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3 years ago

What is the purpose of setting a deadline for a goal?

Physics

1 answer:

bagirrra123 [75]3 years ago

6 0

So you can get it done on time/faster then what ever else time

You might be interested in

Calculate the wavelength in centimeters of radar energy at a frequency of 10 GHz. What is the frequency in gigahertz of radar en

ddd [48]

Answer:

Energy will be equal to $6.6\times 10^{-27}J$

Frequency will be equal to $12\times 10^8Hz$

Explanation:

We have given frequency of the radar f = 10 GHz $=10\times 10^6Hz$

Speed of light $c=3\times 10^8m/sec$

Plank's constant $h=6.6\times 10^{-34}js$

So energy $E=h\nu$ ,here h is plank's constant and $\nu$ is frequency

So energy $E=6.6\times 10^{-34}\times 10^{7}=6.6\times 10^{-27}J$

In second case we have given wavelength = 25 cm = 0.25 m

Wavelength is equal to $\lambda =\frac{c}{f}$

So $f=\frac{c}{\lambda }=\frac{3\times 10^8}{0.25}=12\times 10^8Hz$

So frequency will be equal to $12\times 10^8Hz$

8 0

3 years ago

An opera singer who is a baritone, lowers his pitch and raises his voice for a song. Which best describes how the resulting soun

Usimov [2.4K]

Answer: 3.

Explanation:

The correct answer is a higher amplitude and lower frequency. Since an opera singer is lowering his pitch it means that he is creating higher amplitude and because he is raising his voice for a song with that higher amplitude he is creating lower frequency.

8 0

2 years ago

3. How do you think a hot air balloon works?

tiny-mole [99]

Answer:hot air

Explanation:Hot air goes up, so when you put it in a hot air balloon fire is placed at the oppening to creat hot air and lift the balloon! :)

5 0

2 years ago

Explain why nuclear fission and nuclear fusion release large amounts of energy

levacccp [35]

Answer:

Because of the formula $E=mc^2$

Explanation:

In this problem we are describing two different processes:

Nuclear fission occurs when a heavy, unstable nucleus breaks apart into two or more lighter nuclei

Nuclear fusion occurs when two (or more) light nuclei fuse together producing a heavier nucleus

In both cases, the total mass of the final products is smaller than the total mass of the initial nuclei.

According to Einsten's formula, this mass difference has been converted into energy, as follows:

$E=\Delta mc^2$

where:

E is the energy released in the reaction

$\Delta m$ is the mass defect, the difference between the final total mass and the initial total mass

$c=3.0 \cdot 10^8 m/s$ is the speed of light

From the formula, we see that the factor $c^2$ is a very large number, therefore even if the mass defect $\Delta m$ is very small, nuclear fusion and nuclear fission release huge amounts of energy.

8 0

3 years ago

A small button placed on a horizontal rotating platform with diameter 0.320 m will revolve with the platform when it is brought

Otrada [13]

Answer:

0.2687 approximately 0.27

Explanation:

Diameter = 0.320

Speed = 40.0 rev/min

We are required to find coefficient of static friction between friction and button

The radius can be calculated as

0.320/2

= 0.160m

Then we have the rotational speed w = 40rev/min x 2pi/60

= 4.19 rad/s

umg = mrw²

u = mrw²/mg

u = rw²/g -------(1)

g = 9.8

When we put values into equation 1

0.150m x 4.19² / 9.8

= 0.150m x 17.5561 /9.8

= 0.2689

This is approximately 0.27

6 0

3 years ago