Answer:b-right
Explanation:
Given
current is flowing into the screen i.e.
direction
length of wire is also in
direction
Force experienced is in negative y direction i.e. ![-\hat{j}](https://tex.z-dn.net/?f=-%5Chat%7Bj%7D)
Force experienced by a current carrying wire in a magnetic field experience a force is given by
![F=I\left ( \vec{L}\times \vec{B}\right )](https://tex.z-dn.net/?f=F%3DI%5Cleft%20%28%20%5Cvec%7BL%7D%5Ctimes%20%5Cvec%7BB%7D%5Cright%20%29)
where I=current
L=length of element
B=magnetic field
Direction of magnetic field must be in ![\hat{i}](https://tex.z-dn.net/?f=%5Chat%7Bi%7D)
as ![-\hat{k}\times \hat{i}=-\hat{j}](https://tex.z-dn.net/?f=-%5Chat%7Bk%7D%5Ctimes%20%5Chat%7Bi%7D%3D-%5Chat%7Bj%7D)
Spectrophotometry is a laboratory technique
that can be performed first to check if there is presence of arsenic mixed in
with Gatorade. In spectrophotometry, arsenic concentration will be measure in a
specific solution by calculating the amount of light absorbed by inorganic
arsenic.
Various analytical reagents are used such as molybdate reagent and variamine blue
as a chromogenic reagent where a violet colored indicates presence of arsenic.
Furthermore,
new analytical reagents has been development and proposed like vanillin-2-
amino nicotinic acid (VANA) and 2, 4-Dihydroxy benzophenone-2-amino thiophenol
(BPBT). These are used for direct non-extractive spectrophotometric determination of arsenic. The reagent
reacts with arsenic in acidic
medium to form light greenish yellow colored.
D. Assuming that it doesn’t accelerate and then decelerate between seconds.
Answer:
-2 m/s
Explanation:
The computation of the acceleration of the block is as follows:
The volume of the block is
V = 1kg ÷ 1,000 kg/m^3 = 1 ÷ 1,000 m^3
Now at the time of submerging in the oil
Net force is
![m_g - F_B = m \times (-a)\\\\m_g - v\times S_{oil} \times g = -ma\\\\a = (\frac{v}{m} \times S_{oil} - 1) g\\\\= (\frac{1}{1000} \times 0.8 \times 1000 -1 ) \times 10\\\\](https://tex.z-dn.net/?f=m_g%20-%20F_B%20%3D%20m%20%5Ctimes%20%28-a%29%5C%5C%5C%5Cm_g%20-%20v%5Ctimes%20S_%7Boil%7D%20%5Ctimes%20g%20%3D%20-ma%5C%5C%5C%5Ca%20%3D%20%28%5Cfrac%7Bv%7D%7Bm%7D%20%5Ctimes%20S_%7Boil%7D%20%20-%201%29%20g%5C%5C%5C%5C%3D%20%28%5Cfrac%7B1%7D%7B1000%7D%20%5Ctimes%200.8%20%5Ctimes%201000%20-1%20%29%20%5Ctimes%2010%5C%5C%5C%5C)
= -2 m/s
Answer:
v=wavelength x f = 2 x 3 = 6 m/s
Explanation: