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2 years ago

If a car travels 400m in 2o seconds how fast is it going ?

1 answer:

6 0

Assuming that what you typed meant 20 seconds, rather than 2o seconds, the car is travelling at a velocity of 200 meters per second.

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In the following circuit, the supplied voltage is 1.5 volts and the resistor value is 2 ohms. Use Ohm's law to determine the cur

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Answer:

0.75 Amps

Explanation:

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3 years ago

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Gravity is a force that pulls things

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Answer:

down and towards it

Explanation:

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2 years ago

Raw sewage is raised vertically by 5.49m in the amountof

uranmaximum [27]

Answer:

P = 1235.7646 W

Explanation:

Given data:

height of raised sewage = 5.49 m

rate of sewage =1.89*10^6 lt/day

density of sewage = 1.050 kg/m^3

power is written as

$P = \frac{work}{time}$

work = m g h

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h -height

mass lifted per day $= ( 1.89*10^6)(1.050)$

= 1984500 kg

time = 24 hours* 3600 seconds per hour

power $P = \frac{( 1984500)(9.8)( 5.49)}{(24)(3600)}$

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2 years ago

A ball is thrown horizontally from the top of a building 22.3 m high. The ball strikes the ground at a point 127 m from the base

DochEvi [55]

Answer:

t = 2.13 s

Explanation:

given,

height of the building = 22.3 m

horizontal distance = 127 m

acceleration due to gravity = 9.8 m/s²

time for which ball is in motion = ?

using equation of motion

$s = u t + \dfrac{1}{2}gt^2$

initial velocity is zero

$s = \dfrac{1}{2}gt^2$

$t = \sqrt{\dfrac{2s}{g}}$

$t = \sqrt{\dfrac{2\times 22.3}{9.8}}$

t = √4.551

t = 2.13 s

8 0

2 years ago

Se deja caer un objeto desde la cornisa de una casa la cual tarda en llegar al suelo 645/500 segundos. ¿Cúal es la altura de la

salantis [7]

8.15m. La altura de la casa de la cual se deja caer un objeto que tarda en caer $\frac{645}{500}s$ es de 8.15m.

La clave para resolver este problema es mediante caída libre, la velocidad inicial del objeto es 0 por lo que podemos calcular la altura h de la casa mediante la relación $h= \frac{gt^{2}}{2}$ .

Conocemos la gravedad $g=9.8\frac{m}{s^{2}}$ y el tiempo en que tarda en caer el objeto $t=\frac{645}{500}s$ , sustituyendo los valores tenemos que:

$h=\frac{(9.8\frac{m}{s^{2}})(\frac{645}{500}s)^{2}}{2}=8.15m$

4 0

2 years ago