Tuesday

November 24, 2015
Total # Posts: 1,746

**Physics**

A 1.00 kg block is attached to a spring with spring constant 14 N/m. While the block is sitting at rest, a student hits it with a hammer and almost instantaneously gives it a speed of 31 cm/s. What is the amplitude of the subsequent oscillations?What is the block's speed ...
*January 26, 2012*

**math**

The distance, d, an object falls after t seconds is given by the equation d=-1/2(9.8)t^2 If t^2=83sec^2 then what is a good estimate for t?
*January 23, 2012*

**physics**

An electron that has a horizontal initial speed of 4.50 106 m/s enters a region that has an electric field of 120 V/m pointing vertically upward. (a)How long does the electron take to travel 9 cm in the horizontal direction? s (b) In this same time, what is the vertical ...
*January 18, 2012*

**physics**

A particle has a charge of +1.5 µC and moves from point A to point B, a distance of 0.19 m. The particle experiences a constant electric force, and its motion is along the line of action of the force. The difference between the particle's electric potential energy at...
*January 17, 2012*

**physics**

A particle has a charge of +1.5 µC and moves from point A to point B, a distance of 0.19 m. The particle experiences a constant electric force, and its motion is along the line of action of the force. The difference between the particle's electric potential energy at...
*January 17, 2012*

**math**

Please help me i really need help before school help me
*January 8, 2012*

**math**

bernie began building a model airlane on day 7 of his summer vacation and finished building it on day 65. he worked on the plane each day. how many days did it take?
*January 8, 2012*

**math**

sorry my answer is 26 is that right steve
*January 8, 2012*

**math**

so what is the answer reiny
*January 8, 2012*

**math**

at the inauguration, the President was honored with a 21-gun salute. the report form each gunshot lasted 1 s. four seconds elasped between shots. how long did the salute last?
*January 8, 2012*

**Hindi**

i dont know check the internet
*January 8, 2012*

**Geometry**

My name does not matter, i just need an answer and it would be nice if i got one instead of focusing on what name i use. Thank you . . .
*January 7, 2012*

**Geometry**

Given two statements: r -> s and ~s -> ~r, in which way is the second statement related to the first? a.) converse b.) inverse c.) contrapositive d.) biconditional
*January 7, 2012*

**physics**

when babe ruth hit a homer over the 7.5-m-high right field fence 95 m from home plate, roughly what wa the minimum speed of the ball when it left the bat? Assume the ball wa hit 1.0 m above the ground and it path initially made a 38 degree angle with the ground.
*January 5, 2012*

**physics**

apollo astronaunts took a nine iron to the moon and hit a golf ball about 180 m ! Assuming that the swing, launch angle, and so on, were the same as on earth where the same astronaut could hit it only 35 m, estimate the acceleration due to gravity on the surface of the moon. (...
*January 5, 2012*

**physics**

an olympic long jumper i capable of jumping 8.0 m. Assuming hi horizonal speed is 9.1 m/s as he leaves the ground, how long is he in the air and how high doe he go? Assume that he lands standing upright that is, the same way he left the ground.
*January 5, 2012*

**Geometry**

If each exterior angle of a regular polygon measures 40 degrees, what is the total number of sides in the polygon? a.) 9 b.) 8 c.) 6 d.) 5
*December 27, 2011*

**Geometry**

In logic, which of the following is said to be logically equivalent to the original statement? a.) converse b.) inverse c.) negation d.)contrapositive
*December 22, 2011*

**Science 7R**

Did you figure it out? I don't know what it is?
*December 14, 2011*

**physics**

two canoeists start paddling at the same time and head toward a small island in a lake. caneist 1 paddles with a speed of 1.35 m/s at an angle of 45 degrees north of east. canoeist 2 starts on the opposite shore of the lake,a distance of 1.5 km due east of canoeist 1. what ...
*December 13, 2011*

**physics**

a mountain climber jumps a 3.0 m wide crevasse by leaping horizontally with a speed of 8.0 m/s. (a) if the climber's direction of motion on landing is -45 degrees, what is the height the difference between the two sides of the crevasse? (b) where does the climber land?
*December 13, 2011*

**physics**

playing shortshop, you pick up a ground ball and throw it to second base. the ball is thrown horizontally with a speed of 22 m/s ditectly toward point a. when the ball reaches the second baseman 0.45 s later, it is caught at ponit b. (a) how far were you from the second ...
*December 13, 2011*

**physics**

an astronaut on the planet zircon tosses a rock horizonally with a speed of 6.95 m/s. the rock falls through a vertical distance of 1.40 m and lands a horizontal distance of 8.75 m from the astronuat. what is the acceleration of gravity on zircon?
*December 13, 2011*

**physics**

the great gray-green, greasy zambezi river flowa over victoria falls in south central africa. the falls are approximately 108 m high. if the river is flowing horizontally at 3.60 m/s just before going over the falls, what is the speed of the water when it hits the bottom? ...
*December 13, 2011*

**physics**

the great gray-green, greasy zambezi river flowa over victoria falls in south central africa. the falls are approximately 108 m high. if the river is flowing horizontally at 3.60 m/s just before going over the falls, what is the speed of the water when it hits the bottom? ...
*December 13, 2011*

**latin**

1.) One who acknowledges the gradual increases in bidding at a public sale is called a/an _____. 2.) The primary connotation of discipline to most people is ________. According to the derivation of the word, however, a better definition of discipline would be _______. 3.) ...
*December 10, 2011*

**Geometry**

Two triangles are similar. The lengths of the sides of the smaller triangle are 5,6,and 9. The perimeter of the larger triangle is 50. What are the lengths of the sides of the larger triangle?
*December 10, 2011*

**geometry**

the magnitude of a translation is 7x+3 inches . The distance between the parallel lines of reflection is 3x - 1. solve for x
*December 1, 2011*

** physics**

a force of 50 n to the left causes a 1.35 kg book to have a net acceleration of 0.76 m/s^2 to the left. what is the frictonal force on the book?
*November 29, 2011*

**Geometry**

The bases of a trapezoid are 10 and 12 and the nonparallel sides are 2 and 3. How far must each of the nonparallel sides be extended to form a triangle?
*November 26, 2011*

**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.
*November 22, 2011*

**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 ...
*November 22, 2011*

**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 ...
*November 22, 2011*

**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?
*November 22, 2011*

**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.
*November 22, 2011*

**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 ...
*November 20, 2011*

**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 ...
*November 20, 2011*

**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 ...
*November 20, 2011*

**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 ...
*November 18, 2011*

**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 ...
*November 18, 2011*

**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 ...
*November 18, 2011*

**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 ...
*November 18, 2011*

**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 ...
*November 18, 2011*

**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 ...
*November 18, 2011*

**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 ...
*November 18, 2011*

**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 ...
*November 18, 2011*

**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) ...
*November 17, 2011*

**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, ...
*November 17, 2011*

**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?
*November 17, 2011*

**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?
*November 17, 2011*

**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.
*November 17, 2011*

**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?
*November 17, 2011*

**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.
*November 17, 2011*

**Chemistry**

how many grams of solid iodine are produced by the decompostion of 2.1 g of hydrogen iodide gas?
*November 12, 2011*

**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 ...
*November 12, 2011*

**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 ...
*November 9, 2011*

**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?
*November 9, 2011*

**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 ...
*November 9, 2011*

**social studies**

anyone?
*November 8, 2011*

**social studies**

what are three things that theodore roosevelt feared? what are three thing that theodore roosevelt would like to do?
*November 8, 2011*

**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...
*November 6, 2011*

**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 ...
*November 6, 2011*

**English**

What are some alliteration for tigers?
*October 31, 2011*

**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 ...
*October 27, 2011*

**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 ...
*October 27, 2011*

**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&#...
*October 27, 2011*

**Algebra 2**

Factoring 6p^4-13p^3q^2-28p^3 I have come up with (3p^2 + 4q)(2p^2 -7q^2q
*October 25, 2011*

**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...
*October 24, 2011*

**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
*October 24, 2011*

**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...
*October 23, 2011*

**3RD GRADE MATH**

David also bought 94 stickers. He bought 2 strips of 10 and many singles. How many singles did he buy?
*October 19, 2011*

**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
*October 17, 2011*

**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 ...
*October 13, 2011*

**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 ...
*October 13, 2011*

**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 ...
*October 5, 2011*

**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 ...
*October 5, 2011*

**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 ...
*October 5, 2011*

**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?
*September 26, 2011*

**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 ?
*September 26, 2011*

**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, ...
*September 25, 2011*

**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?
*September 21, 2011*

**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?
*September 21, 2011*

**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?
*September 21, 2011*

**Pre-Agbra**

if i may ask
*September 13, 2011*

**Pre-Agbra**

how did you do that olivia ?
*September 13, 2011*

**Pre-Agbra**

what is 0.9 divided by 1000
*September 13, 2011*

**Physics**

13.645
*September 7, 2011*

**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
*August 31, 2011*

**COM**

Thank you Ms. Sue
*August 19, 2011*

**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...
*August 19, 2011*

** 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
*August 16, 2011*

**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?
*August 15, 2011*

**UCP**

Outline how learning might be facilitated or hampered in an e-health environment.
*August 15, 2011*

**UCP**

Identify the accommodations that providers must make to assure effective learning in an e-health environment.
*August 15, 2011*

**Gemotry**

if A(2,4) and B(3,1) and C(15,7) find the slope of the altitude from A to BC
*July 24, 2011*

**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 ...
*June 28, 2011*

**reading **

in the watson's go to birmingham 1963 how did Mr. watson make everyone sleep on the trip?
*June 23, 2011*

**science**

vehicle that took the first astronauts to the moon
*June 22, 2011*

**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?
*June 22, 2011*

**science**

an area of space with gravity so strong that it traps light (two words) it has 9 letter in it
*June 22, 2011*