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3 years ago

Which ball has the greater acceleration at the instant of release?

Physics

1 answer:

yuradex [85]3 years ago

6 0

They're equal.

Ignoring air resistance, any object you're not holding onto has the same, constant acceleration ... 9.8 m/s^2 down ... from the moment it leaves your hand until the moment it hits the ground.

It doesn't matter how heavy the object is, and it doesn't matter whether you throw it up, down, or sideways, or just let go and let it drop.

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Which device converts electrical energy into kinetic energy?

andriy [413]

<h3>Answer;</h3>

Electric motor

<h3>Explanation;</h3>

Energy is the ability to do work. According to the law of conservation of energy, energy can not be created nor destroyed but can be changed from one form to another.
Changing energy from one form to another is done by devices we call transducers. These are elements that convert energy from one form to another.
In this case, electrical motor is an example of a transducer that converts electrical energy to kinetic energy. Electrical energy is supplied to a the motor which converts it to rotational energy or mechanical energy then to kinetic energy.

4 0

3 years ago

Read 2 more answers

Unless indicated otherwise, assume the speed of sound in air to be v = 344 m/s. You have a stopped pipe of adjustable length clo

faltersainse [42]

Answer:

Length of pipe $= 0.057$ meter

Explanation:

Speed of a transverse wave on a string

$v = \sqrt{\frac{F}{\mu} }$

where F is the tension in string and $\mu$ is the mass per unit length

Thus,

$\mu = \frac{m}{L}$

Substituting the given values we get -

$\mu = \frac{7.25 * 10^{-3}}{0.62}\\mu = 0.0117 \frac{Kg}{m}$

Speed of a transverse wave on a string

$v = \sqrt{\frac{4510}{0.0117} } \\v = 620.86 \frac{m}{s}$

For third harmonic wave , frequency is equal to

$f = \frac{nv}{2L}$

Substituting the given values, we get -

$f = \frac{3 * 620.86}{2 * 0.62} \\f = 1502.08$

Length of pipe

$L = \frac{nv}{4 f}$

Substituting the given values we get

$n = 1$ for first harmonic wave

$L = \frac{344* 1}{4*1502.08} \\L = 0.057$

Length of pipe $= 0.057$ meter

5 0

4 years ago

When the Sun is directly overhead, a hawk dives toward the ground with a constant velocity of 5 m/s at 60 degrees below the hori

Gemiola [76]

The shadow that will be protected on the ground will represent the hawk's horizontal position. therefore it will move at the hawk's horizontal velocity component, which is:
5*cos(60) = 2.5 m/s

6 0

4 years ago

Read 2 more answers

Which of the following statements describes the capabilities of an electroscope? Select all that apply.

Grace [21]

The applicable answer/s are

- Electroscopes can measure the amount and type of charge, not to explicit to only one but both. and it is not made of of insulating materials instead it is made up of conductive materias.

7 0

4 years ago

Read 2 more answers

A pair of parallel plates, forming a capacitor, are charged. The plates are pulled apart to double the original separation, the

polet [3.4K]

Answer:

The final energy will be halved of the original energy.

Explanation:

As we know that the capacitance,

C = εA/d

C = capacitance

A = area of plate

d = distance or separation between the plates

ε = permitivity of dielectric material

As you can see from the formula that the capacitance ( ability of the capacitor to store charge) is inversaly proportional to the separation of the plates. If all the other factors kept constant then increasing the distance between the plates will decrease the ability of the capacitor to store energy. So we can say that by doubling the separation, the capacitance or energy stored will become half.

4 0

3 years ago