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3 years ago

How many significant figures does 0.09164500561 have?

Physics

1 answer:

kolbaska11 [484]3 years ago

7 0

Answer:

10 Sig Figs

Explanation:

Just start counting at the first non zero after the decimal so in this case the nine, and count all of the numbers including zeros after that.

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A small first-aid kit is dropped by a rock climber who is descending steadily at 1.9 m/s. After 2.4 s, what is the velocity of t

Genrish500 [490]

Answer:

$v=-21.65 m/s$

Explanation:

From the exercise we have:

$v_{o}=1.9m/s\\ g=9.81 m/s^{2}\\ t=2.4s$

To find the velocity after 2.4s we need to use the following formula:

$v=v_{o}+gt$

$v=1.9m/s-(9.81m/s^{2})(2.4s)=-21.65m/s$

The negative sign means that the kit is going down.

6 0

2 years ago

Read 2 more answers

What do you mean by mechanical advantage is 2.5 of a machine?

BigorU [14]

Answer:

If you are using a machine that has a mechanical advantage of 2.5,you will have increased your EFFORT DISTANCE by 2.5 times. This allows you to REDUCE the EFFORT FORCE needed by 2.5 times.

3 0

3 years ago

What is normalization

tatuchka [14]

Answer:

Normalization is a systematic approach of decomposing tables to eliminate data redundancy. It is a multi-step process that puts data into tabular form, removing duplicated data from the relation tables.

Explanation:

7 0

3 years ago

Read 2 more answers

Which of the following requirements must be present to hear a sonic boom?

Lorico [155]

Answer:

D) The velocity of the airplane must be greater than the speed of sound

Explanation:

Sonic boom is a phenomenon that occurs when an airplane travels ay a velocity greater than the speed of sound.

When this condition is met, the sound waves produced by the airplane (mainly from the engine) is not able to travel ahead of the plane, because the plane is moving at a greater speed than the sound itself; as a result, it is only transmitted behind the plane.

In this situation, a shock wave is produced. This shock wave is associated with a very loud "bang", that can be heard clearly even at several kilometers distance (in fact, supersonic planes are normally not allowed to fly over residential areas. In the past, for example the Concorde, was only allowerd to fly at supersonic speed over the ocean).

So the correct answer is

D) The velocity of the airplane must be greater than the speed of sound

6 0

2 years ago

An ice skater performs a pirouette (a fast spin) by pulling in his outstretched arms close to his body. What happens to his rota

Afina-wow [57]

Answer:

rotational kinetic energy increases

Explanation:

when an ice skater pulls his arms closer to his body there is no rotational torque because we know that torque = F×R here R is the distance and when arms are closer to body distance is very less so there will be no torque and so angular momentum is conserved but moment of inertia is also decreases and we know that rotational kinetic energy = $\frac{L^{2}}{2I}$

where L= angular momentum

I = moment of inertia

as moment of inertia decreases and angular momentum is conserved so using the formula rotational kinetic energy increases

5 0

3 years ago