# Posts by mariam

Total # Posts: 197

Physics
A shopper in a supermarket pushes a loaded cart with a horizontal force of 80.5N. If the cart has a mass of 33.8kg, how far will it move in 1.31s, starting from rest? The coefficient of friction is 0.12

Pre-Calculus
Umm, how do I find this? with work? Use a calculator to evaluate the function at the indicated value of x. Round your answer to four decimal places. f(x) = 3 ln x x = 0.32

A pumpkin is thrown upwards at a speed of 27.5 m/s and from a height of 2 m above the ground. How long before it hits the ground and smashes? Not sure where to begin with this.

A little bumblebee accelerates uniformly at 1.5 m/s2 from rest to 22 m/s. Immediately upon reaching 22m/s, the brakes are applied and it stops 2.5 s later. Find the total distance traveled.

Physics
A sailboat is moving across the water at 3.0 m/s. A gust of wind fills its sails and it accelerates at a constant 2.0 m/s2. At the same instant, a motorboat at rest starts its engines and accelerates at 4.0 m/s2. After 3.0 seconds have elapsed, find the velocity of the ...

Physics
A rail gun uses electromagnetic energy to accelerate objects quickly over a short distance. In an experiment, a 2.00 kg projectile remains on the rails of the gun for only 2.10x10^-2 s, but in that time it goes from rest to a velocity of 4.00×10^3 m/s. What is the ...

Physics
The United States and South Korean soccer teams are playing in the first round of the World Cup. An American kicks the ball, giving it an initial velocity of 3.6 m/s. The ball rolls a distance of 5.0 m and is then intercepted by a South Korean player. If the ball accelerates ...

Physics
The city is trying to figure out how long the traffic light should stay yellow at an intersection. The speed limit on the road is 45.0 km/h and the intersection is 23.0 m wide. A car is traveling at the speed limit in the positive direction and can brake with an acceleration ...

Rex flips a coin vertically upwards with an initial velocity of 0.262m/s. Determine the height to which the coin will rise above the initial height. At what velocity is the coin moving when Rex catches it.

A tennis ball is tossed up off a building with a velocity of 22m/s. It takes 6.4s to reach the ground. How high is the building and what is the maximum height of the tennis ball?

MATH!!!!
Yes

Pre-calc
how can I divide (3+4i)/(2-5i)?? If there's work, that would help me too

Physics
Jeff tosses a can of soda pop to Karen, who is standing on her 3rd floor balcony a distance of 8.5m above Jeff’s hand. Jeff gives the can an initial velocity of 16m/s, fast enough so that the can goes up past Karen, who catches the can on its way down. Calculate the ...

Physics
The ceiling of a school gymnasium is a distance of 20m. You toss a ball 1.5m from the ground. What is the maximum initial velocity you can toss the ball and have it just miss the ceiling?

Physics
George drops a stone from atop a cliff of 25m. How long does it take to hit the ocean below, what velocity is it travelling when it gets there?

Physics
Roger tosses a ball straight upward at a velocity of +32m/s, calculate the maximum height of the ball and the time to get to the maximum height.

Science Portfolio
1.) Always wash your hands and make sure that you have all ingredients and tools that you'll need on-hand in the lab.

Pre-Calculus
When buying gasoline, you notice that 14 gallons of gasoline is approximately the same as 53 liters. Use this information to find a linear model that relates gallons to liters. Then use the model to find the number of liters in 25 gallons. Round your answer to the nearest tenth.

Pre-Calculus
If w varies directly as z and w = 9 when z = -6, find w when z = 3. a) 0 b) -4.5 c) -2 d) 4.5

Pre-Calculus
True or false: Suppose that y varies directly as x. If y is 5 when x is 30, the constant of variation is 150.

Pre-Calculus
True or false: P varies directly as Q can be written as P = kQ.

BASIC SCIENCE
DRAWING OF A CELL

Math
SOMETIMES

math
"Relative frequency" is the same as which of the following? frequency histogram cumulative frequency distribution proportion I think its proportion, am I right?

Statistics
study looked at the effects of light on female mice. Fifty mice were randomly assigned to a regimen of 12 hours of light and 12 hours of dark (LD), while another fifty mice were assigned to 24 hours of light (LL). Researchers observed the mice for two years. Two of the LD ...

Statistics
Is there a formula for this? Please I need help

Statistics
A statistics class is made up of 60% women and has 21 women in it. What is the total number of students in the class?

math
So for this question it says, the graph of the function f(x)= radical of x+4 is shown. The domain of the function is 1) {x|x is greater than 0} 2) {x|x is greater or equal to 0} 3) {x|x is greater than -4} 4) {x|x is greater than or equal to -4} I know that the answer is 4 but...

math
When a number is subtracted under the radical which way do you move the graph?

math
Why is there two different formulas, recursive and explicit. When do you use it?

math
I was just wondering, what is the difference between an arithmetic sequence and a geometric sequence?

Physics
A uniform metre rule is balanced at the 35cm mark when a mass of 500g is placed at the 20cm mark .determine the mass of the rule ..

math
It takes 8 hours for 5 people to paint a room. How long would it take 4 people?

History
What is fascism? Thank you!

Health!
Also, where are saddle joints located in my hand? Thanksss!

Health!
What motion does a saddle joint allow? What movement does a pivot joint allow? (please don't say pivotal) Thanks. :)

Physics
in this question we see that the only movement ( displacement/distance) that could be done was horizontal distance we started off with 4.80 m/s which was the initial velocity that the person was walking by, the person was walking by this velocity in a constant rate e then the ...

physics
vector A is 4.5 Km N, this means that for this vector we are not going to have an x- coordinate, we are only going to have a y- coordinate , since this vector is going N then the y- cordinate is postive number, and the y-coordinate for this vector will be + 4.5, while the x-...

Math
I am a seven digit number. I have the digit 3 in my ten thousands and tens places, and the digit 1 in all my other places. What number am I?

math
justin has a car that ca travel 77 1/2 miles with 3 1/10 gallons of gas. kim has a car that can travel 99 1/5 miles with 3 1/5 gallons of gas. How many miles can each person drive with one gallon of gas?

science
the picture shows a little palm tree with other big ones in a desert

Math
Which Polygon will Always Be Irregular? A.TRIANGLE B.TRAPEZOID C.SQUARE D.HEXAGON

Algebra
75% of the students on academic team earned 6 honors on the state examinations. the rest of the students on the team passed the state examinations. there were zero. if 30 students passed the ecam with honors, which proportion can be used to fun the total number of students who...

Algebra
a car rental company has two rates. The first rate is 45\$ per day plus 29.5 cents per mile the second rare is 90\$ per day plus 0.07 per mile. If you rented at the 90\$ rate, how many miles you would need to drive to break even?

chemistry
A 20.00 g sample of metal is warmed to 165˚C in an oil bath. The sample is then transferred to a coffee cup calorimeter that contains 125.0 g of water at 5.0˚C. The ﬁnal temperature of the water is 8.8˚C. mrtal water m=20g m=125g t1=165c t1=5 c=? t2=8.8 c...

math
When MacNeil says that much of television news is “machine gunning with scraps,” he means that

Social Studies
What year was Jamestown settled? What were the settlers looking for initially? What guaranteed their success?

chemistry
How many liters of hydrogen gas are produced during an enthalpy change of -50kJ, assuming STP conditions? 1L= 1kg zn+ hno3 yields znn03 + 1/2 h2 +100kJ -50 kj x (1mol h2/ 100kj) X (2.02g / 1 mol) h2 ) = 1.01 g please help tried to get the answer but it it supposed to be 11.02 ...

ela
What are the advantages of living in the society of fahrenheit 451

chemistry
A solution of KOH is prepared by dissolving 2.00 g of KOH in water to a final volume of 250 ml of solution what volume of this solution will neutralize 20.0 ml of 0.115 mol/L sulfuric acid? amount of KOH= 2.00g(1mol of KOH/ 56.01g)= 0.357 moles concentration of KOH in water = ...

Math
How do you graph mixed fraction from a table on a coordinate plane ?? Thanks

science
How does molecules move throughout the water cycle? evaporation: They move freely in the air condensation:They lose energy and are cooled runoff; they move down to the water precipatation: they fall down to the earths surface im really not sure so if i have something wrong can...

science
im sorry but i am having trouble what type of insulation they use please help me..

science
Thank you so much i now understand what i have to do :)

science
science questions:Look around your house and make a list o different kinds of containers that use insulation to keep foods hot or cold. If possible, describe the type of insulators used in each container. I don't know which containers in my house that uses insulation. Can ...

ela
What were obstacles that Mo'ne Davis had to overcome?

ela
Can you explain why its a legacy?

ela
Is Anne Frank legacy her diary?

Science
What are some home appliances that can cause phase changes?

science
What can we learn from an experiment itself?

Ela
thanks :)

Ela
What are some reading strategies or tips I can use for the Ela state exam?

ELA
Thanks

ELA
So if they give me a sentence saying " Lightning danced across the sky", since lightning does not dance, that would be human quality which would make it personification right???

ELA
So I am studying for the Ela state exam and i am writing down some notes... but i am still not sure what does personification mean and what are the examples after searching online. Someone please tell me what does it mean...

Ela
Thank you again

Ela
I'm sorry, one more question. Is it a?

Ela
Thank you

Ela
Im not sure what the answer is #2 i was actually having trouble with that..

Ela
Can you check if my answers are correct because i am having trouble with it? The Kingdoms End I stand at the edge of the sea, watching waves wash onto the sand. White foams spills over my feet into the moat of an abandoned castle. The king and his court have gone away, leaving...

math
A rectangle has a length of 6x+3 units and a width of 8 units. Write a simplified expression for the area, in square units, of this rectangle. So, my answer was 9x+8 please tell me is this correct... Thank you

math
what are the procedures on how to measure the length of an object with a ruler?

math, scale drawing
36 ft

Math
How do you graph a function like y=2x+0.5 and y=0.5x+1?

Math

Math
I meant y=0.5x+1

Math
How can you graph y=2X +0.5 and y=0.5+1? Thank you

algebra 2
X.2 +8x +15/x+5

math
You do cross out the zero. To not get confuse place the decimal in the right place.

earth science
The active sections that are located along fault lines are called

Physics
a car starts rest at 2m/s at a uniform speed of 5m/s(square) what is the time interval?

Physics
AN astronaut on the Moon has a mass (including his spacesuit and equipment) of 180 kg. the acceleration due to gravity on the Moon is 1.6 m/s2 (seconds squared). a) calculate his weight on the moon. the astronaut climbs 100m to the top of the crater . b) by how much does his ...

world problem
chloe collected 4 times as many bags of cans as her friend. if her friend collected 1/6 of a bag how much did chloe collect

Science
Ms. Sue

Science
.......

Science
How is potential and kinetic energy measured?

english
So i was reading an article and the question was ¨what heroic act did malala participate in? What does the question mean when it says 'heroic act ' thank you

math
i just need you to please give me tips and examples and maybe later i might tell you my answer to see if its correctp

math
hello im having problems with my math 1 Wells College in Aurora,New York was previously an all -girls college.In 2005,the college began to allow boys to enroll. By 2012, the ratio of boys to girls was 3 to 7. if there were 200 more girls then boys in 2012, how many boys were ...

science
Thank you so much

science
So the question is write down three examples of science in your everyday life. This was my answer: sound- compression wave, Baked goods- chemical reaction, Looking at mountains or ocean- earth science Please check my answer and see if this is good thank you

science

physics
i tried it but gives me an incorrect answer

physics
mass=50g=0.05kg v=500 s=10cm=0.01m K.E= 1/2mv^2 1/2x0.05x500x500 =6,250m/s^2

Science
A ray of light approaches a jar of honey at an angle of 30.0 degrees. If the angle of refraction is 19.5 degrees, what is the refractive index of honey?

Science
What is the index of refraction of a material if the angle of incidence in air is 50 degrees and the angle of refraction in the material is 40 degrees? Please show steps.

Science
What is one qualitative factor and one quantitative factor that affect the refraction of light as it passes from one medium to another?

Calculus
Find the following integral ? How , is it by substitution !!!!!!!!

Calculus
∫1/(x2 − 2x + 8)3/2 dx

Math
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