physics( i have no idea how to go about gettign th

163,123 results, page 96

Physics (Angular Momentum)

A solid ball of radius 10cm and mas 8kg rolls in the y direction with a speed of 10 m/s At the instant that it is 3m from the origin along the x axis, what is the angular momentum (mag + direction) about its center of mass?

Physics

Estimate how many molecules of air are in each 2.5 L breath you take that were also in the last breath Einstein took (assumed to be the same volume). (Hint: Assume the atmosphere is about 11 km high and of constant density. Take the temperature of the air to be 27°C.)

Physics

Estimate how many molecules of air are in each 2.5 L breath you take that were also in the last breath Einstein took (assumed to be the same volume). (Hint: Assume the atmosphere is about 11 km high and of constant density. Take the temperature of the air to be 27°C.)

Physics

An astronaut on the planet Vimrom IV finds that she can jump a maximum horizontal distance of 12.00 m if her initial speed is 4.90 m/s. What is the acceleration due to gravity on this planet? In the previous problem, what is the maximum height about the ground reached by the ...

Physics

What can be said about the electric force between two charged particles? a. it is repulsive for unlike charges. b. it varies as 1/r. c. it depends only on the magnitudes of the charges. d. it is much, much greater than the attractive gravitational force.

physics

the rate at which radiant energy from the sun reaches the earth's upper atmosphere is about 1.50kW/m2. the distance from the earth to the sun is 1.50*10^11m, and the radius of the sun is 6.96 * 10^8m. if the sun radiates as an ideal black body (e=1), what is the temperature of...

Overweight/Normal-weight

Compared to overweight people, normal-weight people are ___ likely to engage in eating binges, and ___ likely to experience emotional problems. a. less...more b. less...less c. more...less d. about equally...about equally i chose answer B. because if they were more likely to ...

physics

Many subatomic particles have the same charge as an electron (e) but much different masses. For instance, the muon has the same charge as an electron but its mass is roughly 207 times greater. Explain the changes you would have to make to the e/m tube and Helmholtz coils if ...

literature

Why is the Old Man and the Sea such a good book? I have to do a review on it and I usually like classic books, but I didn't really like this one. Can someone please explain to me what other people like about this book? Thanks!

student questinnaire

what are your limitations? how do you compensate for them? this is something i have never thought about before and i just don't know what my limitations are!!! i need to fill out a school form. it sounds weird but can someone please help me figuring out what 'limitations' can ...

Organic Chemistry Lab

For the "ISOLATION OF CHLOROPHYLL AND CAROTENOID PIGMENTS FROM SPINACH" we have to do a purification scheme and I was wondering what dissolves in hexane out of pigments, water, sugars,and starch. I know that water doesn't, but the pigments does, but what about the other two?

math

the smith family plans to sit down to thanksgiving diiner at 6:00 P.M. they have an 18 pound turkey.the turkey needs to cook about 20 minutes per pound. at what time should the turkey go in the oven? 2:40? how do you find the answer?

Music

I know this is probably a dumb question but I have to write a report on a music artist and I like rock music so I want to know what artist should I choose? Marilyn Manson or Rob zombie? And can someone tell me some stuff about them?

writing or computer

What is the appropriate citation method for your major or course of study? What have you learned about that citation methodology from Lesson Three of this course? Do you think you'll be able to use this citation method effectively to avoid plagiarism? plezs help me i am so lost .

Technology

13. The _____ contains production information about each part used to make a prodcut. a. bill of materials b. specification sheet c. location dimension d. engineering drawing I'm not 100% sure about this question. I know for sure it's not C. I think it is A. Does anyone know ...

Intro to World Religions

Is there anyone here who can explain to me what the Gospel of Thomas and the Gospel of Mary are about? This is part of my first writing assignment in this class and I can't start on it until I understand these two writings. I've read both, but I'm so confused about what's ...

englsih

As my english is not good, could you please check the grammar of the following sentence. Thank you!!! What they care about most are money, stock prices and problems concerning about finance. They may never notice that there are lots of social problems which actually need their...

Spanish

Hi, I would like some tips on what to say when you're talking to a friend about what you're packing & need to buy to go on a trip. This is a conversational piece where it is required that we speak out of context as well (talking about the weekend, activities planned in the ...

health

wat are the 6 nutrients? i need facts about them please help!!!!! carbohydrates, proteins, fats, water, vitamins, minerals thanks i need facts about these nutrients i really need help... :( Thank you for using the Jiskha Homework Help Forum. It is important that you not only ...

economics

4. Consider public policy aimed at smoking. a. Studies indicate that the price elasticity of demand for cigarettes is about 0.4. If a pack of cigarettes currently costs $2 and the government wants to reduce smoking by 20 percent, by how much should it increase the price? b. If...

Physics

Killer whales at Sea Worl routinely jump 8 m above the water. What is their speed as they leave the water to achieve this? I know that h=8m v=? Would I use h=h_0 + v_0t = 1/2 at^2 but the problem would be that I also don't know the time. I am confused about which equation best...

physics

Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the two naturally occurring electrons is removed. The radius of the orbit is 2.65 10-11 m. Determine the magnitude of the electron's ...

physics

A 4.0 kg pulley of radius 0.15 m is pivoted about an axis through its center. What constant torque is required for the pulley to reach an angular speed of 25 rad/s after rotating 6.0 revolutions, starting from rest? What moment of inertia do I use to figure our the torque?

physics

A 16m long ladder is mounted on a fire truck. The ladder itself has mass 130kg , and at the top is a 32kg basket holding a 83kg firefighter. If the ladder makes a 60 degrees angle with the horizontal, what's the magnitude of the net torque about the ladder's base?

Physics

A rectangularplate is rotating with a constant angular speed about an axis that passes perpendicularly through one corner, as the drawing shows.The centripetal acceleration measured atcorner A is n times as greatas that measured at corner B. What is theratio L1 L2 of ...

Physics

A ball of mass 0.1 kg is suspended vertically from the ceiling with a "massless" string and brought to rest. The string is one meter long. When a force of 0.5N is applied 45 deg. below the horizontal, what will be the magnitude of the resulting angular acceleration of the ball...

Physics

Two long, straight, parallel wires carry current in the same direction. If the wires are 24 cm apart and carry currents of 2.0 A and 4.0 A, respectively, find the force per unit length on each wire? I'm not really sure how to go about this. I must be spacing or something.

Physics

Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the two naturally occurring electrons is removed. The radius of the orbit is 2.65 10-11 m. Determine the magnitude of the electron's ...

Physics

Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the two naturally occurring electrons is removed. The radius of the orbit is 2.65 10-11 m. Determine the magnitude of the electron's ...

Physics

Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the two naturally occurring electrons is removed. The radius of the orbit is 2.65 10-11 m. Determine the magnitude of the electron's ...

Physics

Assume the brakes in your car create a constant acceleration of 4.2 m/s2 regardless of your speed. How long does it take to stop if you are initially traveling 50 km/h? What distance do you go while stopping? Repeat the calculations for an initial speed of 100 km/h. What do ...

Physics

How much work does it take for the average person (Weight = 700 N) to climb a 10-story tall building (consider each story to be about 3 m)? What fraction is this of the energy in a typical candy bar? (Ecandy bar = 250 Calories and 1 Calorie = 4186 Joules)

Lang. Arts

Imagine that Emily Costello has written a follow-up article about Bethany. It is called “Still Feeling Complete.” Based on what you read in “A Year of Living Bravely,” and on the title of the follow-up article, what do you think it might be about? A.Bethany’s ...

Literature

American literature homework question: To Kill a Mockingbird? Can someone help me understand the following question, please?: Of all the ways an author has of telling us about a character, how do we learn about the characters in To Kill a Mockingbird? -I want to say it's ...

math-mechanics 1

i solved a)u=2i and b)r=2t+1/2[-0.4(i) 0,2(j)] at c) i don t have idea how to solve At time t = 0, a small boat is at a buoy travelling due east with speed 2 ms−1 . The boat experiences a constant acceleration of (– 0.4i + 0.1j) ms−2 . The unit vectors i and j are ...

physics

an arrow was shot at a suspended clay target. the original KE the arrow was shot with was 2.0 J. the final KE from the arrow-target collision was 0.2 J. What happened to the original KE of the arrow? Give at least four possible ways in which this KE could have been lost. I ...

Math

There are about 3.8 L in 1 gallon about how many gallon equal 570 L

spanish

Escribe el cual (la cual, los cuales, las cuales) o lo cual en el espacio. Nos invitaron a cenar con ellos, ____ fue una buena idea.

pschology

Plaes help me with this I need it as soon as possible... Thanks 1.Choose one of the disorders listed below: •Tourette’s Syndrome •Oppositional Defiant Disorder •Conduct Disorder •Anxiety Disorder •Bipolar Disorder You can choose one for me and do it please. 2.In ...

Question about PC's

i have a question on my assignment that I donot understand. Which high performance processor is the fastest Pentium4 or Itanium4? I know there is an Itanium2. But, there isn't a Itanium4 is there? So, wouldn't Pentium4 be the fastest? Yes, the Pentium 4 at 3.2 Ghz is faster.It...

Human Services

This is late can somebody look at my answers and tell me if they are correct? I have to choose one of the following: A. bandwagon—the idea that “everybody” does this or believes this B. categorical statements—stating something in a way that implies there can be no ...

Ms. Sue

Say you make the following assumptions: 1. Afarmer lives on 1 hen per day for a year. (2.)1 hen eats 25 grasshoppers per day (3.)1,000 grasshoppers have a mass of 1 kg (4.) 1 grasshopper requires about 30g of soy beans per year (5.) 1 human requires about 600 grasshoppers per ...

pleasse check social studies

The type of jurisdiction to consider the decisions of lower courts is known as _______________. (1 point) appellate original limited juvenile*** 2. Which of the following courts would hold jurisdiction over the violation of a parking ordinance in Atlanta? (1 point) superior ...

AP Physics B (Heat Engines)

18. (II) At a steam power plant, steam engines work in pairs, the heat output of the first one being the approximate ehat input of the second. Th eoperating temeprautres of the first are 680 degrees C and 430 degrees C, and of the second 415 degrees C and 280 degrees C. If the...

English

I have to do oral presentation tomorrow representing who I am. i have to bring in 4 things or 4 words to class. The first thing has to be something that represents me, the second thing has to be something that represents my family. the third thing has to be something that ...

psyc 106

A newspaper iditorialist argues that the use of dsm-iv diagnostic labels is destructively antidemocratic, because it enables an elite ccorps of mental health professionals to subtle control the values and life-styles of the rest of the society. i need reason to support this idea

science 1 question

When evolution was first proposed, which of the following was used as evidence to support the idea? A)observations of nature B)laboratory experiments C)extensive fossil collections D)genetic sequences Is it A or C??? I'm very torn between the two. pls help asap! i might post ...

clauses or not

Can someone help me plzzz?!?!?!?!?! Here are some sentences that I have to identify as clauses or not. Notice I have put the words that I have to identify in (): 1. The wide variety of rocks (can make them an interesting subject for study.) not a claus 2. (Diamonds and other ...

english

Am doing Autism and I have to give farther information. Thanks The cognitive part: I have...(1) Selecting attention, I have they absorve things..(2) Concrete processing, i don't have anything for this one. (3) Rote memory: I putted recalling.

Grammar

I haven't heard from you in a long time Write to me How is your family We'redoing fine in Wisconsin Spring is here and it's a lot warmer now Everyone is wearing shorts to school because it's sixty degrees I can't wait for summer You have to see my new skateboard It's the ...

Effective writing skill

renting a tape of the movie Citizen Kane What is your question about this? Thank you for using the Jiskha Homework Help Forum. If you wanat to rent that movie, have you asked a Blockbuster's, Netflix or any other place renting out films?

com 135

You have been asked by a prospective employer to explain in writing why you selected your degree program and how the degree will help advance your career. What two prewriting techniques would you use to organize your thoughts about the topic? Explain your choices

MATH

I have about 30 questions of this, so I need to understand the process. Please make it as detailed as possible! Thank you! Q: To reduce 32 grams of a 25% solution of antiseptic to a 10% solution, how much distilled water should a pharmacist add? A: Equation: _____ Answer is: ...

statistics

if i have k = 36.86 +/- 4.78 and v = 113 +/- 9.92 both using 95% confidence limits and no true values of k or v given am i right in saying that accuracy cannot be determined and that v is a more precise measurement my question was to comment on what can be said about the ...

English

Hi, I have to do a presentation for "A Streetcar Named Desire" on the topic-What does Shep Huntleigh represent for Blanche? Does Williams tell us anything about Blanche through her (both real and fantasy) relationship with him?" Could you help me with this topic and fun ways I...

English

I forgot to include that my students have always got top marks in their exams. Last year the mother-tongue examiner told me that their preparation was excellent! According to the headmaster, the results achieved by the students in their exams are unessential. What do you think...

eng

Imagine that there is a fire in your house or apartment, and you only have 5 minutes to grab your possessions and get out. Everything you leave behind will be destroyed. What would you grab? Why? When you think about what you left behind, are you sad that you lost it or happy ...

small business management

An Internet search for information about franchise businesses will not help you find out A. the number of hours you'll have to put in. B. start-up costs. C. the variety of franchise businesses available. D. support you'll receive from the parent corporation. I think that is A

child development

Which of the following statements concerning the maturation of the reproduction systems is true? A.early menstrual are usually normal.b.in the first months of me strutting girls do not usually ovulate. C. At about 17 boys have their first spontaneous ejaculaTion. I am think c

History (urgent!!)

Hi! I was wondering if anyone could give me specific links to information about Medieval princess/nobility dress...I need to draw a picture and write specific facts about certain parts of the dress. Thanks (:

government

What does it mean when a question is asking about the fundamental elements of American democracy. I am to pick an element of American democracy that I would like to change and why but I am confused as to exactly what it is talking about. Could someone give me an example?

French

I am doing a report about Les Arts in the USA and in Alsace, France. Like music, painting, sculptures etc. Do you guys know of any website with information about the common types of paintings in Alsace or music played?? thanks

math

there are about 20 potatoesin 5 pound bag.A resturant uses about 2 potatoes per order of french fries. How much money does the resturant take in on a day that they use 400 pounds of potatoes

Math

I am asked to graph a triangle with the vertices (-3, 2), (5, 6), and (6, -4) after performing a dilation about the origin of scale factor 4. What does "about the origin" mean? Is this the same as just multiplying the ordered pairs by 4? Are the new vertices (-12, 8), (20, 24...

English

HI tutors, I was watching a video on youtube about BONO (singer) and I don't understand the question in the minute 7´ I would like someone can write me the answer in english thanks Bono Talks About Activism And Family

English

1. On the show, Mattie read his poems and talked about his love for life. 2. On the show, Mattie read his poems and talked about his love abou life. -------------- Which preposition can we use, 'for' or 'about'? Are both OK?

Science Question

How might the most common occurring stars be described, based on our stellar neighborhood? A. White Dwarfs B. K giants C. A main sequence D. M main sequence The most common stars are Red Dwarfs. I don't like the answer choices. Most of them are M type stars. To heat up one kg ...

English: Please Help

I do have some corrections made but my computer wont let me copy and paste the part I did. Please Help. This is the uncorrected version: Scientists report that creatures living in the deep sea are in danger of starving to death. Millions of undiscovered species live, in the ...

math

Daniel scored 162 points playing his video game.he can move to the next level of the game when he earns 275 points exactly. daniel says he needs about 100 points to get to the next level his friend Valerie says he needs about a 120 points to get to the next level explain why ...

Lang arts

which word choice supports the idea that the author has a positive point of view of rolling skating? A. been around since 1700 B. loved winter ice skating C. hard to roll D. more popular p.s I am on connections academy

finances

Calculate the future value of the following: o $5,000 compounded annually at 6% for 5 years o $5,000 compounded semiannually at 6% for 5 years o $5,000 compounded quarterly at 6% for 5 years o $5,000 compounded annually at 6% for 6 year What conclusions can be drawn about the ...

English

Why is it a good idea for a teacher to make their students take turns reading the first couple chapters of a novel out loud as a class before the teacher assings the rest of the novel to be read on their own?

chemistry

For the reaction Al (s) + 3 HCl (aq) à AlCl3 (s) + ₃/₂ H2 (g), it was observed that when 4.00 g of aluminum reacted with excess HCl, exactly 30.0 kJ of heat were released. The DHo for this reaction is a) – 91.3 kJ b) – 120 kJ c) – 202 kJ d) – 7.50 kJ no ...

chemistry

Nitrosyl chloride (NOCl) decomposes at high temperature. The equation is 2 NOCl (g) -> 2 NO (g) + Cl2 (g) at 227C Using delta H = 81.2 kJ and delta S = 128 J/K, calculate the value of the equilibrium constant for this reaction. a 1.60 X 10-2 b. 2.1 X 10-7 c. 62.8 d. 4.9 X ...

chemistry

Nitrosyl chloride (NOCl) decomposes at high temperature. The equation is 2 NOCl (g) -> 2 NO (g) + Cl2 (g) at 227C Using delta H = 81.2 kJ and delta S = 128 J/K, calculate the value of the equilibrium constant for this reaction. a 1.60 X 10-2 b. 2.1 X 10-7 c. 62.8 d. 4.9 X ...

acc/291

I can write the paper I just need some ideas of a situation that might lead to unethical pratices and behaviors in accounting? but not eron I'm sure everyone else is doing that one this is why I need some idea's help please thank you.

english

One possible theme of call of the wild could be that only the strongest survive. Explain how this relates to darwins theory of natural selection and the survival of the fittest. Do you agree or disagree with this idea? Is there one aspect in which you agree but another with ...

Biology

okay, were supposed to answer the following question, i have the basic idea ( i think) and i was just wondering if someone would read over it and what i put and then help out with what im missing Describe humoral immune response in humans. Include the kind of cells involved ...

English check

1. Which description fits the limerick about the fellow named Hall? 1)a poem about something funny with five lines. ****** 2)a serious poem without rhyme 3)a love poem with rhymes and rhythm 4)a poem about nature with three lines 2. The rhythm and rhyme patterns of the ...

Science

Which of the following is true about the electric charges on the objects below The ball on the right has a positive charge and the ball on the left has a negative charge The ball on the left has a positive charge and the ball on the right has a negative charge The balls do not...

Science

1. Which of the following is true about the electric charges on the objects below? a. The ball on the right has a positive charge and the ball on the left has a negative charge. b. The ball on the left has a positive charge and the ball on the right has a negative charge. c. ...

english question

Hello for this sentence: His brother's friend is an aid victim to change it, would I put His brother's friend is a person with aids. we have to change it for people with diseases or disabilities. Thanks You wrote: would I put His brother's friend is a person with aids I think ...

Science-- Physics

Does an object need to have a velocity of 0 meters per second to be in equilibrium and why/why not?

Physics

How do the mainsail and the jib of a sailboat help the boat sail? What do these two sails have to do with force?

physics

What is the frequency of the microwaves in a microwave oven? The wavelength is 12 cm. I have to give the answer in GHz

physics

do all electrons ejected from a metal surface have the same kinetic energy?

physics

which object will have higher inertia a rock of 20kg or a hollow ball of 22kg

physics

i have two kinetic energies and my homework asks for the ratio, K2/K1 Do i just divide them?

Physics

does a baseball thrown at 100 miles per hour have a lot of force?

physics

A ball is thrown straight up with an intial velocity of 85 ft/s. At what times will it have a height of 200 ft?

integrated chemistry and physics

If 2 blocks have the same mass which one has the greater acceleration?

physics 102

What are the wavelengths of electromagnetic wave in free space that have the following frequencies? (a) 3.00 10^19 Hz pm (b) 7.50 10^9 Hz cm

physics

Wind gusts create ripples on the ocean that have a wavelength of 5.00 cm and propagate at 2.00 m/s. What is their frequency?

physics

what is the reasonable temperature (Th anh Tc) for an ideal (caront) refrigerator that have coefficient of performance of 13

Physics

You have a circular table. You measured its radius to be 10 cm with an uncertainty dr =+/- 3mm. The area would be A +/- a cm^2. a. What is A? b. What is a?

Physics

You have a circular table. You measured its radius to be 10 cm with an uncertainty dr =+/- 3mm. The area would be A +/- a cm^2. a. What is A? b. What is a?

Basic Physics

What is the force of gravity between two spheres that have a mass of 8 kg and are separated by 27 m?

physics

If I have 1.5 moles of an ideal gas at a pressure of 3 atmospheres and a volume of 7 liters, what is the temperature?

physics

75 kg block is dropped from a height of 6 m. How much kinetic energy does it have when it has fallen halfway?

Physics

What electromagnetic waves are dangerous for humans and why? I have microwave, xrays....can you help name a few

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