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1 year ago

A What CE describes the way energy is stored in a sandwich

1 answer:

8 0

What is Potential Energy? You probably already know that without eating, your body becomes weak from lack of energy. Take a few bites of a turkey sandwich, and moments later, you feel much better. That's because food molecules contain potential energy, or stored energy, that can do work in the future. Hope it helps

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A 20kg mass approaches a spring at a speed of 30 m/s. The mass compresses the spring 12cm before coming to a stop. Calculate the

Oksana_A [137]

Answer:

625000 N/ m

Explanation:

m= 20 kg

v= 30 m/s

x= 12 cm

k = ?

Here when the mass when hits at spring its speed is

Vi= 30 m/s

Finally it comes to rest after compressing for 12 cm

i-e Vf = 0 m/s

Distance= S= 12 cm = 0.12 m

using

2aS= Vf2 - Vi2

==> 2a ×0.12 = o- 30 × 30

==> a = 900 ÷ 0.24 = 3750 m/sec2

Now we know;

F = ma

F= -Kx

==> ma= -kx

==> 20 × 3750 = -K × 0.12

==> k = 625000 N/ m

5 0

1 year ago

Astronauts land on another planet and measure the density of the atmosphere on the planet surface. They measure the mass of a 50

Lana71 [14]

$1.6 kg/m^3$ is the best estimate of the density of the air on the planet.

Given:

The mass of the conical flask with stopper is 457.23 grams and the volume is $500cm^3$ .

Mass of conical flask and a stopper after removing the air is 456.43 g

To find:

The density of the air on the planet.

Solution;

Mass of the conical flask and stopper with air on the planet= 457.23 g

Mass of conical flask with a stopper and without air on the planet = 456.43 g

Mass of the air in the conical flask on the planet =m

$m = 457.23 g-456.43 g=0.8 g\\\\1 g = 0.001 kg\\\\m =0.8 g =0.8\times 0.001 kg=0.0008 kg$

The volume of the conical flask = $500 cm^3$

The volume of the air in the conical flask = $V = 500cm^3$

$1 cm^3=10^{-6} m^3\\\\V= 500cm^3= 500\times 10^{-6}m^3=0.0005 m^3$

The density of the air on the planet = d

$d=\frac{m}{V}\\\\d=\frac{0.0008 kg}{0.0005 m^3}\\\\=1.6 kg/m^3$

$1.6 kg/m^3$ is the best estimate of the density of the air on the planet.

Learn more about density here:

brainly.com/question/952755?referrer=searchResults

brainly.com/question/14373997?referrer=searchResults

7 0

1 year ago

Despite the existence of research data that might inform policy about development , political rarely discuss such data in thier

morpeh [17]

Research studies are made because they want to solve problems that are occurring in the society. The benefits of research would eventually benefit the politics, especially because they have the power to implement these solutions to the problems. They don't usually delve into research because it is too technical. It is not their area of expertise. Questions may come up that they can't answer.

7 0

1 year ago

A car speeds up from 13 m/s to 23 m/s in 30 seconds. What is the acceleration of the car?

ra1l [238]

Well, v = u + a×t is the equation.

v: final velocity, which is 23 m/s in this equation.
u: initialo velocity = 13 m/s 
a: acceleration = ? 
t: time = 30s

Your equation would be...

23 = 13 + a×30 
a = (23 - 13) / 30 
a = 1 / 3 
a = 0.333 m/s

7 0

1 year ago

The ____ button on the rehearsal toolbar clears the slide time box and resets the timer to 0:00:00.

Serggg [28]

The Rehearsal toolbar is used in Microsoft Power Point. It has buttons that allow the user to start, pause and repeat viewing the slides in the slide show. The buttons are: next, pause recording, slide time, repeat and elapsed time. The slide time button on the rehearsal toolbar clears the slide time box and resets the timer to 0:00:00.

6 0

1 year ago

A What CE describes the way energy is stored in a sandwich​

A What CE describes the way energy is stored in a sandwich