The answer is D) none of the above
A high pitch always corresponds to a high frequency wave
Answer:
B = 4.41 10⁻⁴ T
The direction of the magnetic field is perpendicular to the speed in such a way that if the force is in the clokwise direction
Explanation:
For this problem let's use Newton's second law where the force is magnetic
F = ma
the magnetic force is
F = q v x B
The bold are vectors, as they indicate that the magnetic field and velocity are perpendicular the magnitude of the force is
F = q v B
acceleration is centripetal
a = v² / r
we substitute
q v B = m v² / r
B = m v / q r
Since the velocity modulus is constant, we can use the relation of uniform motion with the time of a lap that we call period (T)
v = d / t
the length of the circle is
d = 2π r
v = 2π r / T
we substitute in the magnetic field equation
B = m /qr (2π r / T)
B = m/q 2π / T
we calculate
B = 2 9.1 10⁻³¹ / 2 1.6 10⁻¹⁹ 2π / 81 10⁻⁹
B = 4.41 10⁻⁴ T
The direction of the magnetic field is perpendicular to the speed in such a way that if the force is in the clokwise direction, for example if the speed goes on the positive axis the field goes up
Answer:
The mass of water is
Explanation:
Given that,
Area of town = 29 km²
Time = 30 min
Height = 2.4 inch
Mass = 103 kg
We know that,
1 m = 39.37 inch
So,
We need to calculate the volume
Using formula of volume
Put the value into the formula
We need to calculate the mass of water
Using formula of density
Put the value into the formula
Hence, The mass of water is