# Posts by Tarra

Total # Posts: 14

**math**

304.1

**math**

If an airplane travels at 300 mph with no air resistance, and it travels directly south with a wind of 50 mph east, how fast is the plane going?

**Physics**

A mass and spring are arranged on a horizontal, frictionless table as shown in the figure below. The spring constant is k = 480 N/m, and the mass is 4.8 kg. The block is pushed against the spring so that the spring is compressed an amount 0.31 m, and then it is released. Find ...

**Physics**

A truck of mass 7520 kg is traveling along a level road at an initial speed of 32.9 m/s and then slows to a final speed of 17.9 m/s. Find the total work done on the truck.

**Physics**

A ball is thrown straight up and rises to a maximum height of 20 m above the ground. At what height is the speed of the ball equal to half of its initial value? Assume that the ball starts at a height of 2.1 m above the ground.

**Chemistry**

A student mixed 75.0 mL of water containing 0.75 mol HCI at 25* C with 75.0 mL of water containing 0.75 mol of NaOH at 25*C in a foam cup calorimeter. The temperature of the resulting solution increased to 35*C. How much heat in kilojoules was released by this reaction? C (...

**Math**

Your body consists of 7/10 water. Is more than 1/2 your body water? Explain

**chemistry**

hi Dr Bob..can you please help me with this chemistry problem? I got problem dealing with the chemical formula.How i want to find the number of moles of 2g of Fe(NH4)2(SO4)2.6H2O???please help me.Thank you

**math**

Did i do these problems correctly? 1. 39*(-43)= -1677 I multiply 39 and -43 and the answer was -1677 2. Find absolute value of |-7| and the answer is 7. It is the opposite of what it is. 3. Add. -24 + (-17) The answer is -41. They both are negative so you just add them ...

**math**

If you have a grade average at 50% and you score 89% percent on a test what does your grade equal out to?

**english**

please could someone tell whether the film miss congeniality was a book. If not can you think of a film that was a book, which had a character similar to gracie hart either as the fbi agent or as miss new jersey. many thanks

**english**

what are the themes in act 2 scene 2 of macbeth

**math**

I take it you go to Phoenix or Axia eh?

**Chemistry to DrBob**

hi DrBob..i got confused dealing with this chemical formula.how i want to find the num of moles of 2g of Fe(NH4)2(SO4)2.6H2O??? Can you help me.

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