08/07/19

A worker is using a overhead crane to move crates from point A to point B. How many minutes would it take the worker to move sixty five 100-pound crates?
Note that the overhead crane has a 1000-pound lifting capacity. Each trip with the crane took 2-minutes to complete.
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08/07/19

Critical thinking math
A faucet leaks 1 oz of water per minute. If water costs $11.20 per 1000 gal, how much additional money is being spent on the water bill.
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08/07/19

can the perimeter of the rectangle be 64 units when its width is 11 units and its length is 20 units
The perimeter of a rectangle can be found using the equation p=2L + 2W Where p is the perimeter, and w is the width of the rectangle can the perimeter of the rectangle be 64 units when its width is... more
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08/07/19

Word math problem

Ninety passengers rode in a train from City A to City B. Tickets for regular coach seats cost $117. Tickets for sleeper car seats cost $294. The receipts for the trip totaled $19,557. How many... more
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08/07/19

Who was the first scientist to take an interest in color blindness?
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08/06/19

Have there ever been as many mammals as there are now?
I apologize for the weird question, but based on a Google search it looks like this topic hasn't been discussed before. I'm hoping that enough information about population biology is stored in the... more
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08/05/19

Find the remainder left if 572 is divided by 6?
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08/05/19

Can I kill bacteria with distilled water?
Given that bacteria are hypertonic (contain more salts) compared to distilled water, and that they rely on ion concentration differences across the plasma membrane to survive, can I kill a... more
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08/04/19

Is it colloquially acceptable to use ETA in place of "estimated time to completion"?
Literally, ETA means "estimated time to arrival". It is often used when traveling, like you want to know your ETA to your destination, or the ETA for the package delivery.However, often I find... more
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08/03/19

Mahmoud earns $450 per week plus a 20% commission as a car salesman. He wants his hourly salary to be at least $35.
I don’t really know how to do this problem could you help?
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08/02/19

What is the purpose of co-transport?
My current understanding of co-transport is that, first, a substance is actively transported across a membrane, establishing a concentration gradient across said membrane. This same substance then... more
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08/01/19

Are there oligocellular organisms in nature and, if so, what are they like?
I'd think protozoans can be oligocellular, but I haven't found any examples, and I'm curious to know what is the minimum number of cells an organism can have other than a single cell.
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08/01/19

What type of heat transfer is a microwave?
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08/01/19

Why is breaking glass considered a physical change?
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08/01/19

A 36 gram sample contains 28 grams of Fe and 8 grams of oxygen. Determine the percent composition for each of the elements.

Answer g Fe/ Answer g of sample x 100 = Answer% of Fe Answer g O/ Answer g of sample x 100 = Answer% of O
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08/01/19

A tank of volume 0.467 m^3 contains 3.93 mol of helium gas at 28 ◦C.The universal gas constant is 8.31451 J/Kmol, and Boltzmann’s constant is 1.38066 ×10^−23 J/K.

Find the total thermal energy of the system. Answer in units of J.
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07/31/19

What is the main purpose of physics?
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07/31/19

What keeps electrons in an atom from flying away or falling into the nucleus?
In atoms, what force or charge, etc. keeps electrons from flying away or into their nucleus? is there a kind of weak-force at work on the atomic scale? Note I am aware the electron positions are... more
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07/30/19

How many three-digit numbers can you make if you are not allowed to use any other digits except 4 and 0?
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07/30/19

What type of heat transfer is boiling water?
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07/30/19

What kind of reaction fuels the sun?
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07/30/19

Why does breaking our bones hurt, but popping our knuckles, back, etc. feel good?
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07/29/19

Basic Amino Acid Residue Binding Mechanism to DNA?
I understand that many protein DNA binding domains bind to DNA via basic residues such as Arginine and Lysine. But what is the mechanism used to bind to DNA and where on the DNA would these... more
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07/29/19

Write an equation that gives the number of carts C, needed to accommodate T, shoppers.
Some people visit a supermarket to pick up only one or two items, and they don’t use a shopping cart. Suppose, on average, five of every seven shoppers use a shopping cart. If the supermarket has... more
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07/29/19

How can "big boned people" lose bone mass?
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