• ### A shopper pushes a grocery cart at 19.0m at constant speed on level ground?

against a 30.0N frictional force. He pushes in a direction 28.5degrees below the horizontal. a) What is the work (in J) done on the cart by friction? b) What is the work (in J) done on the cart by the gravitational force? c) What is the work (in J) done on the cart by the shopper? d) Find the force the shopper exerts (in N), using energy... show more
Physics · 9 secs ago
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• ### Please refer to the picture. The triangles are similar by the AA Similarity Postulate. Which is the correct similarity statement?

A. Triangle ABC ∼ Triangle EFD B. Triangle ABC ∼ Triangle DEF C. Triangle ABC ∼ Triangle EDF D. Triangle ABC ∼ Triangle FED
Mathematics · 10 secs ago
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• ### Refer to the picture. Are the triangles similar? If so, what postulate or theorem justifies that they are similar?

A. Yes, the triangles are similar by the Side-Side-Side (SSS) Similarity Theorem B. Yes, the triangles are similar by the Angle-Angle (AA) Similarity Postulate C. Yes, the triangles are similar by the Side-Angle-Side (SAS) Similarity Theorem D. No. The triangles are not similar.
Mathematics · 2 mins ago
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• ### How many letters are there in the alphabet?

Mathematics · 4 mins ago
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• ### Game theory, Mixed Strategy question?

When dealing with no stable solution you resort to using probabilities to find out how likely you should play A1 or A2. What I don't understand is how can the value of the game be a fraction? b1 b2 a1 3 4 a2 5 1 Using this table (payoff matrix for a) solving the probability = 4/5 so the value of... show more
Mathematics · 4 mins ago
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• ### If I am gay, is it more likely that my children will be gay?

I'm a male, I plan to have kids one day but I am gay. I plan to marry a women and have my own kids, mostly because I really really want to have my own kids. I am worried that they will all have to go through and suffer what I have though. I really want them to be normal. NOTE: THIS IS A SERIOUS QUESTION AND IS ABSOLUTELY NOT MEANT TO OFFEND... show more
Biology · 14 mins ago
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• ### A 74- kg crate is placed on an inclined ramp. At what angle does the crate begin to slide?

Physics · 19 mins ago
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• ### How many moles of hydrogen will be produced from 17.3 g of aluminum in 2Al+3H2SO4=3H2+Al2(SO4)3?

Chemistry · 22 mins ago
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• ### Physics Thermodynamics Problem?

How much heat is added to 10g of ice at (-20C) to convert to steam at (120C) Specific heat of ice is 2060 J/kg*C Specific heat of water is 4180 J/kg*C Specific heat of water vapor is 2030 J/kg*C Hf=3.34x10^5 J/kg Hv=2.26x10^6 J/kg Thank you if you can help me please.
Physics · 26 mins ago
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• ### What is the value of the larger zero of the function defined by f(x)= 2x^2+7x-4?

Mathematics · 29 mins ago
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• ### Physics Energy Problem?

A 90kg Blackhawk player moving at 5.0 m/s collides head on with a 110kg Redwing player moving at 3.0 m/s in the opposite direction. After the collision they moved off together at 1.0 m/s. How much energy was lost in the collision? Thanks
Physics · 33 mins ago
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• ### A) what minimum frequency of sound is necessary for the bat to detect an insect 0.57cm long? b) what is the period of this wave?

The smallest insect that a bat can detect are approximately the size of one wavelength of the sound the bat makes
Physics · 35 mins ago
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• ### A) what is the wavelength of a radio wave that operates at 98.1MHz? b) what is the period of this wave?

Physics · 39 mins ago
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• ### HELP W/ PHYSICS HW PLEASE? EASY 10 POINTS?

When resistors are connected in parallel, one can be certain that A. The same current flows in each one B. The potential difference across each is the same C. The power given off by each is the same D. Their equivalent resistance is greater than the resistance of any one of the indivhal resistances. I answered A. Is this correct? 2. As more... show more
Physics · 40 mins ago
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• ### CAN SOMEONE HELP ME WITH THESE PHYSICS M/C QUESTIONS? EASY 10 POINTS!!?

1. A test charge moves away from a negatively charged Van de Graff generator. What is the sign of the test charge? A. Negative B. Positive C. Neutral D. Positive or negative I said A cause like charges repel. Is that right? 2. A resistor with color code of brown blue green is equal to.. A. 65 ohms B. 600,000 ohms C. 165 ohms D. 1,600,000... show more
Physics · 54 mins ago
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• ### I feel as though something has been watching/following me for a while?

I don’t mean to come across as crazy or anything of the sorts, but I feel like something is watching me and following me. Ever since I was a child I heard a voice call my name. I don’t think it was schizophrenia because they never told me things at all, just name calling in whispers. Eventually they stopped as I got older(I’m 19 now). But now I just... show more
Paranormal Phenomena · 1 hour ago
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• ### What exactly do evolution deniers, deny?

1- Genes are the recipe for how you go together. 2- Genes change with heat or radiation or even errors in replication. 3- Change the recipe, and you change the end result. 4- The changes are random, so sometimes they hurt and sometimes they help, like gambling. 5- Organisms helped by random changes have a better chance of passing on their mutated... show more
Other - Science · 1 hour ago
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• ### 3 GRID TO EQUAL 5 ONLY USING 1-9?

Mathematics · 1 hour ago
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• ### Physics - Forces questions help?

I need help with this section: In the following, state the direction of each force acting on the object. 1. A puck experiences friction on rough ice while sliding southward. 2. The force of gravity exerts a force on you. 3. The force of gravity acts on the moon, keeping it in orbit around Earth. 4. The force of the wind pushes against a cyclist... show more
Physics · 1 hour ago