# Timothy

Popular questions and responses by Timothy
1. ## math

What is the greatest prime number you must consider to test whether 5141 is prime?

2. ## Science(Chemistry)

HCL+Al=AlCl3+H2 What is the ionic equation,the spectator ions and the overall or net ionic equations?

3. ## math

A musician plans to perform 5 selections for a concert. If he can choose from 8 different pieces, how many ways can he arrange his program?

4. ## Physics

A knife thrower throws a knife toward a 300-g target that is sliding in her direction at a speed of 2.30 m/s on a horizontal frictionless surface. She throws a 22.5-g knife at the target with a speed of 39.5 m/s. The target is stopped by the impact and the

5. ## Chem

1) Which solution will have the lowest OH- A) Na2CO3 B) NaHCO3 C) NaCl D) NaHSO4 E) NH4Cl 2) Which solution will be the strongest base? A) Na2CO3 B) NaHCO3 C) NaCl D) NaHSO4 E) NH4Cl 3) Which aqueous solutions are acidic? A) Na2CO3 and NaHCO3 B) NaCl and

6. ## Math: Algebra

1. Which method would be the simplest way to solve the system? 7x + 5y = 19 –7x – 2y = –16 A.) graphing B.) substitution C.) elimination D.) distributive I think it is C.

7. ## Math

write 2.3 x 10^3 in standard form

8. ## physics(optics)

The critical angle between an equilateral prism and air is 45 degrees.if the incident ray is perpendicular to the refracting surface,then what happens?

9. ## math

If 8% of c is equal to 12% of d, which of the following is equal to c+d?

10. ## Science

animals with bilateral symmetry

11. ## math

On a certain legislative committe, 3/8 of the committee members are Republicans. If 2/3 of the members are men and 3/5 of the men are Democrats, what fraction of the members are Democratic women?

12. ## Physics

Suppose a block of mass of lead of mass 0.4kg at temperature 95°C is dropped in 2kg of water originally at 20°C in a container.calculate the final temperature if no heat is lost to the container and environment;

13. ## math

on one side of my street the homes all have odd numbers ending with the musa which is number 16 On the other side the number are all even ending with nwosu which is number 17 Femi olu is my next door neighbor and his house is number 9 you pass my house

14. ## Math

Factorthen use fundamental identities to simplify the expression below and determine which of the following is not equivalent cot^2 a * tan^2 a + cot^2 a A. csc^ 2 alpha B.1/ sin^ 2 alpha C.1/ 1-cos^ 2 alpha D.sec^ 2 alpha E.1+cot^ 2 alpha

15. ## Math

1. -7/9 x 3/5 2. -2/5 x -1 1/4 3. 1 3/5 x - 3/4 4. -7/8 x -1 3/7

16. ## Physics

The electric field from an infinitely large and uniformly charged sheet is independent of the distance from the sheet, yet the individual charges in the sheet all produce fields that object the inverse square law. Why doesn't the field get weaker at

17. ## math

45 divide by 9 + m x 3 = 23? Help??

18. ## Math

The squares of three positive integers are in arithmetic progression, and the third integer is 12 greater than the first. Find the second integer.

19. ## Ed Tech

when writing a personal narrative what point of view would be best to use

20. ## Science

why do living things need food water and the ability to get rid of waste

21. ## math

If x and y are reciprocals of each other, then their product always equals A. 1 B. x^2 C. y^2 D. 1/x^2

22. ## math

If w whistles cost c cents, how many whistles can you get for d dollars?

5/2=×/7

24. ## math

Don't laugh at me lol...it says Jamal is 5 feet tall. One sunny morning he notices that he casts a shadow that is 2 feet long. If the school building casts a shadow that is 7 feet long at the same time, what is the height of the building?

25. ## math

Is 16.6 a rational number?

26. ## math

A Coast Guard ship patrols an area of 125 square miles. The area the ship patrols is a square. About how long is each side of the square? Round your answer to the nearest mile.

27. ## Physics

A rocket is fired with 9.37 km/hr, find the maximum altitude. (no air resistance)

28. ## Social Studies

How did Roosevelt’s response to German aggression toward Britain differ from his response to Japanese aggression toward China? I think it is C or D? A.He condemned the aggression toward China but not toward Britain. B.He condemned the aggression toward

29. ## Math: algebra 1

6. In which quadrant does the solution of the system fall? y = x – 1 y = –3x – 5 A.) I B.) II C.) III D.) IV I think it is c.

30. ## Chemistry

A student reacted 5.33 grams of cobalt with oxygen gas and obtained 7.50 grams of cobalt oxide. Determine the empirical formula of this cobalt-oxygen compound based upon this experiment.

31. ## Science(Chemistry)

Explain what would happen when bromine water is added to potassium iodide solution and what is its balanced chemical equation?

32. ## grammar

Which is the correct verbal usage of the following sentence? I let it there while I stood and applauded or I left it there while I stood and applauded?

33. ## pyshics

A small rock moves in water, and the force exerted on it by the water is given by the equation Fd = kv, where k is a constant. The terminal speed of the rock is measured and found to be 2.0m/s. The rock is projected upward at an initial speed of 6.0m/s.

34. ## 11 U chemistry

Predict the products of a reaction between solid beryllium chloride and solid potassium,write the products in a balanced chemical equation also indicate what type of reaction this is.

35. ## math

Please help me I am confused on this math problem. solve. y/8-8/y=0 what are the solutions? Wouldn't they be 0?

36. ## Trigonometry

Hello, everyone: I am working on finding the exact values of angles that are less common and are therefor not found easily on the Unit Circle (at least, they are not labeled). For example, the problem I am asking about is: 10) Find the exact values of the

37. ## chemistry

how many cm³ of hydrogen chloride gas at stp would be required to precipitate all the silver ions from 32cm³ of 0.08molar silver nitrate solution?

38. ## Algebra

Given that a^2-b^2=0280 and a+b = 20, find the value of a-b.

39. ## Math

If x is positive, and x is decreased by 3, then a^2 - x^2 is a) increased by 6x-9 b) increased by 6x c)decreased by 9 d)increased by 6x+9 e)decreased by 6x-9

40. ## Math

ABC is a right triangle with each leg divided into 5 equal segments as shown. If the largest trapezoid has the area 36 cm^2, then the area of the second smallest trapezoid is what?

41. ## Math

A rectangular cube with sides measuring 4 cm, is made with 1 cm^3 blocks. Two straight tunnels of 4 cubes each are taken out. All exposed surfaces are painted including inside the tunnels. How many small cubes have been painted on exactly 3 faces?

42. ## Logic

What is it that comes i. Once in a year ii. Twice in a months iii. Four times in a week iv. Six times in a day

43. ## Math

A man is in a tree house 7ft above the ground. He is looking at the top of another tree that is 24ft tall. The bases of the trees are 40ft apart. What is the angle of elevation from the mans feet to the top of the tree? Round to the nearest degree. 23 31

44. ## math

in triangle SET, ES is congruent to ET, measure angle S = 4x - 6 and measure angle T = 3x + 3. Find the measurement of angle S, angle E, and angle T

45. ## Trig.

Hey I am doing test corrections and need help, Which of the following inverse functions are defined for x=-1/2 ? Select all that apply. Y=tan^-1 x Y=cos^-1 x Y=sin^-1 x Y=csc^-1 x Y=sec^-1 x Y=cot^-1 x

46. ## Math

If the radius of a right circular cylinder is tripled and its altitude is cut in half, then the ratio of the volume of the original cylinder to the volume of the altered cylinder is?

47. ## Maths

x+2y = 87, x+y =52. The value of 4x-3y is?

48. ## Math

use rounding or compatible numbers to estimate the sum 5 x 2 3/5

49. ## Ela

to place the caption at the top of the image you will need to change the

50. ## ELA

what is a key difference between the narrators of stolen day and the night the bed fell

5^2x 4+2^3

52. ## Math

write 5x5x5x5x5x5x5 using an exponent

54. ## algebra

-3(4y-9)+2(2y+6)

55. ## Math

Paul runs a speed of 9 miles per hour. How many miles per second is his speed?

56. ## Physics fundamentals

When a crate is moving on a track where friction is not negligible. The friction force is said to be kinetic friction static friction Non existant

57. ## Physics

A) An object with mass M=10kg is held on a incline. The object and the incline surfaces have a static friction coefficient of 0.3. What is the maximum angle at which the object starts moving? B) Again, suppose that the force in A) is a push applied

58. ## physics

How do you find the scalar product of two vectors, A=8m along the y-axis in the negative direction and B=15m, 30 degrees from the y-axis in the first quadrant. Thanks!

59. ## Physics

I think it is D) but I'm not quite sure. Thanks in advance! Right after the ball is thrown at angle of 45 deg, the acceleration is a)g b)sin(45) * g c)cos(45) * g d)tan(45) * g

Hello, could you guys let me know if this looks right? Thanks in advance. A ball is fired at a speed of 8 m/s at 20 degrees above the horizontal from the top of a 5m high wall. a) what is the total velocity at the maximum height? b) how far from the

61. ## Physics continued

Sorry, I didn't see that there was a second part to the question. What is the difference between this one and the previous question I posted? The x and y components of a certain force are measured and found to be Fx = 68 ± 3N and Fy = 42 ± 2 N,

62. ## physics

What equation do I use to find this? Thanks The x and y components of a certain force are measured and found to be Fx = 68 ± 3N and Fy = 42 ± 2 N, respectively. Calculate the error associated with the magnitude of this force?

63. ## math

Lucia is hoping that Angela will buy her a geometrically interesting piece of land on which he will build a mansion. Lucia has said that she will only buy the land if it costs less than \$4.00 per square foot. The plot shown below is listed for \$453,175. Is

64. ## Math

There is a football field. Around the field is the section of a spectator. The edge of the football field is 5 meters distance from the outside edge of the section of the spectator. The section of the viewer is 130m in length and has a width of 85m. The

65. ## math

game board 23 1/2 inches on all 4 sides= what will be the size of 64 squares on the board=

66. ## math

if the equation given is y^2-6y=24x+3, how do i out this equation into standard form, using complete the square as needed?

67. ## math

In a recent Math Duel, my team began by graphing 51x+24+75. If our opponents graphed a line parallel to ours, they might have graphed A. 17x+16y=25 B. 17x+8y=50 C. 34x+8y+50 D. 34x+16y=50

68. ## math

If the product of 1999 real numbers is -1998, at least how many of these 1999 real numbers must be negative? A. none B. 1 C. 1997 D. 1998

69. ## math

The number ? could be the sum of three consecutive integers. A. 0 B. 2 C. 4 D. 8

70. ## Math Algebra

Jessica is 4 years younger than Jennifer now. In 10 years, Jessica will be twice the age that Jennifer is now. Find the present ages of Jennifer and Jessica

71. ## uga

Assume the z test statistic equals 0.99, find the the p-value if Ha:p> 0.50

72. ## Science

A hammer with a 500-g head exerts an average force of 810n on a nail speed as it drives the nail 4 mm into wall. What was the speed of the hammer head when it hit the nail?

73. ## Geometry

A tree on a 30 degree slope grows straight up. What are the measures of the greatest and smallest angles the tree makes with the hill?

74. ## math

is the square root of 9 a rational number?

75. ## Economics

In relation to Economics, explain the difference between nominal data and real data? *if someone can help me understand this better, I would be greatful.

76. ## Physics 1

Two balls have the same size and mass. One is hollow, the other one is solid. How would you determine which is which without breaking them apart?

77. ## Physics 1

If you see an object rotating, is there necessarily net torque acting on it? Explain

78. ## physics

jabu phuses a cart that is of mass 5kg with a speed of 1m,s she suddenly increase the force acting on the cart to move 2m,s for a distance of 50m (a)calculate the force causing the cart to speed up

79. ## science

A dog (canis familiaris) and a coyote (canis latrans) will readiliy mate in captivity and their offspring are healthy and fully fertile. Are we justified in saying they are distinct species? What might this tell us about the history of dogs and coyotes?

80. ## Physics

A music is played causing 82 dB. A baby cries causing 72 dB annoying the people around him by 123.7 m. What is the sound intensity level?

81. ## Physics

A skydiver falls in air reaching terminal velocity, he shouts to his friend at 2000 Hz. His friend receives it at 2355 Hz, what is the divers speed?

82. ## Physics

A simple harmonic pendulum has a period of 3.19 s and initial speed of 2.12 m/s. Find the length.

83. ## Physics

Two organ pipes are imitating a sound of 12 Hz, one of them is 12 m long. What is the length of the other pipe?

84. ## Computer

How do i write a ratio into excel

86. ## Physics

During a brown-out, the electric power company drops the voltage of the power line and the incandescent light bulbs in your house become dimmer. When this happens, the filaments in the bulbs operate at a lower than normal temperature, so a. their color is

88. ## math

A kicker punts a football from 3 feet above the ground with an initial velocity of 47 feet per second. Write an equation that gives the height (in feet) of the football as a function of the time (in seconds) since it was punted. Find the height (in feet)

89. ## math

solve by completing the square x^2-3x=4 please show work

90. ## Math: Algebra 1

2. What is the solution of the system? 7x + 5y = 19 –7x – 2y = –16 A.) (2, 1) B.) (1, 2) C.) (7, 5) D.) (–7, –2) I think it is A.

91. ## Math: algebra 1

3. Which method would be the simplest way to solve the system? y =1/2 x 2x + 3y = 28 A.) graphing B.) substitution C.) elimination D.) distributive I think it is B.

92. ## Science

Waht animals are in the Nile Delta? I already have crocodile & hippo. I need 1 more mammal, a type of fish, and an insect.

93. ## Chemistry

How many grams of KNO3 (molar mass = 101.103 g/mol) should be used to make 325.0 ml of 0.070 M solution?

94. ## world geography

why are climates grouped by latitude?

95. ## Science(Chemistry)

Mg+H2O=MgOH+H2 What is the ionic equation,the spectator ions and the overall or net ionic equations?

96. ## Science

ive got 2 questions: the star Vega is 25 lightyears away from us. if we sent a radio message to Vega, and another civilization on a planet circling that star answered us, in what year could we expect to hear a reply? why was it necessary to make radio

97. ## math

The probability that a voting-age adult in 2004 voted in the presidential election was 0.57. Five voting-age adults in 2004 were randomly selected. Find the probability that exactly 2 or the 5 adults voted in the presidential election.

98. ## Math

A bullet hole in the wall at height of 7'6 inches from the floor. Bullet passed through wall at angle 34 degrees. If they assume that the gun was fired from a height 4' above the floor, how far away from the wall was it when it was fired? (nearest inch)

99. ## Math

Find the perimeter of a right triangle which has a side 7 in. long and the angle opposite to it measures 37 degrees.