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Julli [10]
3 years ago
5

I’ll mark brainliest

Physics
1 answer:
Flura [38]3 years ago
3 0

Answer:

When the image distance is positive, the image is on the same side of the mirror as the object, and it is real and inverted. When the image distance is negative, the image is behind the mirror, so the image is virtual and upright.

Explanation:

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an object has a velocity of 0.12 rad/s. how many revolutions will the object make after traveling for 30 seconds?
Basile [38]

Answer:

We can write   S = v * t    where S is the distance traveled in time t

S = .12 rad/sec * 30 sec = 3.6 rad     distance traveled

Also 2 * pi * N = S   since there are 2 * pi rad / revolution

So 2 * pi * N = 3.6

N = 3.6 / (2 * pi) = .573 revolutions

7 0
3 years ago
Can someone please give me the answers to this? ... please ...
alexira [117]
3. 2 meters per second 4. i think object 7. i’ll try to figure it out 8. .77 9. 25km 10. 10m each second
7 0
3 years ago
A 1,000 kg car is moving at 20 m/s, and slams into a building before coming to a halt.
ale4655 [162]

Hi there!

We can calculate linear momentum using the following:
\large\boxed{p = m v}

p = linear momentum (kgm/s)
m = mass (kg)
v = velocity (m/s)

Calculate:

p = 1000 * 20 = 20000 kg\frac{m}{s}

Now, we can relate force, time, and momentum with the following:
\large\boxed{I = Ft}\\\\

I = Impulse (kgm/s)
F = Force (N)
t = time (s)

Rearrange to solve for force:
F = \frac{I}{t}

The impulse is equal to the change in momentum. Since the car comes to a halt, all of its momentum is lost, so:

I = \Delta p = p_f - p_i = 0 - 20000 = -20000

Solve:
F = \frac{-20000}{0.5} = \boxed{-40000N}

**Negative force since the positive direction is towards the wall, and the negative direction is away from the wall.

7 0
2 years ago
una bala de 20 g choca con un fango como se muestra en la figura y penetra una distancia de 6 cm antes de detenerse. calcule la
aleksklad [387]

Answer:

A 20g bullet collides with a mud as shown in the figure and penetrates a distance of 6cm before stopping. calculate the braking force f if the input speed was 80m/s

Explanation:

Given that,

A bullet of mass

M = 20g = 0.02kg

The bullet is fired into a mud initially at rest

The bullet penetrate a distance of 6cm in the mud

S = 6cm = 0.06m

The input velocity into the mud is 80m/s, this implies that, the initial velocity is 80m/s

U = 80m/s

So, the bullet stop after a distance of 6cm, so the final velocity is 0m/s

V = 0m/s

So, we need to find the braking force

Breaking force (F) is given as

F = ma

Where m is mass and 'a' is deceleration

So, we need to find the deceleration, using equation of motion

V² = U² + 2as

0² = 80² + 2 × a × 0.06

0 = 6400 + 0.12a

0.12a = -6400

a = -6400 / 0.12

a = - 53,333.33 m/s²

So, the negative sign shows that the bullet is decelerating

So, a = 53,333.33 m/s²

So, breaking force

F = ma

F = 0.02 × 53,333.33

F = 1066.67 N

The breaking force is 1066.67 N

In spanish

Dado que,

Una bala de masa

M = 20 g = 0.02 kg

La bala se dispara en un lodo inicialmente en reposo

La bala penetra una distancia de 6 cm en el barro.

S = 6 cm = 0.06 m

La velocidad de entrada al lodo es de 80 m / s, esto implica que la velocidad inicial es de 80 m / s

U = 80 m / s

Entonces, la bala se detiene después de una distancia de 6 cm, por lo que la velocidad final es de 0 m / s

V = 0 m / s

Entonces, necesitamos encontrar la fuerza de frenado

La fuerza de ruptura (F) se da como

F = ma

Donde m es masa y 'a' es desaceleración

Entonces, necesitamos encontrar la desaceleración, usando la ecuación de movimiento

V² = U² + 2as

0² = 80² + 2 × a × 0.06

0 = 6400 + 0.12a

0.12a = -6400

a = -6400 / 0.12

a = - 53,333.33 m / s²

Entonces, el signo negativo muestra que la bala se está desacelerando

Entonces, a = 53,333.33 m / s²

Entonces, fuerza de ruptura

F = ma

F = 0.02 × 53,333.33

F = 1066.67 N

La fuerza de ruptura es 1066.67 N

7 0
3 years ago
Where are Almost all of the mass of an atom found
Ksju [112]
The nucleus. 
The nucleus contains almost all of the mass as it also contains protons & neutrons of the atom.

Hope this helps!

7 0
4 years ago
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