A ship uses sonar to measure the depth of the seabed. The signals take 20s to return to the measuring device. Calculate the depth of the sea if the speed of sound in seawater is 1500 metres/second to...
A series ohmmeter with mid scale design of 5000 ohms has a worn battery. The technician decided to use it as is even though it reads 500 ohms instead of zero when the ohmmeter leads are shorted. When...
The first will demonstrate to climate change deniers that in the past man's actions have had consequences for the entire world and could again. The second, no less important, could show to those who...
Einstein's theory states nothing can move faster than light. How did we get all the way out here with images from the beginning of time still arriving? It is also accepted that the big bang pushed...
I log in to my gmail account using IE on my Lumia 520 phone, but i can't see how to sign out of my googlemail account. Anybody know how to do it? It's perfectly possible on an Android phone using...
I have transferred a video clip from my PC to my ipad using the VLC app. I want to be able to watch it in a location that has no internet access. The first time I transferred it I used Dropbox but...
I have designed and built a device that harnesses centrifugal force.The power output is in the form of 2 x 10mm steel rod "pistons" that move up and down a distance of 15mm. I have measured the weight...
I already am sceptical about it. But that doesn't stop me being interested in other people's unusual experiences or finding out why they believe in it. This article by no means fully debunks the...
i need good quality reading glasses, my eyes are getting increasingly worse over past year. i fear i will not only need readers but will need to wear them all the time. i seen bench designer glasses...
HELLO ANY IDEA MY LAPTOP KEYS HAVE SUDDENELY BECOME VERY SLOW TO REACT TO MY FINGERS ANY IDEA'S WHY? TOOK TWICE AS LONG TO TYPE THIS TEXT AS WOULD USUALLY...
We all know the threat posed by extremists – murder, terrorism etc. Many religious moderates routinely label the criticism of religious beliefs and practices as intolerant. In doing so, do the these...
I read from, 'Sämtliche Werke und Briefe in Vier Bänden', a biography of the Berlin German woman poet; Mascha Kaléko, that in 1952 she sent one of her poems to Albert Einstein, the opening line...
I assume the sun spins, but how fast, and at what angle - if any ? I have been reading about our sun and other stars , and I see that scientists claim to be able to state how much they weigh. How do...
Excuse me if this is a sill question . I and her indoors was talking this morning about the need to reduce our sugar intake . A bottle of soft drink contains 76 g of sugar - If you dilute it with...
Do people have any opinions regarding the best kindle with a backlight?
Also,are books I have on my current kindle easy to transfer. If so, how?
Many thanks...
This error appeared right after I turned on my windows xp laptop, all I could do is just restart it but the error keeps on appearing. Is there a way to fix this problem? Or would I need a windows disk...
My TV remote isn't working. It's not the batteries, as the red light on the remote flashes when I press a button, but when I try and change the channel, or the volume, nothing happens on the screen....
