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>
A) gneiss
Explanation:
The likely rock that would be found here is gneiss.
A rock type that forms under a great deal of temperature and pressure is a metamorphic rock.
Such rocks would have their minerals crystallized when subjected to these extreme conditions.
- Metamorphic rocks are changed rocks that are formed when minerals in rocks are subjected to extreme pressure and temperature before they start melting.
- These rock type can form from either sedimentary or igneous rocks. In fact a metamorphic rock can also change into another one.
- Examples of metamorphic rocks are gneiss, schist, hornfels, marble etc.
Halite, limestone and sandstone are examples of sedimentary rocks that forms by the accumulation of sediments or precipitation of ions form solutions.
learn more:
Metamorphic change brainly.com/question/869769
#learnwithBrainly
Answer:
Option A
The four major tasks of the digestive system are - Ingestion, Digestion, Absorption, Elimination
Explanation:
A digestive system has primarily four main functions
a) Motility - In this the food is ingested through opening in the form of mouth and then it starts moving from the mouth via esophagus to the stomach
b) Digestion - In the stomach, the food gets digestion and then it is passed on to the intestine
c) Absorption - In the small intestine essential nutrients and water is absorbed
b) Secretion - The waste remaining after intestine digestion is passed on to the rectum for secretion
Hence, option A is correct
(a) The pitcher must throw the ball at 27.7 m/s
The momentum of an object is given by:

where
m is the mass of the object
v is the object's velocity
Let's calculate the momentum of the bullet, which has a mass of
m = 2.70 g = 0.0027 kg
and a velocity of

Its momentum is:

The pitcher must throw the baseball with this same momentum. The mass of the ball is
m = 0.146 kg
So the velocity of the ball must be

So, the pitcher must throw the ball at 27.7 m/s.
(b) a. The bullet has greater kinetic energy
The kinetic energy of an object is given by

where m is the mass of the object and v is its speed.
For the bullet, we have:

For the ball:

So, the bullet has greater kinetic energy.
Answer:
The mmf required is
×
A
Explanation:
The Magnetomotive force (mmf) is given by the formula below

where
is the Magnetomotive force (mmf)
is the Magnetic field strength
is the magnetic length
The magnetic permeability μ is given by
μ = 
Where
is the Magnetic flux density
and
is the Magnetic field strength
From the question,
= 1.2Wb/m^2
μ = 1600m
From μ = 
∴
μ

×
A/m
Now, for the Magnetomotive force (mmf)

From the question
= 1.5 m
∴
×
× 
×
Hence, The mmf required is
×
A