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Derrick

Questions (92)

i) A breakdown truck tows a car of mass 1000kg along a level road, and accelerates at 0.5m/s2. What is the tension in the tow
1. 1 answer
2. 289 views
A girl gets n cedis pocket money each week. She saves her money for five weeks and buys a present for her mother which costs
1. 1 answer
2. 858 views
The coefficient of the expression 23y + 5
1. 1 answer
2. 559 views
In a simple machine the energy input is 120J. If the efficiency of the machine is 80%, calculate the energy output of the
1. 1 answer
2. 651 views
The distance, d, between two points, (x1,y1) and (x2,y2), can be found using the formula d=√(x2−x1)^2+(y2−y1)^2How can you
1. 2 answers
2. 1,826 views
Explain why a mixture of zinc oxide and magnesium reacts when heated while there is no reaction when a mixture of zinc and
1. 3 answers
2. 1,107 views
A car mass 800kg starts from rest and accelerates at 1.2m/s^2 .determine the final velocity attained by the car
1. 1 answer
2. 656 views
A man buys a car at 25 gh cedis.he pays 20% of the cost of his own resources and takes a loan for the remainder at 2.5% simple
1. 1 answer
2. 571 views
How many liters of HCl acid needed to dissolve at 1 ton of carbon and how long would it take?
1. 1 answer
2. 578 views
What is the "Percent Difference Formula for Momentum"?
1. 0 answers
2. 583 views
Zinc - .5 gramsHCl- .2 moles Find the Mass of ZnCl2 [How would you solve this?]
1. 1 answer
2. 366 views
I have the mass of one element and the moles of a compound, How do I find the mass of it'd Product? [Zn + 2HCl = ZnCl2 + H2]
1. 3 answers
2. 550 views
if a 1 kg mass is placed on top of the input piston what is the largest mass that the output piston
1. 0 answers
2. 389 views
Determine the oxidation states of Se and S in the products and reactants of the following equation. Amongst the reactants, which
1. 1 answer
2. 510 views
The length of a rectangle is four times its width. If the area of the rectangle is 392 yd, find the perimeter
1. 1 answer
2. 478 views
I need help setting these up.1.) Use the parallelogram rule to find the magnitude of the resultant force for the two forces
1. 2 answers
2. 5,317 views
In what way would Hill’s notion of “self-acceptance” correspond to Aristotle’s conception of eudaimonia? (Points : 1)
1. 0 answers
2. 433 views
How much work is done in lifting a 6kg object from the ground to a height of 4m?A 12n object is lifted 5m how much work is done
1. 1 answer
2. 1,379 views
In the Bohr model of the hydrogen atom, an electron in the 2nd excited state moves at a speed of 5.48X10^5 m/s in a circular
1. 1 answer
2. 1,498 views
A model rocket is launched at an angle of 80 degrees aboce the x axis, with a velocity of 30m/s. How high will the rocket be 5
1. 1 answer
2. 606 views
Factorization
1. 1 answer
2. 354 views
Algedra
1. 2 answers
2. 312 views
Two vertical poles, 3m and 7m long are on the same straight line with a point P on the ground. The shorter pole is 20m from P
1. 2 answers
2. 896 views
A pole 25m long is placed against a vertical wall such that its lower end is 7m from the foot of the wall on the same horizontal
1. 5 answers
2. 1,276 views
A 10 m platform diver during his diving can increase his rotation rate from an initial rate of 0.8 rev/s to a maximum of 3.3
1. 0 answers
2. 484 views
In a "Rotor-ride" at a carnival, people are rotated in a cylindrically walled "room." The radius of the room is 4.0 m, The
1. 0 answers
2. 760 views
Superman, who likes physics, dangles his watch from a thin piece of string while he is taking off from ground horizontally at a
1. 0 answers
2. 530 views
A 0.4kg ball, attached to the end of a horizontal cord, is rotated in a circle of radius 1.3 m on a frictionless horizontal
1. 1 answer
2. 784 views
Suppose the modified quota is 7.47. Fill in the blanks, and round your answers to two decimal places.(a) Find the lower quota.
1. 1 answer
2. 505 views
Suppose the modified quota is 7.47. Fill in the blanks, and round your answers to two decimal places.(a) Find the lower quota.
1. 0 answers
2. 441 views
A rental car agency charges $50 plus .25 cents per mile to rent a car. How many miles can you drive for $400? How many miles can
1. 1 answer
2. 1,461 views
If a mineral is 10g, how much oxygen is in the mineral.
1. 1 answer
2. 403 views
What is the value of the expression below?(3+2)x5-6(6/2) A.10 B.22 C.12 D.20 B?
1. 2 answers
2. 377 views
What is the value of the expression 7(3x18-10)A.53 B.168 C.186 D.308 D?
1. 2 answers
2. 497 views
Which choice gives the correct order of operations needed to find the value of 4(6+3)-24A.+,x,- B.x,+,- C.-,x,+ D.+,-,x A?
1. 1 answer
2. 445 views
Which choice gives the correct order of operations needed to find the value of 4(6+3)-24?A.+,x,= B.x,+,- C.-,x,+ D.+,-,x A? What
1. 2 answers
2. 681 views
What does 8+6(7-4)/9 equal? is it 6
1. 2 answers
2. 336 views
Which choice gives the correct order of operations needed to find the value of the expression below?6+7(5-2)/3 A.+,-,x,/
1. 3 answers
2. 501 views
40 North latitude and 160 west longitudePacific Oceann? 23 North latitude 5 East longitude Sahara Desert? 10 South latitude and
1. 5 answers
2. 3,554 views
23 degrees north latitude 90 degrees west longitudeGulf of mexico?
1. 1 answer
2. 560 views
What is 22 degrees south latitude and 43 degrees west longitude?Rio de Janeino?
1. 5 answers
2. 1,089 views
What is located on 60 north latitude and 85 west longitude?
1. 7 answers
2. 2,895 views
What is located on 80 north latitude and 140 west longitude?
1. 1 answer
2. 916 views
Find a point P on curve y = x^3 such that the slope of the line passing through point P & (1,1) is 3/4.
1. 0 answers
2. 376 views
write the structural formula for the dipeptide formed when the carboxyl end of cysteine bonds to the amino end of valine
1. 0 answers
2. 375 views
5 cards are drawn at random from a standard deck of playing cards. What is the probability that all are the same suit?
1. 2 answers
2. 916 views
2 questions please:The highest positive oxidation number that chlorine can exhibit an any compound is +7, whereas its most
1. 0 answers
2. 572 views
Which of the following are redox reactions?(a) Ba(NO3)2 (aq) + H2SO4 (aq) -> BaSO4 (s) + 2 HNO3 (aq) (b) NH4NO2 (s) -> N2 (g) +
1. 1 answer
2. 4,562 views
Pure water is added to 25.0 mL of a 1.00 M HCL solution. The new solution has a volume of 2.00 L. What is the pH of the new
1. 1 answer
2. 606 views
The first transcontinental road in the United States ran from New York City to where?
1. 1 answer
2. 917 views
What event in the U.S. History took place at Appomattox Court House in Virginia?
1. 2 answers
2. 521 views
Which is the closest to the speed of sound in air?A. 7miles per hour B. 70miles per hour C. 700miles per hour D. 7000miles per
1. 1 answer
2. 1,134 views
Robert and his dad want to build a sandbox for his sister's birthday.They wanted it to be 4 feet wide and have an area of 28
1. 1 answer
2. 762 views
How does a periscope work when it has 2 mirrors and light?A.Lenses refract the light B.Light bends as it travels and mirrors
1. 0 answers
2. 1,113 views
How does a periscope work when it has 2 mirrors and light?A.Lenses refract the light B.Light bends as it travels and mirrors
1. 1 answer
2. 634 views
Robert and his dad want to build a sandbox for his sister's birthday.They wanted it to be 4 feet wide and have an area of 28
1. 1 answer
2. 814 views
1.What is refraction? The bending of light as it passes through matter2.What type of lens would you use to magnify your view of
1. 3 answers
2. 1,030 views
The table shows the number of lemons needed to make different numbers of pitchers of lemonade24lemons 3pitchers 32lemons
1. 3 answers
2. 680 views
Norton has cycled 15 miles and has drunk 7 liters of water. Which is the most reasonable prediction of the number of liters of
1. 2 answers
2. 374 views
Allison's 11th birthday is just around the corner. Her parents are remodeling her bedroom for her birthday. They will replace
1. 6 answers
2. 651 views
Max's pencil was 8/23ft and Ian's pencil was 6/12.How much loner is Max's pencil than Ian's? A.2/12 B.4/12 C.6/12 D.14/12 Is it
1. 4 answers
2. 385 views
The Surpreme Court ruled that slaves were not citizens of the U.S. and had no rights.Answer:Dred Scott decision The number of
1. 1 answer
2. 687 views
Carlos counted all of the tickets that were taken at a school carnival. Each time he counted 10 tickets, he placed a tally on
1. 2 answers
2. 994 views
The table shows the times a train left Austin and arrived in San Antonio on 5 nights last week.Mon 6:30pm left 7:22pm arrived
1. 1 answer
2. 1,128 views
Mrs. Garcia's class is making a banner to hang in the school's display case. They started by sewing 7/8 of a yard of gold fabric
1. 1 answer
2. 678 views
Which is not a subunit of the Department of Health and Human Services?
1. 2 answers
2. 568 views
The perimeter of a rectangular field is 560m.The length of the field is an eigth third of this distance.Find the length of the
1. 1 answer
2. 644 views
Write the pseudocode for a program to calculate the wages of a sales according to the following rules. The wage is calculated at
1. 3 answers
2. 2,253 views
Write the pseudocode for a program to calculate the wages of a sales according to the following rules. The wage is calculated at
1. 1 answer
2. 958 views
How far away from the earth does acceleration due to gravity become 1% of its value at the earth's surface. Assume that the
1. 1 answer
2. 506 views
For what values of a and b that make the function f continuous everywhere.f(x)={(x^2-4)/(x-2) if x<2 ax^2-bx-18 if 2<x<3 10x-a+b
1. 1 answer
2. 1,023 views
A 3kg block is resting on a table with a coefficient of friction of 0.4. It is now pushed with a force of 15n. What is the
1. 1 answer
2. 515 views
who was alleys with Britain during the war of 1812?
1. 1 answer
2. 423 views
What is needed for nuclear fusion to occur?pressure, a beta particle or high temperature? I think it's only high temperature and
1. 4 answers
2. 591 views
What is used to tell different isotopes of a particular element apart?A. the mass number B. the atomic number C. the number of
1. 3 answers
2. 1,130 views
Which of the four factors affecting reaction rate is most important in each example below? Choose from among concentration,
1. 2 answers
2. 2,265 views
These are the other equations I've balanced. I need help with one.AgNO3 + K2Cr2O7 --> double replacement AgNO3 + K2Cr2O7 -->
1. 2 answers
2. 693 views
DrBob222 I am kind of stuck with the balancing stuff, and I already had send the post, did you not read it?
1. 3 answers
2. 434 views
This question is very confusing, I do not understand what it wants me to do.Each reaction below has been identified by type. Use
1. 14 answers
2. 1,356 views
Recognize each of the following reactions as synthesis, decomposition, single replacement, double replacement, neutralization,
1. 1 answer
2. 1,711 views
DrBob222 I am beginning to understand about balancing equations well, thanks to your help, but there are still some other
1. 1 answer
2. 667 views
Complete and balance the following neutralization reactions. then, write the names of all the reactants and all the products in
1. 5 answers
2. 2,000 views
Thank you sir for helping me out with those chemistry problems.
1. 0 answers
2. 379 views
Balance each of the following skeleton equations. This is the last one left to balance.D) C4H10 + O2 -> CO2 + H2O = C4H10 + O2
1. 1 answer
2. 913 views
Balance each of the following skeleton equations.C) C3H8 + O2 -> CO2 + H2O This one was a bit harder for me to balance out, but
1. 1 answer
2. 840 views
I was getting restless to post these questions, so I decided to go ahead and post them.Balance each of the following skeleton
1. 1 answer
2. 480 views
Balance each of the following skeleton equations.A) KCl + Pb(NO3)2 -> PbCl2 + KNO3 I balanced it out like this. KCl2 + Pb(NO3)2
1. 1 answer
2. 1,324 views
List the total number of each type of atoms in the following reactants.A) 2HCL + Ca(OH)2 = 6 hydrogen, 2 carbon, 2 lithium, 2
1. 2 answers
2. 1,192 views
When it says, " Draw a Lewis diagram for each of the following. "a)One atom of each of the elements in the second period. Is it
1. 4 answers
2. 712 views
Draw a bohr diagram of the protons and electrons in each of the following:The ionic compounds lithium fluoride, LIF, and
1. 2 answers
2. 1,187 views
Draw a Bohr diagram of the protons and electrons in each of the following.a) an atom of magnesium Do I draw this with 19 atoms
1. 9 answers
2. 699 views
Name and give the symbol for each of the following:a)the element in period 3 group 2 = Magnesium = Mg b)the halogen in period 4
1. 4 answers
2. 1,757 views

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