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3 years ago

The current shape of the solar system is *

Physics

1 answer:

vodomira [7]3 years ago

3 0

B: A spherical, with the objects in the solar system orbiting the suns in all directions

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A 4 cm diameter "bobber" with a mass of 3 grams floats on a pond. A thin, light fishing line is tied to the bottom of the bobber

Tasya [4]

Answer:

Explanation:

Calculate the volume of the lead

$V=\frac{m}{d}\\\\=\frac{10g}{11.3g'cm^3}$

Now calculate the bouyant force acting on the lead

$F_L = Vpg$

$F_L=(\frac{10g}{11.3g/cm^3} )(1g/cm^3)(9.8m/s^2)\\\\=8.673\times 10^{-3}N$

This force will act in upward direction

Gravitational force on the lead due to its mass will act in downward direction

Hence the difference of this two force

$T=mg-F_L\\\\=(10\times10^{-3}kg(9.8m/s^2)-8.673\times 10^{-3}\\\\=8.933\times10^{-3}N$

If V is the volume submerged in the water then bouyant force on the bobber is

$F_B=V'pg$

Equate bouyant force with the tension and gravitational force

$F_B=T_mg\\\\V'pg=\frac{(8.933\times10^{-2}N)+mg}{pg} \\\\V'=\frac{(8.933\times10^{-2}N)+mg}{pg}$

Now Total volume of bobble is

$\frac{V'}{V^B} =\frac{\frac{(8.933\times10^{-2})+Mg}{pg} }{\frac{4}{3} \pi R^3 }\times100\\\\=\frac{\frac{(8.933\times10^{-2})+(3)(9.8)}{(1000)(9.8)} }{\frac{4}{3} \pi (4.0\times10^{-2})^3 }\times100\\\\$

= $\large\boxed{4.52 \%}$

7 0

3 years ago

NET FORCE ( PLEASE ANSWER ASAP )

slava [35]

First picture (black background): 50 Newtons UP

Second picture (white background): 30 Newtons RIGHT

3 0

4 years ago

When an object slides down an inclined plane, the angle between the displacement and the force of gravity is the same as the ang

12345 [234]

Answer:

(d) 14.7 J.

Explanation:

Using the equation,

W = mghsin∅................. equation 1

Where W = work done on the cart by the force of gravity, g = acceleration due to gravity, h = height, ∅ = angle between the displacement and the force of gravity.

Given: m = 2 kg, g = 9.8 m/s², h = 1.5 m, ∅ = 30°

Substitute into equation 1

W = 2(9.8)(1.5)sin30

W = 2×9.8×1.5×0.5

W = 14.7 J.

The right option is (d) 14.7 J

5 0

3 years ago

Um ônibus percorre a distância de 480 km, entre Santos e Curitiba, com velocidade escalar média de 80 km/h. De Curitiba a Floria

Mariulka [41]

Answer:

10 h

Explanation:

velocidade é a taxa de variação da distância no tempo. é a razão entre a distância e o tempo

de Santos e Curitiba:

distância (d) de 480 km, velocidade (s) de 80 km/h

$s=\frac{d}{t}\\ t=\frac{d}{s} =\frac{480}{80}=6h$

de Curitiba e Florianópolis:

distância (d) de 300 km, velocidade (s) de 75 km/h

$s=\frac{d}{t}\\ t=\frac{d}{s} =\frac{300}{75}=4h$

tempo médio de ônibus entre Santos e Florianópolis = 6h + 4h = 10h

7 0

3 years ago

Read 2 more answers

Ignoring the mass of the spring, a 5 kg mass hanging from a coiled spring having a constant k= 50 N/m will have a period of osci

Marrrta [24]

Answer:

Period of oscillation, T = 2 sec

Explanation:

It is given that,

Mass of the object, m = 5 kg

Spring constant of the spring, k = 50 N/m

This object is hanging from a coiled spring. We need to find the period of oscillation of the spring. The time period of oscillation of the spring is given by :

$T=2\pi\sqrt{\dfrac{m}{k}}$

$T=2\pi\sqrt{\dfrac{5\ kg}{50\ N/m}}$

T = 1.98 sec

T = 2 sec

So, the period of oscillation is about 2 seconds. Hence, this is the required solution.

4 0

3 years ago