# Demi

Most popular questions and responses by Demi
1. ## 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

2. ## 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

3. ## 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

4. ## 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

5. ## chemistry

How many grams of NH4Cl will dissolve at 50 degrees C?

6. ## 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

7. ## 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

8. ## algbra 1

A farm has only sheep and geese. It has a total of 58 animals and a total of 150 legs on the animals. How many sheep and geese are on the farm?

9. ## chemistry

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

10. ## math

if a car drives at a speed of 90km/h for 2 hours and 20 minutes. How far does the car drive?

11. ## 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

12. ## math

A ship sails due north from a position 5 degrees, 28' South Latitude to position 6 degrees, 43' North Latitude. Given that one minute of latitude is equivalent to 1 nautical mile, the ship has sailed a distance of A. 75 nautical miles B. 371 nautical miles

13. ## 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

14. ## 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?

15. ## 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

16. ## 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?

17. ## 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

18. ## 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

19. ## 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

20. ## 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?

21. ## 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

22. ## 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

23. ## Religion

Judaism is based on the bond between God and________?

24. ## Pre-Algebra

Express as a unit rate: \$5 for 10 cans of soup.

25. ## History

Compare and Contrast the similarities and differences of the Universal Declaration of Human Rights and The Declaration of Independence

26. ## Physics

A girl at a ropes course pulls herself upward using a cage and pulley system. There combined mass is 64 kg. A)Calculate the force she pulls down with to raise herself at constant speed. B)Calculate her acceleration if she increases her force by 8%.

27. ## Physics

A spring with a spring constant of 531 N/m is used to propel a 0.363-kg mass up an inclined plane. The spring is compressed 37.7 cm from its equilibrium position and launches the mass from rest across a horizontal surface and onto the plane. The plane has

28. ## physics

A 3kg mass is attached to end of a light rod and made to move clockwise in a vertical circle of radius 2m and speed of 6m/s. The tension in the rod at the lowest point is most nearly A. 54N B. 84N C. 30N D. 24N E. 39N

29. ## Physics

Determine the coefficient of friction between a girl's skis and the snow when she skis down a 20° degree hill and her ending speed is exactly two-fifths of what it would have been if the slope had been frictionless.

30. ## 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.

31. ## chemistry

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

32. ## 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?

33. ## Calculus

Kayla claims that she can find an approximate value for sin 1o without using a machine to do any computations. Explain or show how she can do this (Hint: if you choose to explain the process, please be very specific. If you choose to show how it is done,

34. ## Physics

A 2kg mass moving at 10m/s slows to speed of 4m/s while sliding across a rough horizontal surface. The work done by friction is most nearly A. 116j B -116J C. 84j D. -84j E. -16j

36. ## 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

37. ## maths

I am equipment to 1/2 The sum of my numerator and denominator is 15 What fraction am I ?

38. ## Social Science

Where can I find information on the difference between English policing and American policing, without using wikipedeia? I found some information but is not showing a difference. Thank you

39. ## Calc

Find the x–coordinate of the point on the parabola y=x^1/2 nearest to the point (4, 0).

40. ## english

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

41. ## space

what are connstellations? thanks. xx.

42. ## Calc

Find the x–coordinate of the point on the parabola mc002-1.jpg nearest to the point (4, 0).

43. ## painting

What are some of the charateristics of Baroque Art

8+2=5y-2x

45. ## 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?

46. ## 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

1. ## Maths

8.14

posted on November 5, 2016
2. ## Human Growth and Reproduction

we have the name!!!!!

posted on March 23, 2016
3. ## health

Me too!!

posted on March 23, 2016
4. ## Human Growth and Reproduction

yes, divide is correct

posted on December 16, 2015
5. ## math

100 pennies

posted on April 15, 2015
6. ## Social Science

Hello Thank you for your help

posted on November 22, 2014
7. ## health

C

posted on October 17, 2014
8. ## math

thank you. i understand it better now

posted on August 14, 2014
9. ## Physics

Thanks! I highly appreciate it!

posted on January 1, 2010
10. ## Algebra

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

posted on May 19, 2009
11. ## eco

That's what I am confused too.

posted on November 2, 2008