Explanation:
0.566kg *(1mol/0.197 kg)= 2.87 mol gold
note how the units cancel out, if the units do not cancel out (kg/kg=1) then u did something wrong
This quantity ρ is known as the density<span> , which is usually defined as the mass per unit volume: ρ = m/V. The volume units milliliter (mL) and cubic centimeter (cm</span>3<span>) are almost identical and are commonly used interchangeably. The general meaning of </span>density<span> is the amount of anything per unit volume.</span>
Answer:
Car A is not accelerating, but car B is accelerating
Explanation:
Car A is not accelerating because , it is moving with uniform speed in a particular direction . Therefore its velocity too is not changing .
But car B is accelerating because , though its speed is uniform but its velocity is changing due to change in direction . On a circular path , direction of speed changes every moment . Therefore it has an acceleration called centripetal acceleration . Hence car B has acceleration.
Answer: An object undergoing uniform circular motion is moving
Explanation:
The amount of kinetic energy that will be gained from the particle as it moves from point B to point A is 12U₀.
Since the particle moves through in a projectile path (trajectory). The gravitational potential energy acts on the particle in the downward direction.
A resistive force refers to a force that resists and acts in the direction opposite to the velocity of a body.

where:
- resistive force
= 12 F
Recall that;
- the gravitational potential energy is constant;
- the kinetic energy at point A from B = U₀
∴
When the particle is launched from B to A, the kinetic energy gained by the particle can be computed as:
- U =

- U = 12 F × r
- U = 12 U₀
Learn more about kinetic energy here:
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