Questions Asked on
May 2, 2020

physics
A uniform metal rod of length 80cm and mass 3.2kg is supported horizontally by two vertical springs balances C and D.Balance C is 20cm from one end and while balance D is 30cm from the other end.Find the reading on each balance.
asked by james 
History
Which best defines the “stab in the back” myth? It is the idea that Jews betrayed Germany by orchestrating its defeat in World War I. It is the belief that the Weimar Republic would betray Germany if allowed to remain in power. It is the idea that
asked by Student 5 
math
10 teams enter a soccer tournament. In the first round teams paired in 5 pairs to play with each other. Assume that now in each match one of the teams marked as "HOME" and the other "AWAY" and first 5 games need to run one after another. How many different
asked by it 
Physical Science
How much does it cost to operate a 28W porch light for 24 h if electric energy costs 8¢/ kWh .
asked by Mary 
Math
One of the roots of the equation x^2−6x+q=0 is 4.5. Find the other root and the value of the coefficient q.
asked by Anonymous 
Chemistry
Why isn't iron usually recommended in the construction of steam pipes and boilers?
asked by Anonymous 
chemistry
Determine the [OH−] of a solution that is 0.240 M in HCO3− (Ka1=4.3×10−7). Determine the pH of this solution.
asked by trump 
math
Find the number of the permutations with the letters of the word TRIANGLE.
asked by random 
chemistry
Determine the [OH−] of a solution that is 0.130 M in CO32− (Kb=1.8×10−4). Determine the pH of a solution that is 0.130 M in CO32− Determine the pOH of a solution that is 0.130 M in CO32−.
asked by trump 
Math
One hat and two shirts cost $21. Two hats and one shirt cost $18. Sam has exactly enough money to buy one hat and one shirt. How much money does Sam have?
asked by Joshy 
Statistics
a) Banting is believed to reduce weight when done for a minimum of 10 days. A random sample of 5 ladies were weighed before and after Banting. The data is displayed on a table below. Person Weight before Weight After 85 96 105 78 90 120 Construct a 95% for
asked by Gibbons 
chemistry
Calculate the concentration of all species in a 0.145 M solution of H2CO3 (Ka1 is 4.3×10−7 and Ka2 is 5.6×10−11). Calculate the concentration of H2CO3. Calculate the concentration of HCO−3. Calculate the concentration of CO2−3. Calculate the
asked by trump 
History
How did the Nile River impact ancient Nubia ?
asked by Anonymous 
Math
Solve the following inequalities, if it is known that function g is decreasing on its domain. 1. g(3x^2−2x)≥g(3x−2), Dg=ℝ 2. g(x^3−4x) 3. g(5−x^2)≤g(3x−5), Dg=(−∞,4) 4. g(x^2−3x)≥g(4x−12), Dg=(−∞,0]
asked by Anonymous 
Biology
Why neuroendocrine cells in the duodenum are the ones responsible for secretion, chemical modification and storage, reuptake, and digestion of a protein?
asked by Mary 
Science
Why pars distalis is not a good candidate for transplantation?
asked by Andy 
Chemistry
When water and kerosene are mixed in the container , which one forms the upper layer?give reasons
asked by Happy 
art
The only way for artists to control movement in their works is to position important objects on the lefttoright path along which viewers naturally read text. True False*
asked by pbody 
Physics
there are four individual transformer feeder having connected loads of 250 kva, 300 kva, 350 kva, demand factor of these are 80%, 70%, 75% and 90% respectively diversity factor is 1.6 find the total demand of load and size of transformer required to supply
asked by V Roy 
math
Frank has 10 different shirts, 4 different pants, and 3 different pairs of shoes. How many different outfits can he create?
asked by Anonymous 
social studies
Which of the following are true about railroad expansion in the late 19th century? Choose all that apply. A. It led to new managerial forms and techniques. B. It accelerated the growth of new territories. C. It was financed by the government. D. It grew
asked by hjik 
chemistry
Write chemical equations and corresponding equilibrium expressions for each of the two ionization steps of carbonic acid Write chemical equations for first ionization step of carbonic acid write chemical equations for second ionization step of carbonic
asked by trump 
mathematics
Calculate the total surface area of the solid cone or vertical height 24cm and base diameter 14cm use the value 22/7 for pier
asked by Taofik 
Mathematics
The first term of an AP is 5 and the fifteenth term is double the third term. Find the eleventh term of the progression.
asked by Jabba 
Social Studies
How are the economies of South America Different. Please answer me :)
asked by Super Nova 
Chemistry
A sample on analysis shows 50% CaO, what will be the % of calcium carbonate in it?
asked by Gbolliscent 
Chemistry
The equation for a normal calibration curve for the detection of iron(II) is determined experimentally to be 𝐴 = 12.93 𝑀−1 [𝐹𝑒 2+] + 0.0017 Analysis of a sample with unknown concentration gives an absorbance reading of 0.106. What is the
asked by Shiro 
Physics
If a man stands on the floor and weight 90kg and the area between his legs is 0.0368 m sq . What is the pressure exerted on the floor if he stands with one leg
asked by Toshni 
Science
To create animals that have characters of both species, some people have bred buffalo and cattle together. this is an example of a. inbreeding b. hybridization c. genetic engineering d. transformation My answer is hybridization?
asked by Mightbe 
Physics
State the reason why a steel sphere resting on a horizontal surface is said to be in neutral equilibrium.
asked by William 
Physics
Principle of moments.
asked by William 
Chemistry
Name two ions which cause temporary hardness of water and two ions which cause permanent hardness.
asked by Happy 
Math algebra
an electrician cuts a 17 ft piece of wire into two pieces one piece is 11 ft longer than the other how long are the pieces
asked by Kendra 
Physics
Pendulum clocks tend to use quite large masses.Why?
asked by Lee 
math
A ladder of 8 m is leaning against a wall begins to slide. If its upper end slides down the wall at a rate of 0.25 m/sec, at what rate is the angle between the ladder and the ground changing when the foot of the ladder is 5 m from the wall? I would like
asked by anonymous 
spanish
Do now: A) Completa la oración con las letras que completan la palabra adecuada. 1. Quiero ir al ___________a a ver diferentes tipos de peces. 2. Un famoso p_____ d__ d_____ es Six Flags. 3. Me gusta ver a los monos (monkeys) jugando cuando voy al
asked by anonymous 
math
Zip code contains 4 digits. How many zipcodes can be created with digits 0−9 if you can use each digit only once and zip code can not start with 0.
asked by random 
algebra
Which of the quadratic functions has the narrowest graph? a. y=x^2 b. y=1/3x^2 c. y=3x^2 d. y=1/5x^2
asked by taylor 
geometry
How do you find the slant height of a cone with a height of 12.5 cm and a diameter of 7cm?
asked by F. D. R. 
math
Find the Surface area and volume of a cone with a height(not slant height) of 12.5cm and a diameter of 7cm. How do I show work for this?
asked by F. D. R. 
Math
Let g(t) be the Glucose concentration in blood stream of a person at time t. g(t) = 1/k(R  (R  k*go)e^(kt/v)) Where go  initial glucose concentration (at t=0), v  volume of blood in Humana body , R  rate at which glucose is introduced into blood
asked by Ashley 
chemistry
What volume of a 15.0% by mass NaOH solution, which has a density of 1.116 g/mL, should be used to make 4.95 L of an NaOH solution with a pH of 10.4? Express your answer to three significant figures and include the appropriate units.
asked by trump 
Maths:
As in the diagram,let A,B,C,D be the centers of the 4 balls in the bottom layer,and A',B',C',D' be the center of the 4 balls in the upper layer.then A,B,C,D and A',B',C',D' are the 4 vertice of the squares of length 2cm,respectively, now the circumscribed
asked by Kenny 
chemistry
Amphetamine (C9H13N) is a weak base with a pKb of 4.2. Part A Calculate the pH of a solution containing an amphetamine concentration of 220 mg/L .
asked by trump 
Mathematics
2+2i, 22i, 2√3+2√3i forms an equilateral triangle
asked by Mohammed 
physics
A 6volt battery of internal resistance 0.5ohm is connected to three resistors of value, 3ohm, 4ohm, and 5ohm. Calculate the current in each resistor, but the 4 and 5ohm resistors arein parallel.
asked by istifanus 
Math
How would u write "$18 per week plus $2 for each visit to the event" in y=mx+b form?
asked by Anonymous 
Geometry
As in the diagram,let A,B,C,D be the centers of the 4 balls in the bottom layer,and A',B',C',D' be the center of the 4 balls in the upper layer.then A,B,C,D and A',B',C',D' are the 4 vertice of the squares of length 2cm,respectively, now the circumscribed
asked by Kenny 
Math
Solve the following inequalities, if it is known that function f is increasing on its domain. 1. f(x^3−4x)≥f(3x^2+6x), Df=ℝ 2. f(x^4−x) 3. f(4x−3)≥f(2−x^2), Df=(−8,4) 4. f(x^2−5x−7)≤f(5−6x), Df=[−1,∞)
asked by Anonymous 
math
(c^2 − a^2 − b^2)^2 − 4a^2b^2.
asked by Bella 
Math
(1−1/2^2)(1−1/3^2)(1−1/4^2)...(1−1/99^2)(1−1/100^2).
asked by Bella 
Math
(2020^2−2018^2)(2020^2−2017^2)...(2020^2−0^2)/(2019^2−2018^2)(2019^2−2017^2)...(2019^2−0^2)
asked by Bella 
Math
From a sequence i have the explicit formula i have to make it to exponential function then find ratio and y intercept is this correct 5× 4^x1 F(×)= 5 (4)^x1 Ratio = 4 Yint = 5
asked by Gissell 
Chemistry
The regression line from a plot of absorbance vs. concentration yields: 𝐴 = 2.31[𝐶] + 0.002. If the absorbance of an unknown is measured to be 0.124, what is the concentration of the analyte [𝐶]?
asked by Shiro 
Chemistry
If a sample of hexane with benzene had an absorbance of 0.153 at 256 nm in a cuvette with 1.000cm path length, find the concentration of benzene in molarity.
asked by Shiro 
Chemistry
A chromate 𝐶𝑟𝑂4 −2 solution has an absorbance of 1.534 when the cell length is 1.5 cm. If the molar absorptivity of chromate ion is 5.21 × 103 𝑀−1 𝑐𝑚−1 , calculate the concentration of chromate ion.
asked by Shiro 
math
The data below shows the number of birds spotted by a bird watcher each hour over 10 hours: 7, 11, 14, 3,17, 15, 21, 17, 10, 12 a. Create a cumulative frequency table to represent the data: Birds Spotted: Frequency: Cumulative Frequency: please help
asked by 𝓜𝓘𝓐