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4 years ago

Brendan drew a diagram to illustrate the centripetal force acting on a satellite.

Physics

2 answers:

sdas [7]4 years ago

6 0

Answer:

Change the Fg = Fc vector so it is perpendicular to the v vector.

Explanation:

Brendan drew a diagram to illustrate the centripetal force acting on a satellite. When satellite rotates around a earth, the centripetal force is balanced by gravitational force such that,

$\dfrac{mv^2}{r}=G\dfrac{Mm}{r^2}$

Centripetal force is a type of force which is responsible for the motion of an object in a circular path. It is a center seeking force. If the centripetal force is absent, the satellite would move in a straight line. It is perpendicular to the velocity of satellite.

Hence, the correct option is (d) "Change the Fg = Fc vector so it is perpendicular to the v vector".

harina [27]4 years ago

4 0

Brendan drew a diagram to illustrate the centripetal force acting on a satellite.

How can Brendan correct his diagram?

Draw the Fg = Fc vector so it points at a 45° angle from the v vector.

Change the Fg = Fc vector label so it reads Fa = Fc.

Draw the Fg = Fc vector so it is longer than the v vector.

Change the Fg = Fc vector so it is perpendicular to the v vector.

D is the answer

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In your research lab, a very thin, flat piece of glass with refractive index 1.20 and uniform thickness covers the opening of a

liraira [26]

Answer:

(a). The thickness of the glass is 868 nm.

(b). The wavelength is 3472 nm.

Explanation:

Given that,

Refractive index = 1.20

Wavelength = 496 nm

Next wavelength = 386 nm

We need to calculate the thickness of the glass

Using formula for constructive interference

$2nt=(m+\dfrac{1}{2})\lambda$

Put the value into the formula

In first case,

$2nt=(m+\dfrac{1}{2})496$ .....(I)

In second case,

$2nt=(m+1+\dfrac{1}{2})386$

$2nt=(m+\dfrac{3}{2})386$ .....(II)

From equation (I) and (II)

$(m+\dfrac{1}{2})496=(m+\dfrac{3}{2})386$

$110m=336$

$m=3.0$

Put the value of m in equation (I)

$2nt=(2+\dfrac{1}{2})496$

$t=\dfrac{(3+\dfrac{1}{2})496}{2\times1}$

$t=868\ nm$

The thickness of the glass is 868 nm.

(b). We need to calculate the wavelength

Using formula of constructive interference

$2nt=(m+\dfrac{1}{2})\lambda$

$\lambda=\dfrac{2nt}{(m+\dfrac{1}{2})}$

Put the value into the formula

$\lambda=\dfrac{2\times1\times868}{\dfrac{1}{2}}$

$\lambda=3472\ nm$

Hence, (a). The thickness of the glass is 868 nm.

(b). The wavelength is 3472 nm.

8 0

4 years ago

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

oe finds that the temperature of a substance is 12 degrees Celsius. What does this tell Zoe about the substance? Its internal en

Roman55 [17]

Its internal energy is less than 12 degrees

5 0

3 years ago

Read 2 more answers

how much centripetal force is needed to make a body of mass 0.5 kg to move in a circle of radius 50 cm with a speed 3ms-1

Alex17521 [72]

Answer:

9 N

Explanation:

The centripetal force F is F = mrω^2 = (mv^2)/r where m is mass, r is radius of the curve, ω is angular velocity and v is tangential velocity.

In this case, m = 0.5kg, r = 0.5m, v = 3m/s

So F = [0.5kg(3m/s)^2]/0.5m = 9kg-m/s^2 which is 9N

6 0

3 years ago

Read 2 more answers

An airplane flies with a constant speed of 720 km/hr. How long will it take to travel a distance of 1440 km? Please show your wo

choli [55]

Answer:

2 h

Explanation:

Velocity =Distance/time ⇒ time = distance/speed

= 1440/720

= 2 h

6 0

3 years ago