Answer:
Electrical energy is answer
Explanation:
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The final velocity of the ball that is dropped from a height of 200m is v = 44.73 m/s .
<h3>What is velocity with example?</h3>
The rate at which an object is travelling in one direction is referred to as its velocity. an automobile traveling north on a highway, or a rocket taking off. Its velocity vector's absolute value always is equal to the motion's speed because it is a scalar.
<h3>Briefing:</h3>
Given the initial velocity of the ball (u) = 0
Distance travelled by the ball (s) = 200m
Acceleration (a) = 10 m/s²
As we know:
v² = u² + 2as
Putting values:
v² = 0+2 × (10 m/s²) × (200 m)
v = 44.73 m/s.
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Answer:
Mass = 873.6kg = 0.874 × 10^3 kg
Order = 3
Question:
Compute the order of magnitude of the mass of a bathtub half full of pennies.(Assume the pennies are made entirely of copper and the tub measures 1.3 m by 0.5 m by 0.3 m)
Explanation:
Given:
Dimensions of the tub = 1.3 m by 0.5 m by 0.3 m
Density of copper d = 8960kg/m^3
Mass = volume × density
Volume of tub = L×B×H = 1.3 × 0.5 × 0.3 = 0.195m^3
Since the tub is half full:
V = 0.195/2 = 0.0975m^3
Mass = 8960kg/m^3 × 0.0975m^3
Mass = 873.6kg = 0.874 × 10^3 kg
Order = 3
Note: Order of magnitude is of the form:
N = a × 10^b
Where;
b = order of magnitude
and
1/√10 </= a < √10
Answer:
Explanation:
<em>Assuming that the thermal expansion of brass cube occurs isotropically (i.e. equal in all the directions).</em>
Given:
- length of the cube,
- change in temperature of the cube,
- coefficient of volume expansion,
<u>Hence volume of the cube:</u>
Now the volume of the cube after expansion:
Therefore,
<u>Now the percentage change in the edges of the cube:</u>
Answer:
a. 2.856 x 10^-6 m³
b. 0.288 J
c. 971.88 J
d. 971.592 J
Explanation:
d) The change in internal energy of the cube.
Note: For Copper -
B(beta)= 5.1 × 10^-3 (C)^-1
Cp = 390J/Kg.K
p (Rho) = 8.90 × 10³Kg/m³
Detailed solution is attached below
