Why must the centre of the satellite orbit coincide with the centre of the Earth?

24,970 results, page 89

Chemistry

What mass of NaOH(s) must be added to 300 mL of HCl 0.25 M in order to completely neutralize this acid?

Physics

How many Joules of thermal energy must be added to 5 kg of water at 20 C to bring it to the boiling point (at 100 C)?

Chemistry

What mass of KClO3 must be decomposed to KCl and O2 to give 638ml O2 at 18 degrees Celcius and 752torr?

thermochemistry

what is the formula to find the mass of propane that must be combusted to produce 188.3kj of energy?

organic chemisrtry

What must a molecule possess to be able to absorb radiation in the infra-red region?

chemistry

What mass of sucrose must be taken for solution weight of 200 g, which is equal to molality 0.05 mol / kg?

chemstry

What mass of sucrose must be taken for solution weight of 200 g, which is equal to molality 0.05 mol / kg?

science

How much sugar must be added to 50g of water to make a saturated solution at 0 degrees?!

Chem 2

What mass of water must be used to make a 1.35m solution that contains 8.20 moles NaOH?

Math

Use the method of elimination to solve the following system of equations. You must check your answer: 1)x/2 + y/5 = 1/2 2) 3x - y = -8

chemistry

You have 37.0 mL of a 3.00 M stock solution that must be diluted to 0.500 M. How much water should you add?

General Chemistry

How many milliliters of 0.5M NaOH must be added to 200 mL of 0.1M NaH2PO4 to make a buffer solution with a pH of 6.9?

Chemistry

you have 57.0 mL of a 2.00 M stock solution that must be diluted to 0.500 M. how much water should you add?

Chemistry

you have 57.0 mL of a 2.00 M stock solution that must be diluted to 0.500 M. how much water should you add?

Chemistry

you have 57.0 mL of a 2.00 M stock solution that must be diluted to 0.500 M. how much water should you add?

Chemistry

you have 57.0 mL of a 2.00 M stock solution that must be diluted to 0.500 M. how much water should you add?

Chemistry

you have 57.0 mL of a 2.00 M stock solution that must be diluted to 0.500 M. how much water should you add?

math 205

How much must be invested today at 8% compounded quarterly to have 3500 in 4 years?

Chemistry

How many milliliters of 1.0 M NaOH must be added to 200. mL of 0.10 M NaH2PO4 to make a buffer solution with a pH of 7.50? (5 points)

Child day care management

To determine liability one must figure out who is legally

science

must all tpopgraphic maps have a contour line that represents 0m of elevation explain

Chemistry

How many grams of K2Cr2O7 (Potassium dichromate) must be used to make 250 ml of a0.125 M solution?

physics

list three factors that we must always give when exprassing a force vector quantity

Geometry

Find the length of the side A’B’ for the congruent triangle. C = 28 degrees A = 14 Must show work with answer.

Gen.Chem2

what mass(g) of NH3 must be dissolved in 475g of methanol to make a 0.25m solution

calculus help

explain fully what trick you must use in order to us L'Hospital's rule for indeterminate powers?

Chemistry

How many grams of lithium fluoride must be added to 3.5 kg of water to make a solution with a molality of 2.0 molal?

medical coding

To fully eliminate all infectious microorganisms, which of the following measures must be used?

chemistry

What mass of cesium chloride must be added to 0.570 L water to produce a 0.375 m solution?

math

Find the number of arrangements of the letters of the word STRENGTH if the order of the consonants must not be changed?

history business studies tourism maths literacy

Plz guyz any one who can help me there what career must I do

math

How many possible license plates can be made with 4 letters followed by 4 numbers and must start with the letter C

Physics, Help!! URGENT!!!

A sprinter must average 24.0 mi/h to win a 100-m dash in 9.30 s. What is his wavelength at this speed if his mass is 84.5 kg?

chemistry

if you have 125.0g of water at 100.0, how much energy must be added to vaporize all of it

Math 112

On your first two exams, your grades are 86% and 88% x=86 and y=88 What must you get on the third exam to have an average of 90%?

Chemistry

2NaN(3) > 2 Na +3N(2) What mass of sodium azide must be reacted to inflate and air bag to 70.0 L at STP?

Chemistry

What volume of 0.170 M K3PO4(aq) must be added to 50.3 mL of 0.103 M K2HPO4(aq) to prepare a buffer solution with a pH of 12.09?

Chemistry

How much work must be done on a system to decrease its volume from 14.0 L to 5.0 L by exerting a constant pressure of 4.0 atm?

Science

In addition to Carbon and Hydrogen, which elements must be available to form a DNA nucleotide monomer?

physics

with what velocity must a ball be thrown in order to achieve the height of 50 ft.? and how long will it stay in the air?

AP Chemistry

To have a buffer with a pH of 2.50, what volume of 0.510 M NaOH must be added to 100. mL of 0.230M H3PO4?

life oriantation

process that the community must engage whenever there is an issue before and during a protest

math

Bruce scored a 12, 18, 16, and 17 on his four quizzes. What must his score on the fifth quiz be if he wants an overall average of 16.

tourism.geography.maths lit.history

what career must i follow because im in grade 12 now.help me plz

Chemistry

how many grams of butane must be burned in an excess of o2 gas in order to produce 7.64l of co2?

english grammar

jimmy you must leave the room shut the door and be quiet. what is the correct punctuatuion

science: chemistry

How many moles of NaOH must be added to 1.0 L of 2.6 M HC3H5O3 to produce a solution buffered at each pH? 1)pH= 4.28 2)pH=pKa

Physics

From what height must water fall from a dam to strike the margine waves w/ a speed 30m/s.

Chemistry

How many grams of iron must be oxidized to produce 5.0g of rust? (Fe2O3) I have no idea how to solve this!

chem 11

to compress nitrogen at 1 atm from ml to 500 ml, what must the new pressure be if the temperature is kept constant?

grammar

Gardeners must thanks worms and bees for beautiful flowers. What would be the direct objects in this sentence?

math

FIND THE LEAST NUMBER BY WHICH 21168 MUST BE DIVIDED IN ORDER TO YIELD A PERFECT SQUARE ?

chemistry

how many grams of NaCl should be added in 15ml which must have a final concentration of 10mM

Math

Which of the following statements must always be true of two similar non congruent triangle?

Physics

How fast must a plane fly at a latitude of 41.9° so that the sun stands still relative to the passengers?

maths lit,B.S,consumer studies,CAT,english,LO

Which degree must I study or which carreer can I follow

Chemistry

What is the total mass of KNO3 that must be dissolved in 50 g of water at 60 degree C to make a saturated solution?

Chemistry

Determine how many grams of Al must react with 2.5 M NaOH in order to produce 40 mL of hydrogen gas at 22°C and 1.02 bar

quimica

In assessing 20.0ml of NaOH 0.175M , calculate how many ml of 0.200M HCl must be added to obtain a pH of 12.55

math

True or False: The median must always be one of the numbers in the data set itself.

Chemistry

The volume of 18 molar concentrated H2SO4 that must be diluted with distilled water to prepare 10 liters

chemistry

Calculate the amount of water (in grams) that must be added to 5.00 g urea in preparation of 16.2% by mass solution.

chemistry

Calculate the amount of water (in grams) that must be added to 5.00 g urea in preparation of 16.2% by mass solution.

Physics

how many coulombs must be on one object for it to be repelled with a force of 6.0 N by a second charge of 2.0uC at a distance of 1.0 m?

Math

2 liters of cleaning solution is 65% ammonia. How much water must be added to dilute it to a 40% soulition?

Math

The first term of a GP is 64 and the common ratio is 1/2.How many terms must be added to obtain a total of 127 1/2?

english

Identify the subject, object, and verb in this sentence: Paralegals must have good ethics.

chem 1211

What temperature change must 1.2mol of water undergo if the amount of energy changed is 23.7 J?

Chemistry

At what speed must a human weighing 150.0 lb be traveling in order to have a wavelength at 650 nm?

proportion and percentages problem

what must be added to 311 to make it equal to 87 1/2 per cent of 500

Math

A sixth number will be added to the list. What must it be in order for the mean to be 12? (Use algebraic equation to help)

Introduction to small engines

The distance the piston must travel from TDC to BDC is referred to as the of the engine

GEOGRAPHY

ON A JOURNEY FROM NEWYORK TO LAGOS, TO CORRECT STANDARD TIME YOU MUST PUT THE HAND OF YOUR WATCH ......................

Spelling

Mother is to brother as fly is to? 4 letters. Must contain scr, spr, str, or thr.

Chemistry

If you add 13.75 mL of 1.35 M HCl to 22.80 mL of 0.955 M Ca(OH)2, will you neutralize all the Ca(OH)2? You must show data to support your answer.

PHYSICS!!

Two basketball players collide head on. play a weighs 80 kg and is travelling 2.5m/s to the right while player b weighs 68 kg and is travelling 1.2 m/s to the left. after collision player a is travelling at 1.0 m/s to the right. a. what is the change in momentum of player a? b...

Chemistry

How many grams of propane must be burned to provide the heat needed to melt a 70.0-g piece of ice...? How many grams of propane must be burned to provide the heat needed to melt a 70.0-g piece of ice (at its melting point) and bring the resulting water to a boil (with no ...

Science

1. Under which of the following conditions would a fossil most likely form? A. A living thing dies and sediment is very slowly deposited on top of its body. B. A living thing dies and sediment quickly covers its body. C. A living thing dies and its skeleton is left exposed to ...

Physics

a ship is headed towards east at a thrust speed of 7.00 knots. A strong wind pressure causes the ship to deviate to the north at 1.00 knots. The sea current is flowing to the southwest at 4.00 knots. Determine the velocity of the ship relative to the earth's surface.

physics

A fisherman sets out upstream from Metaline Falls on the Pend Oreille River in northwestern Washington State. His small boat, powered by an outboard motor, travels at a constant speed v in still water. The water flows at a lower constant speed vw. He has traveled upstream for ...

physics

A fisherman sets out upstream from Metaline Falls on the Pend Oreille River in northwestern Washington State. His small boat, powered by an outboard motor, travels at a constant speed v in still water. The water flows at a lower constant speed vw. He has traveled upstream for ...

Earth science

a fault is observed in a road cut, but there is no obvious rock units to correlate on either side of the fault to determine relative movement. How might you determine or even infer whether the hanging wall has moved up or down relative to the footwall

6th grade science

1. earth has only a limited amount of land, yet land is a renewable resource, why? 2. trees are renewable resources, but some forests are not, why? 3. compare and contrast minerals and ores. 4. how could using ores contribute to an increase in air pollution?

Science

Help with these questions. 1. Describe a disadvantage of using a telescope positioned in space. 2. What advantage is there to doing laboratory experiments on the International Space Station rather than doing the same experiments on Earth? 3. Explain why it is unlikely that ...

Science

An area in your state has been flooded due to heavy rains. How might scientists from the three main branches of science interact in their study of the flood, its effects, and how future flooding might be controlled? Life science, Earth science, and physical scicence.

physics

the first active volcano observed outside the earth was discovered in 1979 on Io, one of the moons of jupiter. the volcano was observed to be ejecting material to a height of about 2.00x10^5m. given that the acceleration of gravity on Io is 1.80 m/s^2, find the initial ...

physical science

On the surface of the moon, where the acceleration due to gravity is about one-sixth that of Earth, a 100-kg astronaut would have a mass of_____ and a weight of _____ A. 100kg, 1000N B. 16.6kg, 166N C. 100kg, 166N D. 600kg, 1000N

physics

Two pellets, each with a charge of 0.80 microcoulomb (8.0×10−7 C), are located 4.0 cm (4.0×10−2 m) apart. Find the electric force between them, which I solved for 3.6 N. I am stuck on the next part: What would be the mass of an object that would experience this ...

Physics

Two different simple harmonic oscillators have the same natural frequency (f=5.60 Hz) when they are on the surface of the Earth. The first oscillator is a pendulum, the second is a vertical spring and mass. If both systems are moved to the surface of the moon (g=1.67 m/s2), ...

calculus 2

An object falls off a 400-foot tower. With g=32ft/sec^2, as at the Earth’s surface, the object would hit the ground after 5 seconds. What would the acceleration due to gravity have to be to make it reach the ground in half the time?

Science

1. Where is the Earth's equator located today? Describe the climatic conditions. 2. Compare and contrast the climatic conditions existed during this time today. 3. Answer: What types of fossils would you expect to find here? Explain why based on the animals' characteristics.

Social Studies

Which of the fallowing is not true about Aborigine culture? a. It is the oldest surviving culture on Earth*** b. Tradition Aborigine societies found agricultural settlements c. Aborigine do not believe that land belongs to humans d. Aborigine groups are spread across the ...

Geometry

A sailboat is heading directly north at a speed of 16 knots (1 knot = 0.514 m/s). The wind is blowing towards the east with a speed of 10.4 knots. (Both velocities are given relative to the Earth.) Determine the magnitude and direction of the wind velocity as measured on the ...

economics

6) If average movie ticket prices rise by about 5 percent and attendance falls by about 2 percent, other things being equal, the elasticity of demand for movie tickets is about: A. 0.0 B. 0.4 C. 0.6 D. 2.5 7) When labor is the variable input, the average product equals the A. ...

Physics

My last problem for the day: A) The centers of two 11.00 kg spheres are separated by 0.09 m. What is their gravitational attraction? I got 9.96 x 10^-7 N. B) What is the ratio of this attraction to the weight of one of the spheres (at the surface of the Earth)? I'm sure this ...

Geology/Earth Science

1. In what climate and on what rock type would you expect a)Karst formation b)Crystal growth; to occur? 2. Explain the process by which potholes in a road get bigger. 3. Why in central Ontario, does the south and southwest side of a building weather faster compared to the ...

space

Consider a situation where immediately after birth, twins are separated. One continues to live on earth, while the other is whisked away in a space ship at 90% of the speed of light. After 65 years they are reunited. Will they look the same? Show proof of your answer through ...

Chem

The atomic numbers and masses must added up on both sides of the equation just as we must have the same number of atoms on each side of an equation when it is balanced. Ejection of a "thing" with 2 protons and 2 nuetrons is a He nucleus which is an alpha particle. 88Ra226 ==&...

Language arts

1. Read the sentence from "Zoos: Joys or Jails?" What clue word is used to show contrast between the two points of view? "Although the circumstances and reasons for animals being in zoos vary, its concept has faults many don't notice during their visit with the animals." and ...

Writing Evaluation (Writeacher)

Should I revise anything? In my opinion, the use of “scary things” as entertainment is redundant. I mean, honestly, what on earth is so enjoyable about fear? Fear is what haunts us and frightened us even as young children. Yes, we are taught to face it, to not fear it, but...

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