If a force of 12 n is applied to an object with a mass of 2kg the object will accelerate at

Answers

Answer 1

Answer: Using Newton's second law, F= ma
the acceleration would be>
F=ma
->F/m= a
->12/2= a
->6 = a

therefore acceleration is 6 ms^-2

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N a nuclear reaction, mass must be lost to produce energy. true or false

Answers

The answer is true. Nuclear reactions, unlike chemical reactions, do not explicitly follow the law of conservation of mass in the sense that part of the mass is lost in nuclear reactions. In nuclear reactions, some of the mass is actually converted to energy. This is made possible due to Einstein's equation: E = mc^2. Also, nuclear reactions make use of nucleons which give off greater energies than chemical reactions.

Magnesium is a metal that is commonly used in products that needed to be light weight. Suppose a 2.00kg piece of magnesium has 8160 j of entertainment added to it it's temperature increases 4K what is the specific heat of magnesium

Answers

Given that,

Mass of magnesium, m = 2 kg

Heat added to it, Q = 8160 J

Increase in temperature, $\Delta T=4\ K$

To find,

The specific heat of magnesium.

Solution,

Th formula that is used to find the heat required to raise the temperature in terms of specific heat is given by :

$Q=mc\Delta T\n\nc=(Q)/(m\Delta T)\n\nc=(8160\ J)/(2\ kg* 2\ K)\n\nc=2040\ J/kg-K$

So, the specific heat of magnesium is $2040\ J/kg-K$ .

Stars are powered by nuclear fusion reactions. True or false?

Answers

It is true. Stars are powered by nuclear fusion in their cores, mostly converting H into He.

the answer is true .......

How much force is necessary to stretch a spring 0.5 m when the spring constant is 190 N/m?

Answers

Answer

Force is necessary to stretch a spring 0.5 m when the spring constant is 190 N/m is 95 N .

Explanation:

By using Hookes law .

The force required to extend a spring is directly proportional to the distance you stretch it .

Thus

F = kx

Where F is force , k is spring constant and x is the extension of spring .

As given

A spring is stretch to 0.5 m .

The spring constant is 190 N/m .

x = 0.5 m

k = 190 N /m

Putting all the values in the formula

F = 190 × 0.5

= 95 N

Therefore the force is necessary to stretch a spring 0.5 m when the spring constant is 190 N/m is 95 N .

190x0.5=95N

Hope this helps :)

Which of the following sources of energy is not renewable? wind energy
wave energy
solar energy

Answers

Answer:

all the options listed are renewable sources of energy

Explanation:

renewable sources of energy are energy sources that are easily replenished naturally such as solar energy, wind energy , wave energy even energy from rain. These sources are usually environmental friendly that non renewable energy sources

non renewable energy however, are sources of energy that will eventually run out. examples are coal, crude oil, natural gas, nuclear energy. these sources mostly pose a high risk to the environment when being used.

hope this is quite helpful?

wind energy i think, but im not for sure

The type of wave that can be used to transmit your voice on a cell phone and to cook your food in an oven is a(n)a. X ray.
b. gamma ray.
c. microwave.
d. ultraviolet wave.

Answers

The answer is
c. Microwave

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