Utjevanje snovi - Tlak in vzgon

Utjevanje snovi - Tlak in vzgon

9th Grade

15 Qs

quiz-placeholder

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Utjevanje snovi - Tlak in vzgon

Utjevanje snovi - Tlak in vzgon

Assessment

Quiz

Physics

9th Grade

Practice Problem

Hard

Created by

Nani Vasiljević

Used 17+ times

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15 questions

Show all answers

1.

OPEN ENDED QUESTION

3 mins • Ungraded

Zakaj imajo otroci, ki ne znajo plavati, pri plavanju v globoki vodi na rokah napihnjene rokavčke?

Evaluate responses using AI:

OFF

2.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Telo s prostornino 3,5 dm³ je v celoti potopljeno v vodi. Kolikšen je vzgon na telo?

 σvode=10000 Nm3\sigma_{vode}=10000\ \frac{N}{m^3}  

3,5N

35N

350N

35000N

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Media Image

V vodi so tri kocke. Kocka A lebdi, kocka B plava, kocka C pa je obešena na vrvici. Na katero telo deluje največja sila vzgona?

A

B

C

4.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Kolikšen tlak povzroča človek z maso 60kg na tla, ko stoji z obema nogama na tleh? Velikost njegovega stopala je 200cm2 ?

0,15 bar

1,5 bar

1500 bar

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Oznaka količine tlak je Pa .

Drži.

Ne drži.

6.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Ustrezno pretvori enote za tlak.

5 Ncm2=50 kNm25\ \frac{N}{cm^2}=50\ \frac{kN}{m^2}

5 Ncm2=5 kNm25\ \frac{N}{cm^2}=5\ \frac{kN}{m^2}

5 Ncm2=0,5 kNm25\ \frac{N}{cm^2}=0,5\ \frac{kN}{m^2}

5 Ncm2=500 kNm25\ \frac{N}{cm^2}=500\ \frac{kN}{m^2}

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Tlak v podlagi je obratno sorazmeren s silo, ki pritiska na podlago, in premo sorazmeren s stično površino.

Da

Ne

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