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3 years ago

Write multiples and sub-multiples of second

2 answers:

7 0

Mark Brainliest please

Multiples / submultiples of time

1 day - 24 hours (h)
1 hour (h) - 60 minute (min)
1 minute (min) - 60 second (s)
1 second (s) - 1000 millisecond (ms)
1 milli second - 1000 microsecond (µs)

gogolik [260]3 years ago

3 0

Explanation:

Submultiples Multiples

Value SI symbol Name

10−1 s ds decasecond

10−2 s cs hectosecond

10−3 s ms kilosecond

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A 20 m high filled water tank develops a 0.50 cm hole in the vertical wall near the base. With what speed does the water shoot o

Rina8888 [55]

Answer:

The speed of the water shoot out of the hole is 20 m/s.

(d) is correct option.

Explanation:

Given that,

Height = 20 m

We need to calculate the velocity

Using formula Bernoulli equation

$\dfrac{1}{2}\rho v_{1}^2+\rho gh_{1}=\dfrac{1}{2}\rho v_{2}^2+\rho gh_{2}$

Where,

v₁= initial velocity

v₂=final velocity

h₁=total height

h₂=height of the hole from the base

Put the value into the formula

$v_{1}^2=2g(h_{2}-h_{1})$

$v_{1}=\sqrt{2g(h_{2}-h_{1})}$

$v_{1}=\sqrt{2\times9.8\times(20-0.005)}$

$v_{1}=19.7\ m/s= approximate\ 20\ m/s$

Hence, The speed of the water shoot out of the hole is 20 m/s.

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3 years ago

Two charges q1 and q2 exert a 90 N electrostatic force onto each other when they are 1 m apart. They are moved further away to a

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a 100 kg gymnast comes to a stop after tumbling. her feet do -5000J of net work to stop her. Use the work-kinetic energy theorem

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A projectile is shot directly away from Earth's surface. Neglect the rotation of the Earth. What multiple of Earth's radius RE g

7nadin3 [17]

Answer:

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Here we have escape velocity v $_e$ given by

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Therefore, when the initial speed is 0.241v $_e$ we have

v = $0.241\times \sqrt{\frac{2GM}{R_E} }$ so that;

v² = $0.058081\times {\frac{2GM}{R_E} }$

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From which we get

r = 1.32·R $_E$

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Where the KE = PE required to leave the earth we have

ME = KE - KE = 0

The least initial mechanical energy to leave the earth is zero.

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daser333 [38]

Answer:

I think D sorry if I'm wrong

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Write multiples and sub-multiples of second​

Write multiples and sub-multiples of second