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ohaa [14]
3 years ago
14

SOMEONE HELP PLEASE 20 POINTS

Physics
2 answers:
professor190 [17]3 years ago
5 0
#3.
The answer would be C.

#4.
The answer would be B.

Sorry I didn't answer earlier! Just noticed that it just got answered. ):
VashaNatasha [74]3 years ago
3 0
Question three is C and question 4 is b

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Awnser thiss i need awnsers​
sveticcg [70]

Answer:

B

Explanation:

Density = mass / volume

Less dense objects float to the surface so if the liquid becomes 1000 kg/m3 then it is the densest thing in the mixture, except for Q which has a density = to that of the water so it will stay in place around the middle, since the other two are more dense they will go to the bottom of the container.

8 0
4 years ago
Read 2 more answers
Say you have a differential drive robot that has an axle length of 30cm and wheel diameter of 10cm. Find the angular velocity fo
Klio2033 [76]

Answer:

a) ω1 = 18rpm    ω2 = -18rpm

b) ω1 = 102rpm     ω2 = 138rpm

c) ω1 = ω2 = 3.18rpm

Explanation:

For the first case, we know that each wheel will spin in a different direction but with the same magnitude, so:

ωr = 6rpm   This is the angular velocity of the robot

\omega = \frac{\omega r * D/2}{r_{wheel}}  where D is 30cm and rwheel is 5cm

\omega = \frac{6 * 30/2}{5}=18rpm  One velocity will be positive and the other will be negative:

ω1 = 18rpm    ω2 = -18rpm

For part b, the formula is the same but distances change. Rcircle=100cm:

\omega 1 = \frac{\omega r * (R_{circle} - D/2)}{r_{wheel}}

\omega 2 = \frac{\omega r * (R_{circle} + D/2)}{r_{wheel}}

Replacing values, we get:

\omega 1 = \frac{6 * (100 - 30/2)}{5}=102rpm

\omega 2 = \frac{\omega r * (100 + 30/2)}{5}=138rpm

For part c, both wheels must have the same velocity:

\omega = \frac{V_{robot}}{r_{wheel}}=20rad/min

\omega = 20rad/min * \frac{1rev}{2*\pi rad}=3.18rpm

8 0
4 years ago
How are the ways in which the pluton and pegmatite minerals form similar?
Rasek [7]
There both minerals and there both
8 0
4 years ago
You are travelling by skateboard at 3.0 m/s and start to accelerate. If you
vovangra [49]

Answer: 8m/s

Explanation:

Vs= 3 m/s

Vf=?

a=0.5m/s²

t=10s

-----------

a=Vf-Vs/t

at=Vf-Vs

0.5*10s=Vf-Vs

5m/s=Vf-3m/s

5m/s+3m/s=Vf

Vf=8m/s

6 0
3 years ago
Help Please? Hshshahahahshshhs
pickupchik [31]

the answer is no change

7 0
4 years ago
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