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

164,329 results, page 87

AP Physics - Work, Energy, Power

A driver notices that her 1150-kg car slows down from 85 km/h to 65 km/h in about 6 seconds on the level when it is in neutral. Approximately what power (watts and hp) is needed to keep the car traveling at a constant 75 km/h?

college physics

We're talking about induction/inductance/electromagnetic induction. Question: dropping two cylinders through a metal pipe for which one is magnet, one drops quickly and the other slowly. Why?

physics

An athlete at the gym holds a 1.2 kg steel ball in his hand. His arm is 64 cm long and has a mass of 4.0 kg. What is the magnitude of the torque about his shoulder if he holds his arm in each of the following ways? 1. straight but 30 degrees below horizonal?

physics

An athlete at the gym holds a 1.2 kg steel ball in his hand. His arm is 64 cm long and has a mass of 4.0 kg. What is the magnitude of the torque about his shoulder if he holds his arm in each of the following ways? 1. straight but 30 degrees below horizonal?

physics

A 44 m diameter wheel accelerates uniformly about its center from 110 rpm to 320 rpm in 3.9 s. Determine the radial component of the linear acceleration of a point on the edge of the wheel 1.0 s after it has started accelerating.

physics

A 44 m diameter wheel accelerates uniformly about its center from 110 rpm to 320 rpm in 3.9 s. Determine the radial component of the linear acceleration of a point on the edge of the wheel 1.0 s after it has started accelerating.

Physics

A 44 m diameter wheel accelerates uniformly about its center from 110 rpm to 320 rpm in 3.9 s. Determine the radial component of the linear acceleration of a point on the edge of the wheel 1.0 s after it has started accelerating.

physics

A 44 m diameter wheel accelerates uniformly about its center from 110 rpm to 320 rpm in 3.9 s. Determine the radial component of the linear acceleration of a point on the edge of the wheel 1.0 s after it has started accelerating.

Physics

The specific heat capacity of ice is about 0.5 cal/g °C. Calculate the number of calories it would take to change a 4 gram ice cube at absolute zero (-273°C) to 4 gram of boiling water.

physics

A mass M can slide with negligible friction inside a tube bent in a circle of radius R = 1.45 m. The tube rotates about its diameter; the mass is in equilibrium at ¦È = 47.3¡ã. Calculate the number of revolutions the hoop makes in 115 s.

physics

A 36 cm diameter wheel accelerates uniformly about its center from 150 rpm to 360 rpm in 3.6 s. Determine the radial component of the linear acceleration of a point on the edge of the wheel 1.1 s after it has started accelerating.

Physics

In lab tests it was found that rats can detect electric fields of about 5.07 kN/C or more. If a point charge of 1.24 μC is sitting in a maze, how close must the rat come to the charge in order to detect it?

Physics

In lab tests it was found that rats can detect electric fields of about 5.07 kN/C or more. If a point charge of 1.24 μC is sitting in a maze, how close must the rat come to the charge in order to detect it?

physics

he universal law of gravitation describes the force of gravity between two bodies. What does it say about the strength of the gravitational field? How does the size of the object affect the use of the gravitational field equation?

physics

A uniform ladder AB leans against a smooth vertical wall at an angle 60degree to the horizontal.the weight of the ladder is 200N. By taking moments about a suitable point,calculate the reaction at the wall

physics

A uniform ladder AB leans against a smooth vertical wall at an angle 60degree to the horizontal.the weight of the ladder is 200N. By taking moments about a suitable point,calculate the reaction at the wall

Physics

Air consists of molecules of several types, with an average molar mass of 28.95g. About how many molecules does an adult who inhales 0.50L of air at sea level take in? The answer should be 1.3x10^22

physics pls help

Please can someone show me how to go about this problem? The X-Y plane is illuminated by an electric field of strenght given as E=(24î + 60j + 70k) N/C; the flux through a 1.5m² potion of the illuminated plane is

social studies

i have streets but no pavements,i have cities but no buildings,i have forests but no trees,i have rivers but no water. WHAT AM I a map fits

physics

an ostrich can run a maximum speed of 70km per hour. You have to convert the 70km to 70000m. you have to convert the per hour part too and 1hr =60 min. Somehow the time becomes 3600, could someone please tell me how?

Physics

Lake Erie contains about 4.8 x 10^17 grams of fresh water. Assume that the lake has frozen solid and that the ice starts off at -3 C. How much energy would the lake need to absorb from the Sun to cause it to evaporate completely?

7th Grade Science About Mitosis & Meiosis

Hello, I really need help about mitosis and meiosis. So in my project, it asks me to explain three differences between mitosis and meiosis. I only have one difference and this is what I wrote: Mitosis-A type of cell division in which daughter cells are identical to parent ...

Writing

Can you grade me out of 12 points? Did I have any voice? Proofread my writing. A Valuable Item A valuable item is something that’s given to you by a special someone that you will have forever to the end. Many people have valuable items that they love, that don’t cost much ...

7th Grade Journalism/Interview

I had to give an interview to a parent about Teens and Cell phones. I got ten questions, gave the interview, and reported results. Thanks for any and all feedback. Cell Phones and social networking 1) Do you think that teenagers, and kids, need to be more responsible? 2) ...

science(chem)

I have a question about distillation. Or heating in general. When something says heat for 1hr or 1/2 hr do you start counting when you turn on the hotplate? Or do you start counting when the mixture is boiling? I have a feeling that this issue is affecting my yields as I ...

a

Consider what you have learned so far about the use of light in medieval, African, and North American buildings and artworks. Select a specific example, fully identified, and address the following in your discussion posting: How was light and height used in the art and ...

Chemistry

I'm working on single replacement reactions. I know about flipping elements around, like Au+PtF yields AuF+Pt. However, I'm not sure how to do it when there's multiple elements like Al+AgC2H3O2. What would the answer be, and how would you decide what to flip? My other question...

Statistics

Suppose we have yo estimate the average number of purchases in a given hour in a given hour at a convenient store. Using this example describe in your own words how you would go about this determining this average through: A.) Drawing a random sample B.) A Systematic sample C...

physics

How loud is too loud? When is a sound too loud? What can be done about sounds/noises that are too loud for you?

Physics

Object Y is attracted to object B. If object B is known to be positively, what can we say about object A

reading

In this passage I need to find the main idea and 3 supporting details. You have probably gone on a merry-go-around. Theres one at most theme and carnivals. You find a painted horse or other animal. You climb up on its back. Most of the animals are on the poles. The poles go up...

Math

I'm learning about trigonometric functions, and my worksheet instructs me to find the "missing information" for each triangle. For the first one, they give me the length of the hypotenuse (45) and that theta = 35. How can I go about finding the missing info?

Anthro

Discuss how football is a metaphor for American culture, think about all aspects of the game and the culture that surrounds it. What does it tell us about cultural values? Gender? Wealth? Social class? etc...

To: dd -- human services

I've removed your post about evalustion because your question isn't clear and you don't tell what you learned in the multimedia. Please clarify and tell us what you know about the two types of evalustions. We'll be glad to help you when we understand your assignment.

grammar

Can you check this sentence, please? I know a little about helping injured and sick animals from volunteering at the social shelter. I look forward to learning more in school about how to treat animals.

earth science

#26 An inference is_____ A" using your sense to gather data B" a conclusion mad based on data C" a prediction about the results of an experiment D" a persons feeling or judgment about something

Social Studies

Why did the Pilgrims' government come about and why was its existence important. I know this has to do with the Mayflower Compact and was a formal method to establish systematic order among the Pilgrims but not sure why it came about and the importance.

Physics Lab

Hello, we are doing a lab dealing with diffraction gratings. The problem I have is that we are supposed to find the number of slits, N, based on gathered information. I have x, L, d, m, and w, just not N, which is what I am trying to find. I also have the wavelength. Is this ...

English

The best way to buy a car. In the first place, people enjoy the companionship of car. Cars can be helpful in many ways. The best thing they are good for is going places. It is good to know that you have your own car. Owning your own car means not having to call someone for a ...

science (chem)

consider a sample that is a mixture of biphenyl, benzoic acid, and benzyl alchohol. The sample is spotted on a TLC plate and developed in a methylene chloride cyclohexane mixture. Predict the relative Rf values for the three components in the sample. For assistance use the ...

english

I am writing a dialogue between two characters in "Groom Service", I don't know if I am on the right track. I will appreciate it if you culd help me to read through this conversation nad make suggestions. I really appreciate our contributuion. After Martha and Blanche finished...

Physics

A 27-pound meteorite struck a car in Peekskill, NY, creating a dent about 22 cm deep. If the initial speed of the meteorite was 550 m/s, what was the average force exerted on the meteorite by the car?

Physics

In a typical golf swing, the club is in contact with the ball for about 0.0010s. If the 45-g ball acquires a speed of 59m/s, estimate the magnitude of the force exerted by the club on the ball.

Physics

You are a general in the Napoleonic war. The battle has taken you to a trench 7m deep. You have a mortar that will fire an explosive at a speed of 200 m/s at an angle of 80. You have a low flying reconnaissance airplane scouting out the enemy troops at a height of 500 m. Your ...

Physics

You are a general in the Napoleonic war. The battle has taken you to a trench 7m deep. You have a mortar that will fire an explosive at a speed of 200 m/s at an angle of 80. You have a low flying reconnaissance airplane scouting out the enemy troops at a height of 500 m. Your ...

english

We first meet juliet (act 1 scene 3) she has a conversation with her mother about marriage. discuss this. what do we learn about juliet from this? ROMEO AND JULIET

EnGliSh

Is Tintern Abbey - Nature about nature, about human nature, or both? Explain, citing lines from the poem to support your ideas

Math

Here is my question; Business and finance. Julio works as a quality control expert in a beverage factory. The assembly line that he monitors produces about 20,000 bottles in a 24-hour period. Julio samples about 120 bottles an hour and rejects the line if he finds more than of...

health

Post your response to the following: Your cousin Stella, who lives 300 miles away, has smoked nearly a pack a day for about 5 years. Lately, she has been complaining about shortness of breath more than usual, but she does not think she needs to see a doctor. What would you say...

English

I forgot to include the following sentences. They are really urgent! 1) Each of you should choose a group, get a chair and start chatting with that group 2) You divide (yourselves) into groups of four and interview an American student for twenty minutes. When time is over, we'...

English

Need help with some questions! A silent killer is spreading poison across the earth. Rain, polluted by the grass given off by factories and motor vehicles, is becoming highly acidic. This "acid rain" is slowly destroying our environment. Acid rain has already damaged millions ...

Science Help

I am very confused on what I am supposed to do. I have to make a powerpoint about all the steps of mitosis and meiosis in order and explain how they replace old or broken cells. I don't know the steps or if there are four steps or five. Please help!

chemistry

describe how to prepare a .50 m solution of lead nitrate using only 100.00 mls of water. aslo discribe how to prepare a .50m sloution of sodium iodide using only 100.00 mls of water. explain the differences that exist between these two solutions. OK i have answers for both 1....

english1a - topic/thesis

I need to think of an argument to write about before I think of a thesis, our topic has to do with Gender Roles and Society. this is our assignment: Gender Roles Essay Each society has its own definition for the proper roles of men and women, but for the most part these ...

english help!!?!?

Mom smiles sweet as cold cash at each salesman in the carpet & dapery store where they offer my sister & me white mints fat as mushrooms while we walk up and down the aisles trying to make earth match the sky. What does the narrator mean when she says “make earth match the ...

Physics

A car slams on its brakes. When it slammed on its brakes, it was decelerating at 6 m per sec per sec. How high would the car have to fall from to have the same force?

Health

Why do people say that we should have a big breakfast and a small dinner? Thank you for using the Jiskha Homework Help Forum. Think about your car and filling it up with gasoline, etc. before you take a long trip. You need energy to run on as you begin your day. During the day...

History

3. In order to try to gain control over West Berlin, the Soviet Union *A.) set up a total blockade cutting off that section of the city. B.) threatened the section of the city with troops and tanks. C.) operated a massive airlift to bring in needed supplies. *D.) went to the ...

physics

The 4.00-kg block in the figure is attached to a vertical rod by means of two strings. When the system rotates about the axis of the rod, the strings are extended towards the rod and each have a length of 1.25. The length from the upper string and lower string on the rod is 2...

Health-Care

Discussion Questions 1. Have you used information technology in your educational program before? Was there any terminology related to use of technology that you found difficult to understand? While taking this course, were there any terms related to the online medium that you ...

Com 150

Benefits and Tips for going back to college College in and of itself can be overwhelming, let alone all that goes with being in college. While you are focused on succeeding academically, there are might be many parts of your life that can keep you from doing so. By maintaining...

Art Research Paper

It's got to be min. 2 pages. I'm doing it on Andrew Wyeth. This is the only guideline I was given: "As part of your course requirements, you need to choose an artist and research the artist and his or her work." Any ideas on at outline/what I should really focus on? I know I ...

Science-Repost

Describe Earth's rotation in terms of its axis and length of time to rotate. Earth's axis has never pointed in the same direction. It slowly traces a circle every 26 000 years. The tilt of the earth's axis isn't usually pointing straight up. It traces a circle and it tends to ...

English

Can you please help me check these sentences? Thank you very much. 1) We have fifty-five minute lessons except for the first and the last lesson which last sixty minutes 2) I have 5 hours of lesson on Mondays, Tuesdays and Thursdays. I have afternoon lessons only (?) on ...

science

When you use a graph to solve a problem about how far a car traveled during a specified time during which it was accelerating, how many area caculations do you have to make? What is/are the shapes/shapes ou are calculating?

misc

is there any way to dye your hair without waiting so many hours i have asked before and GuruBlue told me about shampoo and food coloring which takes 8-12 hours. i was wondering if there was a quicker way and with what? thanks -MC

English

I have a question. I wrote a research paper and used MLA. I referenced from a book three different times in my paper. When I do my work cited page in the end, how do I go about the page numbers?

English

I have a question. I wrote a research paper and used MLA. I referenced from a book three different times in my paper. When I do my work cited page in the end, how do I go about the page numbers?

science

Fill in the blank... The amount of volume an object displaces in water is _____(less than/equal to/grater than) the volume of the object. please help cazz im going to have a test tommorrow about this ;)

finance

You have an investment opportunity which yields 9% per year. About how many years will it take your initial investment of $10,000 to grow to a total of of $40,000? Please give your answer as a whole number

math

The Floor To Be Tiled Is A Rectangle I want To Know The Approximate Area Of The Bathroom Floor i Have String Handy And i Know That The Length of my tennis shoe is about 1 foot how can i find another way to describe the area of my room ?.

English

In English, we're learning about the Holocaust and we are answering to "related-to-your-life" questions and below are some questions that I do not understand. Please help! Thank you. Does the U.S. control any countries? Do we have a Chancellor of the US? Who could be re-...

trig

a kite is flying at an angle of elevation of about 40 degrees. all 80 meters of string have been let out. ignoring the sag in the string, find the height of the kite to the nearest 10 meter

Chemistry

If you wanted to make a barometer that had a column of liquid about 6ft tall what would the density of the liquid have to be? 1meter=3.28ft 1in=2.54cm Density Hg=13.6g/ml 1atm=760torr

Persuasive Essay

Will someone help me organize my persuasive essay? I've decided to write about the FITNESSGRAM and why high shcool students who have taken the required courses of physical education should be exempt from it.

life orantation

Make six suggestions on how to combat the violations of human rights identified by you in the previous questions and indicate any organisations you have come about in your research and indicate how they combat the discriminations.

Geology

Hi there I'm having trouble with this study guide. Could someone please help me? You’ve returned from a recent geologic expedition and discovered that the security at the airport has dumped out all of your carefully sorted rock samples into a heap. You need to quickly sort ...

Pre-Algebra

1.)Identify the underlined place in the decimal number 83.5 8 41.Round the number to that place. a.)thousandths;83.58 b.)hundredths;83.59 c.)hundredths;83.58 d.)thousandths;83.59 2.)Estimate $5.56 + $13.02 using front-end estimation. a.)about $19.60 b.)about $18.60 c.)about $...

Math

The diameter of a tire is 2.5 ft. a. Find the circumference of the tire. b. About how many times will the tire have to rotate to travel 1 mile? (1 mile = 5,280 ft)

Math

During an average lifetime, a person sheds about 40 pounds of dead skin. In the United States, life expectacy for men is about 73.6 years. Life expectancy for women is about 79.2 years. How many pounds would a man shed in a month and how many pounds would a women shed in a ...

math

ok i have 10th grade math next year and i don't even know half the stuff for this year and its summer brake and im worrying about math..what do i do

sequnces

my teacher said to find out about a sequce and find the man it is named after . it is 1,1,2,3,5,8,13,21........ and i have got to find out the rest

Chemistry

I am about to do an extraction experiment, and needed help with a question to improve my understanding. Any help appreciated. 1. You have 150 ml of a solution of benzoic acid in water estimated to contain about 5g of the acid. The distribution coeffcient of benzoic acid in ...

Physics- drwls please help

(a) Calculate the kinetic energy that the earth has because of its rotation about its own axis. Assume that the earth is a uniform sphere and that its path around the sun is circular. For comparison, the total energy used in the United States in one year is about 9.33 109 J. (...

response to dr. bob

Sorry i'm a new student on this site i had no idea but when the next time in the future when I need this site again I will remember sorry for the confusion thanks.

business

Is it a good idea to open American fast food restaurants in Disney parks overseas selling the same kind of food sold in U.S. parks? Why or why not?

bus.

Is it a good idea to open American fast food restaurants in Disney parks overseas selling the same kind of food sold in U.S. parks?

Geometry 1 question

Find the image of O(-2, -1) after two reflections, first across the line y = -5 and then across the line x = 1. (-2, -1) (-1, -6) (4, -9) (1, -5) I am very confused, no idea what this means. Please help? Thanks

math

3 boxes are in a room. You know that one contains apples, one contains oranges, and one contains both apples and oranges, nut you don't know the contents of the specific boxes. The boxes are labeled, "apples," "oranges," and "apples and oranges," but each box has the wrong ...

Physics

This is about the questions again -- can you tell me if I worded this right and you can figure out the answer to the question with the info provided? Thanks!! A bullet is speeding at 250 m/s and it punctures an apple at rest. With the bullet inside the apple, the apple and the...

English

I urgently need you to check the following sentences on job satisfaction.Thank you. 1) This newspaper article is about job satisfaction. It claims that the root of job satisfaction lies in your attitude and expectations. 2) First, it is essential to consider the kind of ...

Canadian Pacific Railway

How did the CPR employment practices discriminate agnst Chinese workers? Why do you suppose Chinese railway workers decided to remain separated from the other workers? They were paid 1 dollar a day for the work they did, which was less than half the salary paid to white ...

Probability

You have a blind date with a physics major. From your social networking experience, you know that 10% of physics majors are immature, 50% are narcissistic, and 90% are boring. Assume that immaturity, narcissism, and boringness are independent events. Calculate the probability ...

english

i have to act out the first half of act3 scene 5 in romeo and juliet and i have to have some props. does anybody have any ideas for what i could use?

Counting and Probability

Suppose I have a bag with 10 slips of paper in it. Eight of these have a 2 on them and the other two have a 4 on them. How many 4's do I have to add before the expected value is at least 3.5?

Chemistry

Explain the following observations using chem principles: When table salt and sugar are dissolved in water, it is observed that: 1. Both solutions have a higher boiling point than pure water. 2. the boiling point of .1 M NaCl solution is higher than that of .1 M C12H22O11 ...

math

To purchase your first home, you may be required to borrow funds from a bank. You have just graduated from college, and your dream is to own your first home. Before you begin looking for your dream home, you need to learn more about funding options and the process required to ...

science

After reading about the Malaria problem in North Borneo and the subsequent attempts to eliminate it, do you believe the beneficial effects of spraying pesticides on Sabah outweighed the resulting unexpected and harmful effects? What do YOU believe? If you'd like to post your ...

CIS 105

As you have discovered, there are a variety of computers available, from the smallest computer in a domestic device to the supercomputers used in industry. Despite the different uses of computers, they all have basics elements in common—each computer system involves hardware...

Human Services

Develop a number of hunches about the clients in the following vignettes. What is the basis of your hunch (theory, experience, knowledge about social conditions, etc.)? Leah is a 13-year-old runaway living on the streets with a group of three other teens. They show up at the ...

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