Ideas to improve hearing aids in medical sector to help deaf people.

Water can exist in three states: solid (ice), liquid and gas (steam).In which state, or states, is the motion of the molecules o

bazaltina [42]

Answer:

solid

Explanation:

8 0

3 years ago

Read 2 more answers

What travels in a wave from one location to another is _________.

Alina [70]

Answer:

Energy

Explanation:

A wave is a kind of disturbance which passes through a medium and during this process, energy is transferred from one point to another without causing any permanent displacement to the medium itself.

for example if a stone is dropped inside water, circular ripples are observed and energy moves from one point to another .

5 0

3 years ago

3.A golf ball is hit of it’s tee, 200m down the fairway.

Alinara [238K]

<u>Answers:</u>

3. The diagrams showing the forces acting on the golf ball are in the figure attached. Let’s have a detailed look:

a) Here the ball is under 2 forces:

F1 which is called The Normal force and is perpendicular to the surface of the tee where the ball rests

-F1, related to the gravity force, to the weight of the ball, and has the same magnitude, but the opposite direction (That’s why it has a negative sign).

In this case the sum of the forces is 0

b) Here we have again forces F1 and –F1, but in this very moment the club strikes the ball and we have:

F2, the force of the strike

c) While the ball is in its flight, it is under the following forces:

F1, the force of the lift through the air

-F2, the gravity force

-F3, the force of air resistance, also called drag

F4, the tangencial force of the ball flight

4. Here are the sizes and directions of the resultant forces:

i)Two forces of the same magnitude or size are applied to this block, but in opposite directions (in the x-axis). This is expressed as:

F=-10N+10N=0 The resulting force is zero

ii) Two forces of different size and opposite directions in the y-axis are applied to this block. The sum of the forces is:

F=30N-40N=-10N This means the resulting force is 10N applied downwards

iii) In this case the only force applied to the block is -5N applied downwards

iv) Here there are four forces applied to the block.

In the y-axis we have to forces of the same size but opposite directions:

F1=10N-10N=0 This means the applied force in the y-axis is zero

In the x-axis we have two forces of different size and opposite directions:

F2=-15N+10N=-5N This means the resulting force is applied to the –x-side

4 0

3 years ago

A football is kicked into the air with a velocity of 32m/s at an angle of 25º. At the very top of the ball’s path, its vertical

Travka [436]

At the "very top" of the ball's path, there's a tiny instant when the ball
is changing from "going up" to "going down". At that exact tiny instant,
its vertical speed is zero.

You can't go from "rising" to "falling" without passing through "zero vertical
speed", at least for an instant. It makes sense, and it feels right, but that's
not good enough in real Math. There's a big, serious, important formal law
in Calculus that says it. I think Newton may have been the one to prove it,
and it's named for him.

By the way ... it doesn't matter what the football's launch angle was,
or how hard it was kicked, or what its speed was off the punter's toe,
or how high it went, or what color it is, or who it belongs to, or even
whether it's full to the correct regulation air pressure. Its vertical speed
is still zero at the very top of its path, as it's turning around and starting
to fall.

7 0

3 years ago

After a check up, a person now has a far point of 100 cm, but with good near point vision. He needs to wear a new pair of correc

lakkis [162]

Answer:

so his far point according to this pair of glass is 200 cm

Explanation:

power of old pair of corrective glasses is given as

$P = -0.5 dioptre$