3 years ago

On Earth's surface, the weight of an object equals the product of its mass and _____.

Physics

1 answer:

Lilit [14]3 years ago

6 0

F. The magnitude of the net force acting on the object.

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Some compounds, like carbon dioxide, are gaseous at room temperature, while others are solid at room temperature. Why is this?

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nalin [4]

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3 years ago

a object with a mass of 70 kilograms is supported at a height 8 meters above the ground.what's the potential energy of the objec

Agata [3.3K]

Potential Energy = mgh,

where m = mass in kg, g ≈ 10 m/s², h = height above ground = 8 m

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3 years ago

The opening to a cave is a tall, 30-cm-wide crack. A bat that is preparing to leave the cave emits a 30 kHz ultrasonic chirp. Ho

sweet-ann [11.9K]

Answer:

Width of sound beam is 7.557 m

Explanation:

First we will calculate the wave length from given data:

λ=v/f

Were:

v is the speed

f is the frequency

$\lambda=\frac{340}{30*10^3}\\ \lambda=0.01133 m$

We considered the opening long and narrow, Using single slit diffraction formula:

mλ=dsinΘ

where:

d is the crack width

m is the order

Θ is angle

Considering m=1, The angle between first minimum from center of beam is:

$\theta=sin^{-1}(\frac{m\lambda}{d})\\\theta=sin^{-1}(\frac{1*0.01133}{30*10^{-2}})\\ \theta=2.164^o$

The width of beam is:

tanΘ=y/L

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Width=7.557 m

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3 years ago

Which of the following describes resistance force?

Harman [31]

I am pretty sure that<span> the following which describes resistance force is the fourth option from the scale represented above : </span>D .force applied by the machine to overcome resistance. I choose this due to the Newton's 3rd law, as the<span> force that shoul be overcome by a machine before it perform its usual work. Do hope you will find it helpful! Regards!</span>

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3 years ago

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