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Alexandra [31]
3 years ago
7

Long-Distance Space Travel

Physics
2 answers:
wel3 years ago
7 0

Answer:

Green house

Explanation:

You could build a little green house sorta thing bc plants produce oxygen and then the plants you can eat also you are supposed to have water so there s the plants water!

nadya68 [22]3 years ago
6 0

Answer:

hmm hmm

lemme think

Explanation:

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You hang a heavy ball with a mass of 94 kg from a platinum rod 3.2 m long by 2.2 mm by 3.1 mm. You measure the stretch of the ro
vlada-n [284]

Answer:

1.67\times 10^{11} N/m^2

Explanation:

Mass of the ball, m=94 kg

Force = weight of the ball

F=mg = 94kg\times 9.81 m/s^2=922.14N

For Young's modulus, substitute the values in the formula which is as follows:

\frac{F}{A}=Y\frac{\Delta L}{L}\\\Rightarrow Y= \frac{FL}{A\Delta L}\\\Rightarrow Y =\frac{922.14 \times 3.2}{2.2\times 10^{-3}\times 3.1\times 10^{-3} \times 0.002588}=1.67\times 10^{11} N/m^2

4 0
3 years ago
A nail driven into a board increases in temperature.
denis23 [38]

Answer:

ΔT = 40.91 °C

Explanation:

First we find the kinetic energy of one hit to the nail:

K.E = (1/2)mv²

where,

K.E = Kinetic energy = ?

m = mass of hammer = 1.6 kg

v = speed of hammer = 7.7 m/s

Therefore,

K.E = (1/2)(1.6 kg)(7.7 m/s)²

K.E = 47.432 J

Now, for 10 hits:

K.E = (10)(47.432 J)

K.E = 474.32 J

Now, we calculate the heat energy transferred (Q) to the nail. As, it is the 59% of K.E. Therefore,

Q = (0.59)K.E

Q = (0.59)(474.32 J)

Q = 279.84 J

The change in energy of nail is given as:

Q = mCΔT

where,

m = mass of nail = 7.6 g = 0.0076 kg

C = specific heat capacity of aluminum = 900 J/kg.°C

ΔT = Increase in temperature = ?

Therefore,

279.84 J = (0.0076 kg)(900 J/kg.°C)ΔT

ΔT = (279.84 J)/(6.84 J/°C)

<u>ΔT = 40.91 °C</u>

5 0
3 years ago
A 1.5 kilogram cart initially moves at 2.0 meters per second. It is brought to rest by a constant net forcé in 3.0 second. What
lubasha [3.4K]

The net force on the cart is

                   Force = (mass) x (acceleration) .

We know the mass = 1.5 kilogram, but we need to
calculate the acceleration.

               Acceleration = (change in speed) / (time for the change)

Change in speed = (ending speed) minus (beginning speed)

                               =    ( 0 )  -  ( 2 m/s )  =   -2 m/s

Acceleration =  (change in speed) / (time for the change)

                       =       ( -2 m/s )   /   (3 sec)

                       =           - 2/3  m/s² .

Finally ...        Net force = (mass) x (acceleration)

                                       =  (1.5 kilogram) x ( - 2/3 m/s²)

                                       =  ( - 3/2 x 2/3 )  (kg-m/s²)

                                       =       - 1  newton .

The negative sign on the force means the force is applied
opposite to the direction the cart is moving.  That gives
negative acceleration (slowing down), and the cart
eventually stops.   

3 0
4 years ago
Unlike the news media, which may be biased, science reporting can be depended on to be objective and not influenced by governmen
sveta [45]
The answer to the given statement above would be TRUE. Yes it is true that unlike the news media which may be biased, <span>science reporting can be depended on to be objective and not influenced by government policy and the interests of big corporations. Hope this answers your question.</span>
4 0
3 years ago
The harder a gas pedal in a car is pressed the faster the car's velocity increases. Which phrase best describes the relationship
Contact [7]

Answer:

D

There is both a positive correlation and causation

7 0
3 years ago
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