Answer:
35 N
Explanation:
We are using Newton's law of motion.
Here is what we know:
(T-w)= ma
w = 3 kg (we will change to Newtons in a second)
a = 2m/s^2
rearrange equation to solve for T (tension)
T = ma+w
all we need is mass
Now to get the correct mass we need to divide its weight by the gravitational field strength(in our case it is just gravity) but first we want our weight of 3kg to be in Newtons.
1 kg = 9.81 N
w = (3)(9.81) = 29.4N
Now that our weight is 29.4N we need to divide that by gravity.
m =
Now that we have mass we can plug in our numbers
Plugging that into our calculator gives us the answer 35.4 or 35 N
(feel free to correct me if my reasonings for any of this stuff is incorrect)
Answer:
α = 2,857 10⁻⁵ ºC⁻¹
Explanation:
The thermal expansion of materials is described by the expression
ΔL = α Lo ΔT
α =
in the case of the bar the expansion is
ΔL = L_f - L₀
ΔL= 1.002 -1
ΔL = 0.002 m
the temperature variation is
ΔT = 100 - 30
ΔT = 70º C
we calculate
α = 0.002 / 1 70
α = 2,857 10⁻⁵ ºC⁻¹
Answer is given below
Explanation:
given data
pressure = double
volume = constant
solution
As we know that an Average velocity and rms velocity is directly proportional to square root of PV ..................1
so if we take P is doubled while keeping V constant
than Velocity increases by a factor
so that Factor = 1.414 for both the cases
Answer: 14 m/s
Explanation:
The speed of a sound wave is given by the following equation:
Where:
is the wavelength of the sound wave
Hence:
Answer:
Distance = 30m
Displacement = 6m W
Explanation:
Given the following:
Movement 1 = 18m W
Movement 2 = 12m E
Diatance is a scalar quantity with only magnitude and no direction. That is, in Calculating the distance moved by the locomotive, the direction of travel or movement of the object is not considered. It only measures the total amount of movement made during the Time of motion.
Therefore, total distance traveled equals :
Movement 1 + movement 2
18m + 12m = 30m
B) Displacement also measures the movement made by an object. However, Displacement is a vector quantity and therefore, considers both magnitude and direction of travel of the object. Therefore, it measures the overall change in position of the object from its starting position.
Therefore, Displacement of the locomotive equals:
18m W - 12m E = 6m E
