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BigorU [14]
3 years ago
13

A roller coaster has a vertical loop with radius 15.8 m. with what minimum speed should the roller coaster car be moving at the

top of the loop so that the passengers do not lose contact with the seats?
Physics
1 answer:
statuscvo [17]3 years ago
5 0
The centripetal force will balance the gravitional: 
<span> m*g=m*v^2/R 
</span><span> v=sqrt(g*R) 
</span><span> Plug in the numbers 
</span><span> v=sqrt(9.81*15.8) 
</span> v=<span> <span>12.45</span></span><span> m/s </span>
 
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The greater the mass of an object.
yKpoI14uk [10]

Answer:

Mass is the measure of an object's matter (what it's made up of). The greater an object's mass, the greater its gravitational force. The earth has a strong attracting force for objects with smaller mass (including the moon), and the sun has an attracting force on the earth and other planets in our solar system.

7 0
3 years ago
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B. The atomic number
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4 years ago
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Nitromethane (ch3no2) burns in air to produce significant amounts of heat. 2 ch3no2(l) + 3 2 o2( g) ¡ 2 co2( g) + 3 h2o(l) + n2
ANEK [815]

From the balanced reaction, we are given that 1418 kJ of heat is released for every 2 moles of nitromethane (CH3NO2) reacted.

So first calculate the moles of CH3NO2:

moles CH3NO2 = 5560 g / (61.04 g/mol)

moles CH3NO2 = 91.1 mol

 

So total heat released is:

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<span>total heat = -129,162.52 kJ = -129.16 MJ</span>

6 0
3 years ago
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You drive 773 miles east, then turn around and drive 773 miles west. What is your displacement, to the nearest mile?
Oliga [24]

Answer:0miles

Explanation:

Since they are moving opposite direction we say

Displacement =773-773

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8 0
3 years ago
Please help on this one?
lisov135 [29]

Answer:

The current in a resistor decreases by a factor of 4.

Explanation:

I = \frac{E}{R}

Where (I) is the current, (E) is the voltage and (R) is the resistance.

Decreasing the voltage by 4 gives;

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Since you have multiplied \frac{E}{R} by 0.25,

You have to multiply I by 0.25 so the current decreases by a factor of 4.

3 0
3 years ago
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