The electromagnetic spectrum is the system of frequencies that show electromagnetic radiation, respective wavelengths, and photon energies. Some examples of frequencies found on the electromagnetic spectrum are radio waves, microwaves, infrared, optical, ultraviolet, X-rays, and gamma-rays.
Answer:
B = 0.157 T
Explanation:
Given that,
Length of the solenoid, l = 8 cm = 0.08 m
Number of turns in the wire, N = 2000
Current, I = 5 A
We need to find the strength of the magnetic field at the center of the solenoid. It is given by the formula as follows :
, N is number of turns per unit length of solenoid.
So,
So, the magnetic field at the center of the solenoid is 0.157 T.
The minimum speed with which the athlete must leave the ground is 2.21 m/s
From the question given above, the following data were obtained:
- Maximum Height (h) = 0.25 m
- Final velocity (v) = 0 (at maximum height)
- Acceleration due to gravity (g) = 9.8 m/s²
v² = u² – 2gh (going against gravity)
0² = u² – (2 × 9.8 × 0.25)
0 = u² – 4.9
Collect like terms
u² = 0 + 4.9
u² = 4.9
Take the square root of both side
u = √4.9
u = 2.21 m/s
Thus, the athlete must leave the ground with a minimum speed of 2.21 m/s.
Learn more about projectile motion:
brainly.com/question/15604286
That statement is true.
Prof Newton said: Force = (mass) x (acceleration)
-- If the force is constant, then the right side
of the equation must be constant too.
-- The right side of the equation is the product
(mass) x (acceleration) .
-- If either of those changes, then in order to keep the product
constant, the other one has to change in the opposite direction.
-- So if the mass increases, then the acceleration decreases.
Answer:
It is mass
Explanation:
Mass is how much matter is inside an object
Density is how tight the matter is packed
Volume is how much space an object takes up.
