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3 years ago

Which planets are composed more of gas than liquids and solids?

Physics

1 answer:

djyliett [7]3 years ago

5 0

Answer:

Jovian planets

Explanation:

The gas giants, or jovian or extra-terrestrial planets are predominantly made up of gases than liquids and solids.

They are located beyond the fringes of the Asteroid belts which is the zone between the inner and outer planets.

The outer planets are Jupiter, Saturn, Uranus and Neptune. These planets are made up of gases predominantly hydrogen and helium.

The inner planets called terrestrial planets are solids balls of rocks. These planets are Mercury, Venus, Earth and Mars.

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A car accelerates along a straight road from rest to 90 km/h in 5.0 s. A) Find the magnitude of its average acceleration. B) Fin

egoroff_w [7]

Answer:

a) $A=5m/s^2$

b) $V=25m/s$

Explanation:

From the question we are told that:

Velocity $v=90km/h=25m/s$

Time $t=5.0s$

Generally From Newton's motion equation for Average acceleration is mathematically given by

$A=\frac{V-U}{t}$

Since its from Rest Therefore

$U=0$

$A=\frac{25m/s-0}{5s}$

$A=5m/s^2$

Generally the equation for Average Velocity is mathematically given by

$V=u+at$

$AT t=1.0s\\\\V=0+5(1)$

$V=5m/s$

$AT t=2.0s\\\\V=0+5(2)$

$V=10m/s$

$AT t=5.0s\\\\V=0+5(5)$

$V=25m/s$

6 0

2 years ago

What is happening to the water molecules as it changes from ice to liquid water? *

g100num [7]

Answer:

They are gaining energy, can move and slide past each other.

Explanation:

Because as ice melts, the molocules gain energy/heat which warm them up and are able to slide/move apart from each other.

7 0

3 years ago

Initial velocity vector vA has a magnitude of 3.00 meters per second and points 20.0o north of east, while final velocity vector

garri49 [273]

Answer:

$5.2\ \text{m/s}$

$70^{\circ}$ south of east

Explanation:

$v_a$ = 3 m/s

$\theta_a$ = $20^{\circ}$ north of east

$v_b$ = 6 m/s

$\theta_b$ = $40^{\circ}$ south of east = $360-40=320^{\circ}$ north of east

x and y component of $v_a$

$v_{ax}=v_a\cos \theta\\\Rightarrow v_{ax}=3\times \cos 20^{\circ}\\\Rightarrow v_{ax}=2.82\ \text{m/s}$

$v_{ay}=v_a\sin\theta\\\Rightarrow v_{ay}=3\times \sin20^{\circ}\\\Rightarrow v_{ay}=1.03\ \text{m/s}$

x and y component of $v_b$

$v_{bx}=v_b\cos \theta\\\Rightarrow v_{bx}=6\times \cos 320^{\circ}\\\Rightarrow v_{bx}=4.6\ \text{m/s}$

$v_{by}=v_b\sin\theta\\\Rightarrow v_{by}=6\times \sin320^{\circ}\\\Rightarrow v_{by}=-3.86\ \text{m/s}$

$\Delta v=v_b-v_a\\\Rightarrow \Delta v=(4.6-2.82)\hat{i}+(-3.86-1.03)\hat{j}\\\Rightarrow \Delta v=1.78\hat[i}-4.89\hat{j}$

Magnitude

$|\Delta v|=\sqrt{(-4.89)^2+1.78^2}\\\Rightarrow \Delta v=5.2\ \text{m/s}$

Direction

$\theta=\tan{-1}|\dfrac{-4.89}{1.78}|\\\Rightarrow \theta=70^{\circ}$

The magnitude of the change in velocity vector is $5.2\ \text{m/s}$ and the direction is $70^{\circ}$ south of east.

6 0

3 years ago

What is the magnitude of the vector described below?

egoroff_w [7]

A 'vector' is a measurement that has a magnitude and a direction.

For the vector given here, "<em>15 ft/s</em>" is the magnitude, and "down" is the direction.

5 0

3 years ago

What are some physical activities you can do at home to help you with arm strength , as well as

Bond [772]

Answer:

See the explanation below

Explanation:

To improve the strength in the arms can be performed arm push-ups, there are different variants for this exercise. But ideally, perform the known basic exercise, try to touch with the chest the floor and then rise up to the length of the arms using the strength of these. It will be necessary for beginners to perform a routine of 3 sets to 10 repetitions. Rest one day. In the third week you can perform 4 sets to 25 repetitions, resting only one day. This will improve the strength in the arms considerably.

For the legs should stimulate the muscle of the quadriceps, should perform an exercise known as squat, to perform it should be lowered with your back straight until the knees form an angle of 90 degrees, for beginners should perform 3 sets of 15 repetitions a day, resting only one day. In the second week you can perform 4 sets of 25 repetitions a day, resting one day a week.

6 0

3 years ago