An object's potential energy is set it cannot change is this true

Why would north america will not be able to view the eclipse

Flauer [41]

The North America will not be able to view the eclipse because of its location on the earth caused by the tilting of the earth.

<h3>Effect of tilting of the Earth</h3>

The tilt of the Earth is what causes seasons to occur. These are the seasons in relation to the Northern Hemisphere.

The tilting of the Earth causes the difference in the amount of sun reaching each region of the earth like in the North America continent.

Thus, the North America will not be able to view the eclipse because of its location on the earth caused by the tilting of the earth.

Learn more about eclipse here: brainly.com/question/8643

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4 0

2 years ago

A stationary siren on a firehouse is blaring at 81Hz. Assume the speed of sound to be 343m/s. What is the frequency perceived by

inn [45]

For a stationary siren on a firehouse is blaring at 81Hz. Assume the speed of sound to be 343m/s, the frequency perceived is mathematically given as'

F=81.721Hz

<h3>What is the frequency perceived by a firefighter racing toward the station at 11km/h?</h3>

Generally, the equation for the doppler effect is mathematically given as

$F'=\frac{vs+v}{vs}*f$

Therefore

F=81(343+3.05556)/343

F=81.721Hz

In conclusion, the frequency is

F=81.721Hz

Read more about frequency

brainly.com/question/24623209

4 0

2 years ago

A satellite is launched to orbit the Earth at an altitude of 3.25 107 m for use in the Global Positioning System (GPS). Take the

Korolek [52]

Answer:Orbital period =21.22hrs

Explanation:

given that

mass of earth M = 5.97 x 10^24 kg

radius of a satellite's orbit, R= earth's radius + height of the satellite

6.38X 10^6 + 3.25 X10^7 m =3.89 X 10^7m

Speed of satellite, v= $\sqrt GM/R$

where G = 6.673 x 10-11 N m2/kg2

V= \sqrt (6.673x10^-11 x 5.97x10^ 24)/(3.89 X 10^ 7m)

V =10,241082.2

v= 3,200.2m/s

a) Orbital period

$\sqrt GM/R$ = $\frac{2\pi r}{T}$

V= $\frac{2\pi r}{T}$

T= 2 $\pi$ r/ V

= 2 X 3.142 X 3.89 X 10^7m/ 3,200.2m/s

=76,385.1 s

60 sec= 1min

60mins = 1hr

76,385.1s =hr

76,385.1/3600=21.22hrs

3 0

3 years ago

What is the speed of a car that<br> accelerates at a rate of 10 m/s2 for a<br> total of 25 seconds?

jeyben [28]

Answer:

Explanation:

The speed of the car can be found by using the formula

where

a is the acceleration

v is the speed

t is the time

From the question we have

v = 10 × 25

We have the final answer as

Hope this helps you

5 0

3 years ago

Natasha weighs 530N. what is her kinetic energy as she swimsat

WITCHER [35]

<u>Answer:</u> The kinetic energy of Natasha as she swim is 38.88 J

<u>Explanation:</u>

Force is defined as the mass multiplied by the acceleration of the object.

Mathematically,

$F=m\times a$

where,

F = weight of Natasha = 530 N

m = mass of Natasha = ?

a = acceleration due to gravity = $9.8m/s^2$

Putting values in above equation, we get:

$530kg.m/s^2=m\times 9.8m/s^2\\\\m=\frac{530}{9.8}=54kg$

Speed is defined as the rate at which an object moves with respect to time. To calculate the speed, we use the equation:

$s=\frac{d}{t}$

where,

d = distance traveled = 72 m

t = time taken by Natasha = 1.0 min = 60 sec (Conversion factor: 1 min = 60 s)

Putting values in above equation, we get:

$s=\frac{72}{60}=1.2m/s$

Kinetic energy is defined as the energy which is possessed due to its motion. It is also defined as the half of the product of mass of the object and square of the velocity of the object.

Mathematically,

$E_K=\frac{1}{2}mv^2$

where,

$E_K$ = kinetic energy of Natasha

m = mass of the Natasha = 54 kg

v = velocity of Natasha = 1.2 m/s

Putting values in above equation, we get:

$E_K=\frac{1}{2}\times 54\times (1.2)^2\\\\E_K=38.88J$

Hence, the kinetic energy of Natasha as she swim is 38.88 J

3 0

3 years ago