Sound waves (m)
water waves (m)
radio waves (e)
ultraviolet (e)
waves in a wheat field (m)
Answer:
Explanation:
area of square loop A = side²
= 8.4² x 10⁻⁴
A = 70.56 x 10⁻⁴ m²
when it is converted into rectangle , length = 14.7 , width = 2.1
area = length x width
= 14.7 x 2.1 x 10⁻⁴
= 30.87 x 10⁻⁴ m²
Let magnetic field be B
Change in flux = magnetic field x change in area
= B x ( 70.56 x 10⁻⁴ - 30.87 x 10⁻⁴ )
= 39.69 x 10⁻⁴ B
rate of change of flux = change in flux / time taken
= 39.69 x 10⁻⁴ B / 6.5 x 10⁻³
= 6.1 x 10⁻¹ B
emf induced = 6.1 x 10⁻¹ B
6.1 x 10⁻¹ B = 14.7 ( given )
B = 2.41 x 10
= 24.1 T
B ) magnetic flux is decreasing , so it needs to be increased as per Lenz's law . Hence current induced will be anticlockwise so that additional magnetic flux is induced out of the page.
At r = 2R> R The expression for the electric field will be given by: (2R)^2*E=kQ. Where, k=(9*10^9)N.m/C^2, Q=(8*10^-10)C and R=0.025m. So substituting and clearing, we have that the magnitude of the electric field will be: E=(9*10^9)*(8*10^-10)/((2*0.025)^2)=2880 N / C.
Answer:
Acceleration of the crate is 0.362 m/s^2.
Explanation:
Given:
Mass of the box, m = 40 kg
Applied force, F = 15 N
Angle at which the force is applied, 
= 15°
We have to find the magnitude of the acceleration.
Let the acceleration be "a".
FBD is attached with where we can see the horizontal and vertical component of force.
⇒ 
and ⇒ 
⇒ 
⇒ 
⇒ Applying concept of forces.
⇒ 
⇒ 
⇒ 
<em> ...Newtons second law Fnet = ma</em>
⇒ 
⇒ Plugging the values.
⇒ 
<em>...f is the friction which is zero here.</em>
⇒ 
⇒ 
Magnitude of the acceleration of the crate is 0.362 m/s^2.
Answer:
D. 0.60 um
Explanation:
Given the following data;
Frequency = 5.0x10^14 Hz
Speed = 3 x 10^8 m/s
To find the wavelength;
Wavelength = speed/frequency
Substituting into the equation, we have
Wavelength = 3 x 10^8/5.0x10^14
Wavelength = 6 × 10^7m
But 1 meter (m) = 1000000 micrometer (um)
6 × 10^7 meter = 0.6 micrometer.
