Friday

April 18, 2014

April 18, 2014

Total # Posts: 1,513

**physics**

Legend has it that Isacc Newton was hit on the head by a falling apple, thus triggering his thoughts on gravity. Assuming the story is to be true, estimate the speed of the apple when it struck Newton.

**physics**

bill steps off a 3.0-m-high diving board and drops to the water below. At the same time Ted jumps upward with a speed of 4.2 m/s from a 1.0-m-high diving board. choosing the origin to be at the water's surface and upward to be the positive direction, write x-versus-t equat...

**physics**

the first active volcano observed outside the earth was discovered in 1979 on Io, one of the moons of jupiter. the volcano was observed to be ejecting material to a height of about 2.00x10^5m. given that the acceleration of gravity on Io is 1.80 m/s^2, find the initial velocit...

**physics**

seagulls are often observed dropping clams and other shellfish from a height to the rock below, as a means of opening the shells. If a seagulls drops a shell from rest at a height of 14m, how fast is the shell moving when it hits the rock?

**physics**

Legned has it that Isacc Newton was hit on the head by a falling apple, thus triggering his thoughts on gravity. Assuming the story is to be true, estimate the speed of the apple when it struck Newton.

**phyics (PLEASE PLEASE READ)**

a bicyclist is finishing his repair of a flat tire when a friend rides by at 3.5 m/s. two seconds later, the bicyclist hops on his bike and accelerates at 2.4 m/s^2 until he catches his friend? (a) how much time does it take until he catches his friend? (b) how for has he trav...

**phyics (PLEASE PLEASE READ)**

a model rocket rises with constant accerleration to a height of 3.2 m, at which point its speed is 26.0 m/s. (a) how much time does it take for the rocket to reach this height? (b) what was the magnitude of the rocket's acceration? (c) find the height and speed of the rock...

**physics (PLEASE PLEASE READ)**

referring to the previous problem, if you had entered the same sandy patch with a lower speed, say 7.0 m/s, would the patch have the same effect on your speed, say 7.0 m/s, would the patch have the same effect on your speed? that is, assuming the sandy patch causes the same ac...

**physics (PLEASE READ)**

when a chameleon captures an insect its tingue car extend 16 cm in 0.10 s. (a) Find the magnitude of the tongue's acceleration, assuming it to be constant.(b) In the first 0.050 s, dones the tongue extend 8.0 cm, more than 8.0 cm, or less than 8.0 cm? Support your conclusi...

**physics (PLEASE READ)**

referring to the previous problem, if you had entered the same sandy patch with a lower speed, say 7.0 m/s, would the patch have the same effect on your speed, say 7.0 m/s, would the patch have the same effect on your speed? that is, assuming the sandy patch causes the same a...

**physic (PLEASE READ)**

a model rocket rises with constant accerleration to a height of 3.2 m, at which point its speed is 26.0 m/s. (a) how much time does it take for the rocket to reach this height? (b) what was the magnitude of the rocket's acceration? (c) find the height and speed of the rock...

**physics( PLEASE READ)**

a bicyclist is finishing his repair of a flat tire when a friend rides by at 3.5 m/s. two seconds later, the bicyclist hops on his bike and accelerates at 2.4 m/s^2 until he catches his friend? (a) how much time does it take until he catches his friend? (b) how for has he trav...

**physics**

a bicyclist is finishing his repair of a flat tire when a friend rides by at 3.5 m/s. two seconds later, the bicyclist hops on his bike and accelerates at 2.4 m/s^2 until he catches his friend? (a) how much time does it take until he catches his friend? (b) how for has he trav...

**physics**

a model rocket rises with constant accerleration to a height of 3.2 m, at which point its speed is 26.0 m/s. (a) how much time does it take for the rocket to reach this height? (b) what was the magnitude of the rocket's acceration? (c) find the height and speed of the rock...

**physics**

referring to the previous problem, if you had entered the same sandy patch with a lower speed, say 7.0 m/s, would the patch have the same effect on your speed, say 7.0 m/s, would the patch have the same effect on your speed? that is, assuming the sandy patch causes the same ac...

**physics**

when a chameleon captures an insect its tingue car extend 16 cm in 0.10 s. (a) Find the magnitude of the tongue's acceleration, assuming it to be constant.(b) In the first 0.050 s, dones the tongue extend 8.0 cm, more than 8.0 cm, or less than 8.0 cm? Support your conclusi...

**physics**

A person is riding a bicycle, the wheels of a bicycle have an angular velocity of +24.0 rad/s. Then, the brakes are applied. In coming to rest, each wheel makes an angular displacement of +16.0 revolutions. (a) How much time does it take for the bike to come to rest? s (b) Wha...

**physics**

You are driving through town at 12.0 m/s when suddenly a ball rolls out in front of you. You apply the brakes and begin decelerating at 3.5 m/s^2.(a)How far do you travel before stopping?(b)When you have traveled only half the distance in part(a), is your speed 6.0 m/s, greate...

**physics**

starting from reast a boat increases its speed to 4.12 m/s with constant acceleration. (a) what is the boat's average speed? (b) If it take the boat 4.77s to reach this speed, how for has it traveled?

**physics**

On october 9,1992, a 27 pound meteorite struck a car in peeskill,NY leaving a dent 22 cm deep on the trunk. If the meteorite struck the car with a speed of 550 m/s, what was the magnitude of its deceleration, assuming it to be content?

**physics**

Air bags are designed to deploy in 10 ms. Estimate the acceleration of the front surface of the ba as it expands. Express your answer in terms of the acceleration of gravity g.

**physics**

A child slides down a hill on a toboggan with an acceleration if 1.5 m/s2^2. If she starts at rest, how far has she traveled in (a) 1.0s,(b) 2.0s, and (c) 3.0s?

**physics**

when you see a traffic light turn red you apply the brakes until you come to a stop. if your initial speed was 12 m/s, and you were heading heading due west, what was your average velocity during braking? Assume constant deceleration.

**Chemistry**

how many grams of solid iodine are produced by the decompostion of 2.1 g of hydrogen iodide gas?

**business math 141**

Two machines turn out all the products in a factory, with the first machine producing 45% of the product and the second 55%. The first machine produces defective products 8% of the time and the second machine 9% of the time What is the probability that a defective part is prod...

**physics**

Two balls are approaching each other head-on. Their velocities are +9.30 and -12.1 m/s. Determine the velocity of the center of mass of the two balls for the following conditions. (Use the sign of your answer to indicate the direction.) (a) They have same mass. m/s (b) The mas...

**Physics**

A car (mass = 1070 kg) is traveling at 40 m/s when it collides head-on with a sport utility vehicle (mass = 2570 kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. At what speed was the sport utility vehicle traveling?

**Physics**

Car 1 has a mass of m1 = 65 103 kg and moves at a velocity of v01 = +0.78 m/s. Car 2, with a mass of m2 = 92 103 kg and a velocity of v02 = +1.4 m/s, overtakes car 1 and couples to it. Neglect the effects of friction in your answer. (a) Determine the velocity of their center o...

**social studies**

anyone?

**social studies**

what are three things that theodore roosevelt feared? what are three thing that theodore roosevelt would like to do?

**physic**

Before practicing his routine on the rings, a 67 kg gymnast hangs motionless, with one hand grasping each ring and his feet touching the grounnd. Both arms make an angle of 24 degrees with the vertical.(a) If the force exerted by the rings on each arm has a magnitude of 290 N,...

**physics**

An object acted on by three forces moves with constant velocity. one force acting on the object is in the positive x direction and has magnitude of 6.5 N, a second force has a magnitude of 4.4 N and points in the negative direction. Find the direction and magnitude of the thir...

**English**

What are some alliteration for tigers?

**trig**

L ii i i i i i i i i A i i i i i i i i i i 4000 miles i i i i E ii right triangle have to find side EL. The range of a lighthouse is the maximum distance at which its light is visible. In the figure, point A is the farthest point from which it is possible to see the light at ...

**trig**

Since its construction in 1821, Marblehead Lighthouse has stood at the entrance to Sandusky Bay, guiding sailors along Lake Erie’s rocky shores. The 65-foot tower is one of Ohio’s best-known landmarks and the oldest continuously operating lighthouse on the Great Lake...

**trig**

The Hall of Fame exhibits are displayed in an eight-story, 162-foot tower. Pei originally designed a 200-foot tower, but had to reduce its height to meet the requirements of a nearby airport. From the top of the existing tower, an observer sights the entrance to the museum...

**Algebra 2**

Factoring 6p^4-13p^3q^2-28p^3 I have come up with (3p^2 + 4q)(2p^2 -7q^2q

**math**

Mary and four of her friends earn a total of $152 doing odd jobs this weekend. The girls decide to treat themselves to lunch, and then donate the remainder of the money to a disaster relief fund. Write and solve an algebraic equation to determine the total cost of the lunch if...

**chemistry**

Now take another 35 mL of the 0.50 M pH 6.59 buffer and add 1.5 mL of 1.00 M NaOH. Using steps similar to those above, calculate the new pH of the solution. find pH

**physics**

A loaded penguin sled weighing 75 N rests on a plane inclined at angle θ = 24° to the horizontal (Fig. 6-28). Between the sled and the plane, the coefficient of static friction is 0.25, and the coefficient of kinetic friction is 0.13. (a) What is the minimum magnitude...

**3RD GRADE MATH**

David also bought 94 stickers. He bought 2 strips of 10 and many singles. How many singles did he buy?

**Science (Physics)**

Two 1.5 kg balls move away from each other, one traveling 9 m/s to the right, the other 2 m/s to the left. What is the magnitude of the total momen- tum of the system? Answer in units of kg · m/s

**physics**

A space vehicle is coasting at a constant velocity of 20.7 m/s in the +y direction relative to a space station. The pilot of the vehicle fires a RCS (reaction control system) thruster, which causes it to accelerate at 0.260 m/s2 in the +x direction. After 42.0 s, the pilot shu...

**physics**

Only two forces act on an object (mass = 4.20 kg), as in the drawing. (F = 73.0 N.) Find the magnitude and direction (relative to the x axis) of the acceleration of the object. magnitude m/s2 direction ° counterclockwise from the +x axis The angle from the block is pointin...

**Physics**

A skateboarder shoots off a ramp with a velocity of 6.5 m/s, directed at an angle of 62° above the horizontal. The end of the ramp is 1.5 m above the ground. Let the x axis be parallel to the ground, the +y direction be vertically upward, and take as the origin the point o...

**Physics**

A skateboarder shoots off a ramp with a velocity of 6.5 m/s, directed at an angle of 62° above the horizontal. The end of the ramp is 1.5 m above the ground. Let the x axis be parallel to the ground, the +y direction be vertically upward, and take as the origin the point o...

**Physics**

You are on a treasure hunt and your map says "Walk due west for 52 paces, then walk 29.6° north of west for 40 paces, and finally walk due north for 25 paces." What is the magnitude of the component of your displacement in the following directions? (a) due north ...

**Math**

The sunshine tool company charges $25 for hammers and $14 for screwdrivers. the company ships a total of 55 tools along with the bill of $968.How many of each tool was shipped?

**Math**

Against the wind, a small palne flew 900 miles in 9 hours. The return trip took only 5 hours. What was the speed of the wind ?

**MAth**

Ida plans to construct a square showing exact measurements of the sides. Which combination of tools would best help Ida construct the square? Answer A: pencil, compass, and straightedge B: pencil, string, and compass C: pencil, ruler, and straightedge D: pencil, straightedge, ...

**physics**

a rock is dropped from a height of 15m above the ground. when it hits the ground, it leaves a hole 12cm deep. what is the speed of the rock when it hits the ground? what is the deceleration of the rock when it hits the ground?

**physics**

a rock is dropped from a height of 15m above the ground. when it hits the ground, it leaves a hole 12cm deep. what is the speed of the rock when it hits the ground? what is the deceleration of the rock when it hits the ground?

**physics**

An arrow is shot verticaaly upward. Two seconds later, it is at a height of 42 meters ( although this is not necessarily the highest point). with what speed was the arrow shot? how long is the arrow in flight altogether?

**Pre-Agbra**

if i may ask

**Pre-Agbra**

how did you do that olivia ?

**Pre-Agbra**

what is 0.9 divided by 1000

**Physics**

13.645

**chemistry**

a sample of gas occupies 1910ml at -22.8 degrees C and 740 torr. what volume would it occupy at the same pressure and 285 degrees C? answer units in ml

**COM**

Thank you Ms. Sue

**COM**

Read essay below and explain how effectively did the author persuade you and why? _______________________________________ The United States is the only modernized Western nation that does not offer publically funded health care to all its citizens; the costs of health care for...

** Informatics**

1.Identify the accommodations that providers must make to assure effective learning in an e-health environment; b.Outline how learning might be facilitated or hampered in an e-health environment

**physics**

A hill that has a 17.5% grade is one that rises 17.5 m vertically for every 100.0 m of distance in the horizontal direction. At what angle is such a hill inclined above the horizontal?

**UCP**

Outline how learning might be facilitated or hampered in an e-health environment.

**UCP**

Identify the accommodations that providers must make to assure effective learning in an e-health environment.

**Gemotry**

if A(2,4) and B(3,1) and C(15,7) find the slope of the altitude from A to BC

**government**

1. The _____ Act mandated that at least some federal employees be chosen on the basis of merit instead of political connections. Federal Employment Pendleton Bureaucratic Fairness Civil Service 2. The cooperation between interest groups, federal agencies, and related congressi...

**reading **

in the watson's go to birmingham 1963 how did Mr. watson make everyone sleep on the trip?

**science**

vehicle that took the first astronauts to the moon

**math **

the saturn V rocket is 364 feet long. How many 4 foot tall people would hav to stand on top of each other to be as tall as the rocket?

**science**

an area of space with gravity so strong that it traps light (two words) it has 9 letter in it

**science**

a body that revolves around another body in space. it has 9 letters

**science**

the space telescope was named for this American astronmer it has 6 letters

**science**

the russian name given to a person who travels into space it is a 9 letter word

**science**

what is the theory that the universe began in a giant explosion (two words) it has 7 letters

**science**

a theory that the universe began in a giant explosion (two words) it has 7 letters

**math**

if your ranked 59 out of 255 what is the percentage

**calculus**

Find the average rate of change of the function over the given interval. You must reduce and simplify your answer, if possible. a. f(x)=cot x, [pi/6, pi/2] b. f(theta)= -2 + cos (theta), [-pi, 0]

**Community Nursing**

Thanks

**Community Nursing**

I am just as confused. This is a community nursing class and out of this article I must write a paper and tell if it is adequately explained, the type of STYLE and if the article is comprehensive, accurate, and/or persuasive, and if it is a Public or community health issue. Al...

**Community Nursing**

I need helpl in determining how to complete this paper Neighborhood hospital ED sees critical capacities by By: G. Johnson

**physics: Heat**

You have 325 g of water at 18C. What is the most ice (at 0C) that you could put into this water and have it all melt?

**UNCP**

Please Explain why small effect size occurs in nursing studies?

**Chemistry**

What is the theoretical yield of PbI2 with 25.0 g of Pb(NO3)2?

**Physics**

For part B you have to divide the 9.94 by 2 then multiply by time

**geometry**

If X = 10 cm and Y = 24 cm, what is the length of Z?

**Math**

A Man and 6 boxes weigh 300 lbs. If the man weighs 228 lbs., how much does each box weigh?

**Math**

At lunch, 17 students drank lemonade. This represented 20% of the student on the field trip. How many students were on the field trip?

**Math**

Akira is selling raffle tickets to raise money for the school band. The odds aginst winning a prize in the raffle are 9:1. What is the decimal probability of winning a prize?

**english**

i need a persuasive essay on why the cotton production was dependent upon slave trade in the 1800s

**Calculus **

An isosceles triangle is to have a perimeter of 64cm. Determine the side lengths of the triangle if the area is to be maximum. I need help setting this question up! Please

**physics**

A steel ball of mass 0.300 kg is fastened to a cord that is 70.0 cm long and fixed at the far end. The ball is then released when the cord is horizontal. At the bottom of its path, the ball strikes a 2.50 kg steel block initially at rest on a frictionless surface. The collisio...

**Science**

Inclination angle of 38.0 degrees with respect to the horizontal. Suppose a truck on a street, for the truck to remain at rest, a static friction must exist. If an additional force with a magnitude equal to one-fourth the weight of the truck is applied uphill in order to hold ...

**geometry**

A circle of diameter 2 inches has its center at the center of a square with 2-inch sides. Find the area of the region that is inside the square and outside the circle.

**6th grade math**

5x4 20 it would be 20 M^2

**Pre Calc--- Repost**

I already asked this, but I didn't really understand the answer I got. I got the general idea, but I don't have a good enough understanding to answer the question. Writing to Learn: In a certain video game a cursor bounces back and forth horizontally across the screen ...

**PreCalculus**

I still don't quite understand this.

**PreCalculus**

Writing to Learn: In a certain video game a cursor bounces back and forth horizontally across the screen at a constant rate. Its distance d from the center of the screen varies with time t and hence can be described as a function of t. Explain why this horizontal distance d fr...

**math**

3/8 :)

**Math Factorization**

2xsquare - 11x + 5 = 0

**physics**

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

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