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Fantom [35]
2 years ago
10

A physical change is a change to the physical properties of a substance. This type of change does

Physics
1 answer:
LiRa [457]2 years ago
5 0

Answer:

False

Explanation:

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In a race, you run 3000 meters east in 21 minutes. What is your velocity in km/min?
STALIN [3.7K]

velocity = distance / time      v= d/t          firstly you change 3000 m into km     distance  D = 3000/1000  = 3 km             secondly   time t = 21 min      using velocity formula v = d/t       = 3 km/21min       =0.142km/min

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2 years ago
A __________ painted curb designates an area where there is no stopping, parking, loading, or standing.
Vedmedyk [2.9K]
The answer to this question is the red painted curb. The red painted curb means that the vehicle is not suppose to stop and park in the red curb. It also means that people should not stand in that area. Red painted curb also marks as a fire lane for schools.
4 0
3 years ago
A plastic rod has been bent into a circle of radius R = 8.00 cm. It has a charge Q1 = +2.70 pC uniformly distributed along one-q
vovikov84 [41]

Answer:

Part a)

V = -1.52 V

Part b)

V = -1.16 V

Explanation:

Part a)

Electric potential is a scalar quantity

so here we can say that total potential due to a ring on its center is given as

V = \frac{kQ}{R}

here we know that

Q = Q_1 - 6Q_1

Q = - 5 Q_1

Q_1 = 2.70 pC

now we have

V = \frac{(9\times 10^9)(-5\times 2.70 \times 10^{-12})}{0.08}

V = -1.52 V

Part b)

Potential on the axis of the ring is given as

V = \frac{kQ}{\sqrt{r^2 + R^2}}

V = \frac{(9\times 10^9)(-5\times 2.70\times 10^{-12})}{\sqrt{0.08^2 + 0.0671^2}}

V = -1.16 V

8 0
2 years ago
1. Which statement is true about natural
lara [203]

Answer:

1. D. They can be a substance, material, object or  source of energy.

2. B. The properties will be different.

3. C. When two reactants form one product, the  reaction is spontaneous.

4 0
2 years ago
It took 50 joules to push a crate 2.5 meters. With what force was the crate pushed?
Inga [223]

It took 50 joules to push a crate 2.5 meters. With what force was the crate pushed?

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2 years ago
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