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Nadya [2.5K]
2 years ago
12

Deaths due to lifestyle diseases have declined since the early 1900s. T F

Physics
1 answer:
zavuch27 [327]2 years ago
7 0

Answer:

<h2>False</h2>

Explanation:

Hope this helps! Please consider marking brainliest! Always remember, your smart and you got this! -Alycia :)

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A system of pulleys is used to raise a load of bricks that weighs 1,700 newtons. The force applied to the pulley is 340 newtons.
Law Incorporation [45]
By definition, we have that the mechanical advantage is given by the following equation:
 MA =  \frac{W}{T} &#10;
 Where,
 W: is the load
 T: is the tension
 Substituting the values in the given equation we have:
 MA = \frac{1700}{340}
 MA = 5&#10;
 Therefore, the mechanical advantage is equal to 5.
 Answer:
 The mechanical advantage of this machine is:
 MA = 5
4 0
3 years ago
Read 2 more answers
Answer these questions plz​
lozanna [386]

1. The property of a conductor by virtue of which it posses the flow of electric current through it is called resistance.

2. The resistance of a conductor depends on the cross sectional area of the conductor and it's resistivity.

3.This id due to the fact that the resistance of a wire is inversely proportional to the square of its diameter.

4.Due to at high temperatures , the alloy donot oxidize. Alloy doesn't melt readily and get deformed.

8 0
3 years ago
Muscles that are fatigued ____. A. Are injured , B. Should always be rested , C. Can sometimes be exercised further D. Should be
Lorico [155]

Answer:

<u>B. Should be rested</u>

Explanation:

That is the only reasonable answer.

5 0
3 years ago
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Which structure found in echinoderms can sometimes perform a similar function as a radula found in some mollusks? This Is A Scie
hammer [34]
I think it’s D which is the stomach if not I can get you someone that can help you
6 0
2 years ago
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A stone is thrown from the top of a building 30m high. If it strikes the ground at an angle 45, with what speed was it thrown?
sasho [114]

Answer:

24.2 m/s

Explanation:

The stone strikes the ground at an angle of 45 degrees: this means that its vertical velocity is equal (in magnitude) to its horizontal velocity, in fact:

tan \theta = \frac{|v_y|}{v_x}\\tan 45^{\circ} = 1 \rightarrow |v_y| = v_x

The motion along the vertical direction is a uniformly accelerated motion, so we can find the final vertical velocity using the following suvat equation

v_y^2 -u_y^2 = 2as

where

v_y is the final vertical velocity

u_y = 0 is the initial vertical velocity (zero because the stone is thrown horizontally)

a=g=9.8 m/s^2 is the acceleration of gravity (we take downward as positive direction)

s = 30 m is the vertical displacement

Solving for vy,

v_y = \sqrt{u_y^2+2as}=\sqrt{0+2(9.8)(30)}=24.2 m/s

This means that the horizontal velocity is also 24.2 m/s: and since the horizontal velocity is constant during the whole motion (there is no acceleration in the horizontal direction), this means that the stone was thrown exactly at 24.2 m/s.

7 0
3 years ago
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