Answer:
If an object moves twice as fast its kinetic energy quadruples.
Explanation:
The kinetic energy (K₁) of a body of mass (m) that moves with speed (v) is:
K₁= 1/2 * m* v²
If we double the speed of the body, its kinetic energy (K₂) will be:
K₂= 1/2 * m*( 2v)²
K₂= 1/2 * m* 4 *v²
K₂= 4(1/2 * m *v²)
K₂= 4*K₁
Answer:
Density
Explanation:
The factors that allows magma to push its way up includes temperature and density.
Temperature is the degree of hotness or coldness of a body
Density is the mass per unit volume.
Temperature and density combines within the asthenosphere to create convective cells by which magma is force up.
- A hot magma is less dense and it is light, therefore, it rises up to crustal levels.
- A cold magma is dense and it sinks downward.
- This cyclic exchange is what drives the movement of magma at sub-crustal levels.
I believe that the resistance of the wire is 12
Answer:
The correct option is (C).
Explanation:
Electric current can be direct or alternating.
The direct current flows only in one direction. It is unidirectional.
The alternating current or an C current reverse its direction periodically.
So, the correct statement regarding the alternating current is (c) i.e. Electrons reverse direction periodically.
Answer:
white noise is a random signal having equal intensity at different frequencies, giving it a constant power spectral density