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Transfer de Căldură - Conductie, Convecție și Radiație Clasa 7

热量第4章7年级科学

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传热-导热、对流和辐射课程7年级
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Engleză (Statele Unite ale Americii)
99 de limbi Subtitrări
1 ore 4 min
Conținut total

Ce vei invata

Q.1. 陈述实验室温度计和临床温度计之间的相似性和差异。
Q.2. 给出导热和绝热体的两个例子。
Q.3. 填空：(a) 物体的热度由其__________决定。 (b) 沸水的温度不能用__________温度计测量。
(d) 热量传递过程中不需要介质的是__________。

Conținutul cursului

6 secțiuni • 6 cursuri • 01:04:21 lungime totală

Introduction

01:37
In this course, we will discuss various aspects relating to “Heat” including the following:
  1. Is our sense of touch reliable to decide whether an object is hot or cold?
  1. What is clinical thermometer and how can we read a thermometer?
  1. Why does the mercury not fall or rise in a clinical thermometer when taken out of the mouth?
  1. Is the body temperature of every person 37°C?
  1. What is laboratory thermometer? For which purpose, it is used?
  1. What are the three modes of transfer of heat?
  1. Discuss the process of conduction, convection and radiation with examples.
  1. How does the heat travel in air?
  1. Write a note on Sea Breeze and Land Breeze.
  1. How does the heat from sun reach us?
  1. Is it possible to construct buildings that are not affected much by heat and cold outside?
+ 11 NCERT Questions with Answers

Heat chapter explained

43:40
  1. Is our sense of touch reliable to decide whether an object is hot or cold?
  1. What is clinical thermometer and how can we read a thermometer?
  1. Why does the mercury not fall or rise in a clinical thermometer when taken out of the mouth?
  1. Is the body temperature of every person 37°C?
  1. What is laboratory thermometer? For which purpose, it is used?
  1. What are the three modes of transfer of heat?
  1. Discuss the process of conduction, convection and radiation with examples.
  1. How does the heat travel in air?
  1. Write a note on Sea Breeze and Land Breeze.
  1. How does the heat from sun reach us?
  1. Is it possible to construct buildings that are not affected much by heat and cold outside?

Q.1. State similarities and differences between the laboratory thermometer and t

04:21

Q.1. State similarities and differences between the laboratory thermometer and the clinical thermometer.

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Students interested in Chapter - Heat

Despre acest curs

Q.1. 陈述实验室温度计和临床温度计之间的相似性和差异。

Q.2. 给出导热和绝热体的两个例子。

Q.3. 填空：

(a) 物体的热度由其________决定。

(b) 沸水的温度不能用______温度计测量。

(c) 温度以度______计量。

(d) 热量传递过程中不需要介质的是______。

(e) 一根冷的钢勺浸入一杯热牛奶中。热量通过______过程传递到它的另一端。

(f ) ______颜色的衣服比浅色衣服更好地吸收热量。

Q. 4. 匹配以下项：

(i) 陆风吹在     (a) 夏天

(ii) 海风吹在     (b) 冬天

(iii) 深色衣服在  (c) 白天

(iv) 浅色衣服在  (d) 夜晚

Q.5. 讨论为什么在冬天穿多层衣服比穿一件厚衣服更保暖。

Q.6. 看图4.13 标出热量通过导热、对流和辐射传递的位置。

Q.7. 在炎热气候的地方，建议将房屋外墙涂成白色。解释原因。

Q.8. 一升30°C的水与一升50°C的水混合。混合物的温度将是

Q.9. 一个40°C的铁球被放入一个40°C的水杯中。热量将

(a) 从铁球流向水。

(b) 不会从铁球流向水或从水流向铁球。

(c) 从水流向铁球。

(d) 增加两者的温度。

Q.10. 一根木勺浸入一杯冰淇淋中。它的另一端

(a) 通过导热过程变冷。

(b) 通过对流过程变冷。

(c) 通过辐射过程变冷。

(d) 不会变冷。

Q.11. 不锈钢锅通常配有铜底。这可能是因为

(a) 铜底使锅更耐用。

(b) 这样的锅看起来更有色彩。

(c) 铜是比不锈钢更好的热导体。

(d) 铜比不锈钢更容易清洁。

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