# Posts by bala

Total # Posts: 75

**maths**

If 2/3 part of a number is greater by 4 than 3/5 of it. then the number is

**maths**

2 trains are 2 km apart and their lengths are 200m and 300m.They are approaching towards each other with a speed of 20m/s and 30m/s.After how much time they cross each other ?

**maths**

The ratio of Mon's pencils to Josh's pencil id 5:7. Josh has 18 pencils more than Mon. If Josh gives 9 pencils to Mon, what will be the new ratio of Mon's pencils to Josh's pencils?

**maths**

tickets for a school play cost $4 for adults and $2 for students at the end of the play the school sold a total of 105 tickets and collected $360 how much of each type of tickets did they sell .

**maths**

There were some boys and girls in the school hall at first. 40% of the boys and 10% of the girls left the school hall. As a result, 3/4 of the pupils remained in the school hall.There were 12 more girls than boys who remained in the school hall. how many boys were there at ...

**chemistry**

how many grams of sodium hydroxide is required to neutralize 73grams of hydrochloric acid and to form sodium chloride and water

**science**

How many grams of sodium hydroxide is required to neutralize 73 grams of hydrochloric acid and to from sodium chloride and water

**social study**

what are the ways of solving enviromental problems in your communities?

**Math**

1. One monthly phone plan costs $20 for 250 minutes of talk plus 10 cents for every text message. Another monthly plan offers 250 minutes for $30 plus 5 cents for every text message. Caroline expects to talk less than 250 minutes a month but will use the texting often. How ...

**Chemistry**

P1 p2 v1 v2

**Chemistry**

600cm3 of a gas has a pressure of 1200mmHg find its volume if the pressure is reduced to 1001mmHg

**northview**

A player bounces a 0.46 kg soccer ball off her head, changing the velocity of the ball from i = (8.7 m/s) + (-3.7 m/s) to f = (5.1 m/s) + (4.2 m/s). The ball is in contact with the player's head for 6.7 ms.

**Physics**

A snapshot graph of a travelling wave is shown. The wave is travelling to the right at 50.0 m/s. What is the amplitude if the maximum displacement is 38.0 cm and the total distance travelled by the wave is 16.0 m?

**Physics**

A snapshot graph of a travelling wave is shown. The wave is travelling to the right at 50.0 m/s. What is the amplitude if the maximum displacement is 38.0 cm and the total distance travelled by the wave is 16.0 m?

**Physics**

A wave is travelling to the right at 50.0 m/s. What is the amplitude if the maximum displacement is 38.0 cm and the total distance travelled by the wave is 16.0 m?

**Physics**

1) A microphone has an area of 6.7 cm2. It receives during a 4.62 s time period a sound energy of 2.5x10-11 J. What is the intensity of the sound? 2) Using the intensity in the previous question, what is the variation of pressure in the sound wave if the speed of sound is 343...

**Physics**

1) A microphone has an area of 6.7 cm2. It receives during a 4.62 s time period a sound energy of 2.5x10-11 J. What is the intensity of the sound? 2) Using the intensity in the previous question, what is the variation of pressure in the sound wave if the speed of sound is 343 ...

**Physics**

Thank youuu sooo much i didn't see it that's why i kept posting it :(

**Physics**

1) A microphone has an area of 6.7 cm2. It receives during a 4.62 s time period a sound energy of 2.5x10-11 J. What is the intensity of the sound? 2) Using the intensity in the previous question, what is the variation of pressure in the sound wave if the speed of sound is 343 ...

**Physics**

Two strong magnets on opposite sides of a small table are shown. The long-range attractive force between the magnets keeps the lower magnet in place. Suppose the weight of the table is 23.4 N, the weight of each magnet is 2.67 N, and the magnetic force on the lower magnet is 5...

**Physics**

A block of mass M resting on a 21.5° slope is shown. The block has coefficients of friction μs=0.605 and μk=0.344 with the surface. It is connected via a massless string over a massless, frictionless pulley to a hanging block of mass 2.57 kg. What is the minimum ...

**Physics**

A block of mass M resting on a 21.5° slope is shown. The block has coefficients of friction μs=0.605 and μk=0.344 with the surface. It is connected via a massless string over a massless, frictionless pulley to a hanging block of mass 2.57 kg. What is the minimum ...

**Physics**

Two strong magnets on opposite sides of a small table are shown. The long-range attractive force between the magnets keeps the lower magnet in place. Suppose the weight of the table is 23.4 N, the weight of each magnet is 2.67 N, and the magnetic force on the lower magnet is 5...

**Physics**

A block slides down a frictionless plane having an inclination of 13.0°. If the block starts from rest at the top and the length of this incline is 1.62 m, find the acceleration of the block.

**Physics**

It's asking for the direction of acceleration. I calculated the acceleration already.

**Physics**

Forces of 11.5 N north, 20.4 N east, and 15.7 N south are simultaneously applied to a 3.74 kg mass as it rests on an air table. What is the direction of the acceleration in degrees? (Take east to be 0 degrees and counterclockwise to be positive.)

**Physics**

Forces of 11.5 N north, 20.4 N east, and 15.7 N south are simultaneously applied to a 3.74 kg mass as it rests on an air table. What is the magnitude of its acceleration?

**Physics**

Forces of 11.5 N north, 20.4 N east, and 15.7 N south are simultaneously applied to a 3.74 kg mass as it rests on an air table. What is the magnitude of its acceleration?

**Physics**

A heavy freight train has a mass of 14000 metric tons. If the locomotive can pull with a force of 645000 N, how long does it take to increase it's speed from 0 to 69.8 km/h?

**Physics**

A heavy freight train has a mass of 14000 metric tons. If the locomotive can pull with a force of 645000 N, how long does it take to increase it's speed from 0 to 69.8 km/h?

**physics**

A heavy freight train has a mass of 14000 metric tons. If the locomotive can pull with a force of 645000 N, how long does it take to increase it's speed from 0 to 69.8 km/h?

**Physics**

A heavy freight train has a mass of 14000 metric tons. If the locomotive can pull with a force of 645000 N, how long does it take to increase it's speed from 0 to 69.8 km/h?

**Biology**

Variation in biology is a) inevitable b) exciting c) the raw material for natural selection d) best described by statistics e) all of the above

**Physics**

A speedboat starts from rest and accelerates at +1.94 m/s2 for 7.00 s. At the end of this time, the boat continues for an additional 6.00 s with an acceleration of +0.515 m/s2. Following this, the boat accelerates at -1.58 m/s2 for 8.00 s. What is the velocity of the boat at t...

**Physics**

A sprinter explodes out of the starting block with an acceleration of +2.79 m/s2 , which she sustains for 1.65 s. Then her acceleration drops to zero for the rest of the race. What is her velocity at t = 1.65 s and at the end of the race?

**Physics**

A sprinter explodes out of the starting block with an acceleration of +2.79 m/s2 , which she sustains for 1.65 s. Then her acceleration drops to zero for the rest of the race. What is her velocity at t = 1.65 s and at the end of the race?

**Physics**

A sprinter explodes out of the starting block with an acceleration of +2.79 m/s2 , which she sustains for 1.65 s. Then her acceleration drops to zero for the rest of the race. What is her velocity at t = 1.65 s and at the end of the race? Answer 1 of 2

**Physics**

You are driving to the grocery store at 18.2 m/s. You are 120.0 m from an intersection when the traffic light turns red. Assume that your reaction time is 0.270 s and that your car brakes with constant acceleration.How far are you from the intersection when you begin to apply ...

**Physics**

You are driving to the grocery store at 18.2 m/s. You are 120.0 m from an intersection when the traffic light turns red. Assume that your reaction time is 0.270 s and that your car brakes with constant acceleration.How far are you from the intersection when you begin to apply ...

**ph**

You are driving to the grocery store at 18.2 m/s. You are 120.0 m from an intersection when the traffic light turns red. Assume that your reaction time is 0.270 s and that your car brakes with constant acceleration.How far are you from the intersection when you begin to apply ...

**Physics**

no i didnt. did you get 13 and 14

**Physics**

lol sorry ma internet went all hay wire on me!!! i got 255 m for the entire run for questin 7

**Physics**

thnx......i found out my mistake. i didn't convert the distance to meters :)

**Physics**

An 18-year-old runner can complete a 10.0-km course with an average speed of 4.48 m/s. A 50-year-old runner can cover the same distance with an average speed of 4.18 m/s. How much later should the younger runner start in order to finish the course at the same time as the older...

**Physics**

You are driving to the grocery store at 18.2 m/s. You are 120.0 m from an intersection when the traffic light turns red. Assume that your reaction time is 0.270 s and that your car brakes with constant acceleration.How far are you from the intersection when you begin to apply ...

**Physics**

You are driving to the grocery store at 18.2 m/s. You are 120.0 m from an intersection when the traffic light turns red. Assume that your reaction time is 0.270 s and that your car brakes with constant acceleration.How far are you from the intersection when you begin to apply ...

**Physics**

thank you :)

**Physics**

You are driving to the grocery store at 18.2 m/s. You are 120.0 m from an intersection when the traffic light turns red. Assume that your reaction time is 0.270 s and that your car brakes with constant acceleration. How far are you from the intersection when you begin to apply...

**Physics**

i got 255m but am sure we have different numbers in the question.

**Physics**

nope it was positive :)

**Physics**

u= initial velocity. omg question 7 was sooo stupid!! all you do is get the distance from the house to the tree and divide by the (final time - initial time. ( we only consider the distance form the house to the tree because according to displacement when you run from lets say...

**Physics**

you welcome. for the second part use this equation s=1/2(u+v)t s= to the distance you got in the previous answer

**Physics**

do u have an extension number??? u can cal me 51185. he has outline the equations above mgh=1/2m(final velocity-initial velocity) >therefore the m will cross out on both sides >then we knw that accelaration= -9.8m/s2 >do the calculations on the left side ov the ...

**Physics**

are u at mac????....doing cappa questions???? .....i got the answer...its 1.55*10^2 m

**Physics**

why do we subtract the two velocities?

**Physics**

A skier is gliding along at 7.49 m/s on horizontal, frictionless snow. He suddenly starts down a 14.4° incline. His speed at the bottom is 28.5 m/s. What is the length of the incline?

**Physics**

A skier is gliding along at 7.49 m/s on horizontal, frictionless snow. He suddenly starts down a 14.4° incline. His speed at the bottom is 28.5 m/s. What is the length of the incline?

**Physics**

A skier is gliding along at 7.49 m/s on horizontal, frictionless snow. He suddenly starts down a 14.4° incline. His speed at the bottom is 28.5 m/s. What is the length of the incline?

**Physics**

A skier is gliding along at 7.49 m/s on horizontal, frictionless snow. He suddenly starts down a 14.4° incline. His speed at the bottom is 28.5 m/s. What is the length of the incline?

**Physics**

A skier is gliding along at 7.49 m/s on horizontal, frictionless snow. He suddenly starts down a 14.4° incline. His speed at the bottom is 28.5 m/s. What is the length of the incline?

**Physics**

A rock is tossed straight up with a velocity of 32.1 m/s. When it returns, it falls into a hole 20.1 m deep. What is the rock's velocity as it hits the bottom of the hole?

**Physics**

A bicyclist makes a trip that consists of three parts, each in the same direction (due north) along a straight road. During the first part, she rides for 22 minutes at an average speed of 6.60 m/s. During the second part, she rides for 36 minutes at an average speed of 5.40 m/...

**Physics**

A bicyclist makes a trip that consists of three parts, each in the same direction (due north) along a straight road. During the first part, she rides for 22 minutes at an average speed of 6.60 m/s. During the second part, she rides for 36 minutes at an average speed of 5.40 m/...

**Physics**

Larry leaves home at 3:02 and runs at a constant speed to the lamppost. He reaches the lamppost at 3:18, immediately turns, and runs to the tree. Larry arrives at the tree at 3:26. What is Larry's average velocity during his trip from the lamppost to the tree?

**Physics**

A bicyclist makes a trip that consists of three parts, each in the same direction (due north) along a straight road. During the first part, she rides for 22 minutes at an average speed of 6.60 m/s. During the second part, she rides for 36 minutes at an average speed of 5.40 m/...

**Physics**

Larry leaves home at 3:02 and runs at a constant speed to the lamppost. He reaches the lamppost at 3:18, immediately turns, and runs to the tree. Larry arrives at the tree at 3:26. What is Larry's average velocity during his trip from the lamppost to the tree?

**Physics**

In 1865, Jules Verne suggested sending people to the Moon by launching a space capsule with a 228.8 m long cannon. The final speed of the capsule must reach 11.39 km/s. What acceleration would the passengers experience?

**Physics**

In 1865, Jules Verne suggested sending people to the Moon by launching a space capsule with a 228.8 m long cannon. The final speed of the capsule must reach 11.39 km/s. What acceleration would the passengers experience?

**Physics**

An object is thrown vertically upward with a speed of 31.8 m/s. How long does it take to reach this highest altitude?

**11th grade Algebra**

-3/5 because -3x - 4= 2x-4

**Physics**

1.181 *10^3

**physics**

An object is thrown vertically upward with a speed of 31.8 m/s. How high does it rise?

**9th grade**

106,141,181

**Chem 10**

how many grams of sodium hydroxide is required to neutralize 73grams of hydrochloric acid and to form sodium chloride and water

**nutrition**

What arguments are being raised by the Grocery Manufacturers of America?

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