Category: Physics

Does a solar water heater work at night? Since solar water heaters require the sun to heat water, you may be wondering if they can provide you hot water at night. Since solar water heaters require the sun to heat water, you may be wondering if they can provide you hot water at night. The […]

What is the pH of oxygen? roughly 7.4 Does baking soda oxygenate water? Baking soda is an alkaline, or base, substance. This means that when we dissolve baking soda in water, it forms an alkaline solution. Is it OK to take baking soda every day? The amount of baking soda recommended is based on age. […]

Can you see geostationary satellites? Unlike the ISS and the many objects in low Earth object, geostationary satellites are visible all night long every night of the year. They only disappear for up to 70 minutes a day when entering Earth’s shadow about two weeks either side of each equinox. What is the difference between […]

How does the force of gravitation between two objects change when the distance between them is reduced to half Class 9 Ncert? How does the force of gravitation between two objects change when the distance between them is reduced to half? Ans. The force of gravitation between two objects is inversely proportional to the square […]

Can I sell biogas? Making business out of Biogas: You could sell it at Rs 20/Ltr and he would need atleast 20 Ltr. That would make it Rs 20×20 Ltr = Rs400 per person. If you can sell it to 10 people every day that would make it Rs 4,000 per day. That would make […]

Is it important to study science? Firstly, science helps our understanding of the world around us. Everything we know about the universe, from how trees reproduce to what an atom is made up of, is the result of scientific research and experiment. Human progress throughout history has largely rested on advances in science. What are […]

What is the normal to a line? The normal line to a curve at a particular point is the line through that point and perpendicular to the tangent. A person might remember from analytic geometry that the slope of any line perpendicular to a line with slope m is the negative reciprocal −1/m. How do […]

Why is the Ph of ethanol 7? Ethanol’s hydroxyl group causes the molecule to be slightly basic. It is almost neutral like water. The pH of 100% ethanol is 7.33, compared to 7.00 for pure water. This reaction is not possible in an aqueous solution, as water is more acidic, so that hydroxide is preferred […]

What is the next step after radiation for prostate cancer? After radiotherapy or brachytherapy, your PSA should drop to its lowest level (nadir) after 18 months to two years. Your PSA level won’t fall to zero as your healthy prostate cells will continue to produce some PSA. Your PSA level may actually rise after radiotherapy […]

What color light does a green object absorb? This graphic shows what color will be perceived when a material absorbs in certain regions of the visible spectrum….Complementary Colors. Color absorbed Color seen Blue Orange Green Red Yellow Violet Orange Blue Why does blue glow yellow? Because yellow light is a mixture of red and green […]