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2 years ago

A car has a mass of 1000 kg and a momentum of 12 000 kg m / s. What is its kinetic energy?

Physics

1 answer:

kozerog [31]2 years ago

5 0

Answer:

It's 7.2 x 10^10

I got that because I've put that into the calculator

but just transform it into a standard form = 72000000000

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Relating to Newton’s Third Law, action and reaction, what is the reaction when a rocket expels gas, smoke and flames from the no

Cloud [144]

Answer:

Propels in the opposite direction

Explanation:

7 0

2 years ago

If chilled coke and hot tea are <br> kept together tea cools down but ko gets warm why<br>

olga55 [171]

Tea gets cool beacuse of heat tranfer through convenction
Heat transfers from a area of hot region to cold.
The tea is hot in this case, due to taht factor the heat will move towards teh cooler region which is coke and will make the coke warm

Hope this helped!

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2 years ago

The pressure of a gas is 15 atm in a 5L cylinder. If the volume of the cylinder is depressed to 3L, What is the new pressure exe

disa [49]

P1v1=p2v2. 15x5=p2x3

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2 years ago

A roller coaster is traveling at 13 m/s when it approaches a hill that is 400 m long. Heading down the hill, it accelerates at 4

SIZIF [17.4K]

Answer:

The value is $v = 47 \ m/s$

Explanation:

From the question we are told that

The initial speed of the roller coaster is $u = 13 \ m/s$

The length of the hill is $l = 400 \ m$

The acceleration of the roller coaster is $a=4.0 \ m/s^2$

Generally the acceleration is mathematically represented as

$a = \frac{ v - u}{ t_f - t_i }$

Here $t_i$ is the initial time which is equal to zero

$v_f$ is the final velocity which is mathematically represented as

$v_f = \frac{d}{ t_f}$

$a = \frac{ \frac{d}{d_f} - u }{ t_f - t_i}$

$4 = \frac{\frac{400}{ t_f} - 13}{t_f - 0}$

$4 = \frac{400 - 13t_f}{ t_f} * \frac{1}{t_f}$

$4t_f ^2 +13f + 400 =$

Solving this using quadratic formula we obtain

$t_f = 8.5 \ s$

$t_f = -11.8 \ s$

Generally time cannot be negative so

$t_f = 8.5 \ s$

Generally the final velocity is mathematically represented as

$v = \frac{400}{8.5}$

$v = 47 \ m/s$

5 0

2 years ago

Technician A says that module communications networks are used to reduce the number of wires in a vehicle. Technician B says tha

Flauer [41]

Answer:

c) both technician A and B

Explanation:

A communication network is a collection of the interconnected networks that are managed to support the transfer of the information form a user in one network location and to a user of the another node.

Are connected as the link and to enable the communication and sharing of the data between the terminals and different modules. Hence both the A and B technicians are equally correct.

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3 years ago