All categories

3 years ago

Why should people pay attention to scientists when making decisions?

Physics

1 answer:

Vesna [10]3 years ago

6 0

Answer:

Explanation:

All the other answers are false scientist make frequent mistake in there hypothesis B. is a opinion so is C

And a scientist job is to study and OBSERVE a field of science

You might be interested in

A light bulb is connected to a 120.0-V wall socket. The current in the bulb depends on the time t according to the relation I =

kykrilka [37]

a) Frequency: 62.7 Hz

b) Resistance: $186.3\Omega$

c) Average power: 38.6 W

Explanation:

An alternating current can be written in the form

$I(t)=I_0 sin(\omega t)$

where

$I_0$ is the maximum current in the bulb

$\omega=2\pi f$ (1) is the angular frequency, where f is the frequency

t is the time

Here the current in the bulb is

$I(t)=(0.644 A)(sin (394 rad/s\cdot t)$

This means that

$\omega=394 rad/s$

And therefore by using formula (1), we can find the frequency:

$f=\frac{\omega}{2\pi}=\frac{394}{2\pi}=62.7 Hz$

The resistance of the bulb's filament can be found by using Ohm's law:

$V=RI$

where

V is the voltage

R is the resistance

I is the current

Here we have:

$V_0 = 120.0 V$ (maximum voltage)

$I_0 = 0.644 A$ (maximum current)

Therefore, the resistance of the bulb is

$R=\frac{V_0}{I_0}=\frac{120}{0.644}=186.3 \Omega$

In this circuit, the average power delivered to the light bulb is equal to the average power dissipated by the resistor.

For an AC circuit, the average power dissipated on a resistor is given by

$P=I_{rms}^2 R$

where

$I_{rms}$ is the rms current

The rms current can be calculated as

$I_{rms}=\frac{I_0}{\sqrt{2}}$

where in this case

$I_0 =0.644 A$ is the peak current

Here the resistance is

$R=186.3 \Omega$

Therefore, the average power is:

$P=(\frac{I_0}{\sqrt{2}})^2R=(\frac{0.644}{\sqrt{2}})^2(186.3)=38.6 W$

Learn more about current and resistance:

brainly.com/question/4438943

brainly.com/question/10597501

brainly.com/question/12246020

#LearnwithBrainly

5 0

3 years ago

4) The components of Vector A are given as follows Ax = -2.4 Ay = + 3.8 What is the magnitude of the A, and what is the angle th

Monica [59]

Answer:

A = 4.49

α = 57.72°

Explanation:

Knowing the magnitude of x & y of a vector we can determine the total magnitude of a vector.

$A=\sqrt{A_{x}^{2} +A_{y}^{2} } \\A=\sqrt{(2.4)^{2} +(3.8)^{2} }\\A=4.49$

The angle tangent can be used to determine the angle.

$tan(\alpha )=\frac{3.8}{2.4}\\tan(\alpha ) =1.5833\\\alpha =tan^{-1}(1.5833) \\\alpha = 57.72 (deg)$

5 0

3 years ago

What happens to the speed of an object when you increase or decrease force?

aliina [53]

If you increase speed you have to increase force to keep a balance Newton's second law.

3 0

3 years ago

If the acceleration of a truck over a given time interval is zero, how does the instantaneous velocity of that truck at any inst

klemol [59]

Answer:

Explanation:

8 0

4 years ago

the diagram below shows a segment of DNA before and after erplication, which of the following could have occured as a result of

Lorico [155]

The change or mutation in a segment of DNA after replication may lead to changes in the genotype, the traits of the organism and the proteins (option i, ii and iii).

<h3>What is a genetic mutation?</h3>

A genetic mutation is any change in the nucleotide bases of the genome of an organism that may be associated with modifications in the phenotypic traits or features of the organism if this change alters the expression of a given gene that produces a particular protein.

Mutations may be neutral when they don't show an apparent effect on the phenotype of an organism such as occur in mutations located in intergenic regions.

Therefore, with this data, we can see that a genetic mutation may alter the proteins produced by an organism which has a direct effect on the phenotype by altering the structures that it is able to synthesize.

Learn more about genetic mutations here:

brainly.com/question/29000870

#SPJ1

8 0

1 year ago