Answer:
The position is 8.18cm from the mirror.
Nature is b=virtual
Size is 1.82cm
Explanation:
Note that for a convex mirror, the image distance and the focal length are negative;
Given
Object height H0 = 4cm
object distance u = 18cm
Radius of curvature R = 30cm
Since f = R/2
f = 30/2
f = -15cm
Recall that:
![\frac{1}{f} =\frac{1}{u}+ \frac{1}{v}\\\frac{1}{-15}=\frac{1}{18}+\frac{1}{v} \\\frac{1}{v} =\frac{1}{-15} -\frac{1}{18}\\ \frac{1}{v} = \frac{-18-15}{270}\\\frac{1}{v} = \frac{-33}{270}\\v=\frac{-270}{33}\\v=-8.18cm](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7Bf%7D%20%3D%5Cfrac%7B1%7D%7Bu%7D%2B%20%5Cfrac%7B1%7D%7Bv%7D%5C%5C%5Cfrac%7B1%7D%7B-15%7D%3D%5Cfrac%7B1%7D%7B18%7D%2B%5Cfrac%7B1%7D%7Bv%7D%20%20%20%20%5C%5C%5Cfrac%7B1%7D%7Bv%7D%20%3D%5Cfrac%7B1%7D%7B-15%7D%20-%5Cfrac%7B1%7D%7B18%7D%5C%5C%20%5Cfrac%7B1%7D%7Bv%7D%20%3D%20%5Cfrac%7B-18-15%7D%7B270%7D%5C%5C%5Cfrac%7B1%7D%7Bv%7D%20%3D%20%5Cfrac%7B-33%7D%7B270%7D%5C%5Cv%3D%5Cfrac%7B-270%7D%7B33%7D%5C%5Cv%3D-8.18cm)
Since the image distance is negative, this shows that the image is a virtual image.
To get the size:
![\frac{H_1}{H_0}=\frac{v}{u}\\\frac{H_1}{4}=\frac{8.18}{18}\\18H_i=32.72\\H_i=\frac{32.72}{18}\\H_i= 1.82cm](https://tex.z-dn.net/?f=%5Cfrac%7BH_1%7D%7BH_0%7D%3D%5Cfrac%7Bv%7D%7Bu%7D%5C%5C%5Cfrac%7BH_1%7D%7B4%7D%3D%5Cfrac%7B8.18%7D%7B18%7D%5C%5C18H_i%3D32.72%5C%5CH_i%3D%5Cfrac%7B32.72%7D%7B18%7D%5C%5CH_i%3D%201.82cm)
U=0
<span>t=10 </span>
<span>a=9.8m/s/s </span>
<span>v is velocity (the tower must be very high to be able to fall for 10 seconds!!!) </span>
<span>you work out the result now</span>
Answer:
When the termination is a terminal block, care must be taken to ensure a good electrical connection without damaging the conductor. Terminals should not be used for more than one
Explanation:
The Terminal block being a modular block, having insulated frame, which can secure more than two wires in it. It has a conducting strip in it. These terminal clocks helps in making the connection safer as well as organised. These terminal blocks are used for power distribution in safer way. Its potential is it can distribute power from single to multiple output. The conductor is used for making it proper contact.
Answer:
reacts with metals: acid
reacts with nonmetal: base
taste sour: acid
can cause burns: both
conduct electricity: both
taste bitter: base
Slicing a tomato is still considered a physical change because you are only altering the shape of it by slicing it. It does not change color or make bubble when slicing the tomato. Therefore, it is still a physical change
hope this helps:)