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3 years ago

Scientists can find the absolute age of a rock by using

Physics

1 answer:

yaroslaw [1]3 years ago

6 0

Explanation:

Carbon-14 is normally used to date living organisms (all living things we know today contain mostly carbon). It can be used for samples up to about 60000 years old. Carbon-12 is the non-radioactive form that we encounter daily. Relative dating determines dates relative to each other, such as ordering of period or events.

Uranium 235 dating can determine date samples a million years old and up, so is more suited for rocks.

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a Car with a mass of 2000 kg is moving around a circular curve at a uniform velocity of 25 m/s the curve has a radius of 80 m wh

Viefleur [7K]

Well, first of all, the car is not moving at a uniform velocity, because,
on a curved path, its direction is constantly changing. Its speed may
be constant, but its velocity isn't.

The centripetal force on a mass 'm' that keeps it on a circle with radius 'r' is

   F = (mass) · (speed)² / (radius).

For this particular car, the force is

(2,000 kg) · (25 m/s)² / (80 m)

   = (2,000 kg) · (625 m²/s²) / (80 m)

   = (2,000 · 625 / 80) (kg · m / s²)

   = 15,625 newtons .

5 0

3 years ago

CAN SOMEONE PLZ TELL ME HOW TO WRITE THIS DATA IN THE THE TABLE INTO A GRAPH?

vitfil [10]

Here is a helpful video https://www.khanacademy.org/_render

6 0

3 years ago

Section 1 - Question 30

stira [4]

Answer : A
Explanation: he is motivated to make the football team

3 0

3 years ago

Who has the primary responsibility to prepare for emergencies?

Zolol [24]

Answer:

local government agencies

5 0

3 years ago

We timed how long it took for the ball to travel 1 meter several times, so we could calculate an “average” time to use in the ve

damaskus [11]

We need to find the average speed of the ball during the motion of 1 m

In order to find that we took several reading and found following times to cover the distance of 1 m

t1 = 2.26 s

t2 = 2.38 s

t3 = 3.02 s

t4 = 2.26 s

t5 = 2.31 s

Now in order to find the average time we can write

$T_{mean} = \frac{t_1 + t_2 + t_3 + t_4 + t_5}{5}$

$T_{mean} = \frac{2.26 + 2.38 + 3.02 + 2.26 + 2.31}{5}$

$T_{mean} = 2.45 s$

So average time to cover the distance of 1 m by ball will be 2.45 s

here 3.02 s is not the average time but we can say it is the median of the readings of all possible values which we can not use in our calculation as average time

3 0

3 years ago