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3 years ago

As an object increases its speed, its kinetic energy

Physics

1 answer:

Juliette [100K]3 years ago

6 0

Answer:

Increase

Explanation:

Kinetic energy is the energy of motion--so the overall energy of that object would increase. Kinetic energy of an object is directly proportional to the square of its speed.

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You can speed up a chemical reaction by using a recyclable substance called areactant

Vilka [71]

The answer is True. You can speed up chemical reactions by using a recyclable substance called a reactant.

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3 years ago

Read 2 more answers

You are a project manager for a manufacturing company. One of the machine parts on the assembly line is a thin, uniform rod that

ra1l [238]

Answer:

a) $I=0.012\ kg.m^2$

b) $I=0.012\ kg.m^2$

Explanation:

Given that:

mass of rod, $m=0.4\ kg$

length of the rod, $l=0.6\ kg$

(a)

Moment of inertia of rod about its center and perpendicular to the rod is given as:

$I=\frac{1}{12} m.l^2$

$I=\frac{1}{12} 0.4\times 0.6^2$

$I=0.012\ kg.m^2$

(b)

Moment of inertia on bending the rod to V-shape of 60 degree angle and axis being perpendicular to the plane of V at the vertex.

We treat it as two rod with axis of rotation at the end and perpendicular to the plane of rotation. 

So, the mass and the length of the rod will become half of initial value.

$I=I_1+I_2$

$I=\frac{1}{3} \frac{m}{2} (\frac{l}{2})^2 +\frac{1}{3} \frac{m}{2} (\frac{l}{2})^2$

$I=2[ \frac{1}{3}\times 0.2\times 0.3^2]$

$I=0.012\ kg.m^2$

7 0

3 years ago

Light travels at a speed of 3.00 x 10^11 cm/s. What is the speed of light in kilometers/hour?

rewona [7]

As 1 km = 1000 m = 1000,00 cm,

So, 1 cm = (1/1000,00) km

1 hour = 60 × 60 s = 3600 s

So, 1 s = (1 / 3600) hour

The light travels at a speed of $3.00 \times 10^{11} \ cm/s$ .

In kilometer/hour,

$3.00 \times 10^{11} \ cm/s = 3.00 \times 10^{11} \frac{(1/1000,00) km}{ (1 / 3600) hour} = 108 \times 10^8 \ km/hour$

4 0

4 years ago

A source of emf is connected by wires to a resistor, and electrons flow in the circuit. The wire diameter is the same throughout

Zina [86]

Answer:

C. the same.

Explanation:

The drift speed of electrons in a circuit is the same all through the circuit.

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3 years ago

A rock held above the ground has potential energy. As the rock falls, this potential energy is converted to kinetic energy. Fina

ioda

Answer:

By the law of conservation of mechanical energy, in the absence of any drag, when the rock falls towards the ground, the potential energy gets converted to kinetic energy. Once the rock hits the ground, it does not move. This is because, the energy is dissipated as sound or heat (to the environment). The total energy remains conserved. Only the form of energy changes.

6 0

3 years ago