# how much heat is required to melt an ice cube that is 4.2 cm x 2.1 cm x 2.9 cm? The density of ice is 0.92 g/cm3

22,259 questions, page 72
1. ## chemistry12_2016-1

In one process, 4.0 grams of sulphur was brunt in 48.0 decimeter cube of oxygen measured at RTP. (A) What is the limiting reactant in this reaction? (B) Calculate the volume of sulphur dioxide formed at RTP.

asked by Anonymous666_4 on March 27, 2016
2. ## Algebra 2

The amount of time required to stack boxes varies directly with the number of boxes inversely with the number of people who are stacking them. If 2 people can stack 60 boxes in 10 minutes, how many minutes will be required for 6 people to stack 120 boxes?

asked by Dee on January 18, 2017
3. ## Physics

Which needs more energy: to heat 5 kg of copper from 20 degrees celcius to 50 degrees celcius or to heat 0.5 kg of water from 20 degrees celcius to 50 degrees celcius?

asked by Ann on November 22, 2015
4. ## Physic II

Heat can be transformed into work with 100% efficiency , but work cannot be transformed into heat with 100% efficiency. False right?

asked by rujiye on April 30, 2014
5. ## Physics

A freezer has a coefficient of performance of 6.30. It is advertised as using 486 kWh/yr. Note: One kilowatt-hour (kWh) is an amount of energy equal to running a 1-kW appliance for one hour. a) On average, how much energy does it use in a single day? I got

asked by Z32 on February 16, 2011
6. ## western michigan university

A 30 gram metal at 100 degrees Celsius was dropped into 132 grams of water at 25 degrees Celsius and the final temperature for the metal in water system was 29 degrees Celsius. Calculate the specific heat capacity of the metal if the specific heat capacity

asked by lorena on December 6, 2012
7. ## Physics

Coefficient of volume expansion of some liquids(a/˚C) Alcohol=1.1x〖10〗^(-4) Glycerin=5.0x〖10〗^(-4) Water=3.7x〖10〗^(-4) Ether=1.63x〖10〗^(-4) Mercury= 1.1x〖10〗^(-4) How much water overflows when a pyrex vessel filled to the grim with 1

asked by Angela on December 8, 2013
8. ## maths

prove that : 3^-3 * 6^2 * root 98 divided by 5 ^2 * cube root 1/25 * 15 ^-4/3 * 3^1/3 equals to 28 root 2

asked by tuhituhi on March 30, 2013
9. ## math

You roll a number cube numbered from 1 to 6. P(a prime number) I think 3/6 or 1/2 P(not a 6) 5/6 P (an even number) 3/6 or 1/2 P (3,6,5,2, or 4) = 5/6

asked by Anonymous on March 13, 2014
10. ## math

The product of square of a number and the cube of the same number is equal to 32 what is that number

asked by Felicia motaung on April 8, 2014
11. ## math

Solve for x: [Sixth root of 27]+[cube root of x] = 6/(3-[square root of 3]

asked by Sidney on February 14, 2011
12. ## MATH

You roll a number cube numbered from 1 to 6. P(a prime number) I think 3/6 or 1/2 P(not a 6) 5/6 P (an even number) 3/6 or 1/2 P (3,6,5,2, or 4) = 5/6

asked by Anonymous on March 13, 2014
13. ## Physics

In a phsics experiment, a 1.3 kg dynamics cart is placed on a ramp inclined at 25 degrees to the horizontal. the cart is initially at rest but is then pulled up the ramp with a force sensor. the force sensor exerts a force on the cart parallel to the ramp.

asked by Lola on October 1, 2013
14. ## Physics

In a phsics experiment, a 1.3 kg dynamics cart is placed on a ramp inclined at 25 degrees to the horizontal. the cart is initially at rest but is then pulled up the ramp with a force sensor. the force sensor exerts a force on the cart parallel to the ramp.

asked by Lola on October 1, 2013
15. ## Physics

A stick of dynamite (190 g) contains roughly 10 J of chemical energy that is transformed into mechanical energy and heat during an explosion. A 1000 kg rock in outer space is at rest with respect to a spaceship. An astronaut blows up the rock with one

16. ## Science

I want to make a small model of how electricity is created by burning coal. I want to show a model that works and be able to light up and very small light bulb(the ones found in an average school microscope). How would I do this. You will find this

asked by Gina on December 18, 2006
17. ## Physics

A stick of dynamite (190 g) contains roughly 10 J of chemical energy that is transformed into mechanical energy and heat during an explosion. A 1000 kg rock in outer space is at rest with respect to a spaceship. An astronaut blows up the rock with one

18. ## PHYSICS NEED HELP FAST

A 150KG STEEL ROD IN A BUILDING UNDER CONSTRUCTION SUPPORTS A LOAD OF 6050KG. DURING THE DSY THE RODS TEMP. INCREASES FROM 22C TO 47C CAUSING THE ROD TO THERMAALLY EXPAND AND RAISE THE LOAD 5.5mm. FIND THE EGERHU TRANSFER AS HEAT TO OR FROM THE ROD. THE

asked by ricki on March 2, 2011
19. ## math

which of the following expressions shows the equation to use in the finding the dimensions of a cube N by N by N with a volume 125 1) n3=125 2) n2=125 3) 3n=125 4) n=125/3 5) not enought info given need help with this problem!!

asked by Angel on August 24, 2010
20. ## Chemistry 101

If 12.0g of molecular oxygen, O2, is required to inflate a balloon to a certain size at 27 degree celcius, what mass of molecular oxygen required to inflate it to the same size and pressure at 81 degree celcius?

asked by Eunice on April 30, 2009
21. ## Chemistry

If the same solute is dissolved in two different solvents to the same concentration and the same temperature, the osmotic pressure ____ My answer & reason: solution A has a smaller molecular weight and therefore, a larger Molarity and higher osmotic

asked by Anonymous on February 25, 2009
22. ## World History (Ms. Sue)

I'm only guessing. I don't have much of an idea. What fears do we have today that prevent or inhibit exploration or research? What technological advance would be required to overcome those fears? A: Fears of failure, disease, and losing resources are that

asked by Victoria on October 21, 2014
23. ## physics

A system undergoes a two-step process. In the first step, the internal energy of the system increases by 368 J when 144 J of work is done on the system. In the second step, the internal energy of the system increases by 24 J when 248 J of work is done on

asked by Will on April 26, 2008
24. ## Chemistry

One reaction of iron with hydrochloric acid is represented by the following thermochemical equation. Fe(s) + 2HCl(aq) ? FeCl2(aq) + H2(g); (Delta)H°= –87.9 kJ How much heat is liberated at constant pressure if 0.215 g of iron reacts with 40.4 mL of

asked by Raul on March 24, 2013
25. ## math

side of the cube increasing at rate of 6 cm/s. find the rate of increase of the volume when the length of a side is 9 cm.[ans 1458cm^3/s] my answer: ~729x6=4374cm^3/s i need some1 show me the calculation if im wrong.

asked by susan on July 22, 2011
26. ## physic

What mass of water at 22.0 °C must be allowed to come to thermal equilibrium with a 1.66-kg cube of aluminum initially at 1.50 multiplied by 102 °C to lower the temperature of the aluminum to 57.1 °C? Assume any water turned to stream subsequently

asked by baby on May 20, 2011
27. ## Math

Dree rolls a strike in 6 out of the 10 frames in bowling. What is the experimental probability that Dree will roll a strike in the first frame of the next game? Explain why a number cube would not be a good way to simulate this situation. I am confused on

asked by Patrick on March 29, 2018
28. ## Chemistry

Perform this operation and report the answer to the correct number of significant figures: What is the mass of a cube of aluminum that is 4.0 cm on each edge? The density of aluminum is 2.7 g/cm3. Show all calculations leading to an answer.

asked by Kylie on May 24, 2018
29. ## math

The stiffness of a given length of beam is proportional to the product of the width and the cube of the depth. Find the shape of the stiffest beam which can be cut from a cylindrical log (of the given length) with cross-sectional diameter of D

asked by manjeet on April 7, 2018
30. ## math

Adam has built a garden shed in the shape described. a square based pyramid with the height of 3.5m on top of a cube with base 4m by 4m and height 2m. calculate the volume of the shed, to the nearest cubic metre. thanks.

asked by Ted on May 16, 2010
31. ## chemistry

What is the total energy change if 150.0 grams of ice at 0.0 oC are melted, then the water is warmed to 45.0 oC? Is this process endothermic or exothermic? ƒ´Hf = 6.01 kJ/mol(multiple steps)

asked by evelyn on March 6, 2014
32. ## Physics

0.115 kg of water at 89.0o C is poured into an insulated cup containing 0.226 kg of ice initally at 0o. Calculate the mass of liquid when the system reaches thermal equilibrium.

asked by Jake on February 7, 2019
33. ## Physics

A container of mass 0.3 kg slides along the ice with a speed of 4 m/s when it reaches a rough section where the coefficient of kinetic friction is 0.8. How long will it take the puck to stop sliding?

asked by Shawn on September 30, 2016
34. ## Physics

A 1 kg hockey puck is sliding on the ice at 5m/s and stops on some dirt in 2 secs. I need to find the coefficient of kinetic friction. I found the acceleration being -2.5m/s^s (0-5m/s / 2s) Idk what to do next pleaseeee help

asked by Lola on June 1, 2014
35. ## math

We know that 65% of all Americans prefer chocolate over vanilla ice cream. Suppose that 1000 people were randomly selected. The Sampling Distribution of the sample proportion is

asked by Estimation on December 17, 2016
36. ## Oxymorons

I need a list of oxymorons and I searched google; Can someone let me know which ones I am missing? Here's what I have so far: civil war diet ice cream living dead butthead old news same difference Thanks!

asked by mTaq14 on March 17, 2009
37. ## Check Puctuation

The rainbow streched across the sky from the ice cream truck to the house down the land Isn't that last word "lane"? All it needs are the spelling correction and a period at the end, nothing else. =)

asked by Lynne on July 6, 2007
38. ## English

Hello! What could I do as a lead in activity with two 5th graders? We have a 45 minute lesson tomorrow and I want to break the ice with a funny game. The topic is not important. Does anyone have something that lasts for 10 minutes?

asked by tee on January 27, 2011
39. ## PHYSICS!

0.115 kg of water at 81.0o C is poured into an insulated cup containing 0.220 kg of ice initally at 0o. Calculate the mass of liquid when the system reaches thermal equilibrium.

asked by Emma on November 10, 2012

How did planetesmals form planets? A. They broke apart into smaller chunks. B. They collided and stuck together. C. They cooled and pulled ice together. D. They began to rotate. Is the answer B? Thank you so much in advance.

asked by Katty on March 30, 2015
41. ## physics

Two ice skaters hold hands and rotate, making one revolution in 2.4 s. Their masses are 60 kg and 70 kg, and they are separated by 1.5 m. Find the angular momentum of the system about their center of mass.

asked by Anonymous on March 16, 2015
42. ## physics

50kg iceskater turns a bend at 7m/sec. if the radius of the curve is 5 meters, what is the centripetal force provided by the friction between the blade of the skate and the ice?

asked by Anonymous on June 9, 2011
43. ## Physics

A 45-kg skater rounds a 5.0-m radius turn at 6.3 m/s. (A.) What are the vertical and horizontal components of the force the ice exerts on her skate blades? (B.) At what angle can she lean without falling over?

asked by John on October 21, 2012
44. ## physics-heat transfer

consider a brick wall that has been exposed to the sun for some time. 1.how did the heat get from the sun's surface to the wall?(is it something about radiation?please help.) 2.the air over the wall seems to shimmer and shake as air currents rise from

asked by Emma on May 4, 2007
45. ## Physics

A light spring having a force constat of 125 N/m is used to pull a 9.50kg sled on a horizontal frixtionless ice rink. If the sled has an acceleration of 2.00 m/s^2, by how much does the spring stretch if it pulls on the sled (a) horizontally, (b) at 30.0

asked by Sarah on June 15, 2009
46. ## Thermodynamics

A 10m height cylinder with cross sectional area of 0.1 m2 has a massless piston at the bottom as shown in Figure Q2. Water is at the top of the piston with air at 20oC over it. Under the piston there is air at 300K. The volume of the air is 0.3m3. Heat is

asked by Hao on April 14, 2014
47. ## Thermodynamics

A 10m height cylinder with cross sectional area of 0.1 m2 has a massless piston at the bottom as shown in Figure Q2. Water is at the top of the piston with air at 20oC over it. Under the piston there is air at 300K. The volume of the air is 0.3m3. Heat is

asked by Hao on April 14, 2014
48. ## science

what temperature change is required to increase the reation time by a factor of 2? what temperature change is required to decrease the reation time by a factor of 2?

asked by seni on December 14, 2011
49. ## algebra

What is the surface area to volume ratio for a cube with the length of 4cm? (Area = L x W x 6, Volume = L x W x H

asked by Anonymous on January 25, 2018
50. ## geometry

how many cubes with a side length 5cm do fit in a cube with a side length 20cm?

asked by .... on April 18, 2011
51. ## dara

the volume of a cube increases at average of 24cm^3 /min while it's length increases 2 cm/min

asked by hana on January 18, 2013
52. ## Math

A. The cube roots of -27 are 3 B. The fourth roots of 81 are 3 C. 3√-1000=-√1000 D. 4√-16=-4√16 Which of the following statements are true 1. B and C only 2. A, B and C only 3. A,B,C and D 4. Some other combination of A, B, C and D

asked by Mileena on February 28, 2017
53. ## Chemistry

A lead atom has a mass of 3.40×10−22 g. How many lead atoms are in a cube of lead that has a volume of 1.40 cm^3 if the density of lead is 11.3 g/cm^3?

asked by Vy on March 7, 2011
54. ## chemistry

Say you made three different mass measurements of a sugar cube. You know the mass is 1.0g. how would you know whether or not the measurements were accurate? Precise?

asked by Alyssa on October 11, 2007
55. ## ALGEBRA

I can't find help for this one; explain. You roll a standard number cube. Find P(number less than 3). (1 point) 1/3 2/3 3/2 5/6

asked by Anonymous on January 25, 2015
56. ## chem

A lead atom has a mass of 3.4⋅10^-22 g. How many lead atoms are in a cube of lead that has a volume of 2.07 cm^3 if the density of lead is 11.3 g/cm^3?

asked by Antony on September 22, 2013
57. ## Chemistry

If 35cm cube of gas is heated from 14 degree celsius to 55 degree celsius.what is the new volume?

asked by Samuel on January 29, 2012
58. ## Chemistry

Need Help with these two problems 1.One piece of copper jewelry at 111°C has exactly twice the mass of another piece, which is at 36.0°C. Both pieces are placed inside a calorimeter whose heat capacity is negligible. What is the final temperature inside

asked by Jamie on October 12, 2008
59. ## AP Physics B (Heat Engines)

18. (II) At a steam power plant, steam engines work in pairs, the heat output of the first one being the approximate ehat input of the second. Th eoperating temeprautres of the first are 680 degrees C and 430 degrees C, and of the second 415 degrees C and

asked by Joe on December 16, 2009
60. ## Chemistry

So I am writing a lab report and Im stuck with calculating the enthalpy change of combustion of the following reaction: Mg+2HCl--> MgCl2+H2 .I am given the mass of Mg which is 5g and the concentration of HCl which is 2M and the volume of HCl which is 50

asked by Ashley on April 30, 2011
61. ## Physics

Refrigerator Suppose that you want to freeze 1.2 kg of water for a party, and only have 10 minutes to do it. Relying on nothing but your keen physical abilities, a dixie cup, duct tape and a piece of string, you manage to build a refrigerator unit which

asked by BG on November 28, 2010
62. ## Chem help!!

A rock salt (NaCl), ice, and water mixutre is used to make homemade ice cream. How many grams of rock salt must be added to lower the freezing point 10.0 degrees C? I have no idea what to do, please help! delta T = Kf*i*m delta T = 10. Kf is the molal

asked by Lindsay on May 3, 2007

Converting sunlight to electricity with solar cells has an efficiency of 15%. It's possible to achieve a higher efficiency (though currently at higher cost) by using concentrated sunlight as the hot reservoir of a heat engine. Each dish in the figure

asked by Anonymous on December 4, 2012
64. ## chemistry

A propane barbeque is used to heat up 400g of water in an aluminum pot until it is boiling. Using the following information, calculate the molar enthalpy of propane. You can assume the temperature of the water and the temperature of the aluminum pot are

asked by Bob on November 7, 2010
65. ## chemistry

thermochemistry chem conceptual. i just want to check my understanding of this Say you got this: 1)A + b=c A=4.0 grams and -91.8kj evolve How do you find change of H ? I guess you convert A to grams and then shove it under the evolved heat ? ie. change of

asked by Jim_R on August 7, 2009

Please check my answer thanks Which of the folowing process is achieved through osmosis ? A. A cube of sugar didilving in coffee B. Particles of oxygen filling the lungs C. Water moving across thr cell membranne D. Transport of proteins from the

asked by Alley on March 22, 2008
67. ## maths

a cube of material of side 3cm ( nearest mm) and mass 27 grams (nearest 10th of a gram) is placed into a bowl of deep water. Will the material sink or float? explain answer with suitable calcuations

asked by bob on January 12, 2016
68. ## math

Tina and Bruce are each rolling a 1 to 6 number cube. They are looking for different ways to roll two factors whose product is greater than 14. How many different ways will they find? Product means to multiply so 4x5, 3x5,6x5,. I chose 1 to 6 SO I have

asked by Damian on October 12, 2014

1. If the surface area of a cube is 294 inches squared, find the volume. 2. If the base of a prism is an equilateral triangle with sides 8cm, and each lateral edge measures 10cm, what is the volume of the prism.

asked by Gigi on March 3, 2013
70. ## physics

Spaceman Spiff sits just outside the Milky Way galaxy with a cup of liquid Helium which is at approximately 4K (-269 0C). He has with him a small sphere made entirely of copper which is at a temperature of 219K (-54 0C). After a certain amount of time his

asked by gian on April 27, 2010
71. ## Chemistry 30

Calculate the molar heat of reaction for the NaOH(aq) using the data obtained from this experiment. (this is a neutralization question) H2so4 Volume= 30ml Concentration=1.0mol/l Initial temp. = 29.9 NAOH Volume= 50ml C = 1.0 mol/L Initial temp. = 29 Final

asked by Marium on June 2, 2010
72. ## Government

Please critique my Introduction paragraph for my essay I changed the last sentence to make a better arguement................-In the 1981 Supreme Court Case of Rostker vs. Goldberg the debate was weather women should be included in any future draft

73. ## math

Can someone please help me with this word problem!?! I know the answer which is 784 feet. But I have no clue how to solve it. Can someone please show how to solve this problem? The word problem is: The melt in Your Mouth Chocolate Factory is a rectangular

asked by aaron on September 4, 2012
74. ## physics

To take off from the ground, an airplane must reach a sufficiently high speed. The velocity required for the takeoff, the takeoff velocity, depends on several factors, including the weight of the aircraft and the wind velocity. Part A: A plane accelerates

asked by JD on September 10, 2013
75. ## math

which of the following expressions shows the equation to use in finding the dimensions of a cube n by n by n with a volume of 125? 1]n3=125 2]n2=125 3]3n=125 4]n=125-3 5] not enough information is given.

asked by nerline 2 on November 15, 2012
76. ## Math

If each cube represents 0.25 in3, what is the volume of the prism? A) 6 in3 B) 12 in3 C) 48 in3 D) 75 in3 I am not really goo with these, but I think the answer might be b. Please give me the explanation. Thank you

asked by Becky G ( P.S. Not the celeb) on March 29, 2017
77. ## mathematics

which of the following expressions shows the equation to use in finding the dimensions of a cube n by n by n with a volume of 125? 1. n3 =125 2. n2 =125 3. 3n =125 4. n =125 __ 3 5. not enough information is given

asked by Quanna on August 28, 2011
78. ## Chemistry

HCl(aq) +NaOH(aq) ---> NaCl +H2O In a coffee cup calorimeter 50 ml of 2.00M HCl was combined with 50ml of 2.05M NaOH. a) What is the enthalpy change for the reaction? b) What is the molar enthalpy for the reaction? Given: Change in T= 14 degrees celsius

asked by Kuu on October 8, 2013
79. ## physics

A student uses spring balance of range 500gwt. He records the weight of a small iron cube of mass 100g in air, in tap water and in a concentrated solution of common salt in water. His three readings taken in the goben order are w1,w2,w3 his measurement is

asked by hari on November 24, 2016
80. ## Calculus

integrate t*(t^2 - 1)^(1/3) dt over (0,3) I substitute u = t^2 - 1 du = 2t dt which leads to integrate (1/2) u^(1/3) du over(-1,8) = (3/8) * u^(4/3) over (-1/8) = 3/8 * [8^(4/3) - (-1)^(4/3)] I would guess that (-1)^(4/3) is +1, since the cube root of -1

asked by Sean on February 5, 2011
81. ## Statistics

An investigator wants to estimate caffeine consumption in high school students. How many students would be required to ensure that a 95% confidence interval estimate for the mean caffeine intake is within 15mg of the true mean? Assume the standard

asked by Shavela on April 21, 2012
82. ## chemistry

The radiator in your car uses either water or ethylene glycol (anti-freeze) to remove heat from the engine and dissipate it to the outside air. If the water recirculation rate is 17.0 kg per minute of water and the water temperature leaving the engine and

asked by danny on January 31, 2015
83. ## chem

The radiator in your car uses either water or ethylene glycol (anti-freeze) to remove heat from the engine and dissipate it to the outside air. If the water recirculation rate is 17.0 kg per minute of water and the water temperature leaving the engine and

asked by danny on January 27, 2015
84. ## science

1. Which of the following is a reason why a person might want to wear snowshoes if walking a distance in deep snow? (1 point) snowshoes spread the person’s weight out snowshoes reduce the amount of pressure on a given spot snowshoes keep the person from

asked by pls help on April 24, 2017
85. ## Chemistry

A titration involves titrating 0.4 M NaOH into a solution of 0.2 M H3PO4. a.) Calculate the volume of NaOH that will be required to reach the first equivalence point. b.) Calculate the volume of NaOH required to reach the second equivalence point. Other

asked by Anonymous on February 8, 2014
86. ## US History

Why was the Fugitive Slave Act so controversial? (3 points) It required all Americans to return runaway slaves to their owners, and free states opposed this law. It required all runaway slaves to be hung, and most people in free and slaveholder states were

asked by Haley on February 28, 2013
87. ## Physics

Hooke's law states that it takes a force equal to kΔx is required to stretch a sorting a distance Δx beyond its rest length. A) determine a formula in terms of k & Δx that represents the amount of work required to stretch a spring to a distance Δx.

asked by Sandara on January 3, 2014
88. ## Science

A meteorite is DIFFERENT from a comet mainly because has a tail of ice and dust enters the earth's atmosphere*** has a nucleus made of snow and rock is found in the orbit between Mars and Jupiter

asked by Haley on May 16, 2017
89. ## Chemistry

Do you know how to set up the ICE? That's what you need to do. If you know but are confused, tell us what you don't understand about it. At 55 degrees celcius, the K for the reaction: 2NO2 (g) N2O4(g) is 1.15 Calculate the concentration of N2)4(g) present

asked by DrBob222 on May 15, 2007
90. ## chemistry

which of the following will result in a chemical change?A.melting ice to obtain water B.evaporating alcohol into vapor.C.drying wood in ashed D.burning coal in a furnace

asked by norman on February 5, 2012
91. ## physics

Suppose partial melting of the polar ice caps increases the moment of inertia of the Earth from 0.331MR^2 to 0.332MR^2. What is the change in length of day in seconds?

asked by nikki on March 17, 2011
92. ## chemistry

which of the following is not spontaneous process at 25 degrees celsius and 1 atm pressure? ice melting iron rusting salt dissolving steam condensing water boiling

asked by martina on April 30, 2012
93. ## Maths

Rajesh gets Rs 240 per month. He spends one-third of it on ice creams ,one-half on comic books and the remaining on wafers . Find the ratio of the money spent on each item

asked by Anonymous on July 30, 2016
94. ## chemistry

If heat of reaction, Ca(s) + 2H+(aq) Ca2+(aq) + H2(g) , is - 544 kJ/mol, heat of reaction, CaO(s) + 2H+(aq) Ca2+(aq) + H2O(l) , is -192 kJ/mol. and heat of formation of water is -286, what is heat of CaO? i found that the formation of CaO is -638. However,

asked by nicholas on February 11, 2007
95. ## Physics

A car moving initially at a speed of 80 km/h and weighing 13,000 N is brought to a stop ina distance of 61 m. Find(a) the braking force and (b) the time required to stop. Assuming the same braking force, find (c) the distance and (d) the time required to

asked by Anonymous on February 24, 2014

A number cube is rolled with these results: 64 ones, 67 twos, 73 threes, 59 fours, 72 fives, and 71 sixes. What is the experimental probability of rolling an even number? Write your answer as a percent, to the nearest tenth of a percent... A. 51.9% B.

asked by Dakota on November 6, 2015

Please check these: 1.When the fraction 2/3 is used as exponent, wht role does the denominator 3 play in evaluating expression? I think it indicates cube root of the base,correct? 2.sqrt of (2^4x/4^-2x) is equilvalent to 2^4x, correct? 3.Simplify

asked by Tabitha on December 12, 2011
98. ## math

A cylindrical metal radius 7cm and height 15cm has its centre drilled with a hole of 5cm in cross-section. If 152cm(cube) of d metal weight 125kg, what is the weight of d hallowed cylinder? How do I solve this please?

asked by birock on February 11, 2016
99. ## science

a neutron star, which is the remnant of an exploded massive star, consists of neutrons packing together with a total density of 3.03x10 14g/cm3. if you had a 1.40 cm3 sample of matter(about the size of a suger cube),what would its mass be?

asked by bonnie on February 9, 2011
100. ## physics

what is heat

asked by mara on November 12, 2015