Ashten

Physics is the hardest subject for me I just can't ever understand it. If you want to email me the answers that's fine too, my email is ashtenmccomb@yahoo.com I really need help ):

1.A 500.0 g metal block absorbs 1.125 × 104 J of heat to raise its temperature by 50.0 K. What is the substance?

Show your work.

Specific Heats of Selected Substances

Substance C [J/(kg•K)]

Water (ice) 2,060

Iron 450

Aluminum 897

Gold 130

Copper 385

Silver 235

Ammonia (liquid) 4,700

Water (liquid) 4,180

Water (steam) 2,020

Lead 128

2. A 5.0 Ω resistor is hooked up in series with a 10.0 Ω resistor followed by a 20.0 Ω resistor. The circuit is powered by a 9.0 V battery.

a.) Draw a labeled circuit diagram for the circuit described using correct symbols.

b.) Calculate the equivalent resistance.

c.) Calculate the voltage drop across each resistor in the circuit.

3.A man lifts various loads with the same lever. The distance of the applied force from the fulcrum is 1.00 m, and the distance from the fulcrum to the load is 0.250 m. A graph of resistive force vs. effort force is shown. What is the mechanical advantage of the lever?

What is the ideal mechanical advantage of the lever? What is the efficiency of the lever? Show your work

4.An 800.0 kg roller coaster car is at rest at the top of a 95 m hill. It rolls down the first drop to a height of 31 m. When it travels to the

Ronald Reagan Iran Contra Affair --- What was the constitutional issue involved?

Bill Clinton Impeachment --- What was the constitutional issue involved?

George W. Bush Use of executive privilege --- What was the constitutional issue involved?

Patriot Act --- What was the constitutional issue involved?

Iraq War --- What was the constitutional issue involved?

A 70.0 kg sailor climbs a 28.3 m rope ladder at an angle of 45.0° with the mast. How much work did he do? Hint: The answer is NOT 1,400 J

The forklift exerts a 300.0 N force on the box and moves it 15.0 m forward level into the air. How much work does the forklift do? Hint: The answer is NOT 500J

A sailboat moves north for a distance of 10.00 km when blown by a wind from the exact south with a force of 5.00 × 104 N. How much work was done by the wind? Hint: The answer is NOT 3.54 x 105 J.

I'm only 2% away from passing this semester and I need to correct these problems to get help and pass my class. These are old test questions and she said she would give us back points if we could solve them. Please help me I do not want to fail! Also show work PLEASE

A canoeist on a lake throws a 0.145 kg baseball at 20.0 m/s to a friend in a different canoe. Each canoe with its contents has a mass of 120 kg, and is at rest initially. How fast is the first canoe moving after the pitch, assuming no friction with the water? Hint: The answer is NOT 0.48 m/s

A 10.0 kg cart and a 15 kg cart are locked together with a compressed spring between them. They are then released so that the spring pushes the two carts apart. The 15 kg cart is moving at 3.0 m/s afterward. How fast is the 10.0 kg cart moving? Hint: the answer is NOT 3.0 m/s

A 6,600 kg train car moving at +2.0 m/s bumps into and locks together with one of mass 5,400 kg moving at 3.0 m/s. What is their final velocity? Hint: The answer is NOT -1.0 m/s

A baseball of mass 0.145 kg approaches a bat at 40.0 m/s. After it is hit, the ball leaves the bat at 50.0 m/s directly back. Find the impulse of the bat on the ball. Hint: The answer is NOT 1.45 kg x m/s

A firecracker stuck into a 150 g apple explodes and sends five apple fragments in different directions. The vector sum of momenta 1, 2, 3, and 4 is found from a video of the event to have components px = 1.20 kgm/s, py = 0.80 kgm/s (with

Okay first off if your going to tell me how bad piercing guns are I don't care. I'm using it anyways. I bought a piercing gun off of eBay (one of the cheap metal ones) Most of them come with studs for the gun and I thought mine did too but it doesn't so I'm wondering if anyone knows where I can buy the studs for this piercing gun without having to buy a whole other gun that comes with them.

This is the gun I bought

http://www.ebay.com/itm/NEW-Pro-Steel-Ear-Piercing...

Why should Ronald Reagan have been person of the decade during the early 1990's? How did he impact people and politics?

Can you use a regular earring in a piercing gun or does it have to be a piercing stud? Also if it does have to be a piercing stud where can I get them for a cheap price?

5.Solve { x-2y=2

{3x-5y=9

by writing and solving a matrix equation. Show all your work.

1.What is the electric force between a +2 µC point charge and a –2 µC point charge if they are separated by a distance of 5.0 cm? Show your work. (µC = 1.0 × 10–6 C)

Review the list of events below. All occurred during the 1960s and 1970s and all helped shape the future of the United States. Choose the three events that had the greatest long-term impact on the United States. Explain why you chose each of the three.

• Cuban Missile Crisis

• Vietnam War

• development of the counterculture

• assassinations of John F. Kennedy, Malcolm X, Martin Luther King, Jr., and Robert Kennedy

• antiwar movement

• Watergate

3.A scuba diver uses his waterproof flashlight to shine a beam of light so that it strikes the surface of the water at an angle of incidence θi. Use Snell’s law to find the angle of incidence that would give an angle of refraction for the refracted ray to be directed right along the surface, and show that θi is the same as the critical angle for total internal reflection.

1.“An individual who breaks a law that conscience tells him is unjust, and who willingly accepts the penalty of imprisonment in order to arouse the conscience of the community over its injustice, is in reality expressing the highest respect for the law.”

These words from Dr. Martin Luther King, Jr., capture his philosophy of nonviolent civil disobedience. He believed this was the best, the only, way to achieve the goals of the civil rights movement. Choose at least two events or incidents between the end of World War II and the passage of the Civil Rights Act of 1964. Explain how each exemplifies Dr. King’s message.

2.Television changed the culture of the United States and later the world. Americans began buying televisions in the 1950s, and by the end of the decade, 90% of families owned one.

In the early 1960s Newton Minow served as chairman of the Federal Communications Commission. Later, he was chairman of the board of PBS. He once described television as a “vast wasteland.” He also said, “When television is good, nothing is better. When it's bad, nothing is worse.”

Reflect on this idea as you describe the changes television brought to America during the 1950s, how TV influenced society, and the implications TV would have for the future.

Five waves pass a dock in 2.0 s. If the waves are traveling at 10.0 m/s, then what is the wavelength of the waves?

2.In a thunderstorm at 20.0°C, Karen sees a bolt of lightning and hears the thunderclap 3.00 s later. How far from Karen did the lightning strike? Show your work.

What row is the binomial expansion (x+y)^8 in Pascal's triangle?

1.Franklin Roosevelt promised the American people a new deal. Most believed that he also meant a good deal. Did America get a good deal with the New Deal? Tell ways in which it was a success and which it was not.

2.Franklin Roosevelt’s presidency was the longest in U.S. history. He is famous for the fireside chats that informed and encouraged the American people through the Great Depression and World War II. Suppose you were asked to give your own fireside chat about Roosevelt’s presidency. What would you say?

Okay so I have the opportunity to do extra credit in my Algebra Class but we haven't started on this unit yet so she wants us to Google and ask questions on here to figure out how to do this project. Basically I have to create Pascal's triangle up to the binomial expansion (x+y)^8. I have no idea what row that is can someone explain this to me? I really want to know more about this so I get a good grade with my extra credit! Thank you in advance.

Okay So I had to write a paper in American Literature about A change in American History, so I chose the topic of the Civil War but I really need a thesis statement because I am terrible at these! It should be a fact about the civil war and state my idea about how the civil war has changed American history. can somebody please help!

2.Change abounded between the end of the nineteenth century and the period following World War I. Choose one of the topics listed and describe the transformation that occurred. Be sure to include specific examples in your description.

•Modernism

•The Harlem Renaissance

•The youth culture

I tried to Google it but I couldn't fine anything please help!

2.Change abounded between the end of the nineteenth century and the period following World War I. Choose one of the topics listed and describe the transformation that occurred. Be sure to include specific examples in your description.

•Modernism

•The Harlem Renaissance

•The youth culture

I tried to Google it but I couldn't fine anything please help!