Please help me find the answers!
Answers
Answer:
1. T₁ is approximately 100.33 N
T₂ is approximately -51.674 N
2. 230°F is 383.15 K
3. Part A
The total torque on the bolt is -4.2 N·m
Part B
Negative anticlockwise
Explanation:
1. The given horizontal force = 86 N
The direction of the given 86 N force = To the left (negative) and along the x-axis
(The magnitude and direction of the 86 N force = -86·i)
The state of the system of forces = In equilibrium
The angle of elevation of the direction of the force T₁ = 31° above the x-axis
The direction of the force T₂ = Downwards, along the y-axis (Perpendicular to the x-axis)
Given that the system is in equilibrium, we have;
At equilibrium, the sum of the horizontal forces = 0
Therefore;
T₁ × cos(31°) - 86 = 0
T₁ = 86/(cos(31°)) ≈ 100.33
T₁ ≈ 100.33 N
Similarly, at equilibrium, the sum of the vertical forces = 0
∴ T₁×sin(31°) + T₂ = 0
Which gives;
100.33 × sin(31°) + T₂ = 0
T₂ = -100.33 × sin(31°) ≈ -51.674
T₂ ≈-51.674 N
2. 230° F to Kelvin
To convert degrees Fahrenheit (°F) to K, we use;
Pluggining in the given temperature value gives;
230°F = 383.15 K
3. Part A
Torque = Force × perpendicular distance from the line of action of the force
Therefore, the clockwise torque = 9 N × 0.4 m = 3.6 N·m (clocwise)
The anticlockeisre torque = 13 N × 0.6 m = 7.8 N·m (anticlockwise)
The total torque o the bolt = 3.6 N·m - 7.8 N·m = -4.2 N·m (clockwise) = 4.2 N·m anticlockwise
Part B
The torque is negative anticlockwise.
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Steve and Carl are driving from Scranton to Bridgeport, a distance of 180 miles. If their speed averages60 miles an hour, how long will it take them to get there?A. 3.5 hoursB. 3 hoursC. 2.5 hoursD. 4 hours
B. 19.6 m/s
C. 4.9 m/s
D. 9.8 m/s
Answers
Here, t = 2 s [ Given ]
a = 9.8 m/s² [constant value for earth system ]
Substitute their values into the expression:
9.8 = v/2
v = 9.8 × 2
v = 19.6 m/s
In short, Your Answer would be Option B
Hope this helps!
i just did the quiz and so the only 2 options that made logical sense would be B (19.6 m/s) or D (9.8 m/s) the reason someone could get confused between these two is because 19.6 divided by 2 is 9.8 m/s so for each second it will go down 9.8 m/s but since it wants to know the velocity it would be 19.6 m/s
hope this helps
Answers
Potential energy =
(mass) x (gravity) x (height above the reference level) .
Relative to the bottom of the cliff, the potential energy
at the top of the cliff is
(25kg) x (9.8 m/s²) x (30 meters)
= (25 x 9.8 x 30) kg-m²/s²
= 7,350 joules .
Kinetic energy = (1/2) x (mass) x (speed²)
The rock's kinetic energy at the bottom is
the same as its potential energy at the top.
7,350 joules = (1/2) x (25 kg) x (speed²)
Divide each side
by 12.5kg : 7,350 joules/12.5 kg = speed²
7,350 kg-m²/s² / 12.5kg = speed²
(7,350 / 12.5) m²/s² = speed²
588 m²/s² = speed²
Take the square root
of each side:
Speed = √(588 m²/s²)
= 24.248... m/s (rounded)
We have our formula for potential energy, which we are trying to solve for,
PE = mgh or potential energy = mass * gravity * height
So we know that PE all depends on these.
Height : 30 meters
Mass : 25 kg
Gravity (which is always constant) : 9.8 m/s/s
Now add into formula.
PE = 25*30*9.8
PE = 7350 Joules
Answer: PE = 7350 Joules
Answers
Answer:
the answer is true
I am in Health
long and how
often have to do with exposure to chemicals?
Answers
Well how much, how long, and how often
For example how much is like how much a object is left in a small room with chemicals
How long is the time
how often is how much the same cycle is done repeatedly
Answers
Answer:
17.23L
Explanation:
The table lists pressure and volume values for a particular gas. Which is the best estimate for the value of V at P = 7.0 × 103 pascals?
P (pascals) V (liters) 1/v
1. 5.0 × 10^3 6.0 0.16
2. 1.5 × 10^4 3.0 0.33
3. 2.0 × 10^4 2.0 0.5
4. 2.5 × 10^4 1.5 0.66
if we are to plot the above data in a linear graph, the equation of a line graph below can be used
y-y1=m(x-x1)
y-y1=(x-x1)..............1
from the ideal gas law
pressure is inversely proportional to volume as nRT is the constant of proportionality
PV=nRT
P=nRT/V
from equation 1
let y1= 1.5 × 10^4
y2= 2.0 × 10^4
x1=0.33
x2= 0.5
y-1.5x10^4=2.0 × 10^4-1.5 × 10^4 /(0.5-.33)(x-0.33)
y-1.5x10^4=29411(x-0.33)
y=15000-9705.88+29411x
y=5294+29411x
at 7*10^3
7*10^3=5294+29411x
x=0.058
recall that x=1/V
inverse of both sides gives volume to be
V=17.23L
I think the question need to use extrapolation. FInd the linear function of the first and second data. And then, the anwser is 5.4 liters.
Answers
Answer:
Mass
Explanation: