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3 years ago

Which of the following has the highest viscosity?

Physics

2 answers:

Bas_tet [7]3 years ago

7 0

Answer: Option (a) is the correct answer.

Explanation:

When a fluid opposes or resists to flow then this property is known as viscosity.

A corn syrup has strong cohesive forces which means that particles of corn syrup are closely attached to each other. Due to these strong cohesive forces an internal friction will develop which will resist the flow of syrup.

Whereas there are no cohesive forces in milk , water, and orange juice. Thus, they can flow easily without any resistance.

Therefore, we can conclude that out of the given options, corn syrup has the highest viscosity.

lidiya [134]3 years ago

4 0

The answer is Corn Syrup

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Mateo and Jackie were on a playground rolling some different-sized balls to get them to crash. They used a tennis ball (the same

creativ13 [48]

Answer:

In crash one, because the pink soccer ball had more mass, so it would have a stronger force.

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3 years ago

A tradesman sharpens a knife by pushing it with a constant force against the rim of a grindstone. The 30-cm-diameter stone is sp

Lorico [155]

Answer:

a. 0.21 rad/s2

b. 2.205 N

Explanation:

We convert from rpm to rad/s knowing that each revolution has 2π radians and each minute is 60 seconds

200 rpm = 200 * 2π / 60 = 21 rad/s

180 rpm = 180 * 2π / 60 = 18.85 rad/s

r = d/2 = 30cm / 2 = 15 cm = 0.15 m

a)So if the angular speed decreases steadily (at a constant rate) from 21 rad/s to 18.85 rad/s within 10s then the angular acceleration is

$\alpha = \frac{\Delta \omega}{\Delta t} = \frac{21 - 18.85}{10} = 0.21 rad/s^2$

b) Assume the grind stone is a solid disk, its moment of inertia is

$I = mR^2/2$

Where m = 28 kg is the disk mass and R = 0.15 m is the radius of the disk.

$I = 28*0.15^2/2 = 0.315 kgm^2$

So the friction torque is

$T_f = I\alpha = 0.315*0.21 = 0.06615 Nm$

The friction force is

$F_f = T_f/R = 0.06615 / 0.15 = 0.441 N$

Since the friction coefficient is 0.2, we can calculate the normal force that is used to press the knife against the stone

$N = F_f/\mu = 0.441/0.2 = 2.205 N$

7 0

3 years ago

Which statement is true about an object that sinks in water?

Rina8888 [55]

A > Is the correct answer :)

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3 years ago

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viktelen [127]

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3 years ago

2. A 50 kg diver is standing on the edge of a 15 m high cliff. What is his potential energy?

Lera25 [3.4K]

Answer:

3675 J

Explanation:

Gravitational Potential Energy = $\frac{1}{2}$ × mass × g × height

( g is the gravitation field strength )

Mass = 50 kg

G = 9.8 N/kg ( this is always the same )

Height = 15 m

Gravitational Potential Energy = $\frac{1}{2}$ × 50 ×9.8 × 15

= 3675 J

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3 years ago