Answer:
1.48 kg
Explanation:
The conservation of energy states that energy cannot be created or destroyed but can be converted from one form to another. Hence, in this case, energy lost by the copper should equal to the energy gained by the lead. Hence,
Energy Lost by Copper = Energy Gained by Lead
mcT = <em>mcT </em>(Bolded is for copper, italicised is for lead)
m(387)(88.4 - 55.9) = <em>(3.50)(128)(55.9 - 14.4)</em>
12577.5m = <em>18592</em>
<em> </em><u>m = 1.48 kg (3 sf)</u>
<em>(Note: Thermal energy can be calculated using </em><em>Q = mcT</em><em> where </em><em>m</em><em> is the </em><em>mass</em><em>, </em><em>c</em><em> is the </em><em>specific heat capacity</em><em> and </em><em>T</em><em> is the </em><em>change in temperature</em><em>)</em>
Angular Momentum = tangent velocity X Radius X Mass
2.0m/s X 2.0 X 43kg
172 m kg / s
Answer:
This is because, when an object which has possessed kinetic energy under its being in motion hits another object, which is stationary the object at rest receives part of the energy inherent in the body which has kinetic energy and expresses the received energy in the form of motion or some forms different from the initial stationary position.
Explanation:
Answer:
d = 23.75 m
The zebra has gone 23.75m after 5 seconds.
Corrected question;
A zebra starts from rest and accelerates at 1.9 m/s2. How far has the zebra gone after 5 seconds.
Explanation:
From the equation of motion;
d = vt + 0.5at^2 .........1
Where;
d = displacement
v = initial velocity = 0
t = time taken= 5 seconds
a = acceleration = 1.9 m/s^2
Substituting the given values into equation 1;
d = 0(5) + 0.5(1.9×5^2)
d = 0.5(1.9×5^2)
d = 23.75 m
The zebra has gone 23.75m after 5 seconds.
In vacuum, going at 2.99×10^8 m/s.
