When iron rusts, iron atoms are destroyed true or false?

A bungee jumper attains a speed of 30 m/s just as the bungee cord begins to stretch. If the period of stretch is 2 s while comin

Bogdan [553]

Answer: $1.53g$

Explanation:

average deceleration= ?

inial velocity: $u=0$

final velocity: $v=30m/s$

time: $t=2seconds$

The first law of kinematics :

$v=u+at$

find a the subject of the formula

$a=v-u/ t$

$a=\frac{0-30} 2$

$a=-30/2$

$a=-15m/s^{2}$

The deceleration about g(acceleration due to gravity) will be:

$15/9.8$

$1.53g$

4 0

3 years ago

a plane is flying due east in still air at 395 km/h. suddenly, the plane is hit by wind blowing at 55km/h toward the west. what

Sphinxa [80]

Let's be clear: The plane's "395 km/hr" is speed relative to the
air, and the wind's "55 km/hr" is speed relative to the ground.

Before the wind hits, the plane moves east at 395 km/hr relative
to both the air AND the ground.

After the wind hits, the plane still maintains the same air-speed.
That is, its velocity relative to the air is still 395 km/hr east.
But the wind vector is added to the air-speed vector, and the
plane's velocity <span>relative to the ground drops to 340 km/hr east</span>.

6 0

4 years ago

A 1300-turn coil of wire that is 2.4cm in diameter is in a magnetic field that drops from 0.15T to 0 T in 12ms . The axis of the

krek1111 [17]

The emf induced in the coil at the given magnetic field strength is 4.53 V.

<h3>what is mangetic field?</h3>

magnetic field is a type of field where all things use for magnesium.

The given parameters;

number of turns, N = 1300 turns

diameter of the coil, d = 2.2 cm

initial magnetic field, B₁ = 0.11 T

final magnetic field, B₂ 0