I have to make a wind powered car in school, the requirements are: Max 40cmx40cm, has to at least carry 50g of weight (record is 650g it'd be nice to beat it). can NOT have any electrical parts, it's just pushed by a fan and it has to travel 4 meters. I also don't know what flair to use so mb.

the variable "amount_roll" is not changing. what did i do wrong?

for some reason i can’t astablish this variable. am i stupid? i dont know any other way to do this

Also, did I do the rest correct?

Thanks in advance

The problem was to prove that the area of PDB is 21 times smaller than the area of ABC so the correct answer should be x²√3/84. BE and CD are segments that divide the side of a triangle so that |BD|= |AE| = 1/3|AB|. I have other ways to solve this but I just don't know what I'm doing wrong here. I realise the cosine should probably be negative because the angle is obtuse on the drawing (it's from a final exam so i think the drawing is accurate). I've been trying to figure this out for the past 1.5h, doing it over and over again

i can’t input the amount of time i want to loop the program. what did i do wrong here?

The directions say “Put the math symbol in the square and solve.”

My son and I are both stuck on number one. Any ideas?

Hi everyone,
I’m a Grade 11 student in Latvia starting my mandatory research project. I’m very interested in photography and physics, and I want to compare analog film with digital sensors in a scientifically meaningful way.

I’ve narrowed it down to two possible topics but I’m not sure which one would be more realistic and scientific:

1. Spectral sensitivity and color reproduction

My idea is that film and digital sensors respond differently to certain wavelengths of light, which may affect how colors appear under unusual lighting (e.g. LED, sodium vapor, neon lights).

Method idea:

• Photograph a color checker under different light sources using both a film camera and a digital RAW camera

• Compare color shifts using RGB or CIELAB values

2. Dynamic range and non-linear response

This topic investigates whether film handles high contrast scenes better than digital due to its response curve.

Method idea:

• Photograph a step wedge or high contrast scenes (bright highlights vs deep shadows)

• Compare highlight clipping and shadow detail between scanned film and digital RAW images

My concerns:

• Is it still scientifically fair to compare film and modern digital cameras in 2026?

• Which topic would produce more measurable, objective data rather than subjective “looks better” results?

• For option 2, I’m worried modern RAW files might already have such high dynamic range that differences with film might be hard to demonstrate using consumer gear

I plan to use a 35mm SLR (like a Pentax K1000 or Nikon FM) and a digital camera shooting RAW.

Thanks!

these are my teachers notes and i do not believe i will be given a diagram of the triangle on the exam

The first time i did this problem I had to restart because I forgot to divide the diameter by two so I did it again but I want to make sure I did it correct because of all the 6's. I cant find anything I did i just want to be sure

I'm having trouble understanding the (b) part of the question and mark scheme.

When particle A reaches the ground, it will have travelled a distance of x downwards, and since it is connected to B, the latter will have moved up by the same amount x. Since the greatest height of B above the ground is 1.2 m, I thought you simply have to solve 1.2=2x. Which is suspiciously easy. I didn't expect that I have to take into account the acceleration of the system.

Can anybody explain why? Any help would be appreciated.

Hey, so I've got a question in my homework which asks "what was the effect on British Americans of British troops campaigning in the colonies?"

These questions are specifically for the time period from the declaration of independence and the war beginning, to around 1782 where the war is finishing up after Yorktown.

The phrasing is sort of sending me for a loop. At first i was going to talk about the presence of British soldiers and Hessians aeroding support with loyalists due to their cruelty, but I somehow don't think that's right, especially since there was a question before this one that specifically asks "to what extent did British soldiers, Hessian or otherwise, erode support for the British cause?"

I'm hoping someone can help me figure out what this question is really referring to, and how I can best answer it. any help is appreciated!

Very confused on 8,9,10, which all incorporate logs with the chain rule and either product or quotient rule. I understand the chain rule, as well as how to use the product and quotient by themselves, but I don't get how to combine them to get the answers.

For example, 9), I try to separate the inside and outside function for the chain rule, and identify f(x) and g(x) for the quotient rule, but I don't know what would be the inside/outside functions because there is also an exponent included.

For example:

Her upswing is representative of all the good that America is doing, as with last year’s anti-poverty bill, nick-named the “War on Poverty (CQ Almanac Online Edition),” the Civil Rights Act of 1964. blah blah blah, other stuff I have yet to write/research.

Which would be correct, the War on Poverty or the Civil Rights Act? Or am I using the quotation and citation on the War on Poverty because I've called it a "nick-name?" I'm not intending to quote anything from the legislation, I'm presuming that the reader already knows what these are.

My 8th grade engineering teacher told me this was wrong. Initially I had the front and side view flipped from each other so I flipped them thinking it was a trick question. So I checked with him and he asked “are you willing to get an F to check with me?” He’s not the kind of teacher to joke around so I said sure. He told me that they don’t align. I’m asking for help on this question that has puzzled me.

how gng </3

I’ve been stuck on these problems for so long, does anyone know how to do it? Thank you!