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Vika [28.1K]
4 years ago
14

Which planets are considered “rocky planets”?

Physics
2 answers:
Readme [11.4K]4 years ago
7 0
Mercury, Venus, Earth and Mars are the four rocky planets
zmey [24]4 years ago
6 0

Answer:

There are four rocky, or terrestrial, planets: Mercury, Venus, Earth, and Mars. These planets are called terrestrial planets because they are made up of rocks and metals and have solid surfaces.

Explanation:

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If you start rolling down this hill, your potential energy will be converted to kinetic energy. At the bottom of the hill ypu KE
Serjik [45]

Answer:

v=\sqrt{(2x/m)}\  \ m/s

Explanation:

Potential Energy= Kinetic Energy

Let x be the value of Kinetic Energy.

We know that

PE=KE=x\\x=\frac{1}{2}mv^2\\

Make v the subject of the formula to get speed at the bottom of the hill.

v^2=2x/m\\v=\sqrt{2x/m}

8 0
3 years ago
A parallel-plate capacitor consists of two plates, each with an area of 27 cm^2 separated by 3.0 mm. The charge on the capacitor
aev [14]

Answer:

Explanation:

Capacity of a parallel plate capacitor  C = ε₀ A/ d

ε₀ is permittivity whose value is 8.85 x 10⁻¹² , A is plate area and d is distance between plate.

C =(  8.85 X10⁻¹² X  27 X 10⁻⁴ ) / 3 X 10⁻³

= 79.65 X 10⁻¹³ F.

potential diff between plate = Charge / capacity

= 4.8 X 10⁻⁹ / 79.65 X 10⁻¹³

= 601 V

Electric field = V/d

= 601 / 3 x 10⁻³

= 2 x 10⁵ N/C

Force on proton

= charge x electric field

1.6 x 10⁻¹⁹ x 2 x 10⁵

= 3.2 x 10⁻¹⁴

Acceleration a = force / mass

= 3.2 x 10⁻¹⁴ / 1.67 x 10⁻²⁷

= 1.9 x 10¹³ m s⁻²

Distance travelled by proton = 3 x 10⁻³

3 x 10⁻³ = 1/2 a t²

t = \sqrt{\frac{3\times2\times10^{-3}}{1.9\times10^{13}} }

t = 1.77 x 10⁻⁸ s

6 0
4 years ago
An object thrown straight up a distance ymaxymax. After tt seconds, it falls back and is caught again, just as it reaches the he
Mazyrski [523]

Answer:

Avg.velocity=(Δy/ Δt)  =(net displacement/ total time for journey)

Δy = 0

Δt = t

so avg. velocity = 0/t =0

Avg. speed =(total distance traveled/ total time for journey)

total distance = up +down = Ymax+Ymax= 2 Ymax

total time = t

avg. speed = 2 Ymax/t

Explanation:

Since there is no net displacement from the original position,velocity is zero. Claudia is right!

while it covered some distance in time t so its speed is not as qouted by Hossien

6 0
4 years ago
Which element has a magnetic properties​
vodomira [7]

Answer:

Since then only three elements on the periodic table have been found to be ferromagnetic at room temperature - iron (Fe), cobalt (Co), and nickel (Ni). The rare earth element gadolinium (Gd) nearly misses by only 8 degrees Celsius.

Explanation:

3 0
3 years ago
Read 2 more answers
Which of the following would have an effect on an object's mass?
ICE Princess25 [194]
None of the above

mass is measurement of how much stuff in inside something.
if you freeze or heat an object, you merely change the state of the object. the mass is conserved.
if you change the elevation, nothing happens to the mass. the stuff will not leave the object.
so it is None of the above


8 0
3 years ago
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