Answer:
Because electromagnetic waves can travel through empty space
Explanation:
The energy that is emitted from the sun is transferred to the earth in the form of radioactive waves. These waves are originated due to the vibration between the electric and magnetic fields. As this energy reaches the earth, it warms the earth's atmosphere, resulting in the transfer of heat energy in three possible ways namely the conduction, convection, and radiation.
This electromagnetic waves do not require any matter for the transmission of energy, and can easily travel in empty space from the core of the sun to the earth and other nearby planets. Whereas other types of waves cannot travel in space, so it is transferred in the form of electromagnetic waves only.
This equation will be balanced if the x is a 2 because there are two sodiums on the reactants sides so there must be two sodiums on the products side
Hope this helps
Answer:
friction, conduction and induction
Explanation:
Had it in class I had it correct hope this helps.
Answer:
The answer is below
Explanation:
Centripetal acceleration is the acceleration due to the movement of an object in a uniform circular motion. The acceleration is directed towards the center of the circle.
Centripetal acceleration is given by the formula:
a = v² / r; where v is the speed of the object and r is the radius of curvature (distance from object ot the center of circle).
Let us assume the car has a velocity of v m/s. For the curve with radius of curvature r:
a₁ = v² / r
For the curve with radius of curvature r = 2r:
a₂ = v² / 2r = (1/2)a₁
Therefore the centripetal acceleration is greater in the curve with radius pf curvature r and smaller in the curve with twice the radius of curvature of the other.
Answer: B)Number 1, 3 and 5 all demonstrate non-contact forces because the magnets or electrically charged objects exert forces on each other without touching.
Explanation:
Forces which act only when the two surfaces are in contact are known as contact forces. For example: frictional force is a contact force because it acts only when the two surfaces have tendency to move or are in relative motion.
Forces which act without any contact between surfaces are non-contact forces. For example: magnetic force, gravitational force, electrical force.
Because Kennedy and Lilly have to prove that some forces are non-contact forces, they must put up examples which actually show force being exerted between two objects without they being in contact. Thus, number 1, 3 and 5 demonstrate this.
