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2 years ago

What is the importance of measurement?

Physics

1 answer:

Kruka [31]2 years ago

8 0

Answer:

To know the time ,length area

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Which of the following is a simple machine? A. wedge B. meat grinder C. car D. bicycle

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I think the answer is D. Bicycle

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2 years ago

Why do scientists believe that dark matter exists even though it cannot be seen?

poizon [28]

Because although they cannot see it, they can see it's influence on objects that can be seen, and it's effects.

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2 years ago

b. What would the momentum be if the mass of the bowling ball were doubled and its velocity still was 3 m/s?

umka2103 [35]

Answer:

Twice.

Explanation:

The momentum of an object is given by :

p = mv

Where

m is mass and v is the velocity

If the mass of the ball were doubled, m'=2m and v'=v=3 m/s

New momentum,

p'=m'v'

p'=2m × v

p'=2mv

p'=2p

So, the new momentum becomes twice the initial momentum.

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1 year ago

A circular loop of radius 0.0400 m is

Alenkinab [10]

Let's see

Find enclosed area of loop

$\\ \rm\dashrightarrow \pi r^2$

$\\ \rm\dashrightarrow 3.14(0.04)^2$

$\\ \rm\dashrightarrow 0.005m^2$

Now

$\\ \rm\dashrightarrow \phi=BAcos\theta$

We need B

$\\ \rm\dashrightarrow 9.59\times 10^{-7}=B(0.005)cos75$

$\\ \rm\dashrightarrow 9.59\times 10^{-7}=0.0046B$

$\\ \rm\dashrightarrow B=2084.78\times 10^{-7}$

$\\ \rm\dashrightarrow B=2.08\times 10^{-4}T$

$\\ \rm\dashrightarrow B=0.208mT$

4 0

1 year ago

Two diodes are in series. The first diode has a voltage of 0.75 V and the second has a voltage of 0.8 V. If the current through

tensa zangetsu [6.8K]

The current in the second diode is 400mA

Data;

First Voltage = 0.75V
Second Voltage = 0.8V
First Current (I) = 400mA
Second Current(I) = ?

<h3>Current In a Series</h3>

The current in the first diode is equal to 400mA. In a series circuit, the current passing the diodes are equal. This implies that the current in the series are equal.

Diodes connected in series will be the equal.

$I_1 = I_2$

Since I1 is 400mA, I2 will be equal to 400mA

$I_1 = I_2\\I_1 = 400mA\\I_2 = 400mA$

The current in the second diode is 400mA

Learn more on current in a diode here;

brainly.com/question/1455378

6 0

1 year ago

What is the importance of measurement? ​

What is the importance of measurement?