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Brut [27]
3 years ago
11

Can someone please explain the last question?​

Physics
1 answer:
gregori [183]3 years ago
4 0

Answer:

1666.67

Explanation:

1/2 x K x e^2.

1/2 x 1666.67 x 0.276^2

63.48 J

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The shape of a planet's orbit is influenced by gravity.
stiks02 [169]

Answer:

True

Explanation:

Gravity is a very important force. Every object in space exerts a gravitational pull on every other, and so gravity influences the paths taken by everything traveling through space. It is the glue that holds together entire galaxies. It keeps planets in orbit.

6 0
3 years ago
Read 2 more answers
Un movil de masa 12Kg sobre el cual estan actuando varias fuerzas F_1=48N, F_2=60N y F_3=30N Calcular la aceleracion con la cual
Nikitich [7]

Answer:

Lamentablemente el problema está incompleto, pues no sabemos la dirección en la que se aplican las fuerzas. Por ello, voy a resolver el problema asumiendo dos casos. (abajo se puede ver una imagen donde se describe cada caso)

1) Todas las fuerzas están en la misma dirección.

Entonces la fuerza neta será la suma de las 3 fuerzas, entonces:

F = 48N + 60N + 30N = 138N

Y por la segunda ley de Newton sabemos que:

F = m*a

fuerza igual a masa por aceleración.

Entonces la aceleración está dada por:

a = F/m = 138N/12kg = 11.5 m/s^2

2) Segundo caso, suponemos que F1 es opuesta a F2 y F3

En este caso, la fuerza neta será:

F = F2 + F3 - F1 = 60N + 30N - 48N = 42N

En este caso, la aceleración será:

a = 42N/12kg = 3.5 m/s^2

7 0
3 years ago
A 87 kgkg skydiver can be modeled as a rectangular "box" with dimensions 18 cmcm ×× 47 cmcm ×× 180 cmcm . If he falls feet first
garik1379 [7]

Answer:

Therefore the terminal velocity = 1.45 m/s

Explanation:

Terminal velocity: Terminal velocity is the highest velocity of an object when it falls from rest trough a media.

V_t=\sqrt{\frac{2w}{c_d\rho A}}

V_t= terminal velocity

w = weight of the object = mg

c_d = drag coefficient=0.80

A= frontal area

\rho = media density = 1.2 kg/m³

m = mass = 8 kg

g= acceleration due to gravity = 9.8 m/s²

Front area = length× breadth

                 = (18×47)cm²

                 =846 cm²

Therefore the terminal velocity

v_t= \sqrt{\frac{2\times 87\times 9.8}{0.80\times 846 \times 1.2}

    =1.45 m/s

Therefore the terminal velocity = 1.45 m/s

8 0
4 years ago
An ocean wave has a speed of 36 m/s and a frequency of 3 Hz.<br> What is its wavelength?
dsp73

Answer:

f=4Hz

Explanation:

frequency of a wave if it has a wavelength of 3.0 m and a wave speed of 12m/s

v=fλ → f=v/λ

f=12/3

f=4Hz

6 0
3 years ago
A racecar is equipped with a computer that records the reading on its speedometer every second during a race. If you graph this
Westkost [7]
Since the device is a speedometer, the data it read is the speed of the racecar. Data recording involving time usually uses time as the independent variable. It was also said in the problem that it records the speed every second which shows that the time interval is constant. This means that only other data, the car's speed, is the dependent variable.
6 0
3 years ago
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