
DENSITAT I PRESSIÓ _TEMA 4_EPA
Authored by Gema Bernal
Specialty
3rd Grade
Used 3+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
SI LA DENSITAT ÉS : massa/volum.
el volum es:
MASSA/DENSITAT
DENSITAT/MASSA
MASSA*DENSITAT
DENSITAT*VOLUM
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Quina és la densitat d’un material si te una massa de 20 kg I un volum total de 2 metros cúbics?
40KG/M3
10 KG/M3
22KG/CM3
10 KG/M3
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Calcula el volum d’una conducció si fa un diàmetre de 50 cm i una longitud de 350m.
274,88C3
274,88M3
68,72CM3
68,72 M3
Answer explanation
V= nº pi* r2* h=
diametre50 cm per tant radi 25cm.
25cm/100 =0,25 m
V= 3,14* (0,25*0,25)m* 350m=
68,72m3
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
SI LA PRESSIÓ ÉS = FORÇA/SUPERFÍCIE.
LA SUPERFÍCIE ÉS IGUAL A
P/F
F/P
F*P
P*S
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
SI LA PRESSIÓ ÉS FORÇA/SUPERFÍCIE. LA FORÇA ÉS IGUAL A
P*S
P/S
S/P
S+P
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Calcula la pressió que exerceix un forn què té superfície de 400 cm2 i una massa de 1250 kg (Recorda gravetat 9,8m/s2)
306,250 Pa
306,250 Pa
306.250 N
306.250 Pa
Answer explanation
P=F/S
F=g*P= 9,8 m/s2*1250Kg=12.250Newtons
S=400cm2 =400/10000=0,04m2
P=12.250N/0,04m2=306.250 Pascals
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
si tenim un volum constant i augmentem la temperatura . la pressió.......
augmenta la temperatura
disminueix
augmenta
la pressió és constant
Answer explanation
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