# Posts by karim

Total # Posts: 13

**Math**

I am a number between 10and 20 my ones digit is the same as my tens digit

*September 29, 2016*

**Math**

I am a number between 50and60 my ones digit is three more than one

*September 29, 2016*

**8th grade Science please help**

A basketball with a mass of 0.60 kg is accelerated with a force of 10.8 N. If resisting forces are ignored, what is the acceleration of the basketball to the nearest m/s2?

*February 1, 2015*

**Science**

How much 0.1 M KCl is needed to dissolve 10 gm of precipitate?

*February 25, 2014*

**calculus**

3. Plot f(x) =ln(x) and f’(x) = 1/x in your calculator. Remembering that the derivative of f(x) is the instantaneous rate of change of f(x) why does it make sense that 1/x is the derivative of ln(x)?

*February 10, 2014*

**physics**

0.5 mol of salt (NaCl) is dissolved in 4.5 mol of water. What is the increase in entropy

*October 1, 2013*

**math**

sin42=165/x

*January 11, 2012*

**chemistry**

given the following data at a certain temperature, calculate K for the reaction between one mole of dinitrogen oxide gas and oxygen gas to give dinitrogen tetraoxide 2N2 + O2 TO GIVE 2N2 K=1.2X10-35 N2O4 TO GIVE 2NO2 K=4.6X10-3 1/2N2 + O2 TO GIVE NO2 K=4.1X10-9

*March 7, 2011*

**physics**

A 13 N horizontal force pushes a block weighing 4.5 N against a vertical wall (Fig. 6-26). The coefficient of static friction between the wall and the block is 0.68, and the coefficient of kinetic friction is 0.35. Assume that the block is not moving initially. In unit-vector ...

*March 6, 2011*

**physics**

You pull a short refrigerator with a constant force across a greased (frictionless) floor, either with horizontal (case 1) or with tilted upward at an angle 38° (case 2). (a) What is the ratio of the refrigerator's speed in case 2 to its speed in case 1 if you pull for...

*March 5, 2011*

**physics**

A hot-air balloon of mass 200 kg is descending vertically with downward acceleration of magnitude 1.2 m/s2. How much mass (ballast) must be thrown out to give the balloon an upward acceleration of magnitude 1.2 m/s2 (same magnitude but opposite direction)? Assume that the ...

*March 2, 2011*

**physics**

A hot-air balloon of mass 200 kg is descending vertically with downward acceleration of magnitude 1.2 m/s2. How much mass (ballast) must be thrown out to give the balloon an upward acceleration of magnitude 1.2 m/s2 (same magnitude but opposite direction)? Assume that the ...

*March 2, 2011*

**math**

You add it up

*December 12, 2010*

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