Recent content by solars

oh so it should be 3 then? thanks for the help guys =)

Which combo of polarizing filters allows most light to pass through? Each orientation is given with respect to vertical unit of following values given are angles: 1. 0, 45, 90 2. 30, 60, 90 3. 180, 0, 180 4. 90, 135, 180 5. 10,20,100 I tried by using the formulas: I1=0.5Inought...

A young soccer player stands 25 m in front of the goal. He kicks the ball at a speed of 20 m/s. The goal is 2.44 m high. What is the height of the ball when it reaches the goal? 1. 0 m (the ball is on the ground) 2. 1.15 m (the ball goes into the goal) 3. 6.26 m (the ball sails over the...

I don't know the reason why, but I have learned of something called the stopping voltage?

I looked at the electromagnetic spectrum. By bluer does it mean a darker blue, if so the wavelenght decreases so frequency increases. But the other choice says making the light brighter does that mean increasing intensity or just making it go for let's say blue to yellow?

In a photoelectric effect experiment, which of the following changes by result in a current, if there was no current flowing previously? 1. decreasing voltage in apparatus 2. decreasing frequency of the incident light 3. making the incident light brighter 4. increasing wavelength of the...

thanks for clearing things up!

Are you referring to cold fusion?

hmm i think i know where you are going with this. are you saying that the girl's initial velocity is zero then?

Yah I see now, but I know the correct answer but wasn't able to get it, so that was why I knew it was wrong.

A girl in a helicopter falls out when it was rising vertically at 10 m/s. The girl has a rope tied to her harness so she can be retireved. After 2.5 secs, how much rope has been pulled out of the helicopter? I know that this is essentially asking you to find the height that the helicopter...

thanks

Fusion reaction is not possible at room temperature because: 1) nuclei only moves at high temperatures 2) nuclei move too slowly at room temp I'm not sure about this. but i think that 2 is right. Can someone verify this? Another question that I am also wondering is that when...

Oh...it should be higher then, since it's coming closer.

Sorry I meant 444 and 436. They are the only answer choices given, but I can't figure out which one is the correct answer. I thought of doppler effect but the velocity of the truck is not given.