All categories

3 years ago

Will give correct answer brainliest please help

Physics

1 answer:

ikadub [295]3 years ago

6 0

Answer:

it is the 3rd answer choice

You might be interested in

Determine the force of gravity on a 1600 kg spaceship: near the surface of the Moon.

Umnica [9.8K]

Answer:

yahoo has the answer im telling you

Explanation:

3 0

3 years ago

If element x has 94 protons how many electrons does it have

Igoryamba

94 electrons. protons and electrons are always the same, but neutrons are different.

8 0

3 years ago

Read 2 more answers

What does it mean when work is positive?

Degger [83]

Answer:

To have a positive job, the two vectors must have the same direction

Explanation:

Work is a scalar defined as the scalar product of two vectors, the froce and the displacement. To have a positive job, the two vectors must have

collinear and that their arrows point in the same direction.

You can also appreciate this from the work equation

W = F. r

bold indicate vector

W = F r cos θ

With θ the angle between force and displacement

7 0

3 years ago

A trap-jaw ant snaps its mandibles shut at very high speed, a good trait for catching small prey. But an ant can also slam its m

irakobra [83]

Answer:

v = 0.509 m/s

Explanation:

Given that,

Mass of the ant, $m = 12\ mg = 1.2\times 10^{-5}\ kg$

Force exerted, $F = 47\ mN = 0.047\ N$

Time, $t=0.13\ ms=0.00013\ s$

To find,

Speed with which it leave the ground.

Solution,

The change in momentum is equal to the product of force and time as :

$F\times t=m(v-u)$

Since, u = 0

$F\times t=mv$

$v=\dfrac{Ft}{m}$

$v=\dfrac{0.047\ N\times 0.00013\ s}{1.2\times 10^{-5}\ kg}$

v = 0.509 m/s

So, the speed with which it will leave the ground is 0.509 m/s.

3 0

3 years ago

If an electric current of 8.50 A flows for 3.75 hours through an electrolytic cell containing copper-sulfate (CuSO4) solution, t

muminat

Answer:

75.5g

Explanation:

From the ionic equation, we can write

$CU^{2+}+SO^{2-}_{4}\\$

next we find the number of charge

Note Q=it

for i=8.5A, t=3.75 to secs 3.75*60*60=13500secs

hence

$Q=8.5*13500\\Q=114750C$

Since one faraday represent one mole of electron which equal 96500C

Hence the number of mole produced by 114750C is

114750/96500=1.2mol

The mass of copper produced is

$mol=\frac{mass}{molar mass} \\mass=mole*molar mass\\mass=1.2*63.5\\mass=75.5g$

Hence the amount of copper produced is 75.5g

7 0

4 years ago

Read 2 more answers