3 years ago

What is the primary technique for determining the absolute age of rock

Physics

1 answer:

jekas [21]3 years ago

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D. measuring radioactive decay of element isotopes

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A rock is thrown downward from a height of 207 m with an initial velocity of 5.37 m/s. Approximately how fast will it it be movi

Zolol [24]

List the known information:

$x_0=207 \text{ m}\\v_0=-5.37 \text{ m/s}\\t=3.03 \text{ s}\\a=-g=-9.8 \text{ m/s}^2$

Use the kinematic equation $v=v_0+at$ .

Plug in the given values:

$v=-5.37 \text{ m/s}+(-9.8 \text{ m/s}^2)(3.03 \text{ s})=-35.064 \text{ m/s}$

This would be 35.064 m/s downward, or 35 m/s downward with significant figures taken into account.

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3 years ago

A world-class tennis player can serve a tennis ball at 150 mi/h (about 67 m/s). The length of a tennis

Rudik [331]

Answer:

The expression for the time taken by an object to move with a speed at some distance is,

t= d/v

Here, t is the time taken by the opponent to react, d is the length of the court, andis the speed of the ball.

Explanation:

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3 years ago

What is the net force on a race car with a mass of 1200 kg if its acceleration is 32.0m/s2 West?

frosja888 [35]

Answer:

38400N

Explanation:

F=mass×acceleration

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3 years ago

How many elements have been identified a.118 b. 209 c.150

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Hydrogen to Ununbium are known, with Ununbium only been discovered in 1996. Elements 114, 116 and 118 have also been discovered more recently, bringing the total to 118 known elements.

ANSWER: A. 118

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4 years ago

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How would you describe the relationship between the mass of a car and its kinetic energy?

Nataly [62]

As the mass of the car increases, its kinetic energy increases

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