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kompoz [17]
3 years ago
11

A car has a mass of 1.20 × 103 kilograms and a momentum of 2.00 × 104 kilogram meters/second. What is the velocity of the car?

Physics
2 answers:
patriot [66]3 years ago
8 0
<span>momentem = mass * velocity also, be sure to use the carrot for exponents 10^3 and 10^4. 20000/1200 = 16.7,This is your answer,That was hard lol.



Hope the helps.

</span>
Vera_Pavlovna [14]3 years ago
3 0
We know, Momentum = Mass * velocity 
2 * 10⁴ = (1.20 * 10³) (v)
v = 2 * 10⁴ / 1.20 * 10³
v = 1.67 * 10
v = 16.7 m/s

In short, Your Answer would be Option C

Hope this helps!
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30 points plz help ill do anything... literally anything.
ruslelena [56]

Answer:

1. 2.5s

Explanation:

1. For time, divide Distance / speed

25m / 10

=2.5s

3 0
3 years ago
A circular conical reservoir has depth 20 feet and radius of the top 10 feet. water is leaking out so that the surface is fallin
levacccp [35]

As per given condition we know that vertex angle of the cone is given as

tan\theta = \frac{R}{H}

so here we can say that vertex angle will remain constant

so here

\frac{r}{y} = \frac{R}{H}

\frac{r}{8} = \frac{10}{20}

r = 4 feet

now for the volume we can say

V = \frac{1}{3}\pi r^2 y

also we can say

r = \frac{y}{2}

so here we will have

V = \frac{1}{3}\pi (\frac{y}{2})^2y = \frac{1}{12}\pi y^3

now for volume flow rate

Q = \frac{dV}{dt} = \frac{3}{12}\pi y^2\frac{dy}{dt}

Q = \frac{1}{4}\pi y^2 v_y

now plug in all data

Q = \frac{1}{4} \pi (8)^2 (12) ft^3/h

Q = 603.2 ft^3/h

4 0
3 years ago
Para fabricar la bicicleta de un niño pequeño se tiene en cuenta que la fuerza que puede desarrollar es menor que la de un adult
Georgia [21]

Answer:

a) El piñón debe tener 20 dientes.

b) La bicicleta avanza aproximadamente 1,759 metros por cada pedaleada completa.

Explanation:

a) El plato es el engranaje más grande que forma parte del sistema de transmisión, acompañando a la cadena y el piñón integrado a la rueda trasera. Asumiendo que no existen pérdidas por fricción seca y que las condiciones de lubricación del sistema de transmisión son óptimas tal que las pérdidas de potencia son despreciables. Además, supongamos que la bicicleta viaja a velocidad constante, entonces tenemos la siguiente identidad mediante las definiciones de trabajo y potencia:

T_{P}\cdot \omega_{P} = T_{p}\cdot \omega_{p} (1)

Donde:

T_{P} - Torque del plato, en newton-metros.

T_{p} - Torque del piñón, en newton-metros.

\omega_{p} - Rapidez angular del piñón, en radianes por segundo.

\omega_{P} - Rapidez angular del plato, en radianes por segundo.

Sabiendo el hecho que tanto el plato y el piñón experimenta la misma velocidad tangencial, podemos simplificar (1) como sigue:

\frac{T_{P}}{R_{P}} = \frac{T_{p}}{R_{p}} (1b)

Puesto que el radio de cada elemento y el número de dientes son, por separado, directamente proporcionales al número de dientes, modificamos (1b) así y tenemos la siguiente identidad, la cual equivale a su vez a la razón de desarrollo:

\frac{T_{P}}{T_{p}} = \frac{N_{P}}{N_{p}} = \frac{R_{P}}{R_{p}} = \frac{\omega_{p}}{\omega_{P}} (1c)

Donde:

N_{p} - Número de dientes del piñón, sin unidad.

N_{P} - Número de dientes del plato, sin unidad.

Si tenemos que r = 1,4 y N_{P} = 28, entonces tenemos que el número de dientes del piñón es:

r = \frac{N_{P}}{N_{p}}

N_{p} = \frac{N_{P}}{r}

N_{p} = \frac{28}{1,4}

N_{p} = 20

El piñón debe tener 20 dientes.

b) De acuerdo con la relación de desarrollo, por cada revolución realizada por el plato, el piñón realiza 1,4 revoluciones. Entonces, el avance realizado por la rueda trasera (s), en metros, es igual al productor de la relación de desarrollo y la circunferencia de la rueda, es decir:

s = r\cdot 2\pi\cdot R (1)

Donde R es el radio de la rueda trasera, en metros.

Si conocemos que r = 1,4 y R = 0,2\,m, entonces el avance realizado por la rueda trasera es:

s = r\cdot 2\pi\cdot R

s = (1,4)\cdot (2\pi)\cdot (0,2\,m)

s \approx 1,759 \,m

La bicicleta avanza aproximadamente 1,759 metros por cada pedaleada completa.

3 0
3 years ago
A 2.03 kg particle has a velocity (1.90 i - 2.91 j) m/s, and a 3.02 kg particle has a velocity (0.92 i 6.00 j) m/s. Find the x c
hammer [34]

Answer: = (1.31i+2.42j)m/s\\

Explanation:

GIVEN DATA:

m1 = 2.03kg\\m2 = 3.02kg\\v1 = 1.90 i - 2.91 j) m/s\\v2 = (0.92 i -6.00 j) m/s\\

<u><em>Solution:</em></u>

the velocity for centre of the mass

vcm= \frac{m1v1+m2v2}{m1+m2}

input the values into the formula.

vcm=\frac{(2.03)(1.90 i - 2.91 j)+(3.02)(0.92 i -6.00 j) }{2.03+3.02}

open the bracket

= \frac{3.86i-5.91j +2.78i+18.12j}{5.05}

collect like terms

= \frac{6.64i+12.21j}{5.05}

= (1.31i+2.42j)m/s

total momentum

p= (m1+m2)vcm\\= (2.03+3.02) (1.31i+2.42j)\\= 5.05 (1.31i+2.42j)\\=(6.62i+12.22j)kg.m/s

4 0
3 years ago
Drivers must be careful when driving close to cyclists, and should keep at least ____ feet apart when passing cyclists on the ro
True [87]
Usually 3 feet but it depends on the state
4 0
3 years ago
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