Answer:
Breaths per minute is a frequency. The period is its reciprocal.
Explanation:
In simple harmonic motion, a period (T) is the time taken for one point to start in a position and reach that position again, in other words to complete a cycle or lapse. In this case, a period is the time one takes from starting to inspire the air to releasing all of it from the lungs.
In simple harmonic motion, the frequency (f) is how many times a point completes a cycle or lapse in one unity of time (could be one second, one minute, one hour, etc). In this case, the frequency is how many times one breathes in one minute. This is the breathing rate, since it is breathings per minute. Breaths per minute is a frequency.
Period (T) and frequency (f) relate to each other in the following formulae: or .
Therefore, breaths per minute is a frequency, and since it is related to the period, we say the period is reciprocal to it.
(b) 1.5 cm,
(c) 2.5 cm,
(d) 3.5 cm,
(e) 7 cm.
Answer:
a. 0
b. 8.4N/C
c. 5.04N/C
d. 3.6 N/C
e. 1.8N/C
Explanation:
The following data are given
inner cylindrical radius,r=5cm
outer cylindrical radius R=8cm
Charge density,p=7pc/m
radius of rod= 1cm
a. at distance 0.5cm from the center of the rod, this point falls on the rod itself and since the charge spread out on the surface of the rod, there wont be any electric field inside the rod itself
Hence E=0 at 0.5cm
b. at 1.5cm i.e 0.015m
the electric field is expressed as
The direction of the field depends on the charge on the rod
c. at 2.5cm i.e 0.025m
the electric field is expressed as
The direction of the field depends on the charge on the rod
d. at 3.5cm i.e 0.035m this point is still within the rod and the inner cylinder
the electric field is expressed as
The direction of the field depends on the charge on the rod
e. at 7cm which is a point outside the rod and the cylinder, the electric field is
The direction of the field depends on the charge on the rod
Answer:
As the mass is not written well, i will use the equation in terms of the gravitational acceleration:
The equation for the period of a satellite is:
We want to find r, so isolating r we get:
Where:
T = period.
r = radius of the satellite.
R = radius of the planet.
g = gravitational acceleration of the planet.
pi = 3.14159...
g = 78999.64 mi/h^2 (value of a table)
T = 42.391 h.
R = 3958.8 miles
We can replace those values in the equation and get:
Now this value is measured from the center of the Earth, then the altitude of the satellite measured from the surface of the Earth will be:
H = r - R = 38,339.1mi - 3958.8mi = 34,380.3 mi
At constant speed and varying position of the hockey puck, implies a change in the velocity of the hockey puck and net force is acting on it to keep it in motion.
According to Newton's second law of motion, the force applied to a an object is directly proportional to the product of mass and acceleration of the object.
F = ma
Acceleration is the change in the velocity of an object per change in time of motion.
Thus, we can conclude that at constant speed and varying position of the hockey puck, implies a change in the velocity of the hockey puck and net force is acting on it to keep it in motion.
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Answer:
Explanation:
When the puck is sliding on the ice, there is no force being exerted on the puck to keep it moving forward. Instead, inertia keeps the puck moving forward. Friction between the puck and the ice gradually slows the puck down. You hit a hockey puck and it slides across the ice at nearly a constant speed
b) 1/r^2
c) 1/r
d) None of above
When an underwater sound source emits waves of frequency 30 kHz in all directions, the intensity of the waves (in Watts/m2) vary with distance r from the source by the relation 1/r²
As the intensity mechanical sound wave is inversely proportional to the square of the distance from the source, therefore the correct option is B.
Wavelength can be understood in terms of the distance between any two similar successive points across any wave for example wavelength can be calculated by measuring the distance between any two successive crests.
It is the total length of the wave for which it completes one cycle.
The intensity of a mechanical wave is inversely proportional to the square of the distance from the source.
An underwater sound source emits waves of frequency of 30 kHz in all directions, the intensity of the waves (in Watts/m2) varies with distance r from the source by the relation 1/r², therefore the correct option is B.
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Answer:
Explanation:
given,
mass of the both ball = 5 Kg
length of rod = 2 L
where L = 0.55 m
angular speed = 45.6 rev/s
ω = 45.6 x 2 π
ω = 286.51 rad/s
v₁ = r₁ ω₁
v₁ =0.55 x 286.51 = 157.58 m/s
v₂ = r₂ ω₂
v₂ = 1.10 x 286.51 = 315.161 m/s
finding tension on the first half of the rod
r₁ = 0.55 r₂ = 2 x r₁ = 1.10
infrared radiant energy is sensed by human skin as warmth. Hence option C is correct.
Radiation in physics is the emission or transmission of energy as waves, particles, or both, via space or a material medium.[1][2] This comprises:
electromagnetic radiation, which includes gamma radiation, x-rays, microwaves, infrared, visible light, and ultraviolet radiation
Particle radiation includes beta radiation, proton radiation, neutron radiation, and other particles with non-zero rest energies.
ultrasonography, sound, and seismic waves (reliant on a physical transmission medium) are examples of acoustic radiation.
gravity radiation, which manifests as gravitational waves or ripples in spacetime's curvature
Depending on the energy of the emitted particles, radiation is frequently divided into ionising and non-ionizing categories. More than 10 eV is carried by ionising radiation, which is sufficient to ionise atoms, molecules.
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i think it is infared