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

25,359 results, page 95

chemistry

If the temperatures of separate 34 g samples of gold, mercury, and carbon are to be raised by 10.0°C. How much heat must be applied to each substance?

chemistry

What is the total number of valence electrons that must be shown in the Lewis structure for magnesium fluoride I think 16 but im not sure

physics

If an armadillo can leap to 0.5m height, how fast must he be moving vertically when his feet just lift off the pavement?

math

How much money must I start out with if I want to end up with 20,000 over 5 years with and intrest rate of 5% a year.

physics

How fast must a cetrifuge rotate in order for a particle 9cm from the axis of rotation to experience an acceleration of 115000g's

chem

what temperature must be maintained in insure that a 1.00 L flask containing 0.04 moles of oxygen will show a continuous pressure of 745 mm Hg?

Chemistry

What mass of octane must be burned in order to liberate 5510 kJ of heat? ΔHcomb = -5471 kJ/mol.

chemistry

how many grams of hydrogen peroxide (H2O2) must be added to 1500 ml of water to produce a concentration of 1.33 m (molal solution)

Chemistry

How many moles of HCl must be added to 100mL of a 0.100 M solution of methylamine (pKb=3.36) to give a buffer having a pH of 10.0?

physics

What must be the radius of a 4 kg circular disk if it is to have the same moment of inertia as a 1 kg rod 1 M long and pivoted at its midpoint?

Algebra 2

Whar number must be added to both sides of the equation to solve it by completeing the square? 3x^2+15x=9 (1)225 (2)25 (3)6.25 (4)5

Chemistry

At what speed must an electron travel to have a wavelength of 13.6 pm? I got 9.89x10^-15 as the answer and its wrong where did I mess up in my calculations?

computers in day care

a method in which children must see and touch objects in order to learn about them is called

Physics

How much heat must be transferred to each kilogram of aluminum to bring it to its melting point, 660°C, from room temperature, 20°C?

physics

How fast must a 3000 lb car be traveling to hit a 4000 lb minivan on the side rear to spin it 180°

organic chemistry

Why must the alkyl halide product be dried carefully with anhydrous calcium chloride before the distillation?

Chem

What weight of sample containing 8.00 % Fe3O4 must be taken to obtain a precipitate of Fe(OH)3 that, when ignited to Fe2O3, weighs 150 mg?

physics

5. An object that has kinetic energy must have ____________________. A) momentum. B) acceleration. C) a force applied to it. D) All of these. E) None of these.

Chemistry

how many grams of sodium acetate must be added to 135 mL of a .115M solution of acetic acid to produce a buffer of pH 4.75?

physics

Where must an object be placed to have a magnification of 3.74 in front of a converging lens of focal length 14.1 cm?

English

Please correct the errors, im not sure on this one. The scouts or their mascot must do their best to clean up the mess at the campgrounds.

sciences

i want to become amember of young scientist association in my school. But for this i must give an idea of any science project . Please help me

help

10. "Thomas Jefferson owned slaves, so slavery must have been a good idea" may commit which fallacy? (Points : 1)

Chemistry

To what temperature must a gas sample initally at 13 degrees be raised in order for the avarage energy of its molecules to double?

Chemistry

In procent how much etanol with 10% metanol in water to mix because i must calculate to have liquid freeze to -20C?

chemistry

calculate the mass of potassium hydrogen phthalate which must be dissolved in water to make 500ml of a 0.2000M solution

Physics

A spring has a a constant of 650 N/m. How far must it be compressed to push a 4kg object on a friction-less surface to 3 m/s?

Science

A spring has a force constant of 50000 N/m. How far must it be stretched for its poten- tial energy to be 22 J? Answer in units of m

math

how much money must you deposit into an account that earns 3% monthly to have $1000 after 4 years

geometry

The circle x^2 y^2 2gx 2fy c=0 passes through the points A(-1,-2),B(1,2)and C(2,3). Write down three equation which must satisfied g,f,c.

chemistry

If Kf = 1.86C/m, how many grams of calcium chloride must be added to 1.0L of water (assume a density of 1.0 g/mL) to lower the freezing point 4.0 C?

maths

If G is a group of order 12, the G must have a subgroup of all of the following orders EXCEPT Choose one answer. a. 0 b. 12 c. 2 d. 3 e. 6 f. 4

math

If I need $25,000 in 4 years. Waht amount must i invest today if the investment earns 12% compounded semiannualy?

Psychology

Information which comes to a neuron must arrive through its: A. axons. B. glial cells. C. prefrontal area. D. dendrites.

Chemistry

How much water must be added to 6 mL of a 0.05M stock solution to diltue it to 0.02M ? The answerI got is 15 mL. Is this correct? Thanks

chemistry

How many grams of ethylene glycol must be added to 37.8g of water to give a freezing point of -0.150 degrees Celsius

Physical Science

6. In order to turn 2 iron atoms into rust, 2 water molecules must be present. -False?

Chemistry

What must we know a given ionic salt to be able to predict whether is is a good or poor conductor, w/o testing its conductivity?

Physics

At what speed must a 950 kg subcompact car be moving to have the same kinetic energy as a 3.2*10^4 kg truck going 20 km/h ?

chemistry

How many grams of hydrogen peroxide (H2O2) must be added to 1,500 mL of water to produce a concentration of 1.33 m (molal solution)?

physics

A football is thrown upward at a 30 degree angle to the horizontal. To throw a 40.0-m pass, what must be the initial speed of the ball?

Social Studies

What was Alexander Hamilton’s main reason for insisting that all the nation’s debts must be paid in full?

english

on my first baby-sitting job ,I found that one must have____patience to take care of young children

Math

How much must be invested to have 25,000.00 after 5 years in an account drawing 7% interest compounded continuously?

Statistics

True or False In order for the distribution of sample means to be normal, it must be based on samples of at least n = 30 scores.

Science

To what temperature must a given mass of Nitrogen at zero degree celsius be heated to double its volume and pressure?

chemistry

How much 6.0M NaoH must be added to 0.5L of a buffer that is 0.0200M acetic acid and 0.0250M sodium acetate to raise the PH to 5.75

math

which figure must have both parallel and perpendicular sides. 1.parallelogram 2. rectangle 3. rhombus 4. right triangles

Calc Help

Find the most general antiderivative of f(x)=–8e^x–6secant^2(x), where -pi/2<x<pi/2 Note: Any arbitrary constants used must be an upper-case "C" F(x)=?

Chemistry

what is the mass of nh4cl that must dissolve in 100. grams of h2o to produce a saturated solution at 70 degrees celsius

Chemistry

How much ethylene glycol (C2H6O2, the major component of antifreeze) must be added to 1 L of water to keep from it freezing at -15 °F?

Chemistry

How much water must be added to 963 g of solid sodium hydroxide needed in order to prepare a 1.50 M solution?

math

Geeta bought eggs at Rs 8.40 a dozen. At what price per hundred must she sell them so as to earn a profit of 15 percent?

P.E

in order to make healthy choice, you must learn to_________risks. A. ignore B. advocate for C. evaluate D. take more. i think its B

P.E

in order to make healthy choice, you must learn to_________risks. A. ignore B. advocate for C. evaluate D. take more. i think A

Easy Chemistry

How long (in minutes) must a 5.40 A current be passed through an aqueous solution of zinc nitrate to deposit 87.5 g Zn?

thermodynamics

an automobile having a mass of 1.250 kg is traveling at 40m/s. what is its energy in kJ? how much work must be done to bring it to a stop?

science

a pipe that carries 10 gpm of liquid at 50 psi with at least 0.5 sq in area must fit through a hole that's 1.25 in in diameter.

Chemistry

How much ethylene glycol (C2H6O2, the major component of antifreeze) must be added to 1 L of water to keep it from freezing at -20 oC? Kf = 1.86 oC/m.

Chemistry

What precautions must be taken when you introduce a mixture of compounds to be separated onto a liquid chromatography adsorbent column?

Chemistry

What precautions must be taken when you introduce a mixture of compounds to be separated onto a liquid chromatography adsorbent column?

Anatomy

What type of organism must use the cell's energy and parts to multiply? A. Protozoa B. Fungi C. Bacteria D. Virus

pre- calculus

In how many ways can a family of six be seated at a round table if the mother and father must sit together?

Math

write an inequality representing the depth d of the water that must be greaeter than 80degrees farenheit in order for a hurricane to form

Math

If a wheel turns 9 revolutions per minute and its circumference is 3.77 what speed must a mouse run to stay on top

Math

A wheel turns 9times per minute its diameter is1.2 at what speed must I run to stay on top

chemistry

What mass of ammonium chloride must be added to a 0.500 L solution of 0.250 M ammonia to make a buffer with a pH of 9.26? Kb (NH3) = 1.8 × 10–5?

chemistry help

What mass of ammonium chloride must be added to a 0.500 L solution of 0.250 M ammonia to make a buffer with a pH of 9.26? Kb (NH3) = 1.8 × 10–5?

Ap European

In what respect must each of the following share in the war guilt? Austria,Serbia,Russia,France,Britain,Germany

chemistry

what part of the meniscus must be read to accurately record the volume of a liquid in a graduated cylinder??? the lowest of the bubble?

physics help

how much work must be done to raise a 5kg block of steel from the ground to a height of 2m (in Joules) in the absence of friction?

math

If a line whose x- and y- intercepts are equal does not pass through the origin, then its slope must be A. 0 B. 1 C. -1 D. undefined I'm thinking it's 0, I don't know though.

math

If a line whose x- and y- intercepts are equal does not pass through the origin, then its slope must be A. 0 B. 1 C. -1 D. undefined I'm thinking it's 0, I don't know though.

mpole high school

Businesses processes community must engage whenever there is an issue before and during the protest

physics

what minimum initial velocity must aprojectile have to reach atarget at a distance of 25m away? (g: 10m/s)

electron theory and ohms law

what voltage must be applied to a 6.4-ohm lamp filament to develop 20 amperes of current?

Math Help

2x^4-3x^2-7x+1=0 Estimate what the real solution will be using Newton's method. Answers must be 4 decimal places. Let the first guess be x=1.75

math help

2x^4-3x^2-7x+1=0 Estimate what the real solution will be using Newton's method. Answers must be 4 decimal places. Let the first guess be x=1.75

Social studies

Which type of commitee must be formed if the House and Senate pass different versions of the same bill?

Algebra

your are building a soccer field. the length has to be 30 m longer than the width, and the total perimeter must be between 320i m and 360 m.

chemistry

For CaCrO4, Ksp= 7.1x 10^-4. How many grams of Na2CrO4 must be added to 200 mL of .250 M Ca(NO3)2 to just initiate precipitation?

Chemistry

Calculate the total amount of heat that must be added to convert 15.7g of ice at its melting point to steam at 100.0°C

chemistry

to what temperature must a given mass of nitrogen at zero degree be heated so that both it volume and pressure will be doubled

Calculus

Design an Advanced U substitution problem whose answer must be exactly 6 and can be solved without using calculator?

math

Joan is going on a bike trip. She plans to ride 9 miles in 45 minutes. At what rate mi/min must she travel?

Chemistry

How many grams of hydrogen peroxide (H2O2) must be added to 1,500 ml of water to produce a concentration of 1.33 m (molal solution)?

Math

In a coordinate plane points (2,4) and (3, -1) are on a line.Which of the following must be true? A.)The two are intersecting B.)They are all above the x axis

MATH

How many license plates are possible consisting of 4 letters followed by 2 digits, if the first letter must be a C? Repetition is allowed.

chemistry

What mass of glycerin (), a nonelectrolyte, must be dissolved in 200.0 g water to give a solution with a freezing point of –0.900°C?

Statistics

A cooperation must appoint a president, CEO, coo, CFO. There are 15 qualified candidates. How many ways can the officers be appointed?

calculus

find the location and values of any global extrema of F(x)= x^3-3x^2-9x on the interval [-2,4] (you must show your work by finding critical points

physics

How much work must an ideal refrigerator perform to make 1 kg of ice at -10C from 1 kg of water at 20C when 20C is also its exhaust temperature?

Chemistry

How many grams of KI must be added to a 250-ml volumetric flask to prepare a water solution that is 0.100 M in potassium iodide?

Physics 2

How many grams of steam at 100C must be mixed with 200g of water at 20C in order for the equilibrium temperature to be 50C?

Math

The 3rd and 7th terms of an A.P are -1 and 11 respectively. Fine the nth term and the numbers of which must be added to get a sum of 430

math

it cost 660 to put on the school play. how many tickets must be sold at 6 piece in order to make a profit?

Algebra and Geometry

Can someone xplain what the golden ratio is and how we know that it MUST be irrational. What does this tell us about our Penrose tilings?

Chemistry (Gas)

A cylinder is filled with 120L of air at 101 kPa and 20*C. How long could the cylinder be used "just underwater" on earth assuming 2L is used every 5 seconds. I don't understand what the pressure and temperature would be "just underwater." Is it assumed that it is SATP?

Science

Explain the law of motion needed to solve this problem and then solve it. On Planet Zorg, a 30 kg barbell can be lifted by only exerting a force of 180 N. What is the acceleration of gravity on Planet Zorg? Predict how the motion of this object would change if on Earth.

Preschool Question--Pleae Help!

I asked this question a few days ago- and several tutors said there is no one correct answer. There has to be one answer better,because I can only mark one answer. For many children,the development of their imagination affects the development of: A. empathy B. literacy C. ...

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