Solution: (i) No, none of the bulbs will glow when the switch is in the ’OFF’ position because the current will not flow through the circuit. (ii) When the switch is turned to the ’ON’ position, then all the bulbs will glow at once because they all are connected to…
No, the 9 N force would have to be applied at least 3 m from the fulcrum. the answer is no. You need the two torques to equal in order to lift something. That is 9 X 2 = lifting torque and 9 X 3 = lifted torque. A 9-N…
“You could be really daring and have the spacecraft try to land on a single large chunk within the rings, but with all the other pieces flying around, it would be a pretty dangerous place,” explains Dr. Marc Rayman, a scientist at NASA’s Jet Propulsion Laboratory. Saturn’s rings are almost…
“As this matter is urgent, I would appreciate a reply as soon as possible.” “I would be grateful for your prompt reply.” “I look forward to hearing from you as soon as possible.” “I look forward to hearing from you at your earliest convenience.” (Slightly old-fashioned.) Although I understand that…
So when you roll a ball down a ramp, it has the most potential energy when it is at the top, and this potential energy is converted to both translational and rotational kinetic energy as it rolls down. A moving car possesses mechanical energy due to its motion (kinetic energy).…
When a country exports more than it imports (i.e., the difference between exports and imports is positive), the country is said to have a trade surplus. When the opposite is true, the country is said to have a trade deficit. A trade surplus is an economic measure of a positive…
The frozen balloon shrank because the average kinetic energy of the gas molecules in a balloon decreases when the temperature decreases. This makes the molecules move more slowly and have less frequent and weaker collisions with the inside wall of the balloon, which causes the balloon to shrink a little.…
Tsunamis can travel as far as 10 miles (16 km) inland, depending on the shape and slope of the shoreline. Hurricanes also drive the sea miles inward, putting people at risk. Most people do not survive being swept into a tsunami. But there are a few ways you can protect…
Cooper’s hawks primarily eat other birds, but if prey presents itself, they eat squirrels, rabbits and rodents. Unlike other raptors, which grab their prey and bite the heads off, the Cooper’s hawk kills by repeatedly squeezing the animals with their powerful talons. Yes, hawks eat passed away snakes. Hawks are…
So in a nutshell, meteoric swords are better than late bronze and early iron in terms of strength and durability, but cannot compare to modern steel, even the most basic 1045 carbon steel will be stronger. The earliest iron forged by humans actually comes from the stars — and, as…