me every step how to do it. That way I'll know probably know how to do the other ones. With that method you use. 1/2x^2 + x -13 = 0

*October 30, 2009*

**Science**

What are examples of tame fish and wild fish.

*August 27, 2007*

**science**

what is the diference between turtle and tortoise. They look the same and why they are called differently. Hi I was unable to post some web addresses, but if you search under google "differences between turtles and tortoise" it will bring up some addresses with ...

*February 28, 2007*

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