Answer:
The mass is essentially "how much stuff" is in an object. ... Weight: There is a gravitational interaction between objects that have mass. If you consider an object interacting with the Earth, this force is called the weight. The unit for weight is the Newton (same as for any other force).
Explanation:
The pulley is really a wheel and axle with a rope or chain attached. A pulley makes work seem easier because it changes the direction of motion to work with gravity. Let's say you have to lift a heavy load, like a bale of hay, up to the second floor of a barn. You could tie a rope to the bale of hay, stand on the second floor, and pull it straight up. Or you could put a pulley at the second floor, stand at the first floor, and lift the bale of hay by pulling straight down. It would be the exact amount of work in either case, but the action of pulling down feels easier because you're working with the force of gravity.
A pulley really saves effort when you have more than one pulley working together. By looping a rope around two, three, or even four pulleys, you can really cut down on the effort needed to lift something. The trade-off? Well, as you increase the number of pulleys, you also increase the distance you have to pull the rope. In other words, if you use two pulleys, it takes half the effort to lift something, but you have to pull the rope twice as far. Three pulleys will result in one-third the effort — but the distance you have to pull the rope is tripled!
Answer:
The angle between the mirrors is 90°.
Explanation:
Given that,
Number of image = 5
Rahul kept two plane mirrors at a certain angle in front of a burning candle.
We need to find the angle between the mirrors
Using given data
When Rahul kept two plane mirrors at a certain angle in front of a burning candle then see the 5 image of candle in the mirrors.
If rahul kept two plane mirrors at a 90° then we get the 5 image of candle.
Firstly we see the two images in both mirror and now first image of first mirror is see in second mirror and second image of second mirror is see in first mirror.
So, we can say that we see the 5 image of candle in the mirrors.
Hence, The angle between the mirrors is 90°.
Answer:
b. 0.75 mm
Explanation:
The distance between antinodes d is half the wavelength 
. We can obtain the wavelength with the formula 
, where f is the frequency given (
) and v is the speed of sound in body tissues (v=1540m/s), so putting all together we have:
which is very close to the 0.75mm option.
Answer:
The equation a=F/m or the acceleration is equal to the net force of an object divided by that object's mass, is an equation derived and explained by Sir Issac Newton's second law of motion. Newton's second law of motion states that the force of an object is equal to the mass times the acceleration of that object.
