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Suppose that $6,400 is invested at 0.5% interest, compounded monthly. How much, to the nearest penny,
is in the account after 7
1 answer
436 views
I have two questions that I do not know how to answer. Thanks for your help!
1. Calculate the [OH^-], [H^+], pH, and pOH for a
1 answer
441 views
How would you determine if a given compound is acidic, basic or neutral? Also if given a compound, how would you determine if
1 answer
642 views
A block of mass m is pulled across a level surface by a rope that makes an angle θ with the horizontal. The coefficient of
2 answers
1,391 views
A man pushes 100.0 N on the handle of a 40.0 kg lawnmower. The applied force is in the same direction as the handle, which is
0 answers
715 views
A 24.00 kg block at rest on a horizontal frictionless air track is connected to the wall via a spring. The equilibrium position
2 answers
665 views
A grocery store sells snacks by weight. A six ounce bag of mixed nuts costs $3.60. Predict the cost of a two ounce bag. Please
3 answers
1,829 views
Gina's art teacher mixes 9 pints of yellow paint with 6 pints of blue paint to create green paint. Gina mixes 4 pints of yellow
3 answers
965 views
Which of the following stylistic movement best represents Weird Al Yankovic's song Canadian Idiot? Would it be existentialism,
1 answer
857 views
On December 16, 1811, an earthquake occurred near New Madrid, Missouri, that temporarily reversed the course of the Mississippi
1 answer
1,497 views
Tomas makes balloons sculptures at a circus. In 180 minutes, he uses 252 balloons to make 36 identical balloon sculptures. Part
7 answers
2,039 views
Ed is using the recipe shown to make fruit salad. He wants to use 30 diced strawberries in his fruit salad. How many bananas,
13 answers
4,263 views
If an object is propelled upward from ground level with initial velocity of 55 feet per second, it's height h in feet t seconds
1 answer
1,188 views
A rescue plane is flying horizontally at a height of 132 m above the ground. The pilot spots a survivor and releases an
1 answer
1,318 views
I have to write a 5 paragraph comparison and contrast essay on Agamemnon, Hamlet, and The Love song of J. Alfred Prufrock. When
1 answer
1,004 views
Problem 6 [Total 5 marks] The drug Ziac is used to treat hypertension. In a large clinical trial it was found that 32% of those
0 answers
533 views
A communications tower is located at the top of a steep hill, as shown. The angle of inclination of the hill is 58°. A guy wire
3 answers
11,882 views
List these numbers from least to greatest
7/3, 3/4, 2/3, 0.5, 1.3
3 answers
528 views
the area of a rectangular picture frame is 30 1/3 square inches. the length of the frame is 6 1/2 inches.please help find the
1 answer
684 views
Dao has 2 3/8 pounds of hamburger meat. he is making 1/4 pound hamburgers. does Dao have enough meat to make 10 hamburgers?
2 answers
771 views
Jeremy has 4 1/2 cups of iced tea. He wants to divide the tea into 3/4 cup servings. use the model to find the number of
4 answers
1,515 views
a number and its absolute value are equal.if you substract 2 from the number, the new number and its absolute value are not
2 answers
689 views
the deepest point in elevation in the indian ocean is the java trench, which is 25,344 feet below sea level. elevations below
10 answers
2,118 views
two students are playing a math game. the object of the game is to make the least possible number by arranging the given digits
1 answer
1,163 views
If the absolute value of a negative number is 2.78, what is the distance on the number line between the number and its absolute
1 answer
576 views
How would I find the concentration of an unknown acid if I have a Ka value of 3.98x10^-5?
3 answers
493 views
A parallelogram is determined by the vectors a = [-2, 5] and b = [3, 2]. Determine the diagonals of the parallelogram.
1 answer
667 views
Beth leaves a dock in a motorboat travelling at 14 m/s. She heads downstream at an angle of 40° to the current, which flows at
2 answers
1,247 views
For the vectors x=(0,6,-5), y=(2,1,4) and z=(-2,3,-1) what is the value of (2x+y)·(3y-z)? (dot product question and each letter
2 answers
485 views
Nikki is driving a motorboat across a river that flows at 5 m/s. The motorboat has a speed of 12 m/s in still
water. She heads
1 answer
2,249 views
Determine (6i+2j)· (i-4j+k)
This is a dot product question and each letter has the vector symbol
1 answer
738 views
Codeine phosphate is a drug used as a painkiller. A common brand contains 30 mg of codeine. Samples of blood were taken at
1 answer
1,016 views
I am given that volume of an unknown acid is 25 mL, volume of NaOH is 13 mL and concentration of NaOH is 1.0 M. I have a graph
1 answer
510 views
Can you please explain if it would be possible to calculate the K value if more than one product or reactant in a chemical
5 answers
434 views
I am to do an equilibrium constant lab and I am supposed to only find the Kc value. i have to find the equilibrium constant for
1 answer
583 views
An astronaut in a spaceship is listening to his music. Calculate the time it takes to play a 4.00 minute song at 0.1c
2 answers
692 views
I need help with this question. Would you be able to explain it please?
Double slit interference patterns exhibit mλ path
0 answers
521 views
Can you please explain how to solve this question? Would I need to use the formula nλ=dsin(theta)?
Red light with a wavelength
0 answers
513 views
The answer for this question is ΔHrxn=-441.40174468085 kJ/mol but I don't know how to arrive to that answer.
0.47g of magnesium
1 answer
570 views
At exactly the critical angle:
a) all light reflects back into the n1 medium b) all light reflects back into the n2 medium c)
0 answers
430 views
A critical angle of 24.4 degrees applies to:
a) light travelling from air into diamond b) light travelling from diamond into air
0 answers
596 views
In what ways does the World Health Organization assist healthcare?
1 answer
469 views
At exactly the critical angle:
a) all light reflects back into the n1 medium b) all light reflects back into the n2 medium c)
0 answers
514 views
Would the answer be b)? diamond into air?
A critical angle of 24.4 degrees applies to: a) light travelling from air into diamond
0 answers
1,296 views
light travelling in air is incident on a soap bubble. If the path difference through the soap bubble is 2.5λ:
a) constructive
1 answer
702 views
How would I figure out the answer to this question?
A critical angle of 24.4 degrees applies to: a) light travelling from air
1 answer
742 views
light travelling in air is incident on a soap bubble. If the path difference through the soap bubble is 2.5λ:
a) constructive
0 answers
1,175 views
light travelling in air is incident on a soap bubble. If the path difference through the soap bubble is 2.5λ:
a) constructive
1 answer
845 views
light travelling in air is incident on a soap bubble. If the path difference through the soap bubble is 2.5λ:
a) constructive
0 answers
583 views
Light travelling in water is incident on air refracts at an angle of 27 degrees. What is the angle of incidence?
my answer: 37
0 answers
573 views
Light travelling in water is incident on air refracts at an angle of 27 degrees. What is the angle of incidence?
my answer: 37
0 answers
627 views
1. If the period of a wave is 0.27s, how many waves would pass by in 1.0 minute?
2. When a wave from of light passes through an
1 answer
934 views
Refraction is:
a) the way light behaves when it goes through a narrow opening b)the way teo light sources interact to produce
1 answer
418 views
1. If 31 waves pass by a point in 1.7 s, what's the frequency?
my answer: 18.2 Hz 2. if a crest with an amplitude of 7cm
1 answer
598 views
Red light with a wavelength of 660 nm and blue light with a wavelength of 480 nm are beamed at a double slit with a separation
0 answers
502 views
Why would you subtract the heat of a calorimeter when calculating heat of the reaction? hint: the heat of the calorimeter is the
0 answers
630 views
Question: Explain whether using solid NaOH pellets rather than aqueous NaOH would alter the enthalpy. If different, would it be
1 answer
720 views
Fill in blank:
Two slits can produce an interference pattern with visible light but this maximal point of constructive
1 answer
723 views
Fill in blank
Increasing the distance between a pair of slits through which light is being shone would ___ the distance between
1 answer
1,149 views
A human's wavelength is similar to the size of:
a) a cell b) atom c) nucleus d) proton e) something else and why?
1 answer
546 views
I am to fill in the blanks without a word bank, my answers are in brackets.
1. When light waves reflect from media in which the
2 answers
1,568 views
I am to fill in the blanks without a word bank, my answers are in brackets.
1. A ____ diffraction pattern is unique because it
1 answer
2,810 views
The following figure represents the ride for a cart with a mass of 200 kg along a frictionless track.
a. Calculate the velocity
1 answer
1,235 views
Why would you subtract the heat capacity of the calorimeter when calculating the heat of the reaction?
2 answers
575 views
For the equation q=cΔt, q=100KJ, initial temp=20 degrees celsius, final temp=31.4 degrees celsius and I need to find c. Do I
1 answer
1,007 views
Fill in blank without a word bank (unit is wave nature of light)
1. As water waves travels through a slit barrier, they bend and
2 answers
1,284 views
For an enthalpy lab, why would calculated value differ from the theoretical value (in percent error) for the heat reaction of
1 answer
1,764 views
Find the enthalpy of combustion of magnesium using Hess' law given the following data (assume that exactly 100.0 mL of HCl was
2 answers
1,066 views
why can't the enthalpy of magnesium be measured using a coffee cup calorimeter?
3 answers
453 views
It is ok to have a negative percent error? I got a negative value for the percent error of the enthalpy of the formation of
1 answer
1,055 views
The combustion reaction of Mg +1/2 O2-->MgO produces a very bright white flame and high heat. Verify that the following
1 answer
991 views
I am to use this formula to find ΔH°f,methane:
ΔH°comb=2ΔH°f,water+ΔH°f, carbon dioxide-ΔH°f,methane-2ΔH°f,oxygen For
1 answer
1,086 views
A calorimeter is filled with 10.0 millimole (mmole) of methane gas and an excess of oxygen. When burned, the ignition wire
4 answers
864 views
I have previously posted this question, but now I am lost
question: A calorimeter is filled with 10.0 millimole (mmole) of
4 answers
704 views
I got 0.907 KJ for ΔHcomb but I don't know if its correct. I also don't know how to write the equation.
-------- question: A
1 answer
809 views
I got 0.907 KJ for ΔHcomb but I don't know if its correct. I also don't know how to write the equation.
-------- question: A
2 answers
695 views
Einstein sought to discover a unified field theory that would explain the behaviour of all fields. What evidence have you seen
0 answers
520 views
A particle with a charge of -4.0x10^-5 C, a mass of 2.0x10^-7 kg and a velocity of 6.0x10^4 m/s [W] is travelling
0 answers
492 views
A charge with a value of 3.0 x 10^-5 C is located 3.0 cm from a charge with a value of 6.0 x 10^-5 C. Determine the distance
0 answers
550 views
How would polyethylene have the VSEPR shape of tetrahedral?
1 answer
631 views
A particle with a charge of -4.0x10^-5 C, a mass of 2.0x10^-7 kg and a velocity of 6.0x10^4 m/s [W] is travelling
0 answers
494 views
A charge with a value of 3.0 x 10^-5 C is located 3.0 cm from a charge with a value of 6.0 x 10^-5 C. Determine the distance
0 answers
527 views
A particle with a charge of -4.0x10^-5 C, a mass of 2.0x10^-7 kg and a velocity of 6.0x10^4 m/s [W] is travelling
0 answers
537 views
A charge with a value of 3.0 x 10^-5 C is located 3.0 cm from a charge with a value of 6.0 x 10^-5 C. Determine the distance
0 answers
537 views
A particle with a charge of -4.0x10^-5 C, a mass of 2.0x10^-7 kg and a velocity of 6.0x10^4 m/s [W] is travelling
0 answers
1,009 views
A 1000 kg rocket without an internal propulsion system is launched with an initial speed of 7.00 x 10^2 m/s. Determine the
1 answer
530 views
1. which of the following is not true about magnetic field lines
a) mag. field lines flow from North to South inside the magnet
2 answers
1,322 views
Would the answer be c?
The electrical potential 10 cm from an electron is: a) 1.4x10^-8 V b) 1.4x10^-10 V c) 1.4x10^-7 V d)
2 answers
920 views
Would the answer be a?
Which two forces balanced in the Millikan oil drop experiment a) electric and gravitational b) electric
1 answer
777 views
The escape velocity on the moon is:
a) 5.64x10^6 m/s b) 1.68x10^3 c) 160 m/s d) 2.38x10^3 m/s
2 answers
463 views
If the electric field near a proton is 9.00 x 10^-3 N/C, what is the distance from the proton?
3 answers
1,016 views
explain whether using solid sodium hydroxide pellets rather than aqueous sodium hydroxide would alter the enthalpy
1 answer
578 views
Why would you have to subtract the heat capacity of the calorimeter when calculating the heat of the reaction?
0 answers
429 views
Why would you have to subtract the heat capacity of the calorimeter when calculating the heat of the reaction?
0 answers
480 views
all electric field lines start on positive charges. explain why this makes sense.
0 answers
414 views
What is a charge dipole a basic model of?
would it be a magnet?
1 answer
526 views
A beta particle (fast moving electron) is released by a nuclear decay and starts travelling at 1.5x10^6 m/s [NΘE] in the
1 answer
772 views
Two parallel wires are carrying current. If the currents are in the same direction, what is the interaction between the two
1 answer
961 views
1. if the magnetic field is 2.1 m from a current carrying wire is 7.1x10^-5 T, what is the current flowing through the wire?
2.
1 answer
1,394 views
1. You are looking into a current carrying solenoid and notice that the compass needle indicates that you are at the south end
0 answers
597 views
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