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What is the efficiency of a pulley if 5000 joules of energy results in 3000 joules of work? Please show your calculations.
1. 1 answer
2. 45 views
List two ways a simple machine makes work easier.
1. 1 answer
2. 56 views
List an example for each of the followinga. Class 1 Lever b. Class 2 Lever c. Class 3 Lever
1. 1 answer
2. 32 views
List the three different types of simple machines
1. 1 answer
2. 45 views
A person pushes a box 6 meters and applies a force of 600 Newtons. How much work is being done? Please show your calculations.
1. 1 answer
2. 51 views
The sum p( q) is the number located a distance |q| from p in the negative direction.
1. 10 answers
2. 255 views
Use the stage directions to answer the question.Which stage direction shows that Zack is comfortable? (1 point) Responses ZACK:
1. 3 answers
2. 242 views
A squirrel has stored its acorns in a hole that is 45 feet from the ground in a tall tree. The squirrel moved from a perch 100
1. 2 answers
2. 614 views
48 c=___qtPLEASE HELP QUIETLY
1. 1 answer
2. 321 views
Salim and Medha are comparing results from a 2-day lab experiment. On Monday, Salim’s results showed that 0.907 of the
1. 4 answers
2. 1,150 views
What are some processes that a living thing’s body carries out to help it maintain homeostasis?
1. 1 answer
2. 494 views
Please help with the answer. What process helps an organism break down nutrients from its food in order to gain energy?
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2. 411 views
What makes up a habitat, and what do habitats provide to organisms?What is in the panda’s habitat that helps it to survive?
1. 3 answers
2. 712 views
Hi, I really need some help with the anwsers to the First one, having hard time, maybe some help plz?What are the
1. 1 answer
2. 1,198 views
What helped discourage invaders from trying to take over parts of Arabia?Where was Muhammad born? What did Muhammad say he had
1. 3 answers
2. 1,135 views
What contributed to the initial spread of Islam in the 600s and 700s?Why were Muslim warriors often successful? Besides
1. 7 answers
2. 960 views
A basketball explodes into three separate pieces. Two pieces of equal mass shoot off at 20.3 m/s, one travelling to the south
1. 1 answer
2. 889 views
Which polynomial does the model represent? and then it has one big black block, 2 thin white blocks, 3 thin black blocks, 3
1. 3 answers
2. 1,572 views
a factory can produce two products, x and y with a profit approximated by P=14x+22y-900. the production of y can exceed x by no
1. 3 answers
2. 2,648 views
Two capacitors C1 = 7.00 µF and C2 = 11.0 µF are connected in series to a 9.00 V battery.(a) Find the equivalent capacitance
1. 1 answer
2. 1,654 views
An air-filled capacitor consists of two parallel plates, each with an area of 7.60 cm2, separated by a distance of 1.70 mm.(a)
1. 0 answers
2. 612 views
Let N be the number that consists of 61 consecutive 3's.Let M be the number that consists of 62 consecutive 6's. What is the
1. 1 answer
2. 496 views
Six children are standing along the x-axis at points (0,0), (17,0), (40,0), (85,0), (173,0), (440,0). The children decide to
1. 1 answer
2. 436 views
What is the coefficient of x^4 in (x^2−x−2)^7?
1. 1 answer
2. 340 views
Children slide down a frictionless water slide that ends at a height of 1.80 m above the pool. If a child starts from rest at
1. 1 answer
2. 1,791 views
If a car takes a banked curve at less than the ideal speed, friction is needed to keep it from sliding toward the inside of the
1. 0 answers
2. 1,153 views
As shown in the figure below, a stick of lengthL = 0.330 m and mass m = 0.205 kg is in contact with a rough floor at one end and
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2. 638 views
A 0.330-kg block of wood rests on a horizontal frictionless surface and is attached to a spring (also horizontal) with a
1. 2 answers
2. 807 views
A mixture of gases contains 0.4 mole of N2, 0.5 moles of O2, and 0.7 moles of H2. What is the totalpressure if partial pressure
1. 1 answer
2. 833 views
A person travels 32 meters,turns right & travels 34 more meters. It took 3 minutes. What is her speed?
1. 1 answer
2. 845 views
Put these in order from least to greatest: 13/16, 5/8, 3/16, 3/4, 7/8.
1. 1 answer
2. 423 views
Mark has a square shaped tulip bed in his garden. The area of the tulip bed is 400 square feet. Mark wants to put a low border
1. 2 answers
2. 546 views
Put these in order from least to greatest: 13/16, 5/8, 3/16, 3/4, 7/8.
1. 2 answers
2. 893 views
Derive the integral of cos^n (x) dx= (1/n)cos^(n-1) (x) sin(x)+((n-1)/n)(integral of cos^(n-2) (x) dx
1. 0 answers
2. 448 views
The 50-kg stone has a speed of v_A = 8m/s when it reaches point A.Determine the normal force it exerts on the incline when it
1. 1 answer
2. 604 views
A 300 lb bungee jumper wants to jump from the top of a 230 ft high bridge and be able to just touch the water below (Part A
1. 1 answer
2. 1,919 views
I need to do this but I don't know how to start! I'm so bad a this class, and I'm just taking it because is a required! Please
1. 2 answers
2. 392 views
+3-(-3)-(-7)=please explain how you got the answer
1. 3 answers
2. 348 views
thank you Ms.Sue
1. 1 answer
2. 295 views
The area of each of the four states shown of the united states is given as fractions, decimals or percents of the total area of
1. 2 answers
2. 1,223 views
Dominic was 8 years old when his sister was born. Now the sum of their ages i 56. How old is Dominic now?
1. 1 answer
2. 1,154 views
.How did the battle between the Monitor and the Virginia change naval warfare?
1. 0 answers
2. 391 views
Both calcium sulfate and magnesium sulfate can form hydrates with water. Could white anhydrous CaSO4 or MgSO4 be substituted for
1. 3 answers
2. 822 views
A baker uses dried skim milk that contains 3.0% moisture and costs $1.16 per lb, which on a moisture free basis would be $1.20
1. 2 answers
2. 696 views
How would you prepare 1L of a .050 M phosphate buffer at pH 7.5 using crystalline K2HPO4 and a solution of 1 M HCl? pka of H2PO4
1. 4 answers
2. 3,839 views
How many total atoms are in 1.0 moles of H2O ?
1. 1 answer
2. 3,927 views
Convert 3.01 x 1023 molecules of C2H6 to moles.
1. 2 answers
2. 5,803 views
How many atoms does 2.0 moles of He represent?
1. 2 answers
2. 2,018 views
Hydrogen peroxide, H2O2, solution can be purchased in drug stores and used as an antiseptic. A sample of such a solution
1. 1 answer
2. 1,617 views
Calculate [Fe^2]+ when the cell reaction reaches equilibrium?A voltaic cell is constructed based on the following reaction and
1. 1 answer
2. 1,161 views
The complete combustion of 0.100 mol of CH4 in oxygen in a bomb calorimeter caused the water of the calorimeter to rise in
1. 0 answers
2. 564 views
A cell phone company offers a contract which cost C, in dollars, of t minutes to telephoning is given by C=0.25(t-400)+57.95,
1. 0 answers
2. 551 views
How would you find the Kb of a weak base??
1. 1 answer
2. 385 views
you need to move a 500 kg crate of gazelle food from the garage along the 42 meter hall to the kitchen. If you apply a force of
1. 1 answer
2. 535 views
A sneeze causes you to mementarily shut your eyes. If this process takes 0.5s and you are moving at 30km/h, how far will you
1. 1 answer
2. 567 views

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