A) To obtain an inverted image of an object of same size a convex lens is used.
B)
In this question we have given
Distance between candle flame and screen=4
it means distance between candle flame and lens +distance between lens and screen =4m
u+v= 4m
u= v
therefore, 2u= 4m
or, u=-2m ( u is taken negative because it lies on left side of the lens)
and v=2m
we have to find the focal length of convex lens
Hence, Focal length of the lens is 1m
and lens should be placed at a distance of 2m from the flame
Answer:
the difference is due to resistance tolerance
Explanation:
In mathematical calculations, either done by hand or in a computer program, the heat taken from the resistors is the nominal value, which is the writing in its color code, so all calculations give a result, but the Resistors have a tolerance, indicated by the last band that is generally 5%, 10%, 20% and in the expensive precision resistance can reach 1%.
This tolerance or fluctuation in the resistance value is what gives rise to the difference between the computation values and the values measured with the instruments, multimeters.
Another source of error also occurs due to temperature changes in the circuit that affect the nominal resistance value, there is a very high resistance group that indicates the variation with the temperature, they are only used in critical circuits, due to their high cost
In summary, the difference is due to resistance tolerance.
Answer:
e. B and C
Explanation:
When the sun ignited in our solar system evaporation of the material closest to the sun took place. The low density material were pushed further. The rocks that remained formed the protoplanets. As, the early solar system was very hot parts of the protoplanets melted. This caused the melted material to flow towards the center of the planet. As the mass of the planet increases this causes more accretion which causes materials of different densities to mix.
Answer:
Distance = 4.4 [m]
Explanation:
This problem can be easily solved using a static analysis of forces acting on the ladder, taking into account the respective distances. For easy understanding, a free body diagram should be made.
We perform a sum of force on the X-axis equal to zero, to find that the force exerted by the wall is equal to the friction force on the floor.
Then we perform a summation of forces on the Y axis, to determine that the normal force exerted by the floor is equal to the weight of the ladder.
We know that the friction force is equal to the product of normal force by the coefficient of friction.
In this way, by relating the friction force to the equations deduced above we can find the force exerted by the wall.
Then we make a summation of moments around the base point of the ladder, the equation realized can be seen in the attached image.
In the last analysis we can find the relationship between the horizontal and vertical distance of the ladder, with respect to the wall and the floor.
Then with the complementary analysis of the Pythagorean theorem we can find another additional equation.
The result of the greater distance is 4.4 [m]
Answer:
The value is 
Explanation:
From the question we are told that
The power output is 
The mass of the steel is 
The temperature of the water is 
The time take is 
Generally the quantity of heat energy given out by the electric stove is mathematically represented as
=> 
=> 
This energy can also be mathematically represented as
Here 
is the specific heat of stainless steel with value 
tex]c_s[/tex] is the specific heat of water with value 
m_w is the mass of water which is mathematically represented as
=> 
So
converting to 
