Answer:A)0.5 and 2 mm
Explanation:
Given
radius R of wire is 1 mm
magnetic Field at edge(surface)
Magnetic Field at a distance r' from Center is
and we know
where
Permeability of free space
distance from center
For
---1
For
---2
Divide 1 and 2
If r is inside the wire then
for
---3
for
----4
Divide 3 and 4
Answer:
a
Explanation:
The most reasonable conclusion of the above phenomenon is that water is a poor conductor of heat. Basically water is an insulator. The heat from surface to the bottom of the beaker will take a lot of time. Moreover, no convection current is formed so, heat might not even reach the bottom surface. Hydrogen bonding also play a vital role in determining the thermal properties of water.
hence option A is correct
Answer:
a) v= 2.1 m/s
b) ω = 0.807 rad/s
Explanation
Conceptual analysis :
The dog and the merry-go- round describes a circular motion, then, the following formulas apply :
Formula (1)
v = ω *r Formula (2)
Where:
: Centripetal acceleration(m/s²)
v: linear speed or tangential (m/s)
r : radius of the circle (m)
ω : angular speed ( rad/s)
Data
r= 2.6 m
= 1.7 m/s²
Problem develpment
a) We replace data in the formula 1 to calculate the dog's linear speed(v):
v= 2.1 m/s
b)We replace data in the formula 2 to calculate the angular speed of the merry-go- round (ω).
v = ω *r
2.1 = ω *2.6
ω = 2.1/2.6
ω = 0.807 rad/s
The Kyoto Protocol, which limits emissions of greenhouse gases for developed nations, is an example of international Law
Explanation:
The Kyoto Protocol is named after a Japanese city in which it was executed in the year 1997 on 1st December.
The basic aim of the Kyoto Protocol is to reduce/Limit the emission of greenhouse gases which contributed to global warming
The Protocol was linked to the United Nations Framework Convention on Climate Change (UNFCCC)
The important factor that led to the failure of Kyoto's Protocol are deficiencies in the structure of the agreement, such as the exemption of developing countries from reductions requirements, or the lack of an effective emissions trading scheme
Dr. Hewitt's experiment using the bowling ball to showcase the relationship between <em>momentum, energy and speed</em> of a body in motion. In his first attempt, the ball returns and stops almost exactly at the point it was launched.
- In Dr.Hewitt's first trial with the bowling ball, the ball was launched without any additional force applied, hence, the initial energy during the launch was converted to same amount of potential energy on the ball's return. Hence, stopping at the same point where the ball was launched.
- In subsequent trials, when extra force was applied, the ball went past the <em>initial launch position</em> as the potential energy as the ball returned was higher.
Therefore, the ball stopped at the <em>position of initial launch</em> during the first trial.
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