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3 years ago

Plz answer both thanks:)

Physics

2 answers:

vova2212 [387]3 years ago

8 0

Bottom 2 questions on the page:

Answer to BOTH is "acceleration'.

suter [353]3 years ago

5 0

Answer:

Acceleration.

Explanation:

F = m x a

The 'a' in formula above is acceleration.

Force is simply defined as the product of mass and acceleration. Mathematically, it is expressed as

Force(F) = Mass(m) x acceleration (a)

F = m x a

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Paola can flex her legs from a bent position through a distance of 20.1 cm. Paola leaves the ground when her legs are straight,

makkiz [27]

The third equation of free fall can be applied to determine the acceleration. So that Paola's acceleration during the flight is 39.80 m/ $s^{2}$ .

Acceleration is a quantity that has a direct relationship with velocity and also inversely proportional to the time taken. It is a vector quantity.

To determine Paola's acceleration, the third equation of free fall is appropriate.

i.e $V^{2}$ = $U^{2}$ ± 2as

where: V is the final velocity, U is the initial velocity, a is the acceleration, and s is the distance covered.

From the given question, s = 20.1 cm (0.201 m), U = 4.0 m/s, V = 0.

So that since Poala flies against gravity, then we have:

$V^{2}$ = $U^{2}$ - 2as

0 = $(4)^{2}$ - 2(a x 0.201)

= 16 - 0.402a

0.402a = 16

a = $\frac{16}{0.402}$

= 39.801

a = 39.80 m/ $s^{2}$

Therefore Paola's acceleration is 39.80 m/ $s^{2}$ .

Visit: brainly.com/question/17493533

7 0

3 years ago

Read 2 more answers

Anna [14]

Answer:

The best answer is - C. two-thirds.

Explanation:

Nuclear energy provides approximately 70% or two-thirds of the total energy production of France. The rest of the energy production of France comes from fossil fuels and renewable fuels or energy sources.

Fossil fuels are responsible for 7.1% and the other 22.9% are from renewable sources. These data are approximate values on the basis of the year 2018 energy production of France.

So, Nuclear power is the dominant source of energy in France.

4 0

3 years ago

Read 2 more answers

A diffraction grating with 600 lines/mmlines/mm is illuminated with light of wavelength 510 nmnm. A very wide viewing screen is

Ksenya-84 [330]

Answer:

A.2.95 m

B.7

Explanation:

We are given that

Diffraction grating=600 lines/mm

d= $\frac{1 mm}{600}=\frac{1\times 10^{-3} m}{600}=1.67\times 10^{-6} m$

Wavelength of light, $\lambda=510 nm=510\times 10^{-9} m$

l=4.6 m

A.We have to find the distance between the two m=1 bright fringes

$sin\theta=\frac{m\lambda}{d}$

For first bright fringe, =1

$sin\theta=\frac{1\times 510\times 10^{-9}}{1.67\times 10^{-6}}=0.305$

$\theta=sin^{-1}(0.305)=17.76^{\circ}$

The distance between two m=1 fringes

$x=2ltan\theta=2\times 4.6 tan(17.76^{\circ})=2.95 m$

Hence, the distance between two m=1 fringes=2.95 m

B.For maximum number of fringes,

$sin\theta=1$

$sin\theta=\frac{m\lambda}{d}$

Substitute the values

$1=\frac{m\times 510\times 10^{-9}}{1.67\times 10^{-6}}$

$m=\frac{1.67\times 10^{-6}}{510\times 10^{-9}}=3.3\approx 3$

Maximum number of bright fringes on the scree= $2m+1=2(3)+1=7$

8 0

4 years ago

A physical circuit refers to the transmission characteristics of the connection, such as the speed at which data is being sent t

Morgarella [4.7K]

Answer:

No, a physical circuit is just a path connecting point and switches. It cannot be related to the transmission characteristics. It's the logical circuit which can be refers to the transmission characteristics of connection such as speed of data etc. So the answer is false.

Explanation:

5 0

3 years ago

An inverted image of an object is viewed on a screen from the side facing a converging lens. An opaque card is then introduced c

Marta_Voda [28]

Answer:

d) The image would be dimmer

Explanation:

When inverted image of an object is viewed on a screen from the side facing a converging lens, the

lens focuses the diverging, and blurred light rays from the distance object through refraction of the rays two times.Then the rays is converge by the double bending cl at a focal point behind the lens inorder for a sharper image to be be observed.

But when an opaque card is then introduced to cover only the upper half of the lens then the image becomes dimmer because of the reduction in the light intensity on the screen by 50%

5 0

3 years ago