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3 years ago

Why should the launch speed be greater than the minimum possible speed?

1 answer:

3 0

The launch speed gets a object into motion, so it has to be greater than the minimum possible speed to move forward against the other forces like gravity. Once it reached inertia then the minimum possible can be used

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valentinak56 [21]

Answer: Its 2 plates hold opposite charges and the separation between them creates an electric field. That's why a capacitor stores energy.

7 0

3 years ago

In getting ready to slam-dunk the ball, a basketball player starts from rest and sprints to a speed of 4.82 m/s in 1.98 s. Assu

Ann [662]

Great equation: distance = rate*time

So, distance run = 4.82 meters/second * 1.98 seconds = 9.5436 meters (round according to whatever the problem specifies, usually to the tenths or hundredths is sufficient).

This makes sense if you think about it since you are multiplying seconds with meters over seconds. The seconds cancel out, leaving you only the meters.

7 0

3 years ago

Red light of wavelength 651 nm produces photoelectrons from a certain photoemissive material. Green light of wavelength 521 nm p

Mnenie [13.5K]

Answer:

material work function is 0.956 eV

Explanation:

given data

red wavelength 651 nm

green wavelength 521 nm

photo electrons = 1.50 × maximum kinetic energy

to find out

material work function

solution

we know by Einstein photo electric equation that is

for red light

h ( c / λr ) = Ф + kinetic energy

for green light

h ( c / λg ) = Ф + 1.50 × kinetic energy

now from both equation put kinetic energy from red to green

h ( c / λg ) = Ф + 1.50 × (h ( c / λr ) - Ф)

Ф =( hc / 0.50) × ( 1.50/ λr - 1/ λg)

put all value

Ф =( 6.63 × $10^{-34}$ (3 × $10^{8}$ ) / 0.50) × ( 1.50/ λr - 1/ λg)

Ф =( 6.63 × $10^{-34}$ (3 × $10^{8}$ ) / 0.50 ) × ( 1.50/ 651× $10^{-9}$ - 1/ 521 × $10^{-9}$ )

Ф = 1.5305 × $10^{-19}$ J × ( 1ev / 1.6 × $10^{-19}$ J )

Ф = 0.956 eV

material work function is 0.956 eV

4 0

3 years ago

Read 2 more answers

Carbon dioxide is released when limestone is heated during the production of

Archy [21]

Answer:

Calcium

Explanation:

Because limestone is mainly calcium carbonate, CaCO3, which when heated breaks down to form calcium oxide and carbon dioxide.

6 0

4 years ago

What was the problem that led scientists to explore genetic engineering as a solution?

Artyom0805 [142]

Genetic engineering was a solution to drought
This website will help you...
https://www.weforum.org/agenda/2014/08/genetic-engineering-drought-irrigation-regulations/I hope this helped! (The picture is nothing special. But if you looked at the website above, you would look like it!)

4 0

3 years ago