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Arisa [49]
4 years ago
10

A "shooting star" is usually a grain of sand from outer space that burns up and gives off light as it enters the atmosphere. wha

t exactly causes this burning?
Physics
1 answer:
Svetlanka [38]4 years ago
5 0
It is the friction or drag force on the solid. the object goes so fast that the friction is producing alot of heat. this heat causes it ignite (anything can be burnt if it is heated to high enough tempurature)


friction and drag force causes this burning
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The earth rotates about its pole once every 24 hrs. The distance from the pole to a location on the Earth is 35* north latitude
Oksana_A [137]
The angular velocity, ω= 
2π/t; t = 24 hrs = 24 x 3600 seconds = 86400 s
ω = 7.27 x 10⁻⁵
v = ωr
= 7.27 x 10⁻⁵ x 3242.8 x 1.6 x 1000 (converting miles to meters)
= 377.2 m/s
4 0
3 years ago
The amplitude of an electric field is 0.4 v/m 23 km from a radio transmitter. What is the total power emitted by the transmitter
ycow [4]

To solve this problem we will apply the concepts related to the relationship between the voltage, the electric field and the distance, once the voltage is found we will use the definition of power, which is defined as the square of the voltage over the resistance. This is,

V=Ed

E = Electric field

d= Distance between the points

Replacing,

V=0.4*23000

V=9200 V

Now applying the relation for power we have,

P=\frac{V^2}{R}

Here

V = Voltage

R = Resistance

Replacing,

P= \frac{9200^2}{377}

P=224509.3 W

Therefore the total power emmited by the transmitter is 224509.3 W

4 0
3 years ago
An object 4cm high is placed 15 cm from a convex lens of focal length 18cm. Draw a ray diagram and find the position, size, and
Nataly [62]

Answer:

what I don't no really????

3 0
3 years ago
The take-up reel of a cassette tape has a radius of 2.5 cm. Find the length of the tape that passes around the reel in 7.1 s whe
Jet001 [13]

Answer:

s = 0.337 m

Explanation:

First, we will find the angular displacement of the reel:

\theta = \omega t

where,

θ = angular displacement = ?

ω = angular speed = 1.9 rad/s

t = time taken = 7.1 s

Therefore,

θ = (1.9\ rad/s)(7.1 s)

θ = 13.5 rad

Now, we will find out the length of tape:

s = rθ

where,

s = length of tape = ?

r = radius of reel = 2.5 cm = 0.025 m

Therefore,

s = (0.025 m)(13.5 rad)

<u>s = 0.337 m</u>

6 0
3 years ago
a ball is thrown straight up it passes a 2.00 m high window 7.5 meters off the ground on its path up it takes 1.3 s to go past t
Svet_ta [14]
Let's say the velocity at the bottom of the window was "v."
s = v*t + ½at²
2 m = v * 1.3s - 4.9m/s² * (1.3s)² = v * 1.3s - 8.3 m
v = 10.3m / 1.3s = 7.9 m/s

Then the initial speed was
V = √(v² + 2as) = √(7.9m/s² + 2 * 9.8m/s² * 7.5m) = 14 m/s ◄ initial velocity
(after rounding to 2 digits from 14.5 m/s).
8 0
3 years ago
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