Answer:
292.31 m/s
Explanation:
If Distance (d) = 190m
Time (t) = 1.3s
Speed of sound in air (v) =?
then
2d=vt
v=2d/t
v= 2×190/1.3
v=292.31 m/s
Answer:
a. E=1440KJ
b. E=360KJ
c. E=1.8 J
Explanation:
I have the power (Watts) is expressed as Energy (Joules) / Time (seconds), also I have to
so, for the lightbulb
Analogously, for the microwave
Now, I have to express the efficiency as Heat energy / power * 100 so
Done
Answer:
0.0185 Wb
Explanation:
The magnitude of the magnetic flux through the floor of the house is given as:
|Φ| = |B| * A
Where B is the magnetic field through the floor and A is the area of the floor.
Magnetic field, B, is a vector and it is given as:
B = (3.0 * 10^(-5)) i + (3.9 * 10^(-5)) j
We have to first find the magnitude of the Magnetic field, |B|:
|B| = √{[3.0 * 10^(-5)]^2 + [3.9 * 10^(-5)^2]}
|B| = 4.92 * 10^(-5) T
The area of the floor is:
A = 25 * 15 = 375 m²
Therefore:
|Φ| = 4.92 * 10^(-5) * 375
|Φ| = 0.0185 Wb
The magnitude of the Magnetic Flux is 0.0185 Wb.
Answer:
5.99×10⁶ m/s
Explanation:
We look for the speed of the electron by applying,
F = Bqv.................. Equation 1
Where F = Force on the electron, B = magnetic field, q = charge of an electron, v = speed of the electron.
make v the subject of the equation
v = F/Bq.............. Equation 2
Given: F = 2.4×10⁻¹² N, B = 2.5 T.
Constant: q = 1.602×10⁻¹⁹ C
Substitute into equation 2
v = 2.4×10⁻¹² /(2.5× 1.602×10⁻¹⁹ )
v = 5.99×10⁶ m/s
