Ask a New Question
Search
Questions and answers by
Jayd
Questions (37)
A 9 kg lead brick falls from a height of 1.8 m. a) Find the momentum as it reaches the ground. b) What impulse is needed to
3 answers
1,807 views
Kyle is flying a helicopter and it is rising at 4.0 m/s when he releases a bag. After 3.0s
a) What is the bag's velocity? -25.4
2 answers
1,633 views
A car moving with a constant acceleration covers the distance between two points 60 m apart in 6.0 s. Its velocity as it passes
3 answers
744 views
What is the maximum speed at which a car could be moving and not hit a barrier 35.0 m ahead if the average acceleration during
3 answers
1,167 views
A rocket traveling at 165 m/s is accelerated at a rate of -32.0 m/s.
a) How long will it take before the instantaneous speed is 0
4 answers
510 views
Car A is traveling at 84 km/h while Car B is traveling at 58 km/h. What is the relative velocity of Car A to Car B if they both
1 answer
463 views
Car A is traveling at 84 km/h while Car B is traveling at 58 km/h. What is the relative velocity of Car A to Car B if they both
3 answers
459 views
You drive your car from home at an average spped of 78km/h for 2 h. Halfway to your destination, you develop some engine
4 answers
594 views
The average distance between Earth and the sun is 1.50e8 km.
Calculate the average speed, in km/h, of Earth assuming a circular
0 answers
1,154 views
Water drips from a faucet into a flask at the rate of two drops every 2 seconds. A cubic centimeter (cm3) contains 20 drops.
1 answer
1,510 views
The radius of Earth is 6.37 103 km.
Find the speed, in km/h, resulting from the rotation of Earth, of a person standing on the
0 answers
1,196 views
The average distance between Earth and the sun is 1.50e8 km.
Calculate the average speed, in km/h, of Earth assuming a circular
0 answers
801 views
The value of ^G for the following reaction is -5490 kJ. Use this value and data to calculate the standard free energy of
1 answer
1,294 views
The value of ^G for the following reaction is -5490 kJ. Use this value and data to calculate the standard free energy of
0 answers
618 views
Are mixing and separation increases in entropy?
0 answers
435 views
What is the ^S for NaCl (l)?
0 answers
372 views
The value of ^G for the following reaction is -5490 kJ. Use this value and data to calculate the standard free energy of
0 answers
471 views
I will be happy to critique your thinking on this. First, calculate the moles of H2 used.
2.0e8 L H2/22.4 L H2 = 8.9e6 mol H2 For
0 answers
644 views
The enthalpy of neutralizatino for the reaction of a strong acid with a strong base is -56 kJ/mol of water produced. How much
0 answers
1,182 views
The total volume of hydrogen gas needed to fill the Hidenbrug was 2.0e8 L at 1.0 atm and 25 degrees Celsius. How much heat was
1 answer
555 views
The total volume of hydrogen gas needed to fill the Hidenbrug was 2.0e8 L at 1.0 atm and 25 degrees Celsius. How much heat was
0 answers
1,427 views
The enthalpy of neutralizatino for the reaction of a strong acid with a strong base is -56 kJ/mol of water produced. How much
0 answers
540 views
Calculate the change in heat:
2 Na(s) + 2 H2O(l) > 2 NaOH(aq) + H2(g) So far this is what I have: 2 H20 --> 2 H2 + O2 2(285.83)
0 answers
1,091 views
C4H4 (g) + 2 H2 (g) --> C4H8 (g)
Combustion reactions involve reacting a substance with oxygen. When compounds containing carbon
3 answers
12,363 views
The total volume of hydrogen gas needed to fill the Hidenbrug was 2.0e8 L at 1.0 atm and 25 degrees Celsius. How much heat was
0 answers
488 views
The partial pressure of CH4(g) is 0.185 atm and that of O2(g) is 0.300 atm in a mixture of the two gases.
a) What is the mole
1 answer
969 views
If 36.0 mL of 7.0e-4 M HClO4 is added to 19.5 mL of 8.2e-4 M LiOH, what is the pH of the solution?
Write the equation. Calculate
0 answers
789 views
A 12.00 mL sample of sulfuric acid from an automobile battery requires 34.62 mL of 2.42 M sodium hydroxide solution for complete
0 answers
1,615 views
What volume of .0500 M Ba(OH)2 will react completely with 21.00 mL of .500 M HCl?
Same type problem. Post your work if you get
0 answers
786 views
Hydrochloric acid (77.0 mL of .267 M) is added to 236.0 mL of .0730 M Ba(OH)2 solution. What is the concentration of the excess
0 answers
593 views
What volume of .0500 M calcium hydroxide is required to neutralize 38.50 mL of .0400 M nitric acid?
1. Write the equation. 2. M
0 answers
1,204 views
What volume of .100 M NaOH will react completely with 21.00 mL of .500 M HCl?
Vb*ConcBase= Vacid*ConcAcid Solve for Vb. 21.00 mL
0 answers
580 views
If 15.0 mL of 1.2e-4 mol/L HI is added to 26.0 mL of 9.2e-4 mol/L HI, what is the pH of the solution?
M x L = mols. Calculate
0 answers
464 views
A stock solution containing manganese ions was prepared by dissolving 1.542 g pure manganese metal in nitric acid and diluting
0 answers
987 views
A solution of ethanol in water is prepared by dissolving 61.0 mL of ethanol (density = 0.79g/mL) in enough water to make 280.0
0 answers
1,084 views
Calculate the sodium ion concentration when 45.0 mL of 2.5 M sodium cabonate is added to 30.0 mL of 1.0 M sodium bicarbonate.
mol
0 answers
467 views
How much of solid potassium chromate whould you use to prepare 2.00 L of 0.400 M potassium chromate?
M x L = mols g/molar mass =
0 answers
1,037 views
Answers (9)
When I solve for a I get the .061 and this is incorrect for the constant acceleration. I don't know what I am going wrong.
12 - -32.1 = 44.1 I did not think it was this easy. I plugged the data into like four formulas trying to come up with an answer.
When I solve for a I get the .061 and this is incorrect for the constant acceleration. I don't know what I am going wrong.
d = 165^2/(2 x 32.0) d = 425.390
35 - (.9)(-10.0) = 44 V = 29.664 and this is incorrect Do I use the acceleration for the velocity or do I figure out the velocity from the informatin given?
acceleration = -32.0 m/s vf = 165 m/s vi = 0 d = ? Vf^2 = Vi^2 + 2ad d = Vf^2 - Vf^2/2a
Velocity = displacement/time Relative velocity = velocity with which a body approaches or recedes from another body Would you add the speeds of both cars in order to find the relative velocity between the two when they are traveling in the same direction
The answer would be 52 km/h.
This is the answer that I got when I worked it, but the webassign homework that I have marked the answer incorrect. I thought that maybe I was doing something wrong or missing an important part of the problem, thus causing my answer to be wrong.
