huzaifaraza

Thomas had a number of buns to sell. He sold 210 buns in the morning, 106 buns in the afternoon and 2/7 of the remainder in the evening. He was left with 15% of the buns he had at first.

a) What percentage of the total number of buns did he sell in the evening?

b) How many buns did he have at first?

Answer the following question:

1. In your own words, explain why, if two compounds have the same LD50 value, they aren’t necessarily as toxic. Make sure to include the term Threshold in your answer. 

You are an expatriate manager at a manufacturing facility in Asia on your first assignment abroad. You are aware of increasing concern among your employees (mostly young women) about wages that barely permit them to live at a subsistence level.

What is the difference between a desktop computer and a laptop computer?

Many lamps have a switch that lets you choose three levelsofbrightness. The bulbs in this type of lamp have not one buttwofilaments inside, which are wired in parallel and have theirownswitches. One of the filaments is designed to give off morelightthan the other when connected to the average 120 V emfprovidedby a wall outlet. In the dimmest position, only the leastbrightfilament is on. In the next position, only the brighterfilament ison. In the brightest position, both filaments are on.Suppose one ofthe filaments consumes 45.0 watts andthe other consumes 70.0 watts.What is their equivalent resistancein the brightest position (whenboth are turned on)?

1. Which star appears brightness? Which star appears dimmest? Using the brightness equation, how much more light do we receive from the brightest star as composed to the dimmest?

Tell me about James McBride

A jogger jogs two blocks directly north.
(a) How do the jogger's average speed and the magnitude of theaverage velocity compare?
average speed (>,<,=) magnitude of average velocity

(b) If the jogger's return trip follows the same path, how doaverage speed and magnitude of the average velocity compare for thetotal trip?
average speed (>,<,=) magnitude of average velocity

1. What caused the Great Depression?

2. What affect did the Depression have on different groups of people in society? (e.g., the family)

3. How did the Depression affect other countries in the world?

4. How did President Hoover's response to the Depression change over time?

5. Do you think the president is totally responsible for the state of our union? Why or why not? Explain.

Hi everyone,
I'm International Students and I have difficault to understand someproblems in physics. I want to do extra work to be ready forMidtearm.
Please if there is any one can help me by showing me how to solveit.
and if u can show me the steps because I will use it asnotes.

1-What are the metric prefixes for ten and tenth?

2-If you multiplied 7774 m by 36 m, how many significant figuresshould you report in your answer?

3-A ball is dropped:
What is its initial speed?
What is the magnitude of its initial acceleration?


4-A jogger jogs two blocks directly north.
(a) How do the jogger's average speed and the magnitude of theaverage velocity compare?
average speed ( ) magnitude of average velocity
(b) If the jogger's return trip follows the same path, how doaverage speed and magnitude of the average velocity compare for thetotal trip?
average speed ( ) magnitude of average velocity



5-A child's cubic play block has a mass of 115 g and sides of 5.2cm. When placed in a bath tub full of water, will the cube sink orfloat?
(sink) or (float)

6-A ball with a radius of 8 cm and a mass of 550 g is thrown into alake. Will the ball sink or float?
(sink) or (float)

7-Persons A and B do the same job, but B takes longer
Who does the greater amount of work?
person A, person B, Or all the same
Who is more "powerful"?
Person A or Person B

8- Which two renewable energy sources depend on the weather?(Select all that apply.)
geothermal
biomass
tidal
solar
wind

9- The two common liquids used in liquid-in-glass thermometers arealcohol (ethanol) and mercury, which have melting points andboiling points of -114°C, 79°C and -39°C, 357°C,respectively.
Which one of these thermometers would be better for low temperaturemeasurements?
(alcohol or mercury)
Which one of these thermometers would be better for hightemperature measurements?
(alcohol or mercury)

10-What determines the phase of a substance? (Select all thatapply.)
humidity
temperature
amount of the substance
pressure


11-What is the difference between a longitudinal wave and atransverse wave?

Longitudinal wave: particle displacement is (---) parallelperpendicular to wave velocity.
Transverse wave: particle displacement is ( ------) perpendicularparallel to wave velocity.

Give an example of a longitudinal wave.
(sound wave in air OR
light wave)
Give an example of a transverse wave.
(sound wave in air Or
light wave)

12-Which end (blue or red) of the visible spectrum has the shorterwavelength?
Which has the lower frequency?

13- How long does the image of a 18-in ruler appear in a planemirror?
Does this depend on the distance the ruler is from themirror?
(Yes OR
No)

14-What optical phenomenon causes soap bubbles and oil slicks toshow colorful displays?

15- Which two particles that make up atoms have about the samemass? (Select all that apply.)
protons
electrons
neutrons

16- Which two have the same magnitude of electric charge? (Selectall that apply.)
neutrons
electrons
protons

17- Name one phenomenon that can only be explained by light havinga wave nature.
polarization
photoelectric effect
acceleration
displacement

18- How are frequency and wavelength of an electromagnetic waverelated?
higher the frequency, longer the wavelength
higher the frequency, shorter the wavelength
the frequency and wavelength are not direclty related


19- What other name is often used to refer to the electron cloudmodel of the atom?
plum pudding model
billiard ball model
quantum model
nuclear model
planetary model


20- What are the names of the elements with the followingsymbols?
(a) Ne
(b) Li
(c) He

21- After 4 half-lives have gone by, what fraction of a sample of aradioactive isotope remains? (Write your answer in fractionform.)


22- What are the most common names for these compounds andions?
(a) N2O
(b) HCl
(c) C2H3O2 ?
(d) PO43-

23- What is the formula for the common household compound known astable salt? (Type your answer using the format CO2 for CO2.)

24- What element has the lowest electronegativity?
What element has the second highest electronegativity?


Give the Stock system name for the following.
(a) Cr(OH)2
(b) CuCl2
(c) AuBr3

A particles wave function is given as Ψ=A.exp(-a.x.x). Calculatethe normalization constant A, The uncertainties in momentum Δρ,location Δx and their product Δp.Δx. How does it compare withthe minimum uncertainty allowed in quantum mechanics?

can you explain to me the steps that would be used tosolved this?

What is a sensible range for probability, if the quantum numbers given ar nx=1 and ny=2? How does this relate to normalization?

find the value of the normalization constant A for the wavefunctionψ = Axe^-x2/2 .

calculate the value of the constant n in the given radial function when this radial function is normalized. the radial function is defined as follows:

 R(r) = Nr^(2)e ^(-ar)^2  here, n is the normalized constant and a is the positive constant.

compare the melting points of the crude and sublimed samples of caffeine. Account for the differences between the melting points. How do they compare to the literature value?

Weight of tea in 1 tea bag: 4.57g

the weight of 25ml side-arm filter and boiling stones: 27.909g

the weight of caffeine: 27.920g

percent yield: 0.24g

a melting point of the crude caffeine: 232c

Taxol as a complex drug and caffeine as a simple drug.

What are the pros and cons of both when chemically synthesizing the drug?.

What are the types of physical quantities?

What is the definition of "cloud computing"?

Entropy appears to be the only reason we have a forward direction of time.. Energy at lower entropy can do more work than energy at higher entropy.. AN orderly energy is more useful than one that is less orderly. The essential concepts are embodied in Maxwell & S equations.. Einstein thought that if the speed of light was determined by two constants, Mu naught and Epsilon Naught.. These two constants determine the speed. They measure the resistance of space to changing electrical and magnetic fields.. This was one of the postulates of special relativity.. The second postulate was the principle of relativity, meaning the laws of physics are the same for all observes who are moving at the same velocity relative to each other.. There are many equations in quantum mechanics, but in my view. There are three principles that are the most important to remember. These principles are expressed. In three equations. The first idea was championed by Max Planck,, arguably the father of quantum mechanics.. The second idea is expressed by the Heisenberg uncertainty principle.. The third idea is that prior to measurement, quantum systems are in superposed states..

A quantum system can be an elementary particle like an electron or even atoms and molecules that are sufficiently isolated.. Isolated means that they haven&t interacted with something that would cause their wave function to collapse.. THis is the non--deterministic reality that Einstein had a hard time accepting..

Difference between Production and Productivity

Variables --SKIN CANCER

Step 2-: Identify the independent Variable .

Step 3: Identify the dependent Variable and it’s level of measurement.

Step 4: Map out your proposed hypothesis.

Step 5: Describe the hypothesis. What do you expect? Why do you want to study it?

Identify and explain in detail with references, the leadership styles that can influence compliance of health and safety standards in the mining industry