# Posts by sahar

Total # Posts: 36

science
when two equal forces of f1 and f2 making an angle of 180 degree with each other the magnitude of their resultant is ................?

math
order these from least to greatest,5/9,2/7,1/8

Geometry
Find the precision for each measurement. 120 meters, 7 1/4 inches, 30.0 millimeters

Physics
Two masses, mass A (1.9 kg) and B (3.3 kg) are hung on either side of a pulley. The masses each have an initial speed of 0.8 m/s, with mass B moving up. How high, in m, does mass B move after being released at this initial speed?

Physics
A certain insect’s wing has been shown to deflect a distance 14.8 mm under a force of 0.19 N applied to the end of the wing. (a) If the wing is assumed to behave as an ideal spring, calculate the force constant in N/m. (b) At this deflection, how much energy is stored in ...

Physics
A jet of mass 4,768 kg lands on an airstrip, stopping after a distance of 414 m. If the jet has an initial landing speed of 36 m/s, what is the work done, in Joules, by non-conservative forces to stop the jet?

Physics
A crane lifts a package of mass 121 kg. If the power output of the crane is 101 Watts, at what speed can the package be lifted, in m/s?

stats
1. Use the table below to help you construct a probability distribution for all of the possible values of X and their probabilities 2. Find the expected value of X, and interpret it in the context of the game. 3. If you play in such a raffle 100 times, what is the expected net...

English
1. How does the fact that Anne tries to maintain a positive attitude affect the way readers view her? Please include textual evidence in your answer as well as what page number you found it on.

PHYSICS NEED HELP ASAP
A race car moving at 157km/hr decelerates at -7.00 m/s^2 to a speed of 75.0km/hr A) how long did this take? B) how many meters did the car travel during this deceleration? I attempted this problem many times and i don't seem to get the correct answer please show all work ...

physics
A race car moving at 157km/hr decelerates at -7.00 m/s^2 to a speed of 75.0km/hr A) how long did this take? B) how many meters did the car travel during this deceleration? I attempted this problem many times and i don't seem to get the correct answer please show all work ...

Physics
At the beginning of a basketball game, a referee tosses the ball straight up with a speed of 4.6 m/s. A player cannot touch the ball until after it reaches its maximum height and beings to fall down. What is the minimum time that a player must wait before touching the ball?

Physics
At the beginning of a basketball game, a referee tosses the ball straight up with a speed of 4.6 m/s. A player cannot touch the ball until after it reaches its maximum height and beings to fall down. What is the minimum time that a player must wait before touching the ball?

Physics
At the beginning of a basketball game, a referee tosses the ball straight up with a speed of 4.6 m/s. A player cannot touch the ball until after it reaches its maximum height and beings to fall down. What is the minimum time that a player must wait before touching the ball?

Physics
At the beginning of a basketball game, a referee tosses the ball straight up with a speed of 4.6 m/s. A player cannot touch the ball until after it reaches its maximum height and beings to fall down. What is the minimum time that a player must wait before touching the ball?

math
2x^2-5x-12=0 solve by completing the square. please explain how it's sovled.

math
2x^2-5x-12=0 solve by completing the square. please explain how it's sovled.

education
sand, rocking chairs, animals, and strap swings are examoles of a__ environment. a) static b) soft c) creative d) hard. would the answer be d) hard

kctcs
the ball thrown the brick wall bounces directly back with the same speed it had when it struck the wall . has the velocity of the ball change explain ?

math
Jenna has \$1500 in a savings account. She adds \$30 to her account each month. Luis has \$2400 in his savings account. He withdraws \$30 from his account each month. Write and solve a system of equation.

math
you have an unlimited supply of 5% saline solution and 8% saline solution. How much of each type would you have to use to create 60 ounces of 7% saline solution? Write and solve a system of equations to model and solve this problem.

math
teemu's t-shirts designs and manufactures t-shirts for a \$15 flat design rate and \$7.50 for each t-shirt.he wants to sell his t-shirts to the senior class for their graduation party. he is going to charge them \$10 for each t-shirt. a) write a function,c, representing the ...

math
teemu's t-shirts designs and manufactures t-shirts for a \$15 flat design rate and \$7.50 for each t-shirt.he wants to sell his t-shirts to the senior class for their graduation party. he is going to charge them \$10 for each t-shirt. write a function,c, representing the cost...

maths
Its rectangular room of 6.25m by 4.85m

maths
Hexagonal tiles of sides20cm are used to tile a room which measures 6.25m. Assuming we complete the edges by cutting up tiles, how many tiles are needed?

physics
which statement is true about weight 1) pull of earth on a body 2) mass of a body 3) scalar quantity 4) unit per kilogram

physics
which statement is true about weight 1) pull of earth on a body 2) mass of a body 3) scalar quantity 4) unit per kilogram

chemistry
draw a diagram showing the arrangement of the valency electrons in one molecule of the covalent compound selenium chloride. use x to represent an electron from an atom of selenium. use o to represent an electron from an atom of chlorine

chemistry
Name a reagent that will react with a) copper(II)hydrooxide and aluminium hydroxide b)aluminium hydroxide but not copper(II)hydroxide 2)suggest how you could separate a mixture of silicon(IV) oxide and magnesium oxide 3)Name a reagent that could react with both zinc and copper...

geometry
find the area of the garden drawn below.

math
5x-6y+30=o

Calculus
Consider the function below. f(x) = [1-(4/x)]^x (a) Use a graph to estimate the value of the limit of f(x) as x approaches infinity. (Round the answer to two decimal places.) (b) Use a table of values of f(x) to estimate the limit. (Round the answer to four decimal places.)

chemistry.
all of above is wrong. i have the same question for school.

Chemistry - General, Hess's Law
In an experiment, 11.6g of a salt was dissolved in 100.0ml of water contained in the above calorimeter, all at an initial tmperature of 24.5 degrees Celsius. After dissolution was complete, the temperatur was 31.8C. The specific heat of the solution is 3.63J/gxC and the ...

Chemistry - General
1. Consider a calorimeter into which 135g of water at 45.3 degrees Celsius is added. The initial temperature of the calorimeter was 23.8C and the equilibrium temperature of the water and the calorimeter is 39.6C. Assuming there is no heat loss to the surroundings, what is the ...

Math
812 divide by 9 is 90 because you estimate

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