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strojnjashka [21]
3 years ago
5

Which of the following is not a natural resource of light

Physics
1 answer:
marta [7]3 years ago
8 0

Answer: Oil lamps are NOT a natural resource of light.

Explanation: Oil lamps have to be lit and do not give off light themselves. You have to make them and light them for them to give light.

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A projectile is fired at an upward angle of 29.7° from the top of a 108-m-high cliff with a speed of 130-m/s. What will be its
german

Answer:

79.2 m/s

Explanation:

θ = angle at which projectile is launched = 29.7 deg

a = initial speed of launch = 130 m/s

Consider the motion along the vertical direction

v₀ = initial velocity along the vertical direction = a Sinθ = 130 Sin29.7 = 64.4 m/s

y = vertical displacement = - 108 m

a = acceleration = - 9.8 m/s²

v = final speed as it strikes the ground

Using the kinematics equation

v² = v₀² + 2 a y

v² = 64.4² + 2 (-9.8) (-108)

v = 79.2 m/s

5 0
3 years ago
A) The motor speed is less than wheel speed.
n200080 [17]

For the following statements

A) The motor speed is less than wheel speed.

B) The output power of the motor is positive during hill climbing.

C) The wheel torque is more than motor torque

These assertions are given respectively as

  • false
  • true
  • false
<h3>What are speed, power, and Torque?</h3>

Speed: defined as the ratio of operation with respect to distance and time

Power: defined as the ability to work

Torque: This is the speed of a rotating object

Generally, the equation for Speed, Power, Torque  is mathematically given as

V=m/s

P=w/t

T=rfsin\theta

In conclusion

For a moving car, the wheels speed is in equilibrium with the motor speed Hence false

The output power during a hill climb is positive cause work is been done, Hence true

The wheel torque also is in equilibrium with the motor Torque, Hence false

Read more about Work

brainly.com/question/756198

5 0
3 years ago
What are the characteristics of open pit mining
Ostrovityanka [42]

Answer:

The dominant feature in an open pit or quarry operation is the pit, a broad, deepened, often funnel-shaped area where overburden has been removed to access the material to be mined. This is where material extraction takes place.

Explanation:

<em>Read </em><em>my </em><em>bio </em><em>:</em><em>)</em>

4 0
3 years ago
According to the law of conservation of energy, how will the sum of the kinetic
Margaret [11]

Answer:

I think that this ans may help you

3 0
3 years ago
A student reacted calcium with carbon to form a compound. The calcium atoms transferred electrons to the carbon atoms. The compo
frozen [14]

Answer:

Ionic.

Explanation:

To know the the correct answer to the question given above, let us define the terms covalent and ionic.

Covalent is the term used to characterise a compound which is formed by sharing of electrons between the atoms involved. Thus, the compound formed is called covalent compound.

Ionic is the term used to characterise a compound formed when there is a transfer of electron(s) from the metallic atom to the non-metallic atom. The compound formed is called ionic compound.

Considering the question given above, since the calcium atom transfer electron(s) to the carbon atom, it means the compound is an ionic compound.

6 0
3 years ago
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