Category: Physics

What were the two major flaws of continental drift? Drawbacks of Continental Drift Theory Forces like buoyancy, tidal currents and gravity are too weak to be able to move continents. Modern theories (Plate Tectonics) accept the existence of Pangaea and related landmasses but give a very different explanation to the causes of drift. What is […]

What change would make this statement a more powerful goal? The change in the statement that would make a more powerful goal would be to make it measurable by explaining how far away the target is. Hope this answers the question. Which of the following activities is most likely to improve his flexibility? The answer […]

What is the most effective insulator? aerogel Should I insulate between 1st and 2nd floors? “One would be surprised at the heat loss from the first floor to the second.” While I agree you do not need to insulate between the floors you do need to have an air barrier and insulation at the end […]

Can you reverse the direction of an electric motor? In order to reverse the direction of an AC motor, the magnetic fields must be altered to provoke movement in the opposite direction. Since each wire consists of a positive and negative current within the magnetic fields, the flip-flopping of main and starter wires causes the […]

What type of energy is stored in the spring of a watch? potential energy What type of energy is stored in the spring of a watch Class 9? Some of the common potential energies are elastic potential energy, electric potential energy, gravitational potential energy. Therefore, the energy stored in the spring watch is potential energy. […]

What is H3PO4 balanced? H3PO4 = H2O + H4P2O7. Instructions and examples below may help to solve this problem. You can always ask for help in the forum. Instructions on balancing chemical equations: Enter an equation of a chemical reaction and click ‘Balance’. What type of reaction is Koh H3PO4? Type of Chemical Reaction: For […]

When did China Land on the Moon? 14 December 2013 Is Chang E on the moon? Landing site The Lander/Ascender landed on the Moon on 1 December 2020 at 15:11 UTC. The Chang’e 5 landing site is at 43.1°N (in latitude), 51.8°W (in longitude) in the Northern Oceanus Procellarum near a huge volcanic complex, Mons […]

What is the weight of a person whose mass is 60 kg? Weight = Fg = mg = (60 kg)*(9.8 m/s2) = 588 N. Is density different from weight? The difference between Density and Weight is that density is used to measure the amount of matter contained in a unit volume. On the other hand, […]

At what position is the kinetic energy of the skater the highest? At the top of the ramp, before he starts moving downward, the skateboarder has zero KE, due entirely to the fact that he is not moving. At the bottom of the ramp, the skateboarder has maximum KE because he is moving at the […]

What is the first sign of the ecliptic? Earth’s precessional wobbling causes the vernal equinox point to migrate around the ecliptic once every 26,000 years. This point was once in Aries the Ram, hence the term “First Point of Aries.” The vernal equinox point is now in Pisces and in the late 26th century will […]