What does the atomic number tell us about an atom of a certain element?

Answers

Answer 1
Answer: It tells us the number of protons in the nucleus of each atom of that element.

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What is the magnitude of force required to accelerate a car of mass 1.7 × 10³ kilograms by 4.75 meters/secondÆ?A. 3.6 X 10 ^3 N B. 1.7X10^3 N C. 8.1X10^3 N D. 9.0X10^3 N
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A cart is loaded with a brick and pulled at a constant speed along an inclined plane the the height of a seattop. If the mass of the loaded cart is 3.0 kg and the height of the seat top is 0.45 meters, then what is the potential energy of the loaded cart at the height of the seattop?

I'm taking physics and trying to figure out the 4 questions to this problem.

Answers

Answer:

Explanation:

At t = 1 velocity = 0

At t = 3 velocity = 3

slope of the line = 3-0 / 3-1 = 3/2

At t = 2

velocity = 3/2 x ( 2 - 1 )

= 1.5 m /s

velocity at t = 2 is 1.5 m /s

Position at t = 2 :

displacement at t = 2

area of graph upto  t = 2

= 1 / 2 x 1 x 1.5 = .75

position at t = 2 :

= initial position + displacement

= 10 + .75 = 10.75 m

position at 6 s :

displacement at t = 6

area of curve upto  t = 6

= 1 / 2 x 2 x 3 +  3 x 3 + 1/2 x 3 x ( 4.5 - 3 )

= 3 + 9 + 2.25

= 14.25 m

position at t = 6

= initial position + displacement

= 10 + 14.25 = 24.25 m

position at 9 s :

displacement at t = 9

area of curve upto  t = 9

= 1 / 2 x 2 x 3 +  4 x 3 + 1/2 x 4 x ( 5 - 3 )- 1/2 x 2 x 1.5

= 3 + 12 + 4 - 1.5

= 17.5  m

position at t = 9

= initial position + displacement

= 10 + 17.5 = 27.5  m

Which pair of terms best describes a wooden table?

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The answer is:

A) Biotic and non living

The explanation:

when Biotic refers to the component of living things that are part in ecosystem. Nonliving meaning a certain thing or the table does not have any life but it's biotic.

and we here have a wooden table that is derived from a living thing like a tree and it is nonliving as its a table.

Write a paragraph describing the series of events that occur in the operation of a complex machine that you have used recently and Identify the simple machines that make up parts of the complex machine.

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Complex machine i dont but i need to answer a question so i can ask a question so that is why i am answering for u

the length of time it takes a planet to revolve around the sun is equivalent to witch of the following?

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it really depends on how far or close the planet is from the sun

Answer:

The length of its year.

Explanation:

When Earth completes a full rotation, a year has completed. So, the same can be the same for other orbiting planet. The moon for example takes  29.5 days to revolve around the Earth, so one moon year is   29.5 Earth days.

Displacement is distance combined with

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Its combined with direction.

The three major scales used to measure earthquakes are Mercalli Scale, Richter Scale and Magnitude Scale.

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The statement ‘The three major scales used to measure earthquakes are Mercalli Scale, Richter Scale and Magnitude Scale’ is true. These three scales used to measure the seismic waves released by the earthquake.

Answer:true

Explanation: