A circular disk of radius 2.0 m rotates, starting from rest, with a constant angular acceleration of 20.0 rad/s2 . What is the tangential acceleration of a point on the edge of the disk at the instant that its angular speed is 1.0 rev/s

The tangential acceleration of a point on the edge of the disk at the instant that its angular speed is 1.0 rev/s is 40m/s²

The formula for calculating the tangential acceleration is expressed as:

Given the following parameters:

Substitute the given parameters into the formula;

Hence the tangential acceleration of a point on the edge of the disk at the instant that its angular speed is 1.0 rev/s is 40m/s²

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  a = 40 m / s²

Explanation:

This is a kinematics problem, where we must use both linear and angular and the relationship between them

we'll eat by reducing the angular velocity to units if

      w = 1.0 rev / s (2pi rad / 1 rev) = 2pi rad / s

they ask us for linear acceleration, we use the relationships between linear or angular variables

       a = α R

       a = 20  2

       a = 40 m / s²

specific latent heat of fusion, lf, of a substance is defined as the amount of heat required to change a unit mass of the substance from solid to liquid state, without any change in the temperature.

explanation:

  1.the balanced   chemical equation is as below

cu +   2 ag(no)₃ → cu(no₃)₂   +2 ag

2.the   much silver   produced   is   50.9 g

step 1: find the   moles of cu

moles =   mass÷   molar mass

  from periodic table the molar mass of cu = 63.5 g/mol

moles is therefore = 15.00 g÷ 63.5 g/mol = 0.236   moles

step 2: use the mole ratio to determine the   moles of ag

from equation above   cu: ag   is 1: 2

therefore the moles of ag   =0.236   moles   x 2/1 =0.472   moles

step 3: find the mass   of ag

mass = moles x molar mass

from periodic table   the molar mass of ag =107.87 g/mol

mass   = 0.472   moles x 107.87 g/mol = 50.9 g

3.   the   much   silver   collected worth is   1.797 oz

  convert   50.9 g   to oz

that is   1 gram = 0.0353 oz

          50.9 grams =?   oz

by cross multiplication

={(50.9 grams x 0.0353 oz) / 1   gram}   =1.797 oz