Help asap please!! An aluminum block of mass 12.00 kg is heated from 20 C to 118 C. If the specific heat of aluminum is 913 J-1
1 answer:
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Answer:
<em>1) 1.56 m/s</em>
<em>2) 1.11 m/s</em>
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Explanation:
The bus travels 6 blocks east and 8 blocks west
Each block is 100 m long
time taken to travel through this distance = 15 min
average speed of the bus = ?
the total blocks traveled = 6 + 8 = 14 blocks
total distance traveled = 14 x 100 m = 1400 m
time taken = 15 min = 15 x 60 sec = 900 sec
average speed of the bus = distance traveled/time taken
==> 1400/900 = <em>1.56 m/s</em>
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2) velocity = displacement/time taken
displacement is the shortest distance between the starting position and the final position of the bus.
The displacement of this bus will be the hypotenuse of the triangle formed by the motion of the bus
the distance traveled east = 6 x 100 = 600 m
the distance traveled north = 8 x 100 = 800 m
displacement = = 1000 m
The velocity of the bus = 1000/900 = <em>1.11 m/s</em>
The magnitude of the change in momentum of the stone is about 18.4 kg.m/s
Let's recall Impulse formula as follows:
<em>where:</em>
<em>I = impulse on the object ( kg m/s )</em>
<em>∑F = net force acting on object ( kg m /s² = Newton )</em>
<em>t = elapsed time ( s )</em>
Let us now tackle the problem!
<u>Given:</u>
mass of ball = m = 0.500 kg
initial speed of ball = vo = 20.0 m/s
final kinetic energy = Ek = 70% Eko
<u>Asked:</u>
magnitude of the change of momentum of the stone = Δp = ?
<u>Solution:</u>
<em>Firstly, we will calculate the final speed of the ball as follows:</em>
→ <em>negative sign due to ball rebounds</em>
<em>Next, we could find the magnitude of the change of momentum of the stone as follows:</em>
- Velocity of Runner : brainly.com/question/3813437
- Kinetic Energy : brainly.com/question/692781
- Acceleration : brainly.com/question/2283922
- The Speed of Car : brainly.com/question/568302
- Average Speed of Plane : brainly.com/question/12826372
- Impulse : brainly.com/question/12855855
- Gravity : brainly.com/question/1724648
Grade: High School
Subject: Physics
Chapter: Dynamics
