Friday
August 1, 2014

Posts by Demi


Total # Posts: 34

Math - Algebra
In a thin rectangular tin sheet 8x12 sheet, you have to cut a rectangular opening. The area of the opening has to be 45 feet, and its edges have to have an equal distance from the edges of the sheet. Determine this distance.

english
Paraphase - to cut a long story short, one day I decided to be a man about my feelings

chemistry
calculate the hydroxide ion concentration in a solution of almond extract PH.3.8.state if almond is basic or acid

math-Probablity
A student is writing a multiple choice test consisting of 40 questions, each of which provides four possible choices. He is certain that he has 16 questions correct. If he guesses for all of the remaining 24 questions, what is the probability that he will pass the test?

biology
If you toss a coin and it comes up tails on eight consecutive tosses, what is the likelihood it will come up heads on the ninth toss?

Physics
A stone is thrown directly upwards with an initial speed of 34.5 m/s . What is the maximum height the stone will reach?

algebra
The formula b=27a, is used in New England to estimate the minimum furnace output, b, in BTUs, for a modern house with a square feet of flooring. What is the minimum furnace output for BTUs? What is the answer to A? I have searched and listened to all kinds of algebra help webs...

physics
A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 6.6 m/s relative to the ground. When the train moves at a constant velocity, the raindrops make an angle of θ = 36° when they move past the window as...

physics
A rifle is used to shoot twice at a target, using identical cartridges. The first time, the rifle is aimed parallel to the ground and directly at the center of the bull's eye. The bullet strikes the target at a distance of HA below the center, however. The second time, the...

physics
A motorcycle daredevil is attempting to jump across as many buses as possible (see the drawing). The takeoff ramp makes an angle è = 18.0° above the horizontal, and the landing ramp is identical to the takeoff ramp. The buses are parked side by side, and each bus is...

physics
A rock climber throws a small first aid kit to another climber who is higher up the mountain. The initial velocity of the kit is 17 m/s at an angle of 50° above the horizontal. At the instant when the kit is caught, it is traveling horizontally, so its vertical speed is ze...

physics
A bird watcher meanders through the woods, walking 0.45 km due east, 0.60 km due south, and 2.70 km in a direction 37.0° north of west. The time required for this trip is 4.00 h. (a) Determine the magnitude and direction (relative to due west) of the bird watcher's dis...

physics
In a football game a kicker attempts a field goal. The ball remains in contact with the kicker's foot for 0.050 s, during which time it experiences an acceleration of 360 m/s2. The ball is launched at an angle of 46° above the ground. Determine the horizontal and verti...

physics
A sky diver, with parachute unopened, falls 625 m in 15.0 s. Then she opens her parachute and falls another 348 m in 146 s. What is her average velocity (both magnitude and direction) for the entire fall?

physics
A drag racer, starting from rest, speeds up for 402 m with an acceleration of +20.0 m/s2. A parachute then opens, slowing the car down with an acceleration of -5.20 m/s2. How fast is the racer moving 3.75 102 m after the parachute opens?

Organic and Nuclear Chemistry
Regarding nuclear reactions that release a great deal of energy, which statement is true? A. In a fission chain reaction, a uranium nucleus struck by a high-energy neutron emits two neutrons. B. Nuclear fission releases more energy per unit mass than does a fusion reaction. C....

painting
What are some of the charateristics of Baroque Art

Physics
Thank you for any help and assistance. Here is the question/problem: Because of the pressure inside a popcorn kernel, water does not vaporize at 100 degrees Celsius. Instead, it stays liquid until its temperature is about 175 degrees Celsius, at which point the kernel ruptures...

Physics
I'm understanding most of this physics, but here is one last question I would appreciate help on. Thank you! Okay, so the question involves a figure. A link to the question and the picture with it is below can be found by googling the question along with Holt physics. The ...

Physics
I appreciate any help! Thank you!! How much energy must be added to a bowl of 125 popcorn kernels in order for them to reach a popping temperature of 175 degrees Celsius? Assume that their initial temperature is 21 degrees Celsius, that the specific heat capacity of popcorn is...

Physics
A Jeweler working with a heated 47g gold ring must lower the ring's temperature to make it safe to handle. If the ring is initially at 99 degrees Celsius, what mass of water at 25 degrees Celsius is needed to lower the ring's temperature to 38 degrees Celsius?

science
what helps digest your food?

chemistry
Which of the following molecules is polar? 1. CH4 2. BH3 3. NH3 4. CF4 5. H2

Physics
Thanks! I highly appreciate it!

Physics
I'm having trouble with this question. Some __ objects emit no visible light but are known through __ and radio images; satellite observations __ Earth's atmosphere help scientist study space at wavelengths that do not reach Earth's surface. If you can answer it, I...

Religion
Judaism is based on the bond between God and________?

Pre-Algebra
Express as a unit rate: $5 for 10 cans of soup.

Algebra
How long will it take to earn $525 in interest if $3500 is invested at a 6% annual interest rate?

7th grade
8+2=5y-2x

U.S. History
Was Brown v. Board of Education the most important event in breaking down the legal foundations of the Jim Crow system? I want to argue yes, but I can't think of anything creative, only things that are obvious. Any ideas?

space
what are connstellations? thanks. xx.

Science
What Alkalis are there that i would find in my house for like cleaning ect and what is the strongest alkali. thank-you x

eco
That's what I am confused too.

eco
Most countries, including the United States, import substantial amounts of goods and services from other countries. Yet there's also saying that a nation can enjoy a high standard of living only if it can produce a large quantity of goods and services itself. How can you r...

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