Answer:
(a) 80.36 m/s^2
(b) 0.0933 second
Explanation:
initial velocity, u = 7.5 m/s
final velocity, v = 0 m/s
distance moved, s = 0.350 m
(a) Let a be the deceleration.
Use third equation of motion
a = 80.36 m/s^2
Thus, the deceleration is 80.36 m/s^2.
(b) Let the time taken is t
Use first equation of motion
v = u + a t
0 = 7.5 + 80.36 x t
t = 0.0933 second
When water changes into vapor, it is called evaporation. BONUS: This is formed by the boiling point of water, which is 230°F (Fahrenheit) or 110°C (Celsius).
Answer:
The correct answer is
a) 1, 2, 3
Explanation:
In rolling down an inclined plane, the potential energy is Transferred to both linear and rotational kinetic energy thus
PE = KE or mgh = 1/2×m×v² + 1/2×I×ω²
The transformation equation fom potential to kinetic energy is =
m×g×h = 
= 
= 
=
Therefore the order is with increasing rotational kinetic energy hence
the first is the sphere 1 followed by the disc 2 then the hoop 3
the correct order is a, 1, 2, 3
The best way to look at it is the other way around.
Electromagnetic waves exist over a huge range of frequencies, from less
than 1 per second up to more than 3 billion billion billion per second.
If electromagnetic waves with frequencies between maybe about
4 million billion per second up to about 7.5 million billion per second
go into your eye, you SEE them.
Outside of that range, your eye doesn't know that there's anything there. But
IN that range, your eye has incredible nerve ends in the back that can tell the
difference between different frequencies. The highest frequencies in that range
produce the feeling of blue in your brain. The next highest ones make a feeling
of green. The next highest ones make the impression of yellow, and so on and
so on, down to the lowest frequencies that your eye can detect, and those look
red. If the frequency is any lower than red, you don't see it even when it pours
into your eyes.
