1,308 Answered Questions for the topic physical science

Physical Science Physics

10/04/20

Four resistors of 20Ω, 40Ω, 60Ω, and 80Ω are connected in series across a DC voltage source. If the current through this circuit is 1 A, what is the voltage applied to this circuit?
Four resistors of 20Ω, 40Ω, 60Ω, and 80Ω are connected in series across a DC voltage source. If the current through this circuit is 1 A, what is the voltage applied to this circuit?a) 20 Vb) 100... more
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Physical Science Math Chemistry Chemical

10/02/20

About the chemistry calculation
1 moles of KClO3 = 122.55 grams1 moles of KCl = 74.6 grams1 moles of O2 = 31.9988 gramsMass of test tube + MnO2 -> 21.5403gMass of test tube + MnO2 + KClO3 + KCl -> 22.5518gConstant mass of... more
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Physical Science Science Physics

09/29/20

Which ring will win the race to the bottom and why?
Suppose two rings are at the top of a ramp. The rings have the same mass, but one ring has a much larger radius than the other. Which ring will win the race to the bottom and why? (Hint: consider... more
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Physical Science Chemistry Chemical

09/28/20

What is the formula of the cobalt(II) sulfate hydrate?
A student uses gravimetric determination to find the water of hydration of a hydrated sample of cobalt (II) sulfate. The student’s sample contained 0.0098459 moles of anhydrous cobalt(II) sulfate... more
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Physical Science Math

09/25/20

why do folks still think the earth is a globe when basic math disproves it (and 200 other things)
here is something i figured out on my own using strings and balls and basic math...but when i try to post it on craigslist to see if anyone is interested in discussing it with me..it gets... more
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Physical Science

09/24/20

ionic bonds form when ions share electrons
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Physical Science Physics

09/23/20

An 348.1kg weight watcher wishes to climb a mountain to work off the equivalent of a large piece of chocolate cake rated at 342.9kcal (1 kcal = 1000 cal). How high must the person climb?
An 348.1kg weight watcher wishes to climb a mountain to work off the equivalent of a large piece of chocolate cake rated at 342.9kcal (1 kcal = 1000 cal). How high must the person climb?
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Physical Science Science Religion

09/21/20

Why do you think scientists are so unwilling to entertain the belief in a "Designer"? Give an example of the irrationality depicted in origin of life research.
You have already learned about the Miller-Urey experiment and how it exaggerated its findings with regards to the origin of life, and yet many scientists still would rather entertain the idea that... more
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09/19/20

Molecular calculation / empirical formular
Aspirin has the chemical formula C9H8O4. 1) How many grams of O are present in 1.25 moles of Aspirin?1.25 = 15.999/1 = 19.999 = 20 gO2) How many atoms of H are present in 1.25 moles of Aspirin?... more
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09/18/20

how to solve as the scientific notation
How many moles of hydroxide are in a 255 uL sample of 0.0350 M chromium (III) hydroxide solution? Answer in scientific notation
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09/18/20

what is the molecular formula?
Lactic acid, also known as milk acid, is a chemical compound that plays a role in several biochemical processes. It has a molecular formula mass of 90.0 amu and a percent composition by mass of... more
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09/18/20

What is the empirical formula?
A laboratory analysis of vanillin, the flavoring agent in vanilla, determined the following mass percent composition: 63.15 % carbon, 5.30 % hydrogen and 31.55 % oxygen. What is the empirical... more
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09/18/20

About the dimensions of a cube
Gold Cube size islength: 25.36mmwidth: 25.66mmheight: 25.41mmmass of the gold cube is 145.4757gHow to calculate volume of the cube (cm^3)?and What is the density of the cube (g/cm^3)?
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09/18/20

How to solve the volume and density?
Dimensions of cylinder.length: 76.25mmdiameter: 12.76mmMass of cylinder: 74.9650gHow to calculate the volume of the solid cylinder (cm^3) ?and density (g/cm^3)?
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Physical Science Chemistry Organic Chemistry

09/18/20

How to solve the this chemistry question
You have a copper cylinder at room temperature (30ºC). You find that the diameter of the copper cylinder is 4.52 cm and the mass of the cylinder is 95.6754 g. What is the length (h) of the copper... more
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Physical Science

09/16/20

I do not understand the process of solving this question. Please help
The density of copper is 8.92g/cm. If you plotted the mass of copper in grams versus the volume in cubic centimeters, what would the slope of the line be?
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Physical Science

09/16/20

A gas has a pressure of 312 Pa at 32C.What is its pressure at 43C
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Physical Science Physics Ap Physics Hydrostatics

09/14/20

Floating cylinder
A cylinder can of mass 3kg and the diameter 5 times greater than height is floating with 1/3 part of its volume inside the water. a) find the diameter of this can b) what minimum work is required... more
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Physical Science

09/11/20

Bullet in a Block A(n) 6.1g bullet is shot into a 6,123g wooden block standing on a frictionless surface. The block, with the bullet in it, acquires a velocity of 1.5m/s.

Bullet in a BlockA(n) 6.1g bullet is shot into a 6,123g wooden block standing on a frictionless surface. The block, with the bullet in it, acquires a velocity of 1.5m/s. Calculate the velocity of... more
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Physical Science

09/11/20

An open train car moves with speed 15 m/s on a flat frictionless railroad track, with no engine pulling the car. It begins to rain. The rain falls straight down and begins to fill the train car.

An open train car moves with speed 15 m/s on a flat frictionless railroad track, with no engine pulling the car. It begins to rain. The rain falls straight down and begins to fill the train car.The... more
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Physical Science

09/11/20

A person’s head is subjected to an impulse of 116.93 Ns in a car collision. If a force of 1,990.51 N fractures the cheekbone,

A person’s head is subjected to an impulse of 116.93 Ns in a car collision. If a force of 1,990.51 N fractures the cheekbone, what is the minimum time the cheekbone can be in contact with the... more
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Physical Science

09/11/20

Collision Effect An impulse of 130.411 Ns is required to stop a person’s head in a car collision. If the face is in contact with the steering wheel for 0.016 s, what is the force on the cheekbone?
Collision EffectAn impulse of 130.411 Ns is required to stop a person’s head in a car collision. If the face is in contact with the steering wheel for 0.016 s, what is the force on the cheekbone?
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Physical Science

09/11/20

Car Collision 01 A car with mass 1,884.2 kg, moving at 16.4 m/s, strikes a(n) 1,350.4 kg car at rest. If the two cars stick together, with what speed do they move?
Car Collision 01A car with mass 1,884.2 kg, moving at 16.4 m/s, strikes a(n) 1,350.4 kg car at rest. If the two cars stick together, with what speed do they move?
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Physical Science

09/11/20

Small rockets are used to make small adjustments in the speed of satellites. One such rocket has a thrust of 14 N. If it is fired to change the velocity of a 304.7 kg space craft by 34.2 cm/s,

Velocity ChangeSmall rockets are used to make small adjustments in the speed of satellites. One such rocket has a thrust of 14 N. If it is fired to change the velocity of a 304.7 kg space craft by... more
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Physical Science

09/11/20

Rifle Recoil A(n) 4.5 kg rifle fires a 34.3 g bullet at 397.2 m/s. What is the magnitude of the recoil momentum of the rifle in mks units?
Rifle RecoilA(n) 4.5 kg rifle fires a 34.3 g bullet at 397.2 m/s.What is the magnitude of the recoil momentum of the rifle in mks units?
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