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3 years ago

What is a terrestrial planet?

Physics

1 answer:

NISA [10]3 years ago

3 0

Answer: Hi!

A terrestrial planet is composed of a solid substance like rock or earth. A few examples are our planet, Earth, and the red planet, Mars. These are the planets that are the closest to the sun. There are four terrestrial planets in total. The only known terrestrial planet that has life, however, is our own, Earth! Earth has the perfect conditions for supporting life forms.

Hope this helps!

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a 10 uF capacitpr is connected to a 12 V battery till its fully charged. it is then disconnected and to an uncharged 20 uF capac

likoan [24]

Answer:

Explanation:

The charge on 10μF capacitor = 10 x 12 x 10⁻⁶ = 120 μC

when it is connected with 20μF capacitor both acquires common potential whose value is

= 120 x 10⁻⁶ /( 10 +20) x 10⁻⁶ = 4 V.

Energy stored in 20μF capacitor =1/2 x 20 x 10⁻⁶ x 4 x 4 = 160 x 10⁻⁶ J.

6 0

3 years ago

1. A car with an initial velocity of 5m/s acceaccelerates uniformly at 3 metre per second square until it reaches a velocity of

alisha [4.7K]

Explanation:

here, u = 5m/s,a = 3m/s2, v = 23m/s, t = ?, s = ?

v = u+at

23 = 5 + 3t

t = 23- 5/3 = 18/3 = 6 sec

s= ut + 1/2 at ^2

s = 5 * 6 + 1/2 * 3 * (6)^2

s = 30 + 1/2 * 3 * 36

s = 30 + 18 * 3

s= 30 + 54 = 84 m

here, u = 0, a = x, t = 5min = 300 sec, s= 5.8km = 5800m

s = ut + 1/2 at^2

5800 = 0 * 300 + 1/2 * x * (300)^2

5800 = 1/2 * x * 90000

5800= 45000 x

x = 5800/45000

x = 0.12m/sec^2

here, v = 0, t = 6sec, s = ?, a = - 9.8m/s2

s = UT + 1/2 at ^2

s = 29.4 * 3 + 1/2 * - 9.8 * (3)^2

s= 88.2 - 44.1

s= 44.1 m

s = ut + 1/2 at ^2

s = 0 * 1 + 1*2 * 9.8 * (1)^2

s = 4.9m

hope it helps you

8 0

3 years ago

A force F acting on an object of mass m causes a displacement d. The angle between these two vectors is Θ. The work W done on th

777dan777 [17]

Work:
$W= \int\limits^b_a {F.} \, ds$

F: force
ds: displacement

Assuming the work is constant:

$W= \int\limits^b_a {F.} \, ds = F . d = F * cos\theta * d$

d displacement

4 0

3 years ago

If it takes Tanya 9.4 hours to get to her cousin's house while driving an average of 40 mph, how far away does her

Rufina [12.5K]

Answer:

376 miles

Explanation:

speed = distance / time

therefore distance = speed * time

distance = 40 miles/hr * 9.4 hr

then

distance = 375 miles

5 0

3 years ago

A 4.50-g bullet, traveling horizontally with a velocity of magnitude 400 m/s, is fired into a wooden block with mass 0.650 kg ,

Citrus2011 [14]

Answer:

a) μ = 0.1957 , b) ΔK = 158.8 J , c) K = 0.683 J

Explanation:

We must solve this problem in parts, one for the collision and the other with the conservation of energy

Let's find the speed of the wood block after the crash

Initial moment. Before the crash

p₀ = m v₁₀ + M v₂₀

Final moment. Right after the crash

pf = m $v_{1f}$ + M v_{2f}

The system is made up of the block and the bullet, so the moment is preserved

p₀ = pf

m v₁₀ = m v_{1f} + M v_{2f}

v_{2f} = m (v₁₀ - v_{1f}) / M

v_{2f} = 4.5 10-3 (400 - 190) /0.65

v_{2f} = 1.45 m / s

Now we can use the energy work theorem for the wood block

Starting point

Em₀ = K = ½ m v2f2

Final point

Emf = 0

W = ΔEm

- fr x = 0 - ½ m v₂₂2f2

The friction force is

fr = μN

With Newton's second law

N- W = 0

N = Mg

We substitute

-μ Mg x = - ½ M v2f2

μ = ½ v2f2 / gx

Let's calculate

μ = ½ 1.41 2 / 9.8 0.72

μ = 0.1957

b) let's look for the initial and final kinetic energy

K₀ = 1/2 m v₁²

K₀ = ½ 4.50 10⁻³ 400²

K₀ = 2.40 10² J

Kf = ½ 4.50 10⁻³ 190²

Kf = 8.12 10¹ J

Energy reduction is

K₀ - Kf = 2.40 10²- 8.12 10¹

ΔK = 158.8 J

c) kinetic energy

K = ½ M v²

K = ½ 0.650 1.45²

K = 0.683 J

5 0

4 years ago