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ella [17]
3 years ago
15

Can someone please help, ty!! (Will mark brainliest)

Physics
1 answer:
Alexxandr [17]3 years ago
3 0
28 is balanced and unbalanced
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Determine the kinetic energy of 650 kg roller coaster car that is moving with a speed of 20.0 miles per second?
mestny [16]

Answer:Ek=673.109 kJ

Explanation:

Use equation for Kinetic energy: Ek=m*V²/2

m=650 kg (mass of roller coaster)

V=20.0Miles/s=20.0*1.609m/s=32.18m/s

Ek=m*V²/2

Ek=650kg*(32.18m/s)²

Ek=(650kg*1053.55m²/s²)/2

Ek=673 108.8 J

Ek=673.109 kJ

4 0
3 years ago
What is the difference between sounds that have the same pitch and loudness?
eduard
Sounds that have the same pitch and loudness can be differentiated by intensity and tone.
8 0
3 years ago
Read 2 more answers
Measuring the size of a specific object might include which of these SI units?
defon

D. Meter, Kilogram

Explanation:

  • There are certain units for the measurements things which are around us.
  • This is the SI units for the measurement of the size of the objects.
  • SI units are international unit systems, they are one who accepted around the world.
  • It is called the International System of Units, used to expresses the phenomenon happens around us in a scientific method
  • Here, the meter is the unit for Length in the International System of Units and Kilogram is to represent the mass of the object in SI units system.
3 0
4 years ago
Which two things does force depend on?​
saveliy_v [14]

Answer:

Mass and Gravity

Explanation:

Objects with mass exert forces on each other via the force of gravity. This force is proportional to the mass of the two interacting objects and is inversely proportional to the square of the distance between them.

3 0
3 years ago
You want to reduce your energy bills.
aleksandr82 [10.1K]

Answer:

A. 100 Watts

B. 12 Watts

C. the first bulb

Explanation:

A. The formula for power is Work done/time

6000J/60seconds = 100J/s or 100W

B. Another formula for power is Current * Voltage

0.05*240 = 12W

6 0
3 years ago
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