Answer:
Explanation:
We shall consider all movement with respect to water assuming that river is at rest or motionless .
speed of canoe = 5 m /s
in five minutes , distance between hat and canoe = 5 x 60 x 5
1500 m
This distance will be covered by man in return journey . In this case his speed is 5 m /s again considering river constant .
So this will be covered at 5 m /s
time taken = 1500 / 5 = 300 s
= 5 minutes .
so it will take 5 minutes to row back to reclaim his hat .
- Show that the equation d=vt2 dimensionally correct or not? ... nalsn7 is waiting for your help. Add your answer and earn points.
Answer: has wavelengths that are longer than visible light
Explanation: Electromagnetic spectra comprises of different electromagnetic waves which are arranged in order of increasing wavelengths or decreasing energies.
In order from highest to lowest energy, the waves are arranged as: gamma rays, X-rays, ultraviolet radiation, visible light, infrared radiation, and radio waves.

E= energy
h= planck's constant
c= velocity of light
= wavelength
As wavelength and energy are inversely related, the wave having higher wavelengths will be lowest in energy. Thus as infrared radiation have lower energy as compared to visible radiation. Thus infrared radiation have higher wavelength as compared to visible radiation.
Answer:
Explanation:
Let the magnetic field be
B = 
For magnetic force , the expression is
F = L ( I x B )
= 1.5 ( 24i x
)
F = 36 B_y k - 36 B_z j
Given
F = 3 j + 2 k
Equating equal terms
we have
B_y = 2 / 36 , B_z = - 3 / 36
Now the direction of current is changed to y direction
so F = ![1.5[ 24j \times ( B_xi +B_yj +B_z k )]](https://tex.z-dn.net/?f=1.5%5B%2024j%20%5Ctimes%20%28%20B_xi%20%2BB_yj%20%2BB_z%20k%20%29%5D)
Given
F = - 3 i - 2 k
Equating equal terms
we have
B_x = 2 / 36 , B_z = - 3 / 36
So B = 2/36 i + 2/36 j - 3/ 36 k
Magnitude of B
= 4.1 / 36 T
Answer:
a)
, b)
, c) 
Explanation:
a) The final angular speed at the end of the acceleration stage is:


The angular deceleration is:



The change in angular position during the acceleration stage is:


Finally, the total change in angular position is:


b) The time interval of the deceleration interval is:


The time required for the grinding wheel to stop is:


c) The angular deceleration of the grinding wheel is:
