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3 years ago

If a car was cruising down the highway at 80 km/hr, how fast would the people inside the car be traveling?

2 answers:

6 0

Because the people in the car are attached to the vehicle, the people inside the vehicle are going the same speed as the vehicle.

Hope this helps! :)

luda_lava [24]3 years ago

3 0

The people inside the car are at rest (speed = zero) relative to the car, moving 80 km/hr relative to the pavement, and slightly slightly less relative to a worm slithering on the road in the same direction as the car.

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Carbon-14 has a half-life of 5,730 years. if the age of an object older than 50,000 years cannot be determined by radiocarbon da

Aleonysh [2.5K]

<h3>Answer;</h3>

Carbon-14 levels in a sample are undetectable after approximately 9 half lives

<h3>Explanation;</h3>

The half life of Carbon-14 is 5,730 years . Half life is the time taken by a radioactive material to decay by half of its original mass. Therefore, it would take a time of 5730 years for a sample of 100 g of carbon-14 to decay to 50 grams

A period of 50,000 years, is equivalent to;

 50,000÷5,730 

= 8.73 half lives

Which is approximately equal to 9 half lives.

Therefore, if the age of an object older than 50,000 years cannot be determined by radiocarbon dating, then Carbon-14 levels in a sample are undetectable after approximately 9 half lives.

6 0

3 years ago

Read 2 more answers

The dentisty of an object relies on both the _________ of the object.

Daniel [21]

Answer:

Density is determined by an object's mass and volume.

Explanation:

If two objects take up the same volume, but one has more mass, then it also has a higher density.

7 0

3 years ago

Two male moose charge at each other with the same speed and meet on a icy patch of tundra. As they collide, their antlers lock t

Ksenya-84 [330]

Change in velocity of larger moose: (1/3)v - v = -(2/3)v
change in velocity of small moose: (1/3)v - (-v) = (4/3)v 
- (change in velocity of larger moose)/(change in velocity of smaller moose) = 2

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4 0

3 years ago

Read 2 more answers

I need a sentence for the word sandy soil

rusak2 [61]

One day, as I was walking, I found some sandy soil beside the road.

6 0

3 years ago

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In 1911, Ernest Rutherford and his assistants Geiger and Marsden conducted an experiment in which they scattered alpha particles

alexandr402 [8]

Answer:

Explanation:

We shall apply conservation of mechanical energy

kinetic energy of alpha particle is converted into electric potential energy.

1/2 mv² = k q₁q₂/d , d is closest distance

d = 2kq₁q₂ / mv²

= 2 x 9 x 10⁹ x 79e x 2e / 4mv²

= 1422 x2x (1.6 x 10⁻¹⁹)² x 10⁹ /4x 1.67 x 10⁻²⁷ x (1.5 x 10⁷)²

= 3640.32 x 10⁻²⁹ /2x 3.7575 x 10⁻¹³

= 484.4 x 10⁻¹⁶

=48.4 x 10⁻¹⁵ m

8 0

4 years ago