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Andru [333]
2 years ago
8

A SpaceX rocket launched from the Boca Chica space port must attain a speed of 10000 m/s during the first 6 minutes of flight. U

sing the first equation of motion, determine the acceleration needed for a succesful take off.
Physics
1 answer:
salantis [7]2 years ago
5 0

Answer:

27.78 m/s²

Explanation:

t = Time taken = 6 minutes

u = Initial velocity = 0 (assuming it started from rest)

v = Final velocity = 10000 m/s

s = Displacement

a = Acceleration due to gravity = 9.81 m/s²

First equation of motion

v=u+at\\\Rightarrow a=\frac{v-u}{t}\\\Rightarrow a=\frac{10000-0}{6\times 60}\\\Rightarrow a=27.78\ m/s^2

Acceleration of the rocket is 27.78 m/s²

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At room temperature what is the strength of the electric field in a 12-gauge copper wire (diameter 2.05 mm that is needed to cau
Dima020 [189]
Electric field strength = resistivity of copper x current density
where
p= 1.72 x 10^-8 <span>ohm meter
diameter = 2.05mm=.00205 m
current = 2.75 A
</span>get first the current density:
current density = current/ cross section area
find the cross section area
cross section area = pi.(d/2)^2;  
cross section = 3.3 006x10-6 m^2
substitute the values 
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current density=35.55 x1 0^2 A/m^2
Electric field stregnth =1.72 x 10^-8 ohm meter x 35.55 x10^2 A/m^2
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The electric field strength of copper is 46.415 V/m.


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3 years ago
Mercury has one of the lowest specific heats. This fact added to its liquid state at most atmospheric temperatures make it effec
UNO [17]

The specific heat of mercury is 149.4 J/(kgK)

Explanation:

When a substance is supplied with an amount of energy Q, its temperature increases according to the equation:

\Delta T=\frac{Q}{mC_s}

where

\Delta T is the increase in temperature

m is the mass of the sample

C_s is its specific heat capacity

For the sample of mercury in this problem we have

Q = 275 J

m = 0.450 kg

\Delta T = 4.09 K

Therefore, by re-arranging the equation we find the mercury's specific heat:

C_s = \frac{Q}{m\Delta T}=\frac{275}{(0.450)(4.09)}=149.4 J/(kgK)

Learn more about specific heat capacity:

brainly.com/question/3032746

brainly.com/question/4759369

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3 years ago
New ocean crust or sea floor is produced when tectonic plates _______.<br> diverge<br> converge
GarryVolchara [31]
Diverge is the right answer
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2 years ago
What are the names of the 2 charged particles in an atom and what are their charges
Sholpan [36]

Answer:

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Explanation:

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  • The physical and chemical characteristics of an atom are determined by the number of these particle composition.
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  • The neutrons are also located in the nucleus of an atom with no charge.
  • The electrons has a negative charge and it is placed around the nucleus having different shells and quantum state.
  • The charges of the protons and electrons are denoted by +q and -q. The quantization of these charges are +1, +2, ... and -1, -2, .... etc.
3 0
2 years ago
I REALLY NEED HELP
ikadub [295]
The first law of thermodynamics states the conservation of energy and heat where the total energy in an isolated system may be transformed into another, but never created or destroyed. If 286 J of energy was released to the room, then also 286 J of energy was also removed from food in that refrigerator assuming it is an isolated system.   :)

Read more on Brainly - brainly.com/sf/question/3844753
I tried to help
3 0
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