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Ainat [17]
3 years ago
15

It's easier to eliminate negative self talk when we

Physics
1 answer:
ollegr [7]3 years ago
7 0
I believe your answer would be try not to think of the worst things that can happen. <span />
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4. A trolley of mass 2kg rests next to a trolley of mass 3 kg on a flat
nydimaria [60]

Answer:

a. The total momentum of the trolleys which are at rest before the separation is zero

b. The total momentum of the trolleys after separation is zero

c. The momentum of the 2 kg trolley after separation is 12 kg·m/s

d. The momentum of the 3 kg trolley is -12 kg·m/s

e. The velocity of the 3 kg trolley = -4 m/s

Explanation:

a. The total momentum of the trolleys which are at rest before the separation is zero

b. By the principle of the conservation of linear momentum, the total momentum of the trolleys after separation = The total momentum of the trolleys before separation = 0

c. The momentum of the 2 kg trolley after separation = Mass × Velocity = 2 kg × 6 m/s = 12 kg·m/s

d. Given that the total momentum of the trolleys after separation is zero, the momentum of the 3 kg trolley is equal and opposite to the momentum of the 2 kg trolley = -12 kg·m/s

e. The momentum of the 3 kg trolley = Mass of the 3 kg Trolley × Velocity of the 3 kg trolley

∴ The momentum of the 3 kg trolley = 3 kg × Velocity of the 3 kg trolley = -12 kg·m/s

The velocity of the 3 kg trolley = -12 kg·m/s/(3 kg) = -4 m/s

3 0
3 years ago
A satellite is orbiting Earth in an approximately circular path. It completes one revolution each day (86,400 seconds). Its orbi
Dafna1 [17]

For each revolution, the satellite covers the circumference
of its orbit.

The circumference of a circle is    (pi) x (diameter).

Since the satellite is 22,500 miles from the center, that number
is the radius of the circle.  The diameter is  45,000 miles.

The circumference is    (pi) x (45,000 miles) = 141,372 miles
                                                                        
The satellite's average speed is  141,372 miles per day, or

       (141,372 / 24) = 5,890 miles per hour

relative to the center of the Earth.



5 0
3 years ago
A mineral has a mas of 53grams. Its volume is 12millileters. What is the<br> density?
polet [3.4K]

Answer:

636

Explanation:

6 0
4 years ago
Read 2 more answers
What is a wave that has all the crests and troughs in the same place at the same time?
slega [8]
Wavelength
is the answer



3 0
3 years ago
Read 2 more answers
Tartaric acid is present in spinach true or false ​
sertanlavr [38]

Answer:

<h2>false</h2>

Explanation:

because Oxalic acid is present in spinach

<h2>MARK ME AS BRAINLIST</h2>
7 0
3 years ago
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