4,365 Answered Questions for the topic Science
...mara's walk consists of
Mara's walk consists of four legs with the following magnitude and direction:A = 85 m, 30 deg North of EastB = 135 m, NorthC = 85 m, 210 degD = 135 m, SouthDetermine the magnitude and direction of...
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Science Chemistry
10/05/21
Can someone please help me with this Chemistry problem?
For the equation CH4 + 2O2 → CO2 + H2O + 803.1 kJ, how much heat will be released if 2.0 × 101 g of CH4 react with sufficient O2? A. 883 kJB. 883 kJ/molC. 1.0 × 103 kJD. 1.0 × 103 kJ/molE. None of...
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Science Chemistry
10/05/21
An atom and a molecule of sodium is identical, while an atom and a molecule of oxygen are not. Give reason for the above statement.
Please answer the question As soon as possible :D
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10/04/21
I really need help with this question please and thank you!
When 1.00-gram sample of baking soda is heated, a gas is formed. The solid that remains weighs less than 1.00 g and does not have the same properties as the original sample. Is the baking soda an...
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10/04/21
Classify as mixture or pure substance
Classify as mixture or pure substanceA. Gasoline B. Oxygen gas C. Milk D. Mercury (Hg) used in a thermometer E. A tablespoon of sugar (C12H22O11)
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10/04/21
Identify the change as Physical or Chemical
Identify the change as Physical or ChemicalA. Mothballs vaporize in a closet B. A flashlight corrodes on storage.C. A piece of rubber stretches when pulled.D. Alcohol feels cool when it evaporates...
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10/04/21
Is the baking soda an element or compound? Why?
When 1.00-gram sample of baking soda is heated, a gas is formed. The solid that remains weighs less than 1.00 g and does not have the same properties as the original sample. Is the baking soda an...
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Science Biology
10/03/21
You observe a population of snow leopards before and after a very cold, long winter.
You observe a population of snow leopards before and after a very cold, long winter. The survival rates of three genotypes is as follows: AA: 30%; Aa: 90%; aa: 70%. What can you say about this...
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What is the rocket’s maximum range?
A soccer ball is kicked with an initial velocity of 45 km/h at an angle of 55° above the horizontal. What is the rocket’s maximum range?
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...Suppose a 57.76-kg package on
Suppose a 57.76-kg package on the roller belt conveyor system is moving at 0.738 m/s. What is its kinetic energy?
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...An object has a kinetic energy of
An object has a kinetic energy of 83.41 J and a mass of 34.51 kg, how fast is the object moving?
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...A 0.16 kg ball
A 0.16 kg ball is about to roll off the edge of a 12.89 m high table. What is its current PE?
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...a 53.71 kg object falls off the top
A 53.71 kg object falls off the top of 77.61 m height. How much work is required to lift the object back to its original position, assuming the lifting is down with a constant velocity.
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rocket question
A rocket of mass 1499 kg accelerates at 494 m/s^2 for 40 s from an initial speed of 3100 m/s. How fast will be the rocket be traveling after 40 s?
...A ball of mass
A ball of mass 7.91 kg moving with speed 5.86 m/s hits a wall and bounces back with speed 6.19 m/s in the opposite direction. What is the change in the ball’s kinetic energy?
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kinetic energy problem
Ford Ranger has a mass of 1140.6 kg and has a speed of 17.54 m/s. What is its kinetic energy?
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...A 1169 kg car accelerates from
A 1169 kg car accelerates from 67.26 m/s to 93.84 m/s in 12 s. How much power does that require?
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...You're riding an amusement park ride
You’re riding an amusement park ride down waterfalls, and you accelerate with a mass of 59 kg a combination of you and the ride from 4.04 m/s to 10.98 m/s in 4 s. How much power does it require?
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09/30/21
Write the number of the postulate 1,2,3 to which the statement is most closely connected.
Write the number of the postulate 1,2,3 to which the statement is most closely connected. Leave it blank if not.Postulate 1: all living things are composed of one or more cells and cell...
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Describe the motion of the marble. Be sure to explain fully, addressing the relevant underlying material.
A spring loaded cannon on wheels is traveling along a flat track at constant speed. It shoots a marble directly upward into the air. Describe the motion of the marble. Be sure to explain fully,...
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09/27/21
Chem 105, Please help! super confused and lost on these!
Calculate the volume of 0.550-M NaOH solution needed to completely neutralize 98.3 mL of a 0.630-M solution of the monoprotic acid HNO3.
80.96 mL of a solution of the acid H2C2O4 is...
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Creative writing piece
Write a creative writing piece please if anyone can help :)Write a creative writing piece on the famous chemist John Dalton
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Write a creative writing piece please if anyone can help :)
Write a creative writing piece on the famous chemist John Dalton
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