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Paul [167]
3 years ago
8

I need help with these questions

Physics
1 answer:
grigory [225]3 years ago
7 0
I think the answer is 20
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Human populations all over the world burn fossil fuels to power cars, planes, and generate electricity. Select the statement tha
Eddi Din [679]
<span>A.) Burning fossil fuels pollutes the environment and our heavy reliance on them creates a long-term problem because they are not a renewable resource.</span>
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4 years ago
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The Rockets First company needs to hire an engineer to develop a prototype rocket. The company asks several engineers to provide
givi [52]

Answer: I believe this may be Infinity and beyond...i hope this helps you and i apologize if i am wrong.

7 0
3 years ago
2. Is this chemical equation balanced?<br> 2C4H10 (g) + 13O2 (g) = 8CO2 (g) → 10H2O (l)
ehidna [41]
Yes that is a balaned equation
3 0
3 years ago
A 240 g toy car is placed on a narrow 60-cm-diameter track with wheel grooves that keep the car going in a circle. The 1.0 kg tr
lesya [120]

Answer:

The track's angular velocity is W2 = 4.15 in rpm

Explanation:

Momentum angular can be find

I = m*r^2

P = I*W

So to use the conservation

P1 + P2 = 0

I1*W1 + I2*W2 = 0

Solve to w2 to find the angular velocity

0.240kg*0.30m^2*0.79m/s=-1kg*0.30m^2*W2

W2 = 0.435 rad/s

W2 = 4.15 rpm

8 0
3 years ago
Which cars have the same magnitude of momentum? Check all that apply. car 1 car 2 car 3 car 4 car 5
wariber [46]

Answer:

Car 1 and Car 2 have the same momentum!

Explanation:

Using the formula of momentum (P=m*v), we get for each car:

Car 1: 5kg*2.2m/s = 11kg*m/s

Car 2: 5.5kg*2m/s = 11kg*m/s

Car 3: 6kg*1.35m/s = 8.1kg*m/s

Car 4: 6.5kg*1.9m/s = 12.35kg*m/s

Car 5: 7kg*1.25m/s = 8.75kg*m/s

7 0
3 years ago
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