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3 years ago

Help!!

1 answer:

5 0

D. Circulatory
The digestive system works very closely with the circulatory system to get the absorbed nutrients distributed through your body. The circulatory system also carries chemical signals from your endocrine system that control the speed of digestion.

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If the box weighs 40 newtons and is lifted a distance of 2 meters, how much work is done on the box?

Zarrin [17]

Answer:

The work done on the box is 80 J.

Explanation:

Given that,

Weight of box = 40 N

Distance = 2 meter

We need to calculate the work done

Using formula of work done

$W=F\times x$

$W=mg\times x$

Where, x = distance

mg = weight

Put the value into the formula

$W=40\times2$

$W= 80\ Nm$

$W=80\ J$

Hence, The work done on the box is 80 J.

5 0

4 years ago

In a double-slit interference experiment, which of the following actions (perhaps more than one) would cause the fringe spacing

frozen [14]

Answer:

The correct option is a , c

Explanation:

Generally the fringe spacing is mathematically defined as

$y = \frac{m \lambda D}{d}$

Where y is the fringe spacing

m is the order of the fringe

$\lambda$ is the wavelength

D is the distance between the slit and the screen

d is the distance between the slit

Now in order to increase the fringe spacing can do the following

Increase the wavelength
increase the distance from the slit to the screen
Decrease the distance between the slit

The following action would increase the fringe spacing because the from the question these parameters are directly proportional to the fringe spacing

3 0

3 years ago

Use Kepler's third law to find the planet's average distance (semimajor axis) from its star. (Hint: Because the mass of the star

konstantin123 [22]

Answer:

Explanation: The planet average distance = 42300km

Kepler's 3rd Law also known as the Harmonic Law states that;

for each planet orbitting the sun, its side real period squared divided by the cube of the semi-major axis of the orbit is a constant.

A planet, mass m, orbits the sun, mass M, in a circle of radius r and a period t. The net force on the planet is a centripetal force, and is caused the force of gravity between the sun and the planet.

Please find the attached file for the solution

3 0

3 years ago

An electron is released from rest at the negative plate of a parallel-plate capacitor. If the distance across the plate is 2.0 m

ddd [48]

Answer:

Velocity of electron will be $1.325\times 10^6m/sec$

Explanation:

We have given distance across the plate d = 2 mm $=2\times 10^{-3}m$

Potential difference V = 6 volt

We know that potential difference at any distance is given by

V = Ed , here V is potential difference, E is electric field and d is distance

So $E=\frac{V}{d}=\frac{6}{2\times 10^{-3}}=3000N/C$

Charge on electron $e=1.6\times 10^{-19}C$

We know that expression of velocity is given by $v=\sqrt{\frac{2qEd}{m_e}}$ , here q is charge on electron, E is electric field and d is distance

So $v=\sqrt{\frac{2\times 1.6\times 10^{-19}\times 3000\times 3000}{9.11\times 10^{-31}}}=1.325\times 10^6m/sec$

8 0

4 years ago

In a recent survey, state voters said they were not pleased with the conditions of roads. They would like to see current roads i

topjm [15]

They are saying that they would like to see new roads and improvements, but they refuse to pay for it by giving up more money in taxes. Hope this helps :)

4 0

3 years ago