We are given with a 160 kg crate in which it is moved by 10.3 meters and the coefficient of friction of the floor is equal to 0.50. The formula is expressed as W = F u d. substituting, W = 160 kg * 9.8 m/s2 * 0.5* 10.3 m equal to 8075.2 joules.
Well, there's no jet that can travel at that speed ... 14.75 km/s is like 33,000 miles per hour ! But I'll just take the numbers that are there, and work it out just the way the question says.
Distance = (14.75 km/s) x (4.25 hours) x (3,600 sec/hour)
Distance = (14.75 x 4.25 x 3,600) (km-hr-sec/sec-hr)
<em>Distance = 225,675 km</em> (a little more than half-way to the Moon)
Answer:
Sonar
Explanation:
Sonar is a technique that involves the use of sounds in viewing substances in a water medium to aid movement or communication. It makes use of the advantage of sound waves traveling faster and farther in water when compared to other types of waves such as light waves.
During World War II, the military employed the use of SONAR in imaging the seafloor by sending pulses of sound waves down through the water and measuring the time it took for the sound to bounce off the seafloor and return to the receiver.
Because a law is proven, a theory is just an explanation that may not be correct.
Ans: A quantity cannot have units until it has dimensions. A quantity that has dimensions must have units. Yes a quantity have units but still be dimensionless for example,unit of angle is radian ,but it is a dimensionless quantity. A dimensionless quantity may have unit.
