According to newton's first law of motion, if there is no net force (unbalanced forces) acting on an object that is moving at a constant 30 mph, the object will:

a)continue to move at 30 mph

b)eventually come to a stop

c)change its inertia

d)accelerate

If there is no net force acting on an object moving at a constant speed of 30 mph, then the object will continue to move at 30 mph.

Option A

Explanation:

As per Newton’s first laws of motion, an object will continue to stay in its state of motion or rest until an external unbalanced forces act on the object. So, it states that a moving objects will keep on moving unless and until a resisting forces act on it. Thus the required resisting force to stop object moving is termed as frictional force.

Similarly, if an object is at rest then it will stay at rest unless an external unbalanced forces are applied on the object and that force should be greater than the inertial force of the object. Thus, in the present case, an object moving with constant velocity at 30 mph will continue to move at 30 mph in the absence of net unbalanced force acting on the object.

answer: the correct answer is   air pressure at the top of mount everest is higher than at the bottom of the grand canyon.

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explanation:

-first use of geothermal energy occurred more than 10,000 years ago in north america by american paleo-indians

-the first industrial use of geothermal energy began near pisa, italy in late 18th century

-in 1904, italian scientist piero ginori conti invented the first geothermal electric power plant in which steam was used to generate the power

-with the above experiment, the first geothermal plant in usa started in 1922 with a capacity of 250 kilowatts

-however, in 1946 first ground-source geothermal heat pump installed at commonwealth building in portland, oregon

-during the 1960’s, pacific gas and electric began operation of first large scale geothermal power plant in san francisco, producing 11 megawatts

-in 1973, when oil crisis began many countries began looking for renewable energy sources and by 1980’s geothermal heat pumps (ghp) started gaining popularity in order to reduce heating and cooling costs

-as effect of climate change started showing results, governments of various countries joined hands to fight against it, for which kyoto protocol was signed in japan in 1997, laid out emission targets for rich countries and required that they transfer funds and technology to developing countries, 184 countries have ratified it

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