Questions Asked on
February 8, 2018

physics
A plane flies towards a groundbased radar dish. Radar locates the plane at a distance D = 41 km from the dish, at an angle of 52 degrees above horizontal. What is the plane's horizontal distance, from the radar dish.
asked by Sabdy 
Probability and statistics
For a single roll of two dice, are rolling a sum of 6 and rolling doubles independent events? Explain.
asked by Anonymous 
Physics
The radius of the Earth is about 6.37 × 106 m. a) What is the centripetal acceleration of a point on the equator due to the rotation of earth about its axis? Answer in units of m/s 2
asked by Liz 
Math
The toco toucan, the largest member of the toucan family, possesses the largest beak relative to body size of all birds. This exaggerated feature has received various interpretations, such as being a refined adaptation for feeding. However, the large
asked by Mike 
Vehicle
Is a pogo stick considered a vehicle?
asked by Anonymous 
math
A scientist is working with 7 meters of gold wire. How long is the wire in millimeters?
asked by Anonymous 
Science
How many calories of heat energy are required to melt 20 grams of ice at 0 °C? Answer: _____ calories How many calories of heat are required to evaporate 20 grams of liquid water at 0 °C? Answer: _____ calories
asked by JOHN 
Chem OxidationReduction Titrations
H2O2→ O2 + 2H+ + 2e OCl + 2H+ + 2e→ H2O+ Cl H2O2(aq) + OCl(aq) → H2O(l) + Cl (aq) + O2(g)Assign oxidation numbers to the following atoms: O in H2O2 ________; Cl in OCl __________The oxidizing agent for this RedOx rxn is_____________. The
asked by B 
Physics
A particle is projected at 10ms^1 from a height of 45m. Calculate the horizontal distance covered by the particle before reaching the ground(g=10ms^2)
asked by Anonymous 
Algebra
Jack and Jill regularly run around an 800meter track, but Jack runs 2 m/s faster. If they start from the same point on this track, and run in the same direction, Jack will eventually pass Jill in 6 minutes and 40 seconds. What is Jill's speed?
asked by AJ 
Algebra I
It is the grand opening of a local supermarket. Every 5th customer will receive a coupon for a free turkey and every 7th customer will receive a coupon for a free half gallon of ice cream. If 400 customers come in on opening day, how many people will get
asked by Bill 
Math :(
The scale of a map is 1 inch + 25 miles. How many miles does 1.25 inches represent? 25 miles 31.25 miles 62.5 miles 49.25 miles
asked by I Dont Matter 
Math
The local swimming pool is having a contest and all students are welcome to enter. The pool officials want a new logo that has rotational symmetry with 120⁰ and 240⁰ as its angles of rotation. Draw an entry for the contest.
asked by Amy 
MATH help can anyone check my answer plzz!!
1)evaluate the function for x=2f(x)=7x5 A)9 B)19 C)9 D)19 2)Candy is on sale for $0.75 each you have a coupon for $0.25 off your total purchase write a function rule for the coast on n pieces of candy. A)C(n)=0.25n0.75 B)C(n)=0.75n0.25 C)C(n)=1.0n
asked by that emo girl! 
algebra
Let A be an m×n matrix and b ∈ R m. Prove that the system of equations Ax = b is inconsistent if and only if there is a leading term in the last column of row echelon form of the augmented matrix
asked by sowmya 
Physics
A particle is projected at 10ms^1 from a height of 45m. Calculate the horizontal distance covered by the particle before reaching the ground(g=10ms^2)
asked by Anonymous 
geometry
Triangle PQR is an isosceles triangle. The side QP is produced to S. Such tha PQ=PS,prove tha angle QRS=90 degree.
asked by vikram 
chemistry
Which one of the following pairs has only London dispersion forces as the intermolecular force between them? 1.) H2O; HF 2.)He; He 3.) HCl; HCl 4.) Ne; HCl please help I am so lost
asked by kayla 
Math calculus 2
The revenue, in millions of dollars, for a company in year t is given by the function: R(t)=15*e^(0.08*t), 0≤t≤15 and the cost, in millions of dollars, to run the company in year t is approximated by: C(t)=12*e^(−0.04*t), 0≤t≤15 where t is the
asked by Anonymous 
physics
A person standing 1.00 m from a portable speaker hears its sound at an intensity of 7.50 103 W/m2. (a) Find the corresponding decibel level. (b) Find the sound intensity at a distance of 35.0 m, assuming the sound propagates as a spherical wave. (c)
asked by Megan 
art
What was the underlying message of Georges Seurat’s A Sunday Afternoon on the Island of La Grande Jatte? People in cities interact less as a result of modern life. Modern life has united people together. A painting should be an exact, realistic copy of
asked by Bri 
science
How do I prepare 3% H2SO4 from concentrated sulphuric acid (98% with density 1.84g/ml)?
asked by Baljit 
Physics
A 150m long train is moving with uniform velocity of 45km/hr.The time taken by the train to cross a bridge of length 850 meters is
asked by Raj 
Chemistry
Of the 3 elements fluorine, nitrogen, and carbon, what is the atomic number of the one that has the largest atomic radius?
asked by Austin 
physics
Q: A blue ball is thrown upward with an initial speed of 23 m/s, from a height of 0.5 meters above the ground. 2.8 seconds after the blue ball is thrown, a red ball is thrown down with an initial speed of 6.6 m/s from a height of 28.9 meters above the
asked by Alex 
Math
Which of the following expressions is between 10 and 11?
asked by Ariel 
Math (please help)
S is the midpoint of RT. Which of the following completes the statement? ST = 38 ft; RT = ? A)38 ft B)19 ft C)76 ft D)96 ft I'm not sure how to find the correct answer, can someone please help?
asked by Ace 
chemistry
What is the difference between dipoledipole interactions and dipoleinduced dipole interactions? 1.) dipoledipole interactions involve two non polar molecules. Dipole induced dipole interactions involve one polar molecule with a permanent dipole and one
asked by kayla 
Algebra
I have a pair of supplementary angles, the measure of one angle is 8 times the measure of the other. What is the measure of the larger angle? What is the measure of the smaller angle?
asked by Pat 
math help,,,,
solve the proportion 4/8 = w/32 w = 2 w = 7 w = 8 w = 16 i think its w = 2
asked by asdfjkl; 
math
Which of the following equations represents the line that passes through the point (0, 6) and that is parallel to the line x  4y  5 = 0? A x 4x  y  6 = 0 B x 4x  y  6 = 0 C x x  4y  24 = 0 D x x  4y + 6 = 0
asked by candy 
Chemistry
At 25oC, the equilibrium pressure of ammonia vapour above a 0.500 M aqueous ammonia solution is 0.84 kPa. Calculate the Henry's law constant for ammonia in M/bar. Do not include units. Include 4 significant figures.
asked by Joseph 
Maths
A godown is 50m long. 40m broad. And10m high. Find the cost of white washing its four walls ceiling at rs 20per square metre.
asked by Shehzad 
Science
A man with a genetic disease marries a woman who does not carry the disease. It is not possible for their sons to have the disease. The disease must be Xlinked dominat Ylinked dominat Xlinked reccesive Ylinked reccesive I'm reposting this because i
asked by Ray 
Chemistry
Write down the electron configuration of the Cu(I) ion in the format 1s2_2s2_2p6_etc_etc.
asked by Austin 
physics
A sled and rider have a total mass of 57.2 kg. They are on a snowy hill accelerating at 0.5g. The coefficient of kinetic friction between the sled and the snow is 0.20. What is the angle of the hill's slope measured upward from the horizontal? You may find
asked by joy 
Science
sample of alumium has a mass 6.3g.calculate the number of mole of alumium present and the number of atom of alumium in the sample(AL=27
asked by Gchjfe 
chemistry
Rain: From the standpoint of solutions what processes lead to rain fall or other forms of atmospheric precipitation?
asked by anden 
History Plz help i changed the answers
Ms. Sue, Reniy , Writeteacher . I changed my answers now can you check if they are correct? Please guys i really need a good grade 2. What role did nativism play in federal policy? A. Concern for immigrants' children led to increased public education
asked by Swimmer 
History
• what are the issues of Reconstruction covering its origins •what are the various reconstruction plans • how did the south show resistance •what were the factors that led to the end of this period?
asked by Reily 
Science
What are the important steps in empirical research?
asked by Kierra 
science
he Bowen ratio describes how available heat at the Earth's surface is partitioned between latent heating (changes in phase of water) and sensible heating (conduction and convection). An increase in the Bowen ratio of agricultural land is the consequence of
asked by Anonymous 
Science
What are the criticisms of empirical research?
asked by Kierra 
Math
I have a set of complementary angles, the measure of one angle is 8 degrees less than the measure of the other. What is the measure of the larger angle? What is the measure of the smaller angle?
asked by Pat 
Algebra
Billy was playing a trivia game. According to the rules, Billy would receive 25 points for each question he answered correctly but would lose 50 points for each question he answered incorrectly. At the end of the game, Billy had a total of 450 points. He
asked by Pat 
Math
Solve the proportion W/36=5/18 A. W=5 B. W=10 C. W=15 *** D. W=20
asked by pop 
physic
A force of 75.0 N in the horizontal direction is required to set a 37.3kg box, initially at rest on a flat surface, in motion. After the box begins to move, a horizontal force of 51.3 N is required to maintain a constant speed. (a) What is the coefficient
asked by joy 
Calc 3
Describe the locus of points in R3 equidistant from the origin (0, 0, 0), and the plane x + y + z = 1.
asked by James 
Math
Mandy is making name tags in the shape of triangles. They all should be the same size. Explain how she can use a pattern to make 25 name tags. How does she know they will all be congruent?
asked by Bingo 
Math
A pizza parlor divides a pizza into 7 equal slices. Each slice of pizza looks exactly the same. The pizza has rotational symmetry. What is the angle of rotation for the pizza?
asked by Jinyoung 
Math
Why it is not possible to have 290 in an angle
asked by Riya 
Help please
Mandy is making name tags in the shape of triangles. They all should be the same size. Explain how she can use a pattern to make 25 name tags. How does she know they will all be congruent?
asked by Bingo 
alegrba
which of the following is equivalent to 65% choose all that apply 0.065 0.65 13/20 13/25 (i tink it would be tis one)
asked by aaa batteries 
math
the sum of a number divided by 4 and 5 is 2.
asked by Anonymous 
Math
What data are represented by the stemandleaf plot below? 3)(7 8 9 4)(1 3 7 5)(2 4 Key: 4  1 means 41
asked by Dat Guy 
Physics
Tarzan tries to cross a river by swinging from one bank to the other on a vine that is 12.0 m long. His speed at the bottom of the swing is 8.3 m/s. Tarzan does not know that the vine has a breaking strength of 1.0 ✕ 103 N. What is the largest mass that
asked by Darylynn 
physics I need serious help please
A 1.49kg particle initially at rest and at the origin of an xy coordinate system is subjected to a timedependent force of F(t) = (4.00ti − 8.00j) N with t in seconds. (a) At what time t will the particle's speed be 14.0 m/s? s (b) How far from the
asked by joy 
math
which of the following square pyramids have a volume of 24 mm. choose all that apply
asked by Erica McDonnell 
mathd
A theatre has 11 riws if seats.which have 1to10 eries.unmatched numbers have fufteen sests and 16 seat have matched numbers.how many seats are there in theatre.?
asked by amarjit kaur 
math
Which of the following square pyramids have a volume of 24 mm. choose all that apply a square pyramid with a side length of 9 mm and a height of 8 mm a square pyramid with a side length of 3 mm and a height of 8 mm a square pyramid with a side length of 2
asked by Erica McDonnell 
chemistry
A sample of argon initially has a volume of 5.0 L and the pressure is 2 atm. If the final temperature is 30° C, the final volume is 6 L, and the final pressure is 8atm, what was the initial temperature of the argon?
asked by juhol 
math
Which of the following square pyramids have a volume of 24 mm. choose all that apply a square pyramid with a side length of 9 mm and a height of 8 mm a square pyramid with a side length of 3 mm and a height of 8 mm a square pyramid with a side length of 2
asked by Erica McDonnell 
Science
Geologist believe that The crystals inside a geode probably form when... A: Lava suddenly cools on earth’s surface B: Minerals dissolved in a solution evaporate C: Minerals dissolved in a solution crystallize D: magma cools slowly inside Earth Ok so
asked by PLEASE HELP!! 
english
"Power tends to corrupt, and absolute power corrupts absolutely" Do people with too much power tend to be corrupted by it? On the other hand, are there examples of people in positions of power that seem to use their status to do good? Define what it
asked by mstv1112 
Please help MATH
james is taking a test in his geomtery class. His teacher asked him to determine the equation of the line perpendicular to the line 2xy=3 and passing through the point (8,2) , which line should he choose. A. y+ 1/2x=6 B.y+2x=18 C. y2x=14 D. y +1/2x=9
asked by James 
Chem OxidationReduction Titrations
In our lab, the data consists of 1. Volume of NaOCl (mL): Trial 1= 10 ml & Trial 2= 10 mL. How can we find the concentration (Molarity), what would the calculated value be? 2. Volume of H2O2 (mL): Trial 1= 1/ml & Trial 2= 1/mL. How can we find the given
asked by B 
PreCal
a circular arch of length 3ft subtends a central angle of 25 degrees. Find the Radius of the circle I got 6.875 but i think that is wrong
asked by Kelly 
geometry
im not that good at geometry i need some one to check this for me XY bisects AB at point g which of the following is true about point g a. g is the mid point of AB b. g is the mid point of XY c. g is the mid point of AB and XY d. none of these*
asked by math 
Science
How is constructivism different from the scientific approach to research
asked by Kierra Merton 
social studies
How did textile factories improve the economy of South Carolina?
asked by kat 
Science
A Statement : A boy pushes a shopping trolley (weight due 2 gravity of 150N) with a constant force of 75N . A constant frictional force of 20N is present 1, Draw a laballed force diagram n a free body diagram of all the forces acting on the trolley.
asked by C ngomane 
Maths
A wire is in the shape of a square of side 10cm. If the wire is rebent in to a rectangle of length 12cm.find its breadth which figure encloses more area and by how much.
asked by Shehzad 
Science
Xlinked dominant Ylinked dominant Xlinked recessive Ylinked recessive
asked by Ray 
Maths
The area of the 4 walls of a room is 168metre square the breadth and height of the room are 10m and 4m respectively. Find the length of the room
asked by Shehzad 
Chemistry
What is the n quantum number for the last electron added in the Aufbau procedure for forming the electron configuration of uranium?
asked by Austin 
Chemistry
What is the l quantum number for the last electron added in the Aufbau procedure for forming the electron configuration of barium?
asked by Austin 
Science
So I’m awful at summarizing and I came up with the really long answer and I know I need it shorter because it’s definitely not gonna fit on two lines. Please help! Large amounts of heat or transferred to earths mantle from earths core and the mantle
asked by Oof help 
Chemistry
Of the 3 elements nitrogen, oxygen, and fluorine, what is the atomic number of the one that has the highest ionization energy?
asked by Austin 
Chemistry
Of the 3 elements fluorine, nitrogen, and carbon , what is the atomic number of the one that has the lowest ionization energy?
asked by Austin 
Chemistry
Of the 3 elements nitrogen , oxygen , and aluminum, what is the atomic number of the one that has the smallest atomic radius?
asked by Austin 
physics
Q: Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. The blue car accelerates uniformly at a rate of 5.7 m/s2 for 3.2 seconds. It then continues at a constant speed for 8.8 seconds, before applying the
asked by Alex 
physics
can somebody shows me how to get to the answer key a)=2.51s, b)=19.9m, and c)=11.8i16.1j A 1.57kg particle initially at rest and at the origin of an xy coordinate system is subjected to a timedependent force of F(t) = (7.00ti − 8.00j)N with t in
asked by joy 
Chemistry
Write down the electron configuration of sodium in the format 1s2_2s2_2p6_etc_etc.
asked by Austin 
Physics
Object 1, which has mass 100 kg, is moving at 3 m/s and collides with Object 2, which has mass 50 kg and is moving at 8 m/s. If the first object stops moving after the collision, how fast would the second object be moving at that time? I think the answer
asked by Anonymous 
Chemistry
What is the energy in Joules of a photon of light having a frequency of 1.000 1018 typical of the gamma ray region of the electromagnetic spectrum?
asked by Austin 
Chemistry
Calculate the pressure in atmospheres in the ocean at a depth of 3.20 km assuming the constant density of sea water in the water column is 1.10 g/mL. The atmospheric pressure is 1.00 atm.
asked by Austin 
dynamics
A force F=160N is applied to the cord. Determine how high the 400N block A rises in 2s starting from rest . Neglect the weigth of the pulleys and cord.
asked by doffy 
ART
why might a college choose to use Greek architecture elements when designing the central building on campus??? A.)to symbolize Grecian ideals of peace and love. B.)to symbolize Grecian ideals of truth and knowledge. C.)to symbolize Grecian ideals of
asked by Rose 
Science
What makes “reallife” empirical research different from this ideal model
asked by Kierra Merton 
differential Equations
solve the initial value problem and find the interval of existence... cos(y) dy/dt = t sin(y)/ (1+t^2) , y(1)=pi/2
asked by George 
Maths
Solve for: 4^x+4^(1/x)=18
asked by Rabin 
Science
Earthquakes and Seismic Waves •If the statement is true right true if the statement is false change the underlined word or words(I’ll put them in parentheses) to make this statement true.• 1.______The shaking and trembling that results for movement
asked by Molly 
physic
A 1.57kg particle initially at rest and at the origin of an xy coordinate system is subjected to a timedependent force of F(t) = (7.00ti − 8.00j)N with t in seconds. (a) At what time t will the particle's speed be 19.0 m/s? s (b) How far from the
asked by joy 
Math
It costs Luis $5 to park his car at a parking meter for 2 hours. What is the price to park for 1 hour? Write a word sentence to help you solve the problem. Then write and solve a multiplication equation. Please help me.
asked by BOI 
Maths
What is the probability that an year will have 53 Tuesdays
asked by DOM 
Math
An architect make a model of a building with a volume of 1440 cubic centimeters? The length of the model is 15 centimeters and the width is 12 centimeters. How many centimeters tall is the model
asked by Robert 
Physics
Please show each step: Tony burns a 0.6 gram peanut submerged in 50 grams of water, which increases its temperature from 22 to 50 ° C. a) Assuming an efficiency of 40%, calculate the nutritional value of the peanut. b) Demonstrate that the nutritional
asked by I REALLY NEED HELP! 
Physics
Hammering a nail into wood makes it get hotter. Consider a 5g long, 5gauge steel nail and a hammer that exerts an average force of 500 N on the nail when it is introduced to a piece of wood. The nail gets warmer each time. Demonstrate that the increase
asked by I REALLY NEED HELP! 
PreAlgebra
What are all the triangles classified by side? Click all that apply. Equilateral Acute Obtuse Isosceles Scalene Right
asked by Jaxson 
Physics
If you want to heat 100 kg of water at 20 ° C for your bath, calculate the amount of heat in the water. Then it shows that this is equivalent to 8360 kilojoules.
asked by I REALLY NEED HELP! 
Organic Chemistry
what would be the disadvantage of recrystallizing salicylic acid after is has already been recrystallized?
asked by andi 
University Genetics
In humans pattern baldness is a sexinfluenced trait, whose degree of expression is controlled by the sex of the individual, such that it is autosomal dominant in males while autosomal recessive in females. On the other hand, colour blindness and
asked by Jimmy 
Maths urgent
4^x+4^(1/x)=18
asked by Rabin 
math
Kate is a salesperson. she sold a computer printer for 76.85 and earned 20% commission. how much commission did kate earn?
asked by Anonymous 
math
A student’s score on the first four mathematics tests of the year were 80, 95, 92 and 89. What must the student score on the fifth test so that the mean score for all five tests is exactly 90?
asked by Carl 
Math
How is 1 an even number?
asked by Rakesh 
geography
How might the Pacific Island Trade Agreement (PICTA) help the Pacific islands trade with major markets all over the world? AThe region as a whole could partner to sell to bigger markets*** BIt will help the islands sell to each other not other markets
asked by Asher 
math
Mr. Bigelow's garden is a rectangle with dimensions x feet long and y feet wide. Its perimeter is 70 feet. a. Write a function to represent the perimeter of his garden. b. What are the x and yintercepts of the function? c. Does either intercept make
asked by skimmy 
science
What is mutation? 1.A mutation is a permanent change in the order of bases in the DNA. 2. A mutation is a permanent change in the way the cell carries out mitosis I think #1 Thanks
asked by Jamie 
Physics
If you want to heat 100 kg of water at 20 ° C for your bath, calculate the amount of heat in the water. Then demonstrate that this is equivalent to 8360 kilojoules. 20° C x 100 kg = 2000000 cal I'm unsure what to do after converting it to calories as to
asked by I REALLY NEED HELP! 
physics
Harry Potter decides to take Pottery 101 as an elective to satisfy his arts requirement at Hogwarts. He sets some clay (m = 4.00 kg) on the edge of a pottery wheel (r = 0.730 m), which is initially motionless. He then begins to rotate the wheel with a
asked by joy 
Math
Akio and 7 friends will share 3 liters of juice equally. How much juice does each person get?
asked by Zyriah 
Math
Nafi can row down a 20 mile stream in 2 hours and can return in upstream in 5 hours.What is his average rate,in miles per hour,for the entire trip? a.10/7 b.7/2 c.20/6 d.3 e.40/7
asked by Taijin 
Pre calc
Use half angle indentites to find an exact value without a calculator Cos(11π/12)
asked by Jacob 
Chemistry
Now if your lab partner determined that there were 1.157 x 1020 atoms of Mn in an unknown sample of KMnO4, how many milligrams would the unknown sample weigh?
asked by Drew 
Science
Egglaying land animals have evolved to produce eggs with tough shells to ensure that 1 external fertilization can take place. 2 the egg and sperm can fuse 3 parental care is unnecessary*** 4 the developing embryo does no dry out
asked by Ray 
Chemistry
Now if your lab partner determined that there were 3.824 x 1023 atoms of H in an unknown sample of C2H4Cl2, how many milligrams would the unknown sample weigh?
asked by Drew 
Math
Find the equation of the horizontal line that divides the area of the region in half y=18−x^2, y=0.
asked by Anonymous 
math calculus 2
Find the area of the region RR bounded by y=sin(x), y=cos(x), x=−π/3, x=13/6.
asked by Anonymous 
Calculus 2 (math)
A factory installs new machinery that will save 1250−38x dollars per year, where x is the number of years since installation. However, the cost of maintaining the new machinery is 81x dollars per year. Find the accumulated savings that will occur before
asked by Elizabeth 
math
In 2010 the birthrate in a certain country increases from 11*(e^(0.04*t)) million births per year to 16*(e^(0.04*t)) million births per year, where t is the number of years since January 1, 2010. Set up the integral and find the projected increase in
asked by James 
Web Design 1 B
Web Design I B Unit 1: Basics of HTML Lesson 7: Cascading Style Sheets (CSS) 1. In the following piece of CSS code, what is the rule? p { color: #676767 } A #676767 B color C p D p { color:3676767 } 2. In the following piece of CSS code, what is body
asked by Can You please help ASAP?!! 
Chemistry
Given the same reaction as before: 4 KO2 + 2 H2O + 4 CO2 ==> 4 KHCO3 + 3 O2 Great! 3.21 moles of O2 were produced. Now, How many molecules of O2 does this number of moles represent?
asked by Drew 
Science
What is continental drift?
asked by Jordan