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sineoko [7]
4 years ago
5

Use the drop-down menus to answer the questions.

Physics
2 answers:
mr Goodwill [35]4 years ago
4 0

Explanation:

1. Convex mirror is curved outward.

2. Convex mirror forms an image that is smaller than the object.

3. Concave mirror is used to focus light rays. That's why it is also known as a converging mirror.

4. Plane mirror has a flat surface. It forms the same size of the image as that of the object.

geniusboy [140]4 years ago
4 0
Convex, convex, concave, and plane
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What is the relationship between the structure of a white blood cell and its function in the body.
mario62 [17]
White blood cell,also called leukocyte or white corpuscle,a cellular component of the blood that lacks hemoglobin,has a nucleus,is capable of motility,and defends the body against infection and disease by ingesting foreign materials and cellular debris,by destroying infectious agents and cancer cells.
6 0
3 years ago
The current in the electron beam of a typical video display terminal is 200 µa. How many electrons strike the screen each minute
noname [10]

The number of electrons strike the screen each minute when thee current in the electron beam of a typical video display terminal is 200 µa is 7.5×10¹⁶.

<h3>How to calculate electric charge?</h3>

Electric charge is equal to the product of electricity current flowing and the total time. It can be given as,

q=It

Here, I is current and t is time.

The current in the electron beam of a typical video display terminal is 200 µa for one minute. Thus, the total charge is,

q=200\times10^{-6}\text{ A}\times(60\text{ s})\\q=0.012\rm \;C

The number of electron flow is the ratio of total charge to the charge of one electron. The charge on one electron is 1.6×10⁻¹⁹ C. Thus, the number of electron is,

n=\dfrac{0.012}{1.6\times10^{-19}}\\n=7.5\times10^{16}

Thus, the number of electrons strike the screen each minute when the current in the electron beam of a typical video display terminal is 200 µa is 7.5×10¹⁶.

Learn more about the electric charge here;

brainly.com/question/2373424

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3 0
3 years ago
Using dimensional analysis, show that energy can be calculated from the following energy equations. Hint, in SI, here we want Jo
anyanavicka [17]

Explanation:

1. The kinetic energy of any object is calculated as :

E=\dfrac{1}{2}mv^2...........(1)

Dimensional formula of energy, [E]=[ML^2T^{-2}]

Dimensional formula of mass is [M]

Dimensional formula of velocity, [v]=[LT^{-1}]

[ML^2T^{-2}]=\dfrac{1}{2}[M]([LT^{-1}])^2

So, [ML^2T^{-2}]=[ML^2T^{-2}]

LHS = RHS

2. The potential energy is given by :

E=mgh

Dimensional formula of mass is [M]

Dimensional formula of g is [LT^{-2}]

Dimensional formula of height is [L]

Dimensional formula of energy, [E]=[ML^2T^{-2}]

So, E=[M][LT^{-2}][L]

So, LHS = RHS

Hence, this is the required solution.

7 0
3 years ago
As a wave moves through a medium, particles are displaced and (2 points)
dolphi86 [110]

Answer:A

Explanation:

Particles are displaced and return to their normal position after the wave passes

7 0
4 years ago
Read 2 more answers
An applied force of 50 N is used to accelerate an object, that weighs 73 N, to the right across a frictional surface. The object
Hunter-Best [27]

Answer:

5.38 m/s^2

Explanation:

NET force causing the object to accelerate  =  50 -10 = 40 N

Mass of the object =  73 N / 9.81 m/s^2 = 7.44 kg

F = ma

40 = 7.44 * a         a = 5.38 m/s^2

6 0
2 years ago
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