Answer:
option B is correct
66.7 cm far from front of this mirror will the real image appear
Explanation:
Given data
object height = 3 cm
concave spherical mirror distance = 10 cm
virtual image from mirror distance = 5 cm
object is place = 40 cm
to find out
how far in front of this mirror will the real image
solution
we apply here magnification equation that is
magnification = height of image / height of object = - distance of image / distance of object
height of image / height of object = - distance of image / distance of object
5 / 3 = - distance of image / 40
distance of image = - 5/3 × 40
distance of image = - 66.666 cm
here negative sign show that it is real image
so option B is correct
66.7 cm far from front of this mirror will the real image appear
Answer:
<em>Container A will weigh more</em>
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Explanation:
Both containers are identical, so we assume that they weigh the same.
They both have the same volume, and will contain an equal volume of a material.
Since they both contain water to the top, this means that their volume is fully occupied. But container B contain a block of wood <em><u>floating</u></em> in it.
The fact that the block of wood floats in the water in container B shows that it is less dense than the water around it, and in the container A, this same space is completely filled with water.
What we derive from this is that the portion of space contained by the block of wood in container B is occupied by water in container A, but, in container B, the density of this space is lesser now, since the wood block floats.
<em>Since density is mass per unit volume, and weight is proportional to mass, then we can see that the weight of this volume portion in container B is lesser than that of container A. The consequence is that container A will weigh more than container B because of this extra weight.</em>
Acoustics is the interdisciplinary science that deals with the study of mechanical waves in gases, liquids, and solids including vibration, sound, ultrasound, and infrasound. Cheers.
Answer:
A. 243 N
Explanation:
Friction is the force that opposes the relative motion between systems that are in contact.
This friction force that opposes the motion of the oak chest across the oak surface will be equal and opposite to that exerted by the woman.
First find the normal force which is the force that would point directly upwards to support weight of the block.
Normal force, N= mg where m is the mass of the chest and g is the acceleration due to gravity.
Given m=40 kg and g=9.80 m/s²
N force=40×9.80 =392N
Then find the force of friction which is given by the formula;
<em>F=μN where μ is friction coefficient for the oak chest and N is the normal force on the chest</em>
Given <em>μ</em>=0.620 and N force = 392 N then it will be;
F=0.620× 392 =243.04 N
Answer : 243 N
Answer:
Tension.
Explanation:
The tighter a string is, the more tension is applied to it; the more loose a string is, less tension is applied to it.
Therefore, when you adjust the tightness of a string you are tackling with it's tension.
Hope it helped,
BiologiaMagister