Answer:
C) Use a battery with more voltage.
Explanation:
The equation for the magnetic field around a coil is given by,
B = μ₀NI
where,
B = Magnetic flux density
μ₀ = permeability
N = number of turns per meter
I = Current in the wire
So when using a higher voltage battery, more current passes through the battery as resistance of the wire remains the same.
Higher frequency for lower wavelength...
.... If speed is fixed. ie no medium change.
Answer: D
X-rays generally have high energy and a high frequency.
Explanation:
High-energy X-rays or HEX-rays are very hard X-rays, with typical energies of 80–1000 keV (1 MeV), about one order of magnitude higher than conventional X-rays (and well into gamma-ray energies over 120 keV).
Radio waves have much longer wavelengths and lower frequencies than do visible light waves. In contrast, X-rays have much shorter wavelengths and higher frequencies. Likewise, red light has a longer wavelength than blue light. We can also think of light as consisting of particles or packets on information that we call photons.
Answer: Mass of the first ball is 5kg; Mass of second ball is 3.75kg
Explanation:
Given that:
Force of first ball = 15 N
Acceleration of first ball = 3 m/s2
Mass of first ball M1 = ?
Force of second ball = 15N (same force)
Acceleration of second ball = 4 m/s2
Mass of first ball M2 = ?
A) Since force is a product of mass of a substance by the acceleration by which it moves: Force = Mass x acceleration
For first ball, Force = M1 x A
15 N = M1 x 3 m/s2
M1 = 15N/3 m/s2
M1 = 5 kg
B) For second ball, Force = M2 x A
15 N = M2 x 4 m/s2
M2 = 15N/4m/s2
M2 = 3.75kg
Thus, the mass of the first ball is 5kg while the second ball is 3.75kg
