# Pete

Popular questions and responses by Pete
1. ## Math

3) Find the value of m for which (i) (5^m×5^3×5^(-2))/5^(-5) =5^12 (ii) (2/9)^3×(2/9)^(-6)=(2/9)^(2m-1)

2. ## physics

On Mars, the acceleration due to gravity is 3.71 m/s2. How far would a rock fall in 3 s if you dropped it on Mars?

3. ## Algebra

If 7 cartons of apple juice and 2 cartons of grapefruit juice cost £6.15 and 5 cartons of apple juice and 8 cartons of gratefruit juice cost £9.19 calculate the cost of 2 cartons of apple juice and 5 grapefruit juice Using Algebraic calculation

4. ## Chemistry

Topic: Sublimation and Fusion How much heat (in kJ) is required to warm 13.0 g of ice, initially at -14.0 C, to steam at 112.0 °C? The heat capacity of ice is 2.09 J/g⋅°C and that of steam is 2.01 J/g⋅°C. Any help on how to start this is really

5. ## Geometry

TAN (?) = 15 What is the missing value to the nearest hundredth? My guess is 86.19. :)

6. ## Physics(friction)

Find the coefficient of friction between a 73kg cubic box measuring 3m and a hardwood floor 16m long and 20m wide if a total of 236N is required to start the box moving.

7. ## Financial maths

Tara is saving for an overseas trip. Her taxable income is usually about \$20 000. She estimates that she will need \$5000 for the trip, so she is going to do some extra work to raise the money. How much extra will she need to earn in order to have \$5000

8. ## English

The teacher will show the students a picture of a bess beetle with all the parts labeled. Does bess need to be Bess? I used bess beetle through my whole paper not sure when to capitalization bess.

9. ## Maths

Ravi decides to Choose a 5 digit passcode from the Following 7 characters 1. 9. 6. 7. R. P # No digits are used twice A ) how many combinations of 5 digits are there ? B) Probability that The one he chooses will start with a R and end in P

10. ## physics

Heather and Jerry are standing on a bridge 51 m above a river. Heather throws a rock straight down with a speed of 17 m/s . Jerry, at exactly the same instant of time, throws a rock straight up with the same speed. Ignore air resistance. How much time

11. ## Chem

What is the major(s) products of 2-methyl-1,3-cyclopentadiene with the addition of HBr(conc) at 40C ?

12. ## pre-calc

jessica is standing 2 miles from the center of the base of pikes peak and looking at the summit of the mountain which is 1.4 miles from the base, what angle of elevation is jessica looking at the summit of the mountain?

13. ## Physics

Find the current in the 10.0 resistor in the drawing (V1 = 20.0 V and R1 = 15.0 )..?

14. ## PS

Does it look to you like Aristotle ever performed any actual experiments with falling objects? Explain your answer, based upon your observations from this lab .

15. ## physical science

A ball was dropped off a cliff and took 3.09 s to fall to the water below. Neglecting air resistance, how fast (in m/s) was the ball moving just as it hit the water

16. ## history

what is the authors view of the intergrity and effectiveness of those involved in the republican governments in the Southern states? Is the view of the "carpetbaggers" and "scalawags" positive, negative, or neutral?

17. ## Algebra

Y=X2+bx+c (the 2 means squared) Y = 16 when x= 0 Y= 0 when x=-2 Find the values of b & c

18. ## Writting skills

Q-----An appositive is a noun that is placed after another noun in order to tell more about it and its usually set off with commas.

19. ## Writing

13. Which of the following is a complex sentence? A. I would like to visit the Kinshasa, but I understand the city is unsafe for foreigners. B. As Jake was reading the letter from June yet again, the flight attendant coughed gently to get his attention. C.

20. ## fire science

A compartment measures 14 feet wide, 12 feet long and 8 feet high, lined with ½ inch sheetrock and has a standard 36 inch by 80 inch door. What HRR is required for flashover?

21. ## Physics

A fire helicopter carries a 555 kg empty water bucket at the end of a cable 20.9 m long. As the aircraft flies back from a fire at a constant speed of 38.4 m/s, the cable makes an angle of 38.3° with respect to the vertical. A) After filling the bucket

22. ## Math

Mr. Smith bought shoes for \$ 120 and a suit for \$ 340. Find the total cost including tax if the tax rate is 5.5%. (a)\$485.30 (b)\$48.53 (c)\$ 358.70 (d)\$460 (e)\$406

23. ## P.S.

A ball was dropped off a cliff and took 3.09 s to fall to the water below. Neglecting air resistance, how far (in meters) did it fall? (How far is it down to the water?)

24. ## English

I went to parent-teacher conferences, and it was not what I expected. I have learned that at parent-teacher conferences not all the parents show up. Are those sentences correct?

25. ## English

I made up a game for them to play and made a mental note to keep extra activities on hand for when my class finishes earlier than expected. Is this correct? My supervising teacher informed me that I speak well in class. My supervising teacher informed me

26. ## Physics

The speed of longitudinal waves, called P waves, is 7274.0 m/s. Transverse waves, called S waves, travel at a slower 3803.0 m/s. A seismograph records the two waves from a distant earthquake. If the S wave arrives 4.47 min after the P wave, how far away

27. ## Chemistry

At a certain temperature, the pH of a neutral solution is 7.77. What is the value of Kw at that temperature?

28. ## physics

a 0.180 kg ball falls 2.5m. How much work does the force of gravity do on the ball?

29. ## English

A teacher has so many things that they are responsible for and for that reason; it is beneficial for everyone to have as much help as possible. Is this sentence correct or should it be a comma after reason?

30. ## Chemistry...verification

2 equation 2CoI3 + 3 K2S= Co2S3 + 6KI 2 moles of Cobalt (III) iodide + 3 moles of Potassium sulfide = cobalt (III) sulfide + 6moles of Potassium Iodide assuming all that can react will react, how many grams of cobalt (iii) sulfide will form when 1318.89

31. ## Calculus

A fence 6 feet tall runs parallel to a tall building at a distance of 7 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

32. ## Grammar

Is the word "Scary" - 1. Word with short vowel, or 2. Word with long vowel A, E.

33. ## Algebra

Solve 3(2x-3)

34. ## Spanish

1. ¿Qué es el gerundio de "llamar"? 2. ¿Qué es el gerundio de "beber"? 3. ¿Qué es el gerundio de "dividir"? 4. ¿Qué es el infinitivo de "mirar"?

35. ## Mass Spectrometry

I don't have a clue where to start with this problem: Carbon has two stable isotopes, 12/6C and 13/6C, and fluorine has only one stable isotope, 19/9F. How many peaks would you observe in the mass spectrum of the positive ion of CF4+? Assume that the ion

36. ## physics

Santa's sleigh currently runs at 203mph, but he needs it to reach 400mph with all the packages he has to deliver. If Santa is delivering presents at an altitude of 5,813.6ft, with the same drag and weight of a 2019 Challenger SRT hellcat redeye, how much

37. ## Math

your dog's water bowl is 3/4 full. after taking a drink, the water bowl is 1/3 full. what fraction of the bowl did your dog drink?

38. ## Algebra

The perimeter of a rhombus is 80 centimeters. The lengths of its diagonals are in the ratio 3:4. Find the length of each diagonal.

39. ## Electronics

How long does it take for a 10 motivated capacitor with a 1 megaohm resistor in series to charge to 67% (1 time constant) of the applied voltage?

40. ## Statistics

Four cards are chosen at random. What is the probability that at least 2 are J's? How is this problem computed? Using Combinations or permutations?

41. ## math

what size circumference would fit in a rectangle 11 in. x 16 in.

list the steps to analyzing a graph from a slope mentality.

43. ## biology

A toxin from a poisonous mushroom has been identified as a hydrophobic weak acid. It somehow can find its way to the inner membrane of mitochondria where it gets protonated on the outer surface of the membrane but deprotonated on the inner surface of the

44. ## biology

A toxin from a poisonous mushroom has been identified as a hydrophobic weak acid. It somehow can find its way to the inner membrane of mitochondria where it gets protonated on the outer surface of the membrane but deprotonated on the inner surface of the

45. ## Chemistry

If E Cu+2 had been chosen as the standard reference electrode and had been assigned a potential of 0.00 V, what would the reduction potential of the hydrogen electrode be relative to it?

46. ## Geology

The Sun Is 150 Million Kilometers From The Earth, And The Earth's Equatorial Radius Is 6378 Km. How Much Would You Expect The Sun's Intensity To Drop, Based Only On This Additional Distance?

47. ## math

what is the maximum speed of a stationary bike set at a constant resistance rate of 2 kilopounds? how far could you travel in 12 minutes and 54 seconds?

48. ## English

What is the subject and subject complements of this sentence "Lack of water and wood remained a problem for Europeans." Is it lack and problem

49. ## physics

The edges of a shoebox are measured to be 11.9 cm, 17.3 cm, and 29 cm. Determine the volume of the box retaining the proper number of significant figures in your answer.

50. ## statistics

Between 50 and 80 people are hired on a ship. 75% speak English only and 25% speak German only. What is the mean number of people that speak English only? Can this even be calculated?

51. ## physics

Two hockey players strike a puck of mass 0.159 kg with their sticks simultaneously, exerting forces of 1.30 103 N, directed west, and 9.90 102 N, directed 30.0° east of north. Find the instantaneous acceleration of the puck.

52. ## chemistry

Your x-ray lab has a monochromator consisting of a single crystal of nickel cut so that the plane lies in the cube face. At what angle (in degrees) should the cube face be tilted with respect to the incident beam in order to select radiation with a

53. ## math

Mr Ernst leaves home at noon, traveling at 50 mph. His loving wife leaves at 1 pm with a briefcase that Mr. Ernst forgot. How fast must his wife drive to catch him by 5 pm?

54. ## Math

Whats the monthly principal and interest payment for a mortgage with a financed amount of \$81,000 at 9% for 25 years?

55. ## Physics

Calculate the resistance of 80 metres of copper wire, with a c.s.a. of 0.5mm2, given its resistivity of 1.72 x 10^-6 ohms per metre, Note, the area of the wire must be expressed as a portion of its base unit of measurement, which is the square metre.

56. ## Physics

Suppose that you are using a multimeter on the OHMS scale to test a capacitor and the meter reads zero. What condition of the capacitor does this indicate?

57. ## Physics

A fuel has heat of combustion equal to 30 kJ / g. How much energy is released when 5 kilograms are oxidized?

58. ## Physics

A compartment measures 3.5 meters by 5.5 meters and is 3 meters high. A fire raises the temperature from 68of to 1500 of. If the starting pressure was 1 atmosphere, what volume is present at the elevated temperature assuming the compartment has openings to

59. ## Physics

A compartment measures 3 meters by 5 meters and is 2.8 meters high. A fire raises the temperature from 20oC to 1000 oC. If the starting pressure was 1 atmosphere, what pressure is present at the elevated temperature assuming the compartment remains closed?

60. ## Math

Sales tax an item that cost \$3.00 + tax rate is 6%

61. ## Math

Find the sum of all integers c, such that for some integers a and b satisfying a

62. ## Algrbra

A certain paperback sells for \$12. The author is paid royalties of 11% on the first 10,000 copies sold, 12.5% on the next 5000 copies, and 18% on any additional copies. Find a piecewise-defined function R that specifies the total royalties if x copies are

63. ## math

Robert planted pumpkins to sell. Their garden has 5 sides. 5 feet 8 inches, 7 feet 8 inches, 10 feet 3 inches, 7 feet 5 inches, 7 feet 11 inches. What is the perimeter of their garden?

64. ## Chemistry

Calculate the velocity of a rock that weighs 48 grams dropped from a height of 355 meters, gravity 9.8

65. ## nuclear

Calculate the age of a plant sample that shows about one-eighth of the carbon 14 of a living sample. The half-life of carbon-14 is about 5760 a. Help please...

66. ## Math

heather has \$2.50 in nickels, dimes, and quarters. she has 3 times as many nickels as dimes and four times as many quaters as dimes

67. ## human religions

Can you provide any examples of how some religions combine their religious practices?

68. ## human religions

what effect do you think the “combining of religious practices” will have on the future of organized religion?

69. ## physics

A toboggan of mass 8.4 is moving horizontally at 18 . As it passes under a tree, 18 of snow drop onto it. We're covering Momentum and collisions, and I have no idea where to start here.

70. ## physics

A toboggan of mass 8.4 is moving horizontally at 18 . As it passes under a tree, 18 of snow drop onto it. We're covering Momentum and collisions, and I have no idea where to start here.

71. ## Chemistry

Balance: NH3 + [Cd(NH3)4] > Cd2+ + NH4+

72. ## probabilities

The proportion of red marbels in a large jar of red and black marbels is 0.4 and the percentage of damaged red and black marbels is 0.7. What is the probability of selecting randomly a black and damaged marbel? If you randomly select three marbels, what is

73. ## Psychology

Like the popular belief that older adults do poorer in schools than their younger counterparts, the midlife crisis___________________. 1.is more accurate when describing an older population. 2.is more accurate when describing adolescents. 3.occurs more

74. ## physical science

If a ball is thrown straight up at a speed of 27.8 m/s, how long (in seconds) will it continue to rise before it starts to fall back down

75. ## physics

if a van has a package in the back and is traveling 55 miles and hour is in a head on collision with a vehicle also traveling 55 miles an hour how fast is the package in the back of the van going to hit the driver in the back

76. ## computer science

to write a report on Object-Oriented Systems. The report should focus on the following systems including definition, applications, and advantages and disadvantages. • Object-oriented Systems • Object-oriented database • Object-oriented data modeling

78. ## English

Will write a paragraph of what they think is the best defense mechanism of the Bess beetle and why. Is this sentece correct or should Bess be lower case?

79. ## English

I did not realize how important it was to collaborate with the staff at school, such as janitors, until I need them in my room. Teachers have so many responsibilities, and for that reason, it is beneficial for evryone to have as much help as possible. Are

80. ## English

It took me a while to meet my communication goals, because Mrs. step was not their for a while. Does this sentence need the comma before because?

81. ## Critical Thinking

Which of the following illustrates the key difference between subjective and non-subjective issues?

82. ## English

The students are not so talkative in their new seats, but, they still work well in groups. The students are not so talkative in their new seats, but they still work well in groups. Which way is correct?

83. ## English

I wanted to clean the desk, because there was no room for anything on it. I, also, wanted to clean it because when papers where put down on the desk you could not find them later that day. Are these two sentences correct? Do you also put commas saying I,

84. ## English

I learned that handling behavior in a science lab is easy to do as long as the ground rules have been laid out for the students. Is this sentence correct?

85. ## English

After we did two types of sand together, he did the rest on his own. or After we had done two types of sand together, he did the rest on his own. Which one is correct?

86. ## English

I need the vocab word for the following definiton: Unrealistic devices or procedures that the audience agrees to accept (ex: aside).

87. ## english

in tragedy vocabulary. I need the word for the following definition. a device where by the audience or reader understands more of a situation or of what is being said than a character is aware of.

88. ## physics

How long would a 150 W lightbulb have to glow to produce the same amount of energy expended by Georgie? Answer in units of s.

89. ## physics

A lawn roller is rolled across a lawn by a force of 109 N along the direction of the handle, which is 24.2 above the horizontal. If the lawn roller develops 66.1 W of power for 64 s, what distance is the roller pushed? Answer in units of m.

90. ## physics

A lawn roller is rolled across a lawn by a force of 109 N along the direction of the handle, which is 24.2 above the horizontal. If the lawn roller develops 66.1 W of power for 64 s, what distance is the roller pushed? Answer in units of m.

91. ## physics

A lawn roller is rolled across a lawn by a force of 109 N along the direction of the handle, which is 24.2 above the horizontal. If the lawn roller develops 66.1 W of power for 64 s, what distance is the roller pushed? Answer in units of m.

92. ## Math

Solve the system of equation. x+y+z=6 3x-2y=4z=9 x-y-z=0 ________

93. ## English

The learner will distribute color coded index cards with the three main types of rocks written on them to be used in class question and answer session. Is this sentence correct or does it need a comma?

94. ## English

She also told me that I need to write as well as I speak, and I agree with her. She also told me that I needed to write as well as I spoke, and I agree with her. Which on is correct? This is for a paper and it is supposed to be in past tense.

95. ## physics

A simple pendulum has a length of 1.5 m and is pulled a distance y = 0.24 m to one side and then released. (Assume small angle.) What is the speed of the pendulum when it passes through the lowest point on its trajectory?

96. ## chem

What is the empirical formula for Ba(NO3)2

97. ## Physics

For a certain transverse wave, the distance between two successive crests is 1.89 m, and 5 crests pass a given point along the direction of travel every 12.84 s. Calculate the wave speed.

98. ## Physics

A microphone has an area of 6.7 cm2. It receives during a 4.62 s time period a sound energy of 2.5x10-11 J. What is the intensity of the sound?

99. ## Physics

A wave with frequency 12.2Hz and amplitude 47.7 mm moves in the positive x direction with a speed of 8.9 m/s. What is the waves wavelength?