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3 years ago

What is always included in a comparative investigation?

Physics

2 answers:

12345 [234]3 years ago

5 0

Answer:

A comparison is always included in a comparative investigation. Comparative investigation collects data about different objects, features, organisms, sometimes under a different set of conditions to compare them. The similarities and differences that occur during a set of time or conditions are observed and compared.

Explanation:

iragen [17]3 years ago

4 0

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By means of a rope whose mass is negligible, two blocks are suspended over a pulley, as the drawing shows, with m1 = 12.1 kg and

puteri [66]

Answer:

14.8 kg

Explanation:

We are given that

$m_1=43.7 kg$

$m_2=12.1 kg$

$g=9.8 m/s^2$

$a=\frac{1}{2}(9.8)=4.9 m/s^2$

We have to find the mass of the pulley.

According to question

$T_2-m_2 g=m_2 a$

$T_2=m_2a+m_2g=m_2(a+g)=12.1(9.8+4.9)=177.87 N$

$T_1=m_1(g-a)=43.7(9.8-4.9)=214.13 N$

Moment of inertia of pulley= $I=\frac{1}{2}Mr^2$

$(T_2-T_1)r=I(-\alpha)=\frac{1}{2}Mr^2(\frac{-a}{r})=\frac{1}{2}Mr(-4.9)$

Where $\alpha=\frac{a}{r}$

$(177.87-214.13)=-\frac{1}{2}(4.9)M$

$-36.26=-\frac{1}{2}(4.9)M$

$M=\frac{36.26\times 2}{4.9}=14.8 kg$

Hence, the mass of the pulley=14.8 kg

6 0

3 years ago

A particle in circular motion performs 30 oscillation in 6 seconds. what is it angular velocity

sp2606 [1]

Explanation:

ω = 30 rev × (2π rad/rev) / (6 sec)

ω = 10π rad/s

ω ≈ 31.4 rad/s

4 0

3 years ago

Earth turns on its axis about once every 24 hours. The Earth's equatorial radius is 6.38 x 106 m. If some catastrophe caused Ear

san4es73 [151]

To solve this problem it is necessary to apply the concepts related to the Period of a body and the relationship between angular velocity and linear velocity.

The angular velocity as a function of the period is described as

$\omega = \frac{2\pi}{T}$

Where,

$\omega =$ Angular velocity

T = Period

At the same time the relationship between Angular velocity and linear velocity is described by the equation.

$v = \omega r$

Where,

r = Radius

Our values are given as,

$T = 24 hours$

$T = 24hours (\frac{3600s}{1 hour})$

$T = 86400s$

We also know that the radius of the earth (r) is approximately

$6.38*10^6m$

Usando la ecuación de la velocidad angular entonces tenemos que

$\omega = \frac{2\pi}{T}$

$\omega = \frac{2\pi}{86400}$

$\omega = 7.272*10^{-5}rad/s$

Then the linear velocity would be,

$v = \omega *r$

x $v = \omega *r$

$v= 463.96m/s$

The speed would Earth's inhabitants who live at the equator go flying off Earth's surface is 463.96

3 0

3 years ago

When the force applied to an object increases, the motion of the object

Elza [17]

Answer:

Semen is the most important thing in the life cycle of life

6 0

4 years ago

If all else stays the same, which would cause an increase in the gravitational force on a space shuttle?

maks197457 [2]

"decreasing the distance of the space shuttle from Earth"

F = Gm(1)m(2)/R²
where R is the distance between the 2 objects, as it decreases, the force increases.

5 0

4 years ago

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