Answer:
Therefore, the spring constant of each spring = 1.6 × 10⁻⁶ kg/s².
Explanation:
The period (T) of a spring in oscillation = 2π √(m/k)............. equation 1
Where m = mass acting on the spring (kg), k = spring constant of the spring (kg/s²).
Making k the subject of equation 1
k = T²/(4π²×m) .......................... equation 2
From the question, F = 4.42 Hz,
since T = 1/F
then, T = 1/F = 1/4.42 =0.226 s, π = 3.143
since the weight of the mass is evenly distributed over the four identical spring, Hence
m = 1450/4 = 362.5 kg
Substituting these values into equation 2
k = 0.226/{(4×3.143²)362.5}
k = 0.226/(14323.751)
k = 0.0000016 kg/s²
k = 1.6 × 10⁻⁶ kg/s².
Therefore, the spring constant of each spring = 1.6 × 10⁻⁶ kg/s².
The mechanical energy isn't conserved. Some energy is lost to friction.
Option A.
<h3><u>Explanation:</u></h3>
The mechanical energy is defined as the energy of a body which it achieves by virtue of its position and velocity. The mechanical energy are of two types - potential energy and kinetic energy. The potential energy is the energy of the body which it achieves by means of its relative position and is directly proportional to the height of the body from its relative plane. Whereas the kinetic energy of the body is achieved by virtue of its velocity and is directly proportional to the square of velocity of the body.
As the mountaineer is skiing down the slope of a mountain, the potential energy of the person is gradually changing into his kinetic energy. Had it been in an ideal situation, the potential energy lost would have been just equal to the kinetic energy gained by the person. But there's friction which opposes the speed of the body and reduces the velocity. Thus the kinetic energy will be lost to some extent and the energy won't be conserved.
Answer:
Shiny metals such as copper, silver, and gold are often used for decorative arts, jewelry, and coins.
Strong metals such as iron and metal alloys such as stainless steel are used to build structures, ships, and vehicles including cars, trains, and trucks.
Some metals have specific qualities that dictate their use. For example, copper is a good choice for wiring because it is particularly good at conducting electricity. Tungsten is used for the filaments of light bulbs because it glows white-hot without melting.
Nonmetals are plentiful and useful. These are among the most commonly used:
Oxygen, a gas, is absolutely essential to human life. Not only do we breathe it and use it for medical purposes, but we also use it as an important element in combustion.
Sulfur is valued for its medical properties and as an important ingredient in many chemical solutions. Sulfuric acid is an important tool for industry, used in batteries and manufacturing.
Chlorine is a powerful disinfectant. It is used to purify water for drinking and fill swimming pools.
Explanation:
Answer:0.318 revolutions
Explanation:
Given
Initially Propeller is at rest i.e. 
after 
using 
Revolutions turned in 2 s
To get revolution 
=
