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ella [17]
3 years ago
12

ALWAYS use significant figure rules. Remember that these rules apply to all numbers that are measurements. An object on earth ha

s a mass of 4 kg. Calculate its weight on another planet that has an acceleration due to gravity one-half that of the earth. w2 = N
Physics
1 answer:
kirza4 [7]3 years ago
8 0

Answer:

19.6 kg*m/s^2 = 19.6 N

Explanation:

Weight is mass times acceleration due to gravity.  And hopefully you know that acceleration due to gravity on earth is 9.8 m/s^2  So what is half of that?  4.9.  So now the calculation is super simple.

mass = 4 kg and acceleration = 4.9 m/s^2 so now we multiply these two numbers and get 19.6 kg*m/s^2.  kg*m/s^2 is also known as Newtons, abbreviated with an N so the final result is 19.6 N.  

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What is the conservation of energy?
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Energy cannot be created nor be destroyed
6 0
3 years ago
When can liquid water remain above 100 C?
galben [10]
Well,

Typically, a substance is under 1 atmosphere of pressure, or 1 atm.  More than 1 atm means there is more pressure than that which the earth's atmosphere exerts on an object near the surface of the earth.

If a liquid is given enough energy, and the atmospheric pressure remains constant, the liquid will turn into a gas.  In the case of water, it will turn into water vapor at 100 °C.  However, if you increase the pressure to greater than 1 atm, the water will be pushed together, keeping it liquid.
3 0
3 years ago
The ethical guidelines related to animal research dictate that
Zigmanuir [339]

Answer:

Animals are treated as humanely as possible.

Explanation:

Ethical guidelines relating to animals are laid down principles or laws that guide against the maltreatment of animal in any way during or for a research. As the use of some animals for various researches can not be over emphasized, because of the close proximity between their body tissues to that of humans.

The ethical guidelines enforce treating animals as humanly as possible or achievable. This ensure appropriate handling and treatment of the animals.

4 0
3 years ago
27. The pressure at A is 9.5 atm and the water velocity is 10 m/s. What is the water velocity at point C
pogonyaev

Answer:

10 m/s

Explanation:

6 0
3 years ago
An undiscovered planet, many lightyears from Earth, has one moon in a periodic orbit. This moon takes 1760 1760 × 103 seconds (a
Katen [24]

Answer:

a_c=6.471\frac{m}{s^{2}}

Explanation:

We can calculate the magnitude of the tangential velocity of the moon, using the equation:

v=\frac{2\pi R}{\tau}

(This works, since velocity is defined as distance over time; in this case the distance is 2πR and the time is the period τ)

Next, from the equation of the centripetal acceleration we have:

a_c=\frac{v^{2} }{R}\\\\a_c=\frac{4\pi^{2}R}{\tau^{2} }

Be careful, the radius of the orbit R is equal to the distance from the center of the moon to the center of the planet. So we have to sum the distance from the center of the moon to the surface of the planet and the radius of the planet to obtain R:

R=285.0*10^{6} m+3.50*10^{6} m=288.5*10^{6}m

Finally, plugging the given values into the centripetal acceleration formula, we have:

a_c=\frac{4(3.141)^{2}(288.5*10^{6}m)}{(1760*10^{3}s)^{2}} =6.471\frac{m}{s^{2}}

In words, the moon's radial acceleration a_c is 6.471m/s².

3 0
3 years ago
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