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mart [117]
3 years ago
9

A taxi hurries 156km in 1 1/2 hours. what is it's average speed in kilometers per hour​

Physics
1 answer:
posledela3 years ago
5 0
Speed = distance travelled / change in time

speed = 156km / 1.5 hours

speed = 104km/hour
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A kettle full of water is brought to a boil in a room with temperature 20°c. after 15 minutes the temperature of the water has
kogti [31]

Answer: The temperature after another 5 minutes is 68.5°c

Explanation: Please see the attachments below

4 0
2 years ago
Planet A has a mass of 2.25 x 1020 kg, while planet B has a
denis23 [38]

The gravitational attraction between two planets is  4905.95 N

<h3>What is gravitational attraction?</h3>

When two objects with masses are placed at a distance, there will an attractive force acting between them.

According to the Newton's law of gravitation, gravitational force is

F = Gm₁m₂ /r²

where r is the distance between the masses m₁ and m₂ and  G is the gravitational constant G = 6.67 x 10⁻¹¹ N-m²/kg²

Substitute the values into the expression, we get

F =  6.67 x 10⁻¹¹ x  2.25 x 10²⁰ x 6.20 x 10¹⁸ / (435,500 x 1000)²

F= 4905.95 N

Thus, the gravitational attraction between two planets is  4905.95 N.

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6 0
2 years ago
Read 2 more answers
Dos coches, uno de 1.000 kg que circula a 100 km/h, y otro de 1.200 kg que circula a 90
Kobotan [32]

The collision of car 2 is more violent (because more impulse is exerted)

Explanation:

The collision which is more violent is the one in which more impulse is exchanged.

The impulse exerted by each car on the wall is equal to the change in momentum of the car:

I=m\Delta v

where

m is the mass of the car

\Delta v is the change in velocity

For the car 1,

m = 1000 kg

\Delta v = -100 km/h \cdot \frac{1000 m/km}{3600 s/h}=-27.8 m/s (the sign is negative because the velocity of the car has changed from 100 km/h to 0 km/h)

So the magnitude of the impulse of car 1 is

I_1 = (1000)(27.8)=27,800 kg m/s

For the car 2,

m = 1200 kg

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So the magnitude of the impulse of car 2 is

I_2 = (1200)(25)=30,000 kg m/s

So, car 2 exerts a larger impulse, therefore its impact is more violent.

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7 0
3 years ago
How do you solve this
Verdich [7]

Answer:

The answer is C

Explanation:

The radius is HALF of the diameter...so you would have to find a dividing "2".  :)

8 0
3 years ago
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Many meteorites appear to have formed very early in the solar system's history. How do these meteorites support our theory about
tigry1 [53]

Answer:

The appearance and composition of meteorites is what we would expect if metal and rock condensed and increased as our theory suggests.

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The planets and most of their satellites were formed by accretion of matter that accumulated around the largest pieces of the proto-nebula. After a chaotic succession of collisions, mergers and reconstruction processes, they acquired a size similar to the current one and moved until they were in the positions we know.

The area closest to the Sun was too warm to retain light materials. That is why the inner planets are small and rocky, while the outer ones are large and gaseous. The evolution of the Solar System has not stopped, but, after the initial chaos, most of the materials are now part of bodies located in more or less stable orbits.

Any theory that attempts to explain the formation of the Solar System should take into account that the Sun rotates slowly and only has 1 percent of the angular momentum, but it has 99.9% of its mass, while the planets have 99% of the angular momentum and only 0.1% of the mass. One of the explanations argues that, at first, the Sun was much colder; The density of its materials was slowing its rotation, while warming, until a certain balance was achieved.

6 0
3 years ago
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