作业帮Which of the following statements is correct?
来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/05/14 20:12:11
Which of the following statements is correct?
A.Mass and weight are different names for the same thing.
B.The mass of an object is different if the object is taken to the moon.
C.The weight of a car is one of the forces acting on the car.
D.The weight of a chocolate bar is measured in kilograms.
2. In an experiment,six identical bags of flour are balanced by a 9kg mass.Two bags of flour are removed.What mass will balance the remaining bags?
3. In which of these situations is no resultant force needed?
A.a car changing direction
B.a car moveing in a straight line at a steady speed?
C.a car slowing down
D.a car speeding up
4. How does thermal energy(heat energy) travel through the vacuum between the Earth and the Sun?
A.by conduction
B.by convection
C.by radiation
D.by radioactive decay
5.A mercury-in-glass thermometer is to be used to measure temperatures from 0℃ to 100℃.Why is mercury suitable?
A.Mercury expands when heated
B.Mercury has a boiling point below 100℃
C.Mercury has a melting point above 0℃
D.Mercury is a poor conductor
A.Mass and weight are different names for the same thing.
B.The mass of an object is different if the object is taken to the moon.
C.The weight of a car is one of the forces acting on the car.
D.The weight of a chocolate bar is measured in kilograms.
2. In an experiment,six identical bags of flour are balanced by a 9kg mass.Two bags of flour are removed.What mass will balance the remaining bags?
3. In which of these situations is no resultant force needed?
A.a car changing direction
B.a car moveing in a straight line at a steady speed?
C.a car slowing down
D.a car speeding up
4. How does thermal energy(heat energy) travel through the vacuum between the Earth and the Sun?
A.by conduction
B.by convection
C.by radiation
D.by radioactive decay
5.A mercury-in-glass thermometer is to be used to measure temperatures from 0℃ to 100℃.Why is mercury suitable?
A.Mercury expands when heated
B.Mercury has a boiling point below 100℃
C.Mercury has a melting point above 0℃
D.Mercury is a poor conductor
C
Mass is not equal to weight in meaning.Weight is the force caused by the Earth.
The mass of an object is not changed because of the different places.
The weight of the car is the force acted by the Earth.
The weight should be measured in N,not in kg.
6kg
B
CD:There exists the changes in speed
A There exists the changes in direction.
B There exists no change.
A
Mercury has a melting point below 0 and a boiling point above 100
如果想要可给你中文解释.
再问： 求第五题~
再答： 不好意思，上面第四题就是第五题，第四题被我跳过了。。。这就给你回答。 4. C（热辐射）
再答： 不好意思上面的4就是5，第4个别我给跳过去了。。。下面给你补上 4.C （热辐射）
Mass is not equal to weight in meaning.Weight is the force caused by the Earth.
The mass of an object is not changed because of the different places.
The weight of the car is the force acted by the Earth.
The weight should be measured in N,not in kg.
6kg
B
CD:There exists the changes in speed
A There exists the changes in direction.
B There exists no change.
A
Mercury has a melting point below 0 and a boiling point above 100
如果想要可给你中文解释.
再问： 求第五题~
再答： 不好意思，上面第四题就是第五题，第四题被我跳过了。。。这就给你回答。 4. C（热辐射）
再答： 不好意思上面的4就是5，第4个别我给跳过去了。。。下面给你补上 4.C （热辐射）
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