The speedometer of a car moving to the east reads 55 mph. it passes another car that moves to the west at 55 mph. the cars have the same

a. velocity
b. speed
c. same speed and velocity
d. neither the same speed nor the same velocity

The answer is B.

This is because both cars are moving at the same speed, but have different velocities due to the different directions they are moving in.

The correct answer is B.

Explanation:

Speed is the scalar quantity. It has magnitude only. For example, the car is moving with the speed of 60 km per hour.

The velocity is the vector quantity. It has magnitude as well as direction.

For example, the car is moving with the velocity of 60 km per hour in the north direction.

In the given problem, the speedometer of a car moving to the east reads 55 mph. It passes another car that moves to the west at 55 mph.

In this case, the speed is same which is equal to 55 mph but the velocities are different as the directions of the cars are different. The velocities of the cars are 55 mph to the east direction and 55 mph to the west direction.

Therefore, the cars have the same speed.

-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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