# Dani

Popular questions and responses by Dani
1. ## Physics

Two forces are applied to a car in an effort to move it, as shown in the following figure, where F1 = 402 N and F2 = 364 N. (Assume up and to the right as positive directions.)(F1 is 10degrees and F2 is 30degrees) (a) What is the resultant of these two

2. ## english

What is a simile, idiom, or metaphor for relief?

3. ## Chemistry

Use the data in the table to calculate the equilibrium constant for the following reaction. HCOOH(aq)+ OH −(aq) equilibrium reaction arrow HCOO−(aq)+ H2O(l) HCOO is 5.9e-11 (Kb) HCOOH is 1.7e-4 (Ka) Not sure how to find the equilibrium constant given

4. ## Algebra problem

Multiply (x-5/4x+8)*(12x^2+32x+16) A. (3x+2)/4(x-5) B. (x-5)(3x+2)/4 C. (x-5)(3x+3) D. (x-5)(12x+8) Please help me solve this problem because all I get is 3x^2-13x-10 (which isn't a choice.)

5. ## Algebra 1

The width (w) of a rectangular pool is x+4. The area (A) of the pool is 2x^3 - 29x + 12. What is an expression for the length of the pool? A. 2x^2 + 8x + 3 B. 2x^2 - 8x - 3 C. 2x^2 - 8x + 3 D. 2x^2 + 8x - 3 I'm not sure please help me with this problem!

6. ## Algebra again

Simplify 5x^3/7x^3+x^4 Is the answer 5/7+x where x is not equal to 0,-7?

7. ## Physics

An electric motor rotating a workshop grinding wheel at a rate of 95 rev/min is switched off. Assume the wheel has a constant negative angular acceleration of magnitude 2.40 rad/s2. (a) How long does it take for the grinding wheel to stop? (b) Through how

8. ## science

1) a pea plant with yellow seeds is crossed with a pea plant with green seeds. all of the offsprings have yellow seeds. the allele for yellow sees is a. Dominate because all offspring have yellow seeds. b. Recessive because all of the offsprings have

9. ## Physics

Calculate the velocity of a satellite moving in a stable circular orbit about the Earth at a height of 2600 km.

10. ## Spanish

In Chile celebrations often revolve around: A) an asado B) a pebre C) a manteo D) a lúcuma I know that an asado is a type of food, pebre is sauce, manteo is a type of clothes, and lúcuma is a fruit. But I'm not sure what the answer here is. I know you

11. ## physics

An isolated capacitor of unknown capacitance has been charged to a potential difference of 100 V. When the charged capacitor is then connected in parallel to an un- charged 10.0 μF capacitor, the potential difference across the combination is 30.0 V.

12. ## Physics

An outfielder throws a 0.150 kg baseball at a speed of 26.0 m/s and an initial angle of 30.0°. What is the kinetic energy of the ball at the highest point of its motion?

13. ## Physics

An arrow is shot at a 30 degree angle with the horizontal. It has a velocity of 49m/s. The acceleration of gravity is 9.8 m/s2. How high will the arrow go?

14. ## Math

for what values of theta (0 < theta < 2pi) do maximum r values occur on the graph the polar equation r = 4-3 sin 3 theta

15. ## Chemistry Help!!

a kilogram of aluminum metal and a kilogram of water are each warmed to 75 degree Celsius and placed in two identical insulated containers. one hour later, the two containers are opened and the temperature of each substance is measured. the aluminum has

16. ## algebra

Use the formula 4.9t^2 +vot=s, where t is the time in seconds, vo is the initial velocity, and s is the distance in meters. Approximately how far will an object fall in 4 seonds, if it is thrown downward at an initial velocity of 20 meters per second (vo)

A ramp leading up to a loading platform is 3 m long and 1 m high at its highest point. If the friction is ignored, what work is needed to slide a 600-kg crate up the ramp at a constant speed? a) 2.00 *10^2 J b) 5.89 *10^2 J c) 1.80 *10^3 J d) 5.88 *10^3 J

18. ## Algebra 2

What is the sum of the arithmetic series 5 (sigma sign) n-1 (3n-2)?

Solve the inequality. Explain all steps and identify the properties used. 3a-4 less than or equal to 5 My answer: First, you add 4 to both sides: 3a - 4 + 4

20. ## chemistry

Calculate the heats of combustion for the following reactions from the standard enthalpies of formation listed in Appendix 2. (ΔH°f (HgO(s)) = -90.7 kJ/mol and ΔH°f (FeO(s)) = -272 kJ/mol.) (a) 2 Fe(s) + O2(g) 2 FeO(s) kJ (b) 2 CH3OH(l) + 3 O2(g) 2

21. ## L.A.

What is the part of the story in which the conflict eases?

22. ## Math (Word Problems)

I need to know how to set up this problem: A salesman drives from Ajax to Barrington, a distance of 120 miles, at a steady speed. He then increases his speed by 10 mph to drive the 150 miles from Barrington to Collins. If the second leg of his trip took 6

23. ## math

A total of \$7000 is invested: part at 6% and the remainder at 10% How much is invested at each rate if the annual interest is \$680?

24. ## physics

A small 0.18 kg metal ball is tied to a very light (essentially massless) string that is 0.8 m long. The string is attached to the ceiling so as to form a pendulum. The pendulum is set into motion by releasing it from rest at an angle of 40 ∘ with the

25. ## physics

Two loudspeakers, A and B, are driven by the same amplifier and emit sinusoidal waves in phase. Speaker B is 12 m to the right of speaker A. The frequency of the waves emitted by each speaker is 686 Hz. Sound velocity is 343 m/s. You are standing between

26. ## Math

For what values of a and b is the line 3x+y=b tangent to the curve y=ax^3 when x=–3?

27. ## Maths

Mr lee is 56 years old. His nephew, sam, is 4 years old. In how maby yearsâ€™ time will mr lee be 5 times as old as his nephew

28. ## physics

A diffraction grating having 180 lines/mm is illuminated with a light signal containing two wavelengths, λ1 = 400 nm and λ2 = 500 nm. The signal is incident perpendicularly on the grating. What is the smallest angle at which two of the resulting maxima

29. ## Chemistry

Apply the gas laws to determine how many grams of sodium azide (NaN3) are needed to fill the air bag of your vehicle to a volume of 79.0 L at 35.0 degrees celsius and 1.00 atm. The reaction occurring in the air bag can be repesented by the equation, 2NaN3

30. ## Physics

A tennis ball is hit into the air and moves along an arc. Neglecting air resistance, where along the arc is the speed of the ball a)a minimum and b) a maximum? I'm thinking it's at a max at the begging and end, and a min at the top, but that's just a

31. ## chemistry

The compete oxidation of 2g of an aldehyde A by acidified potassium chromate produces 2.1g of carboxylic acid B which is dissolved in 50 ml of distilled water . The obtained solution reacts with exactly 1.05 g of solid lime to form salt C a) Write the

32. ## calculus

the length of a rectangular prism is increasing at a rate of 8 cm/s, its width is increasing at a rate of 3 cm/s, and its height is increasing at a rate of 5 cm/s. when the length is 20 cm, width is 10 cm, and height is 15 cm, how fast is the volume of the

33. ## science

1. The process in which the chromosomes in sex cells are reproduced by half is called _____________. 2. A white mouse is crossed with a black mouse. all of the offspring were grey. The genes for fur color in mice show _________. 3. Genes are specific

34. ## Math

How many minutes would it take Rachel to jog 3 miles if she jogs 1/15 mile every minute?

35. ## Chemistry

Although the VSEPR theory is correct in predicting that CH4 is tetrahedral, NH3 is trigonal pyramidal, and H2O is bent, the HNH angle in NH3 is only 107.3° and the HOH angle in H2O is only 104.5°. Explain these deviations from the expected tetrahedral

36. ## science

what would be the complementary strand of DNA be for the following sequence of bases? C T T A G G C T T A C C A I'm stuck please help! my guess was ATTGCCATTGCCA

37. ## Chemistry

What is the volume of a scuba tank if it takes 2000 L of air collected at 1.00 atm to fill the tank to a pressure of 150 atm? T is constant.

38. ## Math

Find the length of the right triangle's other leg. Round to the nearest tenth. SHOW YOUR WORK. LEG=9ft HYPOTENUSE=12ft

39. ## Maths

Minah and rohana had a total of \$338 at first. After minah’s mother gave her another \$49 and rohana spent half of her money, they both had the same amount of money. How much did Minah have at first?

40. ## English

Which type of context clue can be used to determine the meaning of the capitalized word? As the winning team rushed onto the court to celebrate their last-second victory, the losing team headed to the locker room in DEJECTION. Comparison Example

41. ## math

How far from the wall must you place a ladder of length 12m. if the ladder is to touch a point 10m above the ground?

42. ## chemistry

Calculate the heat of decomposition for this process at constant pressure and 25°C. (Look up the standard enthalpy of formation of the reactant and products in the table; ΔH°f(BaCO3(s)) = -1218.8 kJ/mol, ΔH°f (BaO(s)) = -558.2 kJ/mol and ΔH°f

According to "Life Without Gravity" why can astronauts' muscles become weak? a. Without gravity, the blood is rerouted from the legs to the head. b. Without gravity, the body "grows" as much as several inches. c. Without gravity, eating is difficult, so

44. ## English L.A.

Which of the following best describes an expository essay? a. An essay that uses casual, conversational language. b. An essay that tells a story about a real-life experience. c. An essay that explains an idea by breaking it down. d. An essay that uses

45. ## Math

1/2 divided by 1/2=1?

46. ## chemistry

One isotope of a nonmetallic element has mass number 16 and 7 neutrons in the nucleus. The anion derived from the isotope has 10 electrons. Write the symbol for this anion. I thought the answer was O^2- but this isnt correct

47. ## physics

A wire has a resistance of R. What will the wire's resistance be if it is stretched to four times its original length without changing the volume of the wire? (Express in terms of R.) R=V/I; 4R=V/I; R=V/(I/4) I think this is right? help please.

48. ## physics

When 115 V is applied across a wire that is 10 m long, the magnitude of the current density is 1.4*10^4 A/m2. Find the resistivity of the wire. R=V/I; R=pL/A => V/I=pL/A => A(x)V/I(x)L=p :(π(5^2))(115)/(1.4*10^4)(10) Is this right? Do I just plug and chug

49. ## physics

A convex spherical mirror has a radius of curvature of 50 cm. Determine the position and magni cation of the image of an object located 35 cm in front of the mirror. i only know how to do concave mirrors. i have the equations as 1/f=1/d0+1/di for position

50. ## Physics

A boy swings a yo-yo around his head with a force of 50N what is the gravitational force of the yo-yos mass and distance is doubled

Why is the United States often referred to as the melting pot? -Various cultures from many countries have "melted" together to create what America is and how American culture is defined today** -Most American citizens' native customs and traditions will

52. ## Chemistry

AP Chem ---- Which type of radiation is emitted when chromium 51 decays into manganese 51? Show the nuclear equation that explains it.

53. ## Chemistry

AP Chem - Which element is oxidized in the following reaction: CuO(s) + H2 (g)  Cu(s) + H2O (l)

54. ## Chemistry

Which salt would result from the acid-base reaction of phosphoric acid and potassium hydroxide? I already know I will have to write and equation and it with make water (H2O) and a salt. I think it starts like this... H3Po4 + KOH = K2HPO4 + H2O But I'm not

55. ## english

revise the following sentences to eliminate shifts in tense, mood, voice or person. 7. The flight attendant said, "please turn off all electronic devices," but that we could use them again after takeoff. 8. The real estate market was was softer than it has

56. ## Physics

A test car travels in a straight line along the axis. The graph in the figure shows the car's position as a function of time

57. ## Math (Algebra 1)

2y-z --------- for x=-3, y=13, z=5 x

58. ## Chemistry - Mole Ratio

How many moles of oxygen are produced from the decomposition of 3.4g of hydrogen peroxide? How many molecules of O2 are produced?

59. ## Physics

An arrow is shot at a 30 degree angle with the horizontal. It has a velocity of 49m/s. The acceleration of gravity is 9.8 m/s2. How high will the arrow go?

60. ## Physics

A 55.0 kg ice skater is moving at 4.04 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. She then moves in a circle of radius 0.795 m around the pole. (a) Determine the force exerted by the horizontal rope on her

61. ## Calc

The temperature at any point in the plane is given by function f(x,y) = 100/(x^(2)+y^(2)+1). Find a direction at the point (3,2) in which the temperature does not increase or decrease. Help, please? Thank you.

62. ## math

How do areas of two parallelgrams compare when the dimensions of one are three times the demensions of the other?

63. ## math

A= 0.5 m x 20 cm

64. ## algebra

How do you solve the quadratic equation 7x^2-5=0

65. ## Chemistry

The pH of a nitric acid solution is 1.2. What is the concentration of nitrate ion in the solution? Any help would be greatly appreciated, Thank you!!

66. ## English

What's an idiom, simile, or metaphor for getting back at someone?

67. ## earth science

what mountain chain has formed at a divergent plate boundary?

68. ## calculus

You put some ice cubes in a glass, fill the glass with cold water, and then let the glass sit on the table. Describe how the temperature of the water changes as time passes. *as time passes the tempt. rises so the ice cube starts melting, right?

69. ## Math

What is the decimal that is equivalent to three and ten hundredths

70. ## Math

Since B=Ae^kt, Given that there are 350 bacteria present initially and there are 1700 after 4 days , find the number present after 1 week

71. ## Maths

Show that the function f(x) e^xcosx has exactly one turning point when x is between 0 and 90 degrees. Determine the nature of the stationary point . f(x) = e^xcosx, x E Real number

72. ## Math

a) (x-1)root(5-x) dx b) x^2cos3x dx c)(1/x^3) lnx dx

73. ## physical education

1, what is the main purpose of Olympics game? 2, what are the reasons for Olympic game to be largest from all sport events?

74. ## Math

Simplify (1+iroot3)^9 + (1-iroot3)^9 in x+iy form

75. ## Math

If z=costheta +isintheta, prove that a) z = 1/z b) z+1/z = 2costheta c) z-1/z=2isintheta Hence ,deduce that z^2-1/z^2 +1=itantheta

76. ## English

how does word choice matter? Consider academic voice as well as the dialect words used in Amigo Brothers.

77. ## Maths

OABCDE is a right triangular prism with OA = 2units , OD= 2units and AB = 4 units. The unit vectors i,j and k are parallel to OA,OD and OC respectively. a) Find the unit vector parallel to DB.

78. ## Physics

Two car drive along the same road towards each other one at 15m/s and the other 12 m/s. Each car horn sounds at 256 hz. Calculate the feqency of driver of each car?

79. ## science

If you had a sample containing 55 alpha particles, how many protons would be present in that sample?

80. ## Physics

A rocket launched from earth with a rest mass of 150,000Kg moves at 2.8x10^8 m/s during a voyage that takes 1.3 years, according to a clock on board the rocket. a) Using relativity, calculate how long the voyage would take, from earth's reference frame. b)

81. ## Algebra

Simplify x/6x-x^2 I know that the answer is 1/6-x but the answers look like this: A. 1/6-x where x is not equal to 0,6 B. 1/6-x where x is not equal to 6 Please help me with understand why is says x is not equal to, I have like 5 problems just like this so

82. ## Spanish

How are stem changing ir verbs different from stem changing ar and er verbs in the present subjunctive?

83. ## psychology

Please check my answers for these questions, thank you. 1. A case study is A. a study of the legal ramifications of psychological research B. an intensive study of a person or group* C. observation with minimal interference D. a study of a group of people

84. ## Pri 5 maths

Mrs lao bought 5 blouses and 6 skirts for \$108. Three skirts cost as much as 2 blouses. How much did she pay for the 6 skirts?

85. ## physics

A long time after the switch is closed, what is the current in the circuit? A long time after the switch is closed, what is the current in the circuit? - unanswered Check your answer Save your answer You have used 0 of 3 submissions #11B (3 points

86. ## physics

Consider classical electron orbit with radius 53pm (picometers) that has a magnetic moment equal to 2μB (the Bohr magneton). What is the current of that orbiting electron in A?

87. ## algebra 1

70 less than 3x + 10 less than 100

88. ## Science

2. what is a factor that limits a technological design?

89. ## Math

The ratio of the number of men to the number of women in a club is 3:7.There are 12 more women than men.How many members are there altogether?

90. ## Math

Hi! I quickly just need to know what is an irrational number? Thanks! ~Dani

91. ## Math

I have 3 1-6 cubes looking for different ways to roll the sum of 12, How many ways will it be?

92. ## Alegrebra 2

What is an equation of a parabola with the giveb focus Focus:(-2,0)

93. ## Government

The president is the author of the nation's public policies in his or her role of A commander in chief B chief legislator C chief of party D chief citizen

94. ## Mathematics

Hi! I don't understand this Math problem and I was wondering if I could have some help? It would be greatly appreciated! Thanks! C = 5/9(F - 32) The equation above gives the Celsius temperature, C, corresponding to the Fahrenheit temperature, F. Find the

96. ## chemistry

Calculate the work done (in joules) when 5.0 mole of water is frozen at 0°C and 1.0 atm. The volumes of five moles of water and ice at 0°C are 0.0900 L and 0.0980 L, respectively.

97. ## chemistry

Ethanol (C2H5OH) and gasoline (assumed to be all octane, C8H18) are both used as automobile fuel. If gasoline is selling for \$1.45/gal, what would the price of ethanol have to be in order to provide the same amount of heat per dollar? The density and

98. ## Language Arts

Hi. I need to check my answers and I would hate to get them wrong because of one little mistake. Thanks! 1. An argumentative essay should present a clear thesis statement, provide strong evidence to support the thesis, and _____. a. Address

99. ## English

In 'first confession' Gran is described as a ? A. Flat character < B. Round character C. Stock character D. Antagonist < I think it's either A or D... not sure which one