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loris [4]
4 years ago
8

Physics Homework

Physics
1 answer:
katrin2010 [14]4 years ago
4 0

Explanation:

a. Average speed = distance / time

= 100 m / 70 s

= 1.43 m/s

b. Average displacement = displacement / time

= 0 m / 70 s

= 0 m/s

Distance is the length of the path traveled.  Displacement is the difference between the final position and initial position.

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A motorcycle is following a car that is traveling at constant speed on a straight highway. Initially, the car and the motorcycle
n200080 [17]

Answer:

a) 4.9 s

b) 167.8 m

Explanation:

Hello!

To solve this question we need to make use of the equations of motion of both the motorcycle xm(t) and the car xc(t) at t=5

Let us consider the position of the motorcycle at t=5 as the origin, that is:

xm(t+5) = vt + (1/2)at^2

xc(t+5) = vt + 60 m

where v = 22.0m/s  and   a=5m/s^2

We are looking for the time t' when the position of the car and the motorcycle are the same:

xm(t'+5)=xc(t'+5)

vt' + (1/2)at'^2 = vt' +60m

t' = √(120 m /a) = 4.89898... s

Since we are considering the origin of the cooordinate system at the position when the motorcycle starts to accelerate, the distance travelled by the motorcycle until it catches the car is given by:

xm(t'+5)= vt' + (1/2)at'^2

xm(9.89898s) = (22 * 9.89898 + 2.5 * 9.89898^2)m

xm(9.89898s)= 167.777... m

3 0
3 years ago
When a pitcher throws a baseball, it reaches a top speed of 39 m/s. if the
Aliun [14]

From the calculation, the acceleration of the body is 26m/s^2.

<h3>What is motion under gravity?</h3>

When an object is thrown up or down, the motion of the body is influenced by the gravitational pull on the body.

Now;

Given that;

v = 39 m/s

t = 1.5 s

u = 0 m/s

a = ?

v = u + at

v = at

a = v/t

a = 39 m/s/1.5 s

a = 26m/s^2

Learn more about acceleration:brainly.com/question/12550364

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4 0
2 years ago
the density of atmosphere (measured in kilograms/meter3) on a certain planet is found to decrease as altitude increases (as meas
statuscvo [17]
The type of relationship between atmospheric density and altitude is therefore inverse relationship. This means an increase in either will decrease the other factor. Density is mass per unit volume, it is difficult to calculate with only altitude 1,291 kilometers given. Else, we could also use temperature and pressure to solve density but they are not provided.
5 0
3 years ago
Read 2 more answers
How is the electroscope an example of a conductor?
velikii [3]

Answer: Its in explanation.

Explanation:

Because the electroscope is made from conducting material, some of its electrons move up to the top of the electroscope to be near the charged rod when the rod is held close.

4 0
3 years ago
Read 2 more answers
Examine the total number of orbitals in the n = 1 through 4 shells. what is the relationship between the n value and the total n
Veseljchak [2.6K]

The total number of orbitals in the n = 1 through 4 shells is only 1.

The relationship between the n value and the total number of orbitals is given as

Total number of orbitals = n²

Because there is only one way a sphere can be orientated in space, there is only one(1)  orbital in the n = 1 shell.

An orbital has n² total orbitals for a given value of n.

Each atom's electron is given one of four quantum numbers, the primary quantum number (symbolized n), to describe the state of that electron. It is a discrete variable since the values are all natural numbers starting at 1.

The orbital's size is defined by the primary quantum number (n). For example, orbitals with n = 2 are larger than those with n = 1.

Electrons are drawn to the atom's nucleus because their electrical charges are in opposition to one another.

In order to excite an electron from an orbital where it is close to the nucleus (n = 1) to an orbital where it is distant from the nucleus (n = 2), energy must be absorbed.

Thus, the energy of an orbital is indirectly described by the primary quantum number.

Learn more about Quantum numbers here brainly.com/question/5927165

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4 0
2 years ago
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