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4 years ago

Identify two types of simple machines in this compund machine.

Physics

2 answers:

sleet_krkn [62]4 years ago

4 0

the answer would be "screw and lever!", thats the answer because the middle is made into a rod of metal rapped in metal to screw into the cork, and the lever part is the two handles on the side to lift it out of the bottle.

Lemur [1.5K]4 years ago

4 0

The answer should be a screw and lever

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What is the difference between radial acceleration and tangential acceleration and how do you calculate both of these accelerati

sergey [27]

Answer:

Tangential acceleration is in the direction of velocity - along the circumference of a circle if the object is undergoing circular motion

a = (V2 - V1) / T

Radial acceleration is perpendicular to the direction of motion if the object is not moving in a straight line (perhaps along the circumference of a circle)

a = m V^2 / R = m ω^2 R where R is the radius vector of the velocity - note that the Radius vector is directed from the center of motion to the object and for circular motion would be constant in magnitude but not in direction

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2 years ago

What is the source of energy in the food chain

Aleksandr [31]

Answer:

The first source of energy in a food chain is producer.

Explanation: In the food chain, the producer will be a plant that a primary consumer, a herbivore eats. The herbivore gets eaten by a secondary consumer, carnivorous. When the carnivore dies, it becomes energy for a decomposer.

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3 years ago

Suppose you walk 11 m in a direction exactly 24° south of west then you walk 21 m in a direction exactly 39° west of north. 1) H

DENIUS [597]

Answer:

(1) 42.94 m

(2) $16.02^\circ$

Explanation:

Let us first draw a figure, for the given question as below:

In the figure, we assume that the person starts walking from point A to travel 11 m exactly $24^\circ$ south of west to point B and from there, it walks 21 m exactly $39^\circ$ west of north to reach point C.

Let us first write the two displacements in the vector form:

$\vec{AB} = (-11\cos 24^\circ\ \hat{i}-11\sin 24^\circ\ \hat{j})\ m =(-10.05\ \hat{i}-4.47\ \hat{j})\ m\\\vec{BC} = (-21\sin 39^\circ\ \hat{i}+21\cos 39^\circ\ \hat{j})\ m =(-31.22\ \hat{i}+16.32\ \hat{j})\ m$

Now, the vector sum of both these vectors will give us displacement vector from point A to point C.

$\vec{AC}=\vec{AB}+\vec{BC}\\\Rightarrow \vec{AC}=(-10.05\ \hat{i}-4.47\ \hat{j})\ m+(-31.22\ \hat{i}+16.32\ \hat{j})\ m\\\Rightarrow \vec{AC}=(-41.25\ \hat{i}+11.85\ \hat{j})\ m$

Part (1):

the magnitude of the shortest displacement from the starting point A to point the final position C is given by:

$AC=\sqrt{(-41.25)^2+(11.85)^2}\ m= 42.94\ m$

Part (2):

As the vector AC is coordinates lie in the third quadrant of the cartesian vector plane whose angle with the west will be positive in the north direction.

The angle of the shortest line connecting the starting point and the final position measured north of west is given by:

$\theta = \tan^{-1}(\dfrac{11.85}{41.27})\\\Rightarrow \theta = 16.02^\circ$

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3 years ago

decibels are a measure of sound on a logarithmic scale, where the number in front of the zero represents the number of powers of

Korolek [52]

The power ratio of a washing machine at 80 decibels is 10⁸ or 100,000,000.

<h3>What is the power ratio of a sound of 80 decibels?</h3>

Sound is a form of disturbance created by the vibrations of the medium and which travels across the medium in wave form.

A measure of sound intensity is decibels.

Decibels are a measure of sound on a logarithmic scale, where the number in front of the zero represents the number of powers of 10.

Therefore, the power ratio of a washing machine at 80 decibels will be 10⁸.

In conclusion, sound are vibrations which transmit energy.

Learn more about sound at: brainly.com/question/1199084

#SPJ1

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2 years ago

A dialogue between two friends discussing about teej

liq [111]

"Holy cow ! Can you believe it, Lakshmi ? ! Here it is almost Shraavana again. Soon the rains will be blowing and the Teej will be biting. Let's sing, dance, and pray together while it's still so nice outside."

"OK, Priya. Great idea. Count me in. Let's go."

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3 years ago