# 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 -10C from 1 kg of water at 20C when 20C 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.