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3 years ago

How was the lunar regolith formed?

1 answer:

7 0

It is formed by the impact of meteorites on the body’s surface. The force of the collision melts some of the impacted regolith to form objects.

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The normal force equals the magnitude of the gravitational force as a roller coaster car crosses the top of a 40-m-diameter loop

iogann1982 [59]

Answer:

Explanation:

Given

Diameter $d=40\ m$

radius $r=20\ m$

From diagram, at top point

If Normal force is equal to Gravitational force

$N=mg$

where N=normal reaction

m=mass of car

Normal reaction will provide centripetal force

$N=\frac{mv^2}{r}$

thus

$\frac{mv^2}{r}=mg$

$v=\sqrt{2gr}$

$v=\sqrt{2\times 9.8\times 20}$

$v=19.79\ m/s$

5 0

3 years ago

A uniform, 0.0300-kg rod of length 0.400 m rotates in a horizontal plane about a fixed axis through its center and perpendicular

AURORKA [14]

Answer:

A) ω₂ = 28 rev/min

B) ω_3 = 28 rev/min

Explanation:

A) Initial moment of inertia (I₁) is the rod's own ((1/12)ML²) plus that of the two rings (two lots of mr² if we treat each ring as a point mass).

Thus;

I₁ = ((1/12)ML²) + 2(mr²)

Where;

M is mass of rod = 0.03 kg

L is length of rod = 0.4m

m is mass of small rings = 0.02 kg

r is radius of small rings = 0.05 m

Thus;

I₁ = ((1/12) x 0.03 x 0.4²) + 2(0.02 x 0.05²)

I₁ = 0.0021 kg.m²

Now, when the rings slide and reach the ends of the rod i.e at r = L/2 = 0.4/2 = 0.2m from axis, the new Moment of inertia is;

I₂ = ((1/12) x 0.03 x 0.4²) + 2(0.02 x 0.2²)

I₂ = 0.0036 kg.m²

From conservation of angular momentum, we know that:

I₁ω₁ = I₂ω₂

We are given ω₁ = 48 rev/min.

Thus; plugging in the relevant values;

0.0021 x 48 = 0.0036ω₂

0.1008 = 0.0036ω₂

ω₂ = 0.1008/0.0036

ω₂ = 28 rev/min

b) For this, we have the same scenario as the case above where the ring just reaches the ends of the rods.

Thus,

I₂ω₂ = I_3•ω_3

So,0.0021 x 48 = 0.0036ω_3

ω_3 = 28 rev/min

7 0

3 years ago

A shot-putter exerts an unbalanced force of 128 N on a shot giving it an acceleration of 19

IRISSAK [1]

Answer:

128 is the ans cuz N is also lnown as mass

Explanation:

128

6 0

3 years ago

A proton moves with a speed of 1.17 105 m/s through Earth's magnetic field, which has a value of 50.0 µT at a particular locatio

vlabodo [156]

a) Southward you need to apply right hand rule. If you close your hand to the east, your thumb will indicate south.

b) Given the equation for Magnetic Force

$F= qVB$

Replacing

$F= (1.16*10^{-19})(1.17*10^5)(50*10^{-6})$

$F=9.36*10^{-19}$

c) Given the second Newton's Law by

$F_g = 1.67*10^{-27}*9.81$

$F_g = 1.64*10^{-26}$

Given the electric force by,

$F_e = 1.6*10^{-19}*1.5*10^2$

$F_e = 2.4*10^{-17}N$

$F=9.36*10^{-19}N$

7 0

3 years ago

a boy looks at the reflection of his digital watch in a plane mirror and thinks the time is 10:11. what is the correct time?

Gekata [30.6K]

Answer:

11:10 will be the time. reflection causes the object to be flipped when you see its image at the mirror

6 0

3 years ago