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3 years ago

What is the ratio of magnitudes of their angular velocities, ω1/ω2? express your answer in terms of the variables r1 and r2?

1 answer:

8 0

<span>We are using the formula: v = rĎ‰ Please consider that they have the same tangential velocity at their edges. Therefore we can equate: r1 Ď‰1 = r2 Ď‰2 And re-arrange: Ď‰1 / Ď‰2 = r2 / r1</span>

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If a body has 60N weight what will be its mass on moon

zvonat [6]

If the object weighs 60N on Earth, then its mass is 6.12 kilograms.

If it weighs 60N on the moon, then its mass is 36.97 kilograms.

Whatever its mass is in one place, it has the same mass in any other place. Mass doesn't depend on location, but weight does.

8 0

3 years ago

Read 2 more answers

An 80-kg firefighter slides down a fire pole. After 1.3 seconds of sliding, the firefighter is sliding at a velocity of 6.5 m/s,

yuradex [85]

Answer:

a= 0

Explanation:

In the vertical direction, if the friction force (directed upward) is equal to the force of gravity (downward) this means that no net force is acting on the firefighter.
According to Newton's 2nd Law, if no net force is present, the acceleration in this direction is just zero, as follows:

$F_{net} = m*a = 0 (1)$

⇒ a = 0

5 0

2 years ago

As Merrill watches his finger with both eyes open as he brings his finger closer to his nose, he feels his eye muscles working.

charle [14.2K]

Answer:

Answered

Explanation:

As Merrill watches his finger with both eyes open as he brings his finger closer to his nose, he feels his eye muscles working. This shows that her eyes Muscles have both accommodation and convergence.

Accommodation and convergence allows us to view objects both near and at far without double vision.

4 0

2 years ago

A convex lens with focal length 9 cm forms an image of an object placed 21 cm to the left of the lens. what is the distance to t

bixtya [17]

Answer:

15.75 cm

Explanation:

focal length of convex lens, f = + 9 cm

position of object, u = - 21 cm

Let the distance of image is v.

Use lens equation

1 / f = 1 / v - 1 / u

1 / 9 = 1 / v + 1 / 21

1 / v = 1 / 9 - 1 / 21 = (21 - 9) / (21 x 9)

1 / v = 12 / 189

v = 15.75 cm

8 0

2 years ago

A 75-hp compressor in a facility that operates at full load for 2500 h a year is powered by an electric motor that has an effici

stealth61 [152]

Answer:

$C = 16544.35\, USD$

Explanation:

The annual electricity cost is:

$C = (\frac{1}{0.93} )\cdot(75\, h.p.)\cdot(0.746\, kW)\cdot(2500\,h)\cdot(\frac{3600\,s}{1\,h} )\cdot(\frac{1\,kWh}{3600\,kJ} )\cdot (0.11\,\frac{USD}{kWh} )$

$C = 16544.35\, USD$

3 0

3 years ago