Julli0Kub
25.11.2021 12:48

C. Assessment/Application/Outputs (Please refer to DepEd Order No. 31, s. 2020) Directions: Choose the letter of the correct answer. Write your answer on a separate sheet of paper.
Example:
Which of the following is NOT an electromagnetic wave?
A. infrared
B. radio
C. sound
D. X-ray
Answer: C
Start here:
1. How does the wavelength of infrared (IR) compare with the wavelength of ultraviolet (UV) waves?
A. Infrared waves have a longer wavelength.
B. Infrared waves have a shorter wavelength.
C. IR waves have the same wavelength as the UV waves.
D. IR waves are not comparable in wavelength with the UV waves.
2. Among all the electromagnetic waves (EM), which has the highest frequency?
A. infrared radiation B. gamma rays
C. radio waves D. ultraviolet light
3. ROYGBIV is the basic component of white light. Which color of light carries the highest energy?
A. blue
B. green
C. orange
D. violet
4. Light is an electromagnetic wave. Which characteristic is common in all electromagnetic waves in a vacuum?
A. amplitude B. frequency
C. speed
D. wavelength
5. Which of the following is NOT true about the nature of light?
A. Light is an electromagnetic wave.
B. Light is a mixture of ROYGBIV colors of light.
C. Light is a form of energy that travels in space.
D. Light has a constant speed of 3 x 108 m/s in any medium.
6. Which electromagnetic wave is used in a microscope?
A. infrared radiation B. gamma rays
C. visible light
D. ultraviolet light
7. When the red light is compared with violet light in a vacuum.
A. both travel at the same speed
B. both have the same frequency
C. both have the same wavelength
D. red light travels faster than violet light
с переводом:
PRINCIPLES OF RADIO COMMUNICATIONS
Developing an understanding of radio communications begins with the
comprehension of basic electromagnetic radiation.
Radio waves belong to the electromagnetic radiation family, which includes
x-ray, ultraviolet, and visible light — forms of energy we use every day. Much
like the gentle waves that form when a stone is tossed into a still lake, radio
signals radiate outward, or propagate, from a transmitting antenna.
However, unlike water waves, radio waves propagate at the speed of light.
Radio wave amplitude, or strength, can be visualized as its height —
the distance between its peak and its lowest point. Amplitude, which is
measured in volts, is usually expressed in terms of an average value called
root-mean-square, or RMS.


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Заря101
24.01.2023 22:52

I love shopping. I love looking around the shops and seeing all the things and people. My friends say I like to spend money. It’s probably true. There’s a very good supermarket near me. They have everything you need for your house. If you want a tin of sardines, a tube of toothpaste, a box of chocolates, a carton of milk, a packet of biscuits, a bottle of lemonade or a jar of jam, you can buy it at the supermarket. They sell everything. If you want a lot of things, you can use a trolley. If you don’t want much, you can use a small basket. If you can’t find all the things, which you want, on the shelves, ask a shop assistant for help. When you have chosen everything, you have to stand in the queue at the check-out to pay for your purchase. You may pay with your debit card or in cash. If you pay in cash, give your money to the cashier. He or she will put it into the till and give you your change. If there is anything wrong with the service or any goods, customers can complain to the manager. Our supermarket is super

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Ответ:
rinett
24.01.2023 22:52

1. Tom isn’t playing tennis tomorrow afternoon, he (not/play) tennis yesterday. b) didn’t play

2. you dinner already? c) Have ... had

3. He his driving test. He is so happy. He hasn’t been able to pass it for three years. a) has just passed

4. I my keys. I can’t get in. a) Have lost

5. My parents at a restaurant. b) were not eating

6. James and Phil a tree house. c) were building

7. The birds in the tree. b) were sitting

8. Why you (cry)? Is anything wrong? b) are you crying

9. My mother a bad headache. c) has got

10. Where the Johnsons (live)? a) do

11. Margie and her sister wonderful voices. c) have got

12. I (not/understand) that man because I (not/know) English.

c) don’t understand, don’t know

13. You down the street. c) were rushing

14.There isn’t a cloud in the sky, but it (be) cloudy in the morning. b) was

15. Mrs. Clay usually finishes her work at half past three, but she (finish) it later yesterday afternoon. c) finished

16. Every day I help my Mom about the house, but last week I was very busy with my exam. So I (not/help) her much. c) didn’t help

17. The taxi . Hurry up! c) has irrived

18. The dog . a) was barking

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