Question

1 When she heard the results,Mai began to feel more confident.

Since hearing the results________________________

2.Jun bought those trousers last month,and has been weqaring them ever since

Jun has.....................................

3.Thanks,but I had something to eat earlier

Thanks,but I've................................

4.This is my first time game of water-polo

i..................................

5.Eating Chinese food is new to me

I.........................

Answer 1

1 When she heard the results,Mai began to feel more confident.

=> Since hearing the results, Mary has begun to feel more confident.

2.Jun bought those trousers last month,and has been weqaring them ever since

=> Jun has been wearing those trousers for a month.

3.Thanks,but I had something to eat earlier

=> Thanks,but I've already had something to eat.

4.This is my first time game of water-polo

=> I have never played water polo before.

5.Eating Chinese food is new to me

=> I have never eaten Chinese food before.

Answer 2

1 When she heard the results,Mai began to feel more confident.

=> Since hearing the results, Mary has begun to feel more confident.

Answer 3

2.Jun bought those trousers last month,and has been weqaring them ever since

=> Jun has been wearing those trousers for a month.

 

Answer 4

3.Thanks,but I had something to eat earlier

=> Thanks,but I've already had something to eat.

Answer 5

4.This is my first time game of water-polo

=> I have never played water polo before.

Answer 6

5.Eating Chinese food is new to me

=> I have never eaten Chinese food before.

Answer 7

 

duongntt120918/12/2019

Đáp án:

$P=0,78N$ 

Giải thích các bước giải:

Ta có: ⎧⎪ ⎪ ⎪ ⎪⎨⎪ ⎪ ⎪ ⎪⎩ΔP=0,15Ndn=10000N/m3ds=78000N/m3Vr=5cm3=0,000005m3{ΔP=0,15Ndn=10000N/m3ds=78000N/m3Vr=5cm3=0,000005m3

Trọng lượng của viên bi khi ở ngoài không khí là: P

Khi nhúng vào nước ta có:

P′=P−FA⇒FA=P−P′=0,15NP′=P−FA⇒FA=P−P′=0,15N

Lại có: FA=dn.V⇒V=FAdn=0,1510000=0,000015m3FA=dn.V⇒V=FAdn=0,1510000=0,000015m3