Explanation:
The options are; Ice Steam and Water.
The state of matter associated with the options are;
Ice - Solid
Steam - Gas
Water- Liquid
The particles are arranged in a regular pattern in ____________________
Among all the state of matter, the particles are closely packed and in an ordered manner is observed in the solid state - Ice
The particles are close together but not in a pattern in ____________________
In the liquid state of matter, the particles are not as tightly bounded as that of the solid. Hence they are able to still move around a bit. - Water
The particles move quickly in all directions in ____________________
The particles of the gaseous state move in all directions colliding with each other and the walls of the container. - Steam
Complete Question
A skier leaves a ski jump with a horizontal velocity of 29.4 m/s. The instant before she lands three seconds later, the magnitudes of the horizontal and vertical components of her velocity are: Group of answer choices
A 29.4 m/s; 29.4 m/s.
B 41.6 m/s; 41.6 m/s.
C 29.4 m/s; 41.6 m/s.
D 0; 29.4 m/s.
E 29.4 m/s; 0.
Answer:
Correct option is A
Explanation:
From the question we are told that
The horizontal velocity is
The time taken for the jump is
The velocity along the vertical axis is
substituting values
During the jump the horizontal velocity remains the same as there was a direction change
So the correct option is A
Answer:
A.The vertical velocity is constantly increasing as the ball falls.
B.The horizontal velocity does not noticeably change as the ball falls.
G.The horizontal velocity does not affect how long it will take the ball to fall to the floor.
H.The velocity vector of the ball changes as it travels through the air.
Explanation:
As the ball is projected horizontally so here the vertical component of the velocity is zero
So the time to reach the ground is given as
so we will have
so this is the same time as the ball is dropped from H height
Since there is no force in horizontal direction so its horizontal velocity will always remain constant while vertical velocity will change at constant rate which is equal to acceleration due to gravity.
So overall the velocity vector will change due to net acceleration g
Answer:
C. It can be magnetized
Explanation:
As we know that Ferromagnetic materials are made up of small domains which can be treated as small magnets.
These small magnets are aligned in random directions so that the net magnetic field due to all small domains will cancel out and it gives no magnetic field by their own.
Now when these type of ferromagnetic substances are placed in external magnetic field then due to the external field these all domains are aligned in the direction of external magnetic field.
Due to this alignment of domains ferromagnetic substance produce their own field and this phenomenon is known as magnetization
So here correct answer will be
C. It can be magnetized
Answer:
a)v = 476.28 m / s
, b) T = 6.69 10⁵ N
, c) λ = 0.486 m
, d) λ = 0.35 m
Explanation:
a) The speed of a wave on a string is
v = √T /μ
also all the waves fulfill the relationship
v = λ f
they indicate that the fundamental frequency is f = 980 Hz.
The wavelength that is fixed at its ends and has a maximum in the center
L = λ / 2
λ = 2L
we substitute
v = 2 L f
let's calculate
v = 2 0.243 980
v = 476.28 m / s
b) The tension of the rope
T = v² μ
the density of the string is
μ = m / L
T = v² m / L
T = 476.28² 0.717 / 0.243
T = 6.69 10⁵ N
c) λ = 2L
λ = 2 0.243
λ = 0.486 m
d) The violin has a resonance process with the air therefore the frequency of the wave in the air is the same as the wave in the string. Let's find the wavelength in the air
v = λ f
λ= v / f
λ = 343/980
λ = 0.35 m