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horsena [70]
3 years ago
9

What is the measurement 111.009 mm rounded off to four significant digits?

Physics
1 answer:
dedylja [7]3 years ago
4 0
111.0 because 111.009 rounds off to 111.01, thus rounding again off to 111.0
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A clay vase on a potter's wheel experiences an angular acceleration of 5.69 rad/s2 due to the application of a 16.0-n m net torq
Digiron [165]
The equivalent of the Newton's second law for rotational motions is:
\tau = I \alpha
where
\tau is the net torque acting on the object
I is its moment of inertia
\alpha is the angular acceleration of the object.

Re-arranging the formula, we get
I= \frac{\tau}{\alpha}
and since we know the net torque acting on the (vase+potter's wheel) system, \tau=16.0 Nm, and its angular acceleration, \alpha = 5.69 rad/s^2, we can calculate the moment of inertia of the system:
I= \frac{\tau}{\alpha}= \frac{16.0 Nm}{5.69 rad/s^2} =2.81 kg m^2
8 0
3 years ago
Real-world efficiencies are generally very high, in the 90 percent range. Please select the best answer from the choices provide
Vesna [10]

Answer:

i think it truth

Explanation:

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Suppose that in a lightning flash the potential difference between a cloud and the ground is 1.3×109 V and the quantity of charg
Georgia [21]

Answer:

A) ΔU = 3.9 × 10^(10) J

B) v = 8420.75 m/s

Explanation:

We are given;

Potential Difference; V = 1.3 × 10^(9) V

Charge; Q = 30 C

A) Formula for change in energy of transferred charge is given as;

ΔU = QV

Plugging in the relevant values gives;

ΔU = 30 × 1.3 × 10^(9)

ΔU = 3.9 × 10^(10) J

B) We are told that this energy gotten above is used to accelerate a 1100 kg car from rest.

This means that the initial potential energy will be equal to the final kinetic energy since all the potential energy will be converted to kinetic energy.

Thus;

P.E = K.E

ΔU = ½mv²

Where v is final velocity.

Plugging in the relevant values;

3.9 × 10^(10) = ½ × 1100 × v²

v² = [7.8 × 10^(8)]/11

v² = 70909090.9090909

v = √70909090.9090909

v = 8420.75 m/s

4 0
3 years ago
The first element on the periodic table is<br> Answer here
Gwar [14]

Answer:

Hydrogen

Explanation:

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Murljashka [212]

Answer:

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When that happens, pepsin is maximally active and works on a fully digestion of the presented protein.

On the other hand HCI prevents the activeness of the amylase, thereby only a small part of starch is digested.

Explanation:

The physiological significance of these effects are: salivary glands found in the mouth which has a neutral pH environment segregates amylase, meanwhile pepsinogen becomes pepsin thanks to the compatibility with this environment.

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3 years ago
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