# Posts by Javier

Total # Posts: 64

**Science**

1. What do we call the small wavelength that we can see? 2. How does light travel? 3. What type of lenses are used in a refracting telescope?

**Math**

1 x (4)-8 x 9/-3 This is a question from khan academy and it says the answer is 20. When it shows their work, it shows they are doing the 9/-3 division first, is that correct? Isnt the -8x9 first?

**chemistry**

1.2 mol HCl and 3.9 mol NaOH react to this equation, HCl + NaOH=NaCl + H20 If the limited reactant id HCl, calculate the amount of NaCl formed in moles. Please help and explain how to solve this so I may understand it better please and thank you.

**science**

I believe that our solar system formed by the same process as star formation. A huge cloud of dust and gas collapsed and condensed. Gravity pulled matter into the center core, nuclear fusion began, and our Sun was created. Remaining matter and gas clumped together to form the ...

**Chemistry**

For the reaction, calculate how many grams of the product form when 3.2 g of Na2O completely reacts. Assume that there is more than enough of the other reactant. Na2O(s)+H2O(l)→2NaOH(aq)

**Statistics**

You buy a lottery ticket to a lottery that cost $10 per ticket. There are only 100 tickets available to be sold in this lottery. In this lottery there are one $500 prize, two $100 prizes, and four $25 prizes. Find your expected gain or loss. Do you still want to play raffle?

**Statistics**

You Buy a lottery ticket to a lottery that cost $10 per ticket. There only 100 tickets available to be sold in the lottery. In this lottery there are one $500 prizes, two $100 prizes and four $25 prices. Find your expected gain or loss. Do you still want to play the raffle?

**math**

An ant has 6 legs and a Spider has 8 legs. In a insectarium display, there are some spiders and ants. From these spiders and ants, there are 60 legs altogether. how many spiders and ants could there be?

**English**

He was an outcast... He was isolated from society and eat peanuts

**Holy redeemer**

What is the compound interest on a $40,000 loan @ 16% for 3 years?

**earth science**

the death is a black dwarf

**Math- Vector Calculus**

A manufacturer sells two products, one at a price of $3000 a unit and the other at a price of $12000 a unit. A quantity q1 of the first product and q2 of the second product are sold at a total cost of $5000 to the manufacturer. Express the manufacturer's profit, as a ...

**chemistry**

If you have 22.46 mLs of a gas at STP, how many moles of gas do you have?

**physics**

a projectile with mass (m)=35grams is placed on a vertically positioned spring. the spring constant (k)=6500N/m. the projectile is launched straight up into the air by compressing the spring a distance (x)=8cm.How high does the projectile go?

**physics**

a projectile with mass (m)=35grams is placed on a vertically positioned spring. the spring constant (k)=6500N/m. the projectile is launched straight up into the air by compressing the spring a distance (x)=8cm.How high does the projectile go?

**Alg 1**

-2,-3

**Maths**

Gerry earns $0.60 for every canned drink he sells. He earns an extra bonus of $5 for every 20 cans he sells. How many cans does he sell if he earns $53.40? Kevin and Janet had 480 books in total. After Kevin gave 1/9 of his books to Janet, they had an equal number of books. ...

**Maths**

There are a total of 70 pebbles in Bag A and Bag B. There are a total of 120 pebbles in Bag B and Bag C. Bag C contains 3 times as many pebbles as Bag A. How many pebbles are there in Bag B? There were 27 pineapple tarts and murukus. The ratio of the number of pineapple tarts ...

**Maths**

There were 40 members in a hockey club. 3/8 of them were girls. When more girls joined the club, the percentage of the number of girls increased to 75%. How many more girls had joined the club? Some teachers attended a workshop. They were divided into Group X and Y. The ratio ...

**Maths**

The sum of 5 numbers is p. If each number is increased by 40, what is the new sum of numbers?

**Trig**

It says to evaluate the expression

**Trig**

Sin theta=8/17, theta in Quadrant I, Cos X=-sqrt5/5 in Quadrant II

**Social**

Que tipo de de sistema politico tiene la reina isabel 2

**Calculus**

A tank contains 2920 L of pure water. A solution that contains 001 kg of sugar per liter enters a tank at the rate 4 L/min The solution is mixed and drains from the tank at the same rate. (a) How much sugar is in the tank initially? (b) Find the amount of sugar in the tank ...

**math**

The number is a two-digit number. The number is an even number less than 50. The sum of the digits in the ones and tens places is the double of 5. The tens place digit is less than the ones place digit What is the number?

**business**

whenever a two-tailed test is being conducted, the the rule of thumb requires which signs?

**3rd Grade Math**

5 Arrays 1x16 16x1 2x8 8x2 4x4

**geometry**

FIND THE THIRD ANGLE IN A TRANGLE IF TWO OF THE ANGLES ARE 43 AND 114

**Chemistry**

Please!!! its extremely urgent. i do not need answers, only how to do it A sample of nitrogen gas (N2) kept in a container of volume 10.1 L and at a temperature of 20.3°C exerts a pressure of 3.1 atm. Calculate the number of grams of gas present. Round to one decimal place...

**calculus**

1/tanx + 1/cotx =tanx +cotx verify

**chemistry**

what mass of KOH is reqired to react completely with 2.70g of H2So4 to produce K2S04 and water?

**psychology**

How could an adolescent (aged 12-17) face Erikson’s crisis of Generativity vs. Stagnation, which is typically experienced in middle adulthood (2 pts)?

**Math**

Find the maximum area of a triangle formed in the first quadrant by the x-axis, y-axis, and a tangent line to the graph of y = (x+1)^-2

**history**

create a college that shows how ancient greek culture is reflected in modern-day society.

**chemistry**

A block of metal has a width of 3.2cm, a length of 17.1 cm, and height of 5.2 cm. Its mass is 1.1 kg. Calculate the density of the metal

**Physics**

A copper wire 0.40m long carries a current of 6.0A and weighs 0.35N. What strenght magnetic field is required to balance the weight of the wire?

**Physics**

A wire 75cm long carrying a current of 6.0A toward the north passes through a uniform magnetic field. The magnitude of the force acting on the wire is 0.60N and is directed downward. What is the strengh and direction of the magnetic field?

**Physics**

A 0.50m long wire is carrying a current of 8.0A toward the east. The wire passes through a magnetic field of 0.40T toward the north. What is the force which acts on the wire? What is the direction of the force.

**11th grade Algebra 2**

A large pizza from Papa's Pizzeria has a diameter of 18 inches. If each large pizza is cut into 10 equal slices, what is the approximate area of 3 slices of pizza in square inches?

**11th grade Physics**

What is the potential difference if a resistance of 25 ohms produce a current of 250 amperes?

**11th grade Physics**

What is the current produced by a 9-volt battery flowing through a resistance of 2 x 10^-4 ohms?

**11th grade Physics**

What voltage is necessary to produce a current of 200 amperes through a resistance of 1 x 10^-3 ohms?

**11th grade Physics**

What resistance would produce a current of 120 amps from a 6-volt battery?

**11th grade Physics**

What is the current produced by a potential difference of 240 volts through a resistance of 0.2 ohms?

**11th grade English**

The Book of "The Great Gatsby" Describe the "valley of ashes." What does it look like, and what does it represent?

**11th grade Physics**

How many current paths are there in a parallel circuit connection?

**11th grade Physics**

How many current paths are there in a series circuit connection?

**11th grade Physics**

What happens when an insulator is wired in parallel with the bulb? is the swich open or closed?

**11th grade Physics**

What happens when an insulator is wired in series with the bulb? Is trhe swich open or closed?

**11th grade Physics**

What happens when a conductor is wired in parallel with the bulb? Is the swich open or closed?

**Physics**

What happens to a bulb when a conductor is wired in series with the bulb (bulb lights or dosen't light)? Is the swich open or closed?

**Physics**

How many possible orientations are there in a bulb, battery, and wire are there that don't result in the bulb lighting? Need four of these as drawings.

**ALGEBRA**

These answers are wrong they both can't be traveling at the same speed and one person be traveling father. Plug the answer 14 back into the original problem they both equal 3.

**Spanish**

your vocabulary its ok but u have to chek ur grammar.

**NORCROSS**

Two positive point charges are held in place, 0.80 m apart. They are then moved so that their electric potential energy doubles. What is the new separation between the charges?

**5th grade-math**

Sheila brought $1.95 in coins to spend at the bake sale. Her coins were all in dimes and quarters. The number of quarters she had was two less than the number of dimes. How many of each coin did she have?.

**Math Application**

Here is the raidus of Earth as given in the book: 3960 miles.

**Math Application**

A space camera circles the Earth at a height of h miles above the surface. Suppose that d distance, IN MILES, on the surface of the Earth can be seen from the camera. (a) Find an equation that relates d and h. (b) If d is to be 3500 miles, how high must the camera orbit above ...

**Mathematics**

A space camera circles the Earth at a height of h miles above the surface. Suppose that d distance, IN MILES, on the surface of the Earth can be seen from the camera. (a) Find an equation that relates the central angle theta to the height h. (b) Find an equation that relates ...

**social studies**

How do the three levels of government interact, or inter-relate?

**science**

Does water with salt boils faster than plain water Yes, salt increases the waters boiling point and therefore a higher temperature is needed for the water to boil. Salt does, indeed, increase the boiling point of water due to the salt but it will take longer for the water to ...

**Finance**

In examining the liquidity ratios, the primary emphasis is the firm´s

**math**

how to determine if each pair of ratios form a proportion A sweater is on sale for 52 dollars. If the original price was 78 dollars, what is the percent discount? how much candy