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3 years ago

Gold can be found in native or pure state in nature, why

Physics

1 answer:

alexandr402 [8]3 years ago

5 0

Answer:

Gold metal is a noble metal,i.e.,it is a non-reactive metal. As such,it does not form compounds with any other elements naturally. So it is found in its native or pure state in nature.

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Jose is batting for the home team when he hits a foul ball that rises straight up over home plate. A fan in the stands notices t

andreyandreev [35.5K]

Answer:

Explanation:

Given maximum height reached by the ball as H = 40 metres

Since the ball rises straight up when hit by a ball, then the angle of launch will be perpendicular to the ground and that is 90°.

To determine the upward speed of the ball in meters per second after it got struck by the bat, we will use the formula for calculating the maximum height according to projectile motion;

Maximum Height H = $\frac{u^2sin^2\theta}{2g}$ where;

u is the speed of the ball

$\theta$ is the angle of launch

g is the acceleration due to gravity = 9.81m/s²

Substituting the given parameters into the formula;

$40 = \frac{u^2sin^2(90)}{2(9.81)}\\ \\40 = \frac{u^2}{2(9.81)}\\ \\40 = \frac{u^2}{19.62} \\cross\ multiply\\\\u^2 = 40*19.62\\u^2 = 784.8\\u = \sqrt{784.8}\\ u = 28.01 m/s$

<em>Hence the upward speed of the ball in meters per second after it got struck by the bat is 28.01m/s.</em>

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3 years ago

Please help on this one?

Nadya [2.5K]

I suppose the answer would be C. Kepler's three laws talk about planetary orbit.

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2 years ago

Read 2 more answers

A bronze statue weighs 1200 N and has a base of 2m^2. What is the pressure the statue

notka56 [123]

Answer:

Explanation:

P = F/A

F = 1200 N

A = 2 m^2

P = 1200N/2 m^2

P = 600 N / m^2

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2 years ago

The temperature of a 2.0-kg block increases by 5°C when 2,000 J of thermal energy are added to the block. What is the specific h

Nadya [2.5K]

Heat = m x c x Δθ
2000 = 2 x c x 5
Specific heat c = 200 J / Kg / C

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2 years ago

A pair of fuzzy dice is hanging by a string from your rearview mirror. while you are accelerating from a stoplight to 28 m/s in

Lerok [7]

We can use the formula of motion in physics (2nd law od newton) in this problem:
x direction: Fsin ∅ = ma
y direction: Fcos ∅ -mg = 0
∅ is equal to sin ∅ / cos ∅ or x/y
tan ∅ = ma / mg = a /g

Applying acceleration formula:
v = vo + at ; 28 = 0 + 6a ; a = 4.67 m/s^2
∅ = tan-1 (a/g) = tan-1 (4.67/9.81) = <span>25.4 degrees.</span>

4 0

2 years ago

Gold can be found in native or pure state in nature, why​

Gold can be found in native or pure state in nature, why