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Colt1911 [192]
3 years ago
15

Is jewelry gold a compound or mixture?

Physics
2 answers:
USPshnik [31]3 years ago
7 0

I think it’s a mixture.

loris [4]3 years ago
4 0

Answer:

jewelry gold is a mixture.

Explanation:

it contains more than one element and its composition varies.

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A truck moves 30 km West, and then 40 km North, and then travels in a straight path back to its starting
SpyIntel [72]

Distance = (30+40+50) = 120 km

It's back where it started, so displacement = zero

7 0
3 years ago
A ball is thrown upward at time t=0 from the ground with an initial velocity of 8 m/s (~ 18 mph). What is the total time it is i
evablogger [386]

Answer:

The total time it is in the air for the ball is 1.6326 s

Given:

Initial velocity = 8 \frac{m}{s}

To find:

the total time it is in the air = ?

Formula used:

t = \frac{v-u}{a}

Where t = time to reach maximum height

v = final velocity of the ball = 0 m/s

u = initial velocity of ball = 8 m/s

a = acceleration due to gravity = -9.8

Acceleration of gravity is taken as negative because ball is moving in opposite direction.

Solution:

A ball is thrown upward at time t=0 from the ground with an initial velocity of 8 m/s.

The time taken by the ball to reach the maximum height is given by,

t = \frac{v-u}{a}

Where t = time to reach maximum height

v = final velocity of the ball = 0 m/s

u = initial velocity of ball = 8 m/s

a = acceleration due to gravity = -9.8

Acceleration of gravity is taken as negative because ball is moving in opposite direction.

t = \frac{0-8}{-9.8}

t = 0.8163 s

Thus, time taken by the ball to reach the ground again = time taken to reach maximum height

So, Total time required for ball to reach ground = 2t = 2 × 0.8163

Total time required for ball to reach ground = 1.6326 s

The total time it is in the air for the ball is 1.6326 s

4 0
3 years ago
HELP PLEEAAAASSSEEEEEEE What is the definition of net force?
aleksley [76]

Answer:

the sum of all force being applied to an object.

Explanation:

8 0
3 years ago
Using calcium’s atomic structure, as shown in the image, what is this element’s atomic number?
ElenaW [278]

Answer:

Atomic number of calcium is 20.

6 0
3 years ago
Why earth have gravity​
enot [183]

Answer:

Because it has mass.

Explanation:

8 0
2 years ago
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