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3 years ago

Why it is not advisable for soldiers to march across the bridge in rythm

Physics

1 answer:

Musya8 [376]3 years ago

7 0

Answer:

Marching soldiers are cautioned to break stride on a bridge, lest they match the bridge's frequency of vibration. ... A force that's applied to an object at the same frequency as the object's natural frequency will amplify the vibration of the object in an occurrence called mechanical resonance.

Explanation:

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How do various factors affect climent

Svetllana [295]

Answer:

The factors affecting climate are latitude, altitude, land and water distribution, distance from the sea, distance from the sun, prevailing winds and ocean currents, surface covering the land, volcanism, solar constant sunspots, wind direction and nature of mountain chains, mountain barriers.

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3 years ago

Read 2 more answers

URGENT!! ILL GIVE BRAINLIEST! AND 100 POINTS

lubasha [3.4K]

The inertia with the speed of 2.9 m/s has moved a distance of 3.6 kilometers in the west direction and 2.35 kilometers in the north direction.

<h3>What are trigonometric ratio?</h3>

In mathematics, the trigonometric functions are real functions which relate an angle of a right-angled triangle to ratios of two side lengths. They are widely used in all sciences that are related to geometry, such as navigation, solid mechanics, celestial mechanics, geodesy, and many others.

Given:

Speed of the speed 2.9 m/s

The direction in which the inertia change is moving = 43° north west.

Time taken to travel the distance = 30 minutes

According to the question that is moving in a Northwest direction with a velocity of 2.9 m per second.

If you want to find the distance it has moved in either North or west direction you will first have to find the total distance that kayak has moved in 30 minutes.

The distance travel by the kayak in 30 minutes = speed of person × time taken

The distance travel by the person in 30 minutes = 2.9 × 30 × 60

The distance travel by the person in 30 minutes = 5220 metre

The distance travel by the person in 30 minutes = 5.22 km

The distance traveled in the west direction can be find using trigonometric ratio.

5.2 × sin 43 = The distance traveled in the west direction

The distance traveled in the west direction = 3.6 kilometers

The distance traveled in the west = cos 43 × 5.2

The distance traveled in the west = 2.35 km

Therefore, The person with the speed of 2.9 m/s has moved a distance of 3.6 kilometers in the west direction and 2.35 kilometers in the north direction.

Learn more about the trigonometric ratio here:

brainly.com/question/26719838

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6 0

2 years ago

Two identical ice hockey pucks, labeled A and B, are sliding toward each other at speed v. Which one of the following statements

ollegr [7]

Answer:

C. $p_{A} = -p_{B}$ and $K_{A} = K_{B}$ .

Explanation:

The two hockey pucks travels in opposite sides with velocities of same magnitude, by definitions of linear momentum and translational kinetic energy:

Linear momentum

Hockey puck A

$p_{A} = m\cdot v$ (1)

Hockey puck B

$p_{B} = -m\cdot v$ (2)

$p_{A} = -p_{B}$

Translational kinetic energy

Hockey puck A

$K_{A} = \frac{1}{2}\cdot m\cdot (v)^{2}$

$K_{A} = \frac{1}{2}\cdot m \cdot v^{2}$ (3)

Hockey puck B

$K_{B} = \frac{1}{2}\cdot m\cdot (-v)^{2}$

$K_{B} = \frac{1}{2}\cdot m \cdot v^{2}$ (4)

$K_{A} = K_{B}$

Hence, the correct answer is C.

7 0

3 years ago

Name two kinds of longitudinal waves and explain how you know they are longitudinal.

dezoksy [38]

A transverse wave and a longitudinal wave.

Transverse:wave particles move at medium speed in perpendicular to the direction that the waves move

Longitudinal:wave particles move at medium speed in parallel to the direction that the wave moves

Hope this helps ^-^

8 0

3 years ago

What challenges are faced by scientist investigating effects of radiation in Chernobyl and Eniwetok Atoll in the Chernobyl accid

Andrew [12]

Answer:

The health hazard of directly going to these places to take direct readings and observations.

Explanation:

The Chernobyl accident was a catastrophic radioactive accidents, with an immediate fatal effect on some victims (mostly firemen and law enforcement officers). Scientists investigating the effects of the radiation left on the venues of the accident face a health risk if they intend to carry out a full scale on-field testing and experiment. Some of the relocated occupants of these places, that have long been relocated, have shown some health effect of the radiation. And scientist studying and working on these places for too long stand a risk of developing health complications if they are exposed to the radiations for too long.

8 0

4 years ago

Why it is not advisable for soldiers to march across the bridge in rythm​

Why it is not advisable for soldiers to march across the bridge in rythm