Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 4: Q3Q (page 82)

When Paris was shelled from 100 km away with the WWI long-range artillery piece “Big Bertha,” the shells were fired at an angle greater than to give them a greater range, possibly even twice as long as at 45º. Does that result mean that the air density at high altitudes increases with altitude or decreases?

Short Answer

Expert verified

At higher altitudes air density decreases.

Step by step solution

01

Given information:

θ=45o

d=100km

02

Understanding the given information

The problem is based on the projectile of an object. A projectile is an object upon which the only force acting is gravity. An object dropped from rest is a projectile (provided that the influence of air resistance is negligible).

03

To The magnitude of Betty’s force.

When the launch angle of the projectile increases that means it will move at a higher altitude. In light of the fact that shooting the shell at a larger angle increases its horizontal range, it follows that the shell moves more quickly at higher altitudes than at lower ones.

This indicates that at greater altitudes than at lower altitudes, the shell encounters less air resistance.

This indicates that at higher altitude air density decreases as you ascend.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

An airport terminal has a moving sidewalk to speed passengers through a long corridor. Larry does not use the moving sidewalk; he takes 150s to walk through the corridor. Curly, who simply stands on the moving sidewalk, covers the same distance in 70s. Moe boards the sidewalk and walks along it. How long does Moe take to move through the corridor? Assume that Larry and Moe walk at the same speed.

Figure 4-53 shows the straight path of a particle across a x-ycoordinate system as the particle is accelerated from rest during time interval ∆t1. The acceleration is constant. Thecoordinates for point B are (12.0m,18.0m); those for pointare (a) What is the ratio ay/axof the acceleration components? (b) What are the coordinates of the particle if the motion is continued for another interval equal to ∆t1?

Two seconds after being projected from ground level, a projectile is displaced40mhorizontally and 53mvertically above its launch point. What are the (a) horizontal and (b) vertical components of the initial velocity of the projectile? (c)At the instant the projectile achieves its maximum height above ground level, how far is it displaced horizontally from the launch point?

In Fig. 4-54, a lump of wet putty moves in uniform circular motion as it rides at a radius of 20.0cmon the rim of a wheel rotating counterclockwise with a period of 5.00 ms .The lump then happens to fly off the rim at the 5 o’clock position (as if on a clock face). It leaves the rim at a height of h=1.20m from the floor and at a distance d=2.50 m from a wall. At what height on the wall does the lump hit?

The position vector r→=5.00ti^+(et+ft2)j^locates a particle as a function of time. Vector r→is in meters, tis in seconds, and factors e and f are constants. Figure 4-31 gives the angle θof the particle’s direction of travel as a function of t(θis measured from the positivedirection). What are (a) e, and (b) f, including units?
See all solutions

Recommended explanations on Physics Textbooks

Further Mechanics and Thermal Physics

Read Explanation

Famous Physicists

Read Explanation

Atoms and Radioactivity

Read Explanation

Thermodynamics

Read Explanation

Translational Dynamics

Read Explanation

Waves Physics

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free