Thursday

April 24, 2014

April 24, 2014

Total # Posts: 69

**math**

what is tan(A-B) if SinA=1/2, cosA>0, tanB=3/4 and sinB<0

**physics**

A solid block of mass m2 = 1.0 $kg$, at rest on a horizontal frictionless surface, is connected to a relaxed spring (with spring constant k = 260 N/m whose other end is fixed. Another solid block of mass m1 = 2.4 kg and speed v1 = 3.3 m/s collides with the 1.00 kg block. If t...

**math**

Find the sum of the squares of the deviations from the mean of a series of ACT scores: 24,17,27,25,22

**math**

4

**english**

In " At the Tourist Center in Boston," the speakers tone can best be identified as?

**english**

In " At the Tourist Center in Boston," the speakers tone can best be identified as?

**Chemistry**

A solution of an unknown base has a concentration of 0.250M, and a pH of 12.72. Calculate Kb for this base.

**math**

Video games are on sale for 25% off. If a particular game regularly sells for $59.50, what is the sale price?

**life orientation**

Ways in which one can take responsibility to provide safe and healthy living environment?

**science**

HOw would you attempt to isolate and identify a bacterial infection acquired on another planet

**Trig**

Sin^2 b(1 +cot^2 b) =1

**Calculus **

For the following demand equation compute the elasticity of demand and determine whether the demand is elastic, unitary, or inelastic at the indicated price. (Round your answer to three decimal places.) x + (1/9)p - 27 =0 ; p=23

**Math**

For the following demand equation compute the elasticity of demand and determine whether the demand is elastic, unitary, or inelastic at the indicated price. (Round your answer to three decimal places.) x + (1/9)p - 27 =0 ; p=23

**eco**

d

**health**

The answer is D

**7th Science**

0.63

**Chemistry**

X= 5.9089

**physics**

The drawing shows a person looking at a building on top of which an antenna is mounted. The horizontal distance between the person's eyes and the building is d = 83.0 m. In part a the person is looking at the base of the antenna, and his line of sight makes an angle of ...

**algebra 2**

You and your friend are both knitting scarves for charity. You knit 8 rows each minute and already have knitted 10 rows.Your friend knits 5 rows each minute and has already knitted 19 rows. When will you both have knitted the same number of rows?

**math**

hey thanks we are checking it now:)

**math**

a particle moves along the curve y= sqrt 1+x cubed. As it reaches the point (2,3) the y-corrdinate is increasing at a rate of 4cm/s. How fast is the x-coordinate of the point changing at that instant?

**chemistry**

Pressure cooker is 1.3atm what is the temperature of water that boils

**AP US History**

I am writing an APUSH DBQ and I have what I think is a pretty winning thesis but I am having problems coming up with a good, interesting opening sentence. I figure once I have the first paragraph figured out the rest will flow rather easily. I also need to figure out a sentenc...

**physics**

A vector representing 140 N is oriented at 42◦ with the horizontal. What is the magnitude of its horizontal component?

**college chem**

How many moles of O are needed to combine with 0.223 mole of C to form the following compounds? CO CO2

**chemistry **

How many moles of O are needed to combine with 0.223 mole of C to form the following compounds? CO CO2

**Chemistry**

if 130 g of KNO3 are added to 100 g of water at 40 degrees Celsius.How many grams do not dissolve?

**chemistry**

Glycerin, C3H8O3, is a nonvolatile liquid. What is the vapor pressure of a solution made by adding 164 g of glycerin to 325 mL of H2O at 39.8°C? The vapor pressure of pure water at 39.8°C is 54.74 torr and its density is 0.992 g/cm3.

**Chemistry**

2.311023x

**physics**

if i throw a 2kg glob of clay and hit a wall at 3 m/s, how much momentum do i impact to the clay/wall? why?

**science**

Which cavity consists of the cranial cavity and vertebral canal? the dorsal or the ventral?

**Number Theory**

BTW 1 and 10 = 1 BTW 1 and 100 =10 BTW 1 and 1000= 100 BTW 1 and 10000 = 1000 Am I following this correctly

**Number Theory**

Can someone help me with this question How many integers from 1 to 10000 inclusive, are multiples of 2 and 5?

**Number Theory**

How Do you expand (4x+3y+3z)^6?

**matt/116**

two angles are complementary. The sum of the measure of the first and the one-fourth of the second angle is 62.25 degrees find the measures of the angle.

**chemistry**

Which would produce greater number of moles of product: a certain amount of hydrogen gas reacting with oxygen gas to make water, or the same amount of hydrogen gas reacting with nitrogen gas to make ammonia? Why?

**Physics**

The displacement of a standing wave on a string is given by D=3.6sin(.54x)cos(37t), where x and D are in centimeters and t is in seconds. What is the distance in cm between the nodes in centimeters? Give the amplitude of each of the component waves, meaning that there two, in ...

**math**

Helppp me! Need this in about 10 min. earlier the better!!!! pleaseee:) anyways... neg. 9/10 plus neg. 1/6 =?

**Math**

What is neg. 9/10 + neg. 1/6? Pleaseee help im stuck:/

**physics**

so the answer to a should be -14.9 m/s and c should be -.08?

**physics**

okay i got the answer to b. now is a v(2)= vo+(9.8)(2) or v(2)= vo -(9.8)(2)?

**physics**

i still cant do it

**physics**

A helicopter is rising at 4.7 m/s when a bag is dropped from it. (Assume that the positive direction is upward.) (a) After 2.0 s, what is the bag's velocity? (b) How far has the bag fallen? (c) How far below the helicopter is the bag?

**science**

A rectangular brick measures 6cm by 9cm by 20cm and has a mass of 2.563 kilograms. Calculate the bricks volume in cubic centimeters, and cubic milimeters

**math**

4-(-h)=68

**English**

Here is my thesis can you please help: Even thought childhood obesity is not only the parents' fault but the child's as well, having a strong parent who help promote healthy eating and exercise can help with the health problems that will occur during there lifetime. Ch...

**English**

I need help on formulating this into a paper that has to be 1500 words: I.Being a strong supportive parent can become tough especially if you’re a single parent. A.Some parents may have to work long late hours. 1.The obese children will eat whatever they like since they a...

**math**

1 is tillien datime 2 is gordon bluddy

**Physics**

29cm at 59 degress North of East

**pre alg**

How do u find the GCF with exponets in a 7th gr. pre alg. class?

**trig**

how do i do this? give the signs of the six trig functions for each angle: 74 degrees?

**english 1**

i have to do a paragraph and i have to write bout if i can change one thing wat wood it be and three reason ill take anything

**algebra**

how to do unit rate $60 for 8 h there is more like 3/4lb and 861bagels/3d and 850cal/1.25h

**chemistry**

What does the statement" The properties of salt are different from the properties of the elements that go into making them" mean?

**language arts**

retribution means the opposite of distribution or collection.

**algebra 1**

what is the area of the largest circle that will fit in a square with area 64cm squared? EXPLAIN. please help this stumped me

**Science**

umm what is photosynthesis correct me if im wrong they use it as food combining sun and water to create a sugary substance they use as food.

**science**

I don't know but i have the same question on my homework and i cant find it anywhere.

**Architecture**

When you draw an elevation from a floorplan, how do you determine the vertical height of windows and doors?

**chemistry**

i have this same homework problem

**chemistry**

thank you but the set up for the total valance electrons is confusing?

**chem**

also what does it mean when they say write the abbreviated notation (based on noble gas) for s? how do i begin to do this

**chem**

thanks

**chem**

also what does it mean when they say write the abbreviated notation (based on noble gas) for s? how do i begin to do this

**chem**

what is the spdf electron configuration for s? i got [NE]3s23sp4 as an answer is this correct?

**Math**

A triangular garden plot has one 16 foot side. The height perpindicular to that side is 12 feet 6 inches. If each plant requires 36 sq. in. of space, how many plants can be placed in the plot? Divide the area of the triangle by the area required per plant. That will give you t...

**Science**

What's the number of stage micrometer units in 10 ocular units using 4x, 10x, and 43x objectives ?

**Neon**

gas

**math**

a manufacturer's cost is given by C= 300 cube root of n + 1200, where c is the cost and n is the number of parts produced. find the cost when 8 parts are produced. help please!!!! We have C = 300n1/3 +1200 Substitute 8 for n to get C = 300*81/3 +1200 You should know that 2...

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