4,347 Answered Questions for the topic Science

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... more
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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... more
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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... more
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10/02/21

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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10/01/21

what is the mass of a pair of boots 2 grams or 2 kilograms.
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Science Math Physics

10/01/21

...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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Science Math Physics

10/01/21

...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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Science Math Physics

10/01/21

...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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Science Math Physics

10/01/21

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?
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Science Math Physics

10/01/21

...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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Science Math Physics

10/01/21

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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Science Math Physics

10/01/21

...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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Science Math Physics

10/01/21

...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... more
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09/29/21

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,... more
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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... more
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Science Chemistry Writing

09/26/21

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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Science Chemistry Physics

09/26/21

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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Science Biology

09/26/21

A study a population with genotypes BB, Bb, and bb that are in the following frequencies
A study a population with genotypes BB, Bb, and bb that are in the following frequencies: f(BB) = 0.35, f(Bb) = 0.3, and f(bb) = 0.35. Is this population at Hardy-Weinberg equilibrium (HWE)?... more
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09/26/21

“An object that was thrown upward is not a free fall” Do you agree on this statement? Explain your answer.
“An object that was thrown upward is not a free fall” Do you agree on this statement? Explain your answer.
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09/24/21

Chemistry help!

For the tetrahedral molecule, silicon tetrachloride, SiCl4(s), write the condensed electron configuration of a lone silicon atom, predict the hybridization in the molecule, and write an electron... more
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Science Physics

09/24/21

If the mass of an object is halved and it's velocity is doubled, it's momentum will not change. Explain?
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09/24/21

In an effusion experiment, it was determined that nitrogen gas, N2, effused at a rate 1.812 times faster than an unknown gas. What is the molar mass of the unknown gas?
(molar mass of N2 = 28.02 g/mol) Can u pleasee, give me the GRESA format of it?? (Given, Required, Equation, Solution, then answer) :)
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09/23/21

Algebra Chemistry Problem
A gold bar has a mass of 530,000 mg. The bar has a length of 5.2 cm a width of 2.1 cm and a density of 19.3 g/cm^3 Determine the height of the bar in millimeters. Show all work.
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