describe what is inside a spring balance and explain how it works.
Answer:
The spring balance (also known as spring scale) is simply a spring fixed at one end with a hook to attach an object at the other. It works by Hooke's Law, which states that the force needed to extend a spring is proportional to the distance that spring is extended from its rest position.
HOW IT WORKS:
It consists of a spring fixed at one end with a hook to attach an object at the other. It works by Hooke's Law, which states that the force needed to extend a spring is proportional to the distance that spring is extended from its rest position. Therefore, the scale markings on the spring balance are equally spaced.
A steam engine generating 5 hp is raising a load weighing 2000 lb.How high will thebload be raised in 10 s.
Answer:
Explanation:
bi
The height raised by the load is 4.18 m.
Given data:
The power rating of steam Engine is, P = 5 hp = 5 × 745.7 = 3728.5 W.
The weight of load is, W' = 2000 lb = 2000 × 4.45 = 8900 N.
The time interval is, t = 10 s.
We know that the rate of doing any work is known as Power. So here the power will be equal to the work done to raise the load for 10 s of time. Then the expression is,
[tex]P = \dfrac{W}{t}\\\\P = \dfrac{W' \times h}{t}[/tex]
Here, h is the height raised by load.
Solving as,
[tex]3728.5 = \dfrac{8900 \times h}{10}\\\\h = 4.18 \;\rm m[/tex]
Thus, we can conclude that the height raised by the load is 4.18 m.
Learn more about the mechanical power here:
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Chapter 1 - Total Health Quiz Which of the following is not an aspect of physical health?
a. Eating well
b. Making friends
c. Being active
d. Getting enough sleep
Answer:
the answer seems to be B
SECTION 5 - FORCES
1. In the formula F=ma; state what each of the letters represents and the unit of measurement.
F = _______(_)
m =_______(_)
a = _______(_)
Answer:
F= force(newton or kg*m/s^2)
m=mass(kg)
a=acceleration(m/s^2)
F=ma
kg*m/s^2=kg x m/s^2
kg*m/s^2=kg*m/s^2
Hope this helps ;) ❤❤❤
Answer:
F - Newton
M - Mass
A - Acceleration
Explanation:
yes
1. Plot the following graphs:
(a) distance –time graph for an object with uniform speed
(b) distance –time graph for an object with non- uniform speed
(c) velocity –time graph for uniform motion of a car
(d) Velocity –time graph for a car moving with uniform accelerations.
(e) Velocity –time graph for a car moving with non- uniform accelerations.
(f) A body at rest
Answer:
(a) The distance-time graph for an object with uniform speed is giving by a straight line sloped graph with a constant positive or negative gradient as shown in the attached diagram
(b) The distance-time graph for an object with non-uniform speed is giving by a curved line sloped graph with varying gradient as shown in the attached diagram
(c) The velocity-time graph for a car with uniform motion is giving by a horizontal line graph at the speed of constant motion with a zero gradient as shown in the attached diagram
(d) The velocity-time graph for a car moving with uniform acceleration is giving by a straight line sloped graph with a constant positive or negative gradient as shown in the attached diagram
(e) The velocity-time graph for a car moving with non-uniform acceleration is giving by a curved line sloped graph with varying gradient as shown in the attached diagram
(f) According to Newton's first law of motion, an object at rest will remain at rest with no motion unless acted by a force, an therefore, will have no motion with time
Explanation:
Question 1 of 11
Why is publishing results important in science?
O A. It adds bias to experimental data.
O B. It turns hypotheses into scientific laws.
O C. It lets scientists show off their imaginations.
O D. It allows others to evaluate the results.
Answer:
D. It allows others to evaluate the results.
Explanation:
All the scientists prefer publishing of their research so that scientific and medical community can evaluate the results.
The published research provides instructions or information that allows other researchers to repet the experiment and verify the results. All the scientific publications are based on research and observation which helps other reserachers to refer the published research to find something new.
Hence, the correct answer is "D".
Speeding truck slams on the brakes and accelerates at -7.40m/s^2 Before coming to a stop. It leaves skid marks on the pavement that are 43.1m long. How fast was the truck going before it slammed on the breaks?
Answer:
25.2563 m/s
Explanation
This is the equation needed
[tex]$v^2 = u^2 + 2ad$ where v is the final velocity, u is the initial velocity, a is the acceleration, and d the distance[/tex]
So Just plug in!
The scattering of dissolved particles evenly is called
Answer:
the process of that happening is called Dissolving
the substance that is dissolved is called
Solute
What is the density of the baseball?
g/cm3
Answer:
0.70 g/cm3
Explanation:
Step 1 : weight ball to get the mass,
step 2 : measure the ball to find the length,
step 3 : multiply the length three times to calculate the volume,
step 4 : divide the mass with the volume to get the density.
Answer: 0.73
Explanation:
If low CVP precipitates a suction alarm, rapid infusion of volume can remedy the situation after dropping the P-level.
True / False.
Answer:
d
Explanation:
Answer:true
Explanation:
A car drives at a constant speed of 40 m/s for 1000s how far does it go
Answer:
40,000 meters
Explanation:
We want to find how far the car travels, or the distance. Therefore, we can use the following formula:
[tex]d= s*t[/tex]
where [tex]s[/tex] is the speed and [tex]t[/tex] is the time
The speed of the car is 40 meters per second and the time is 1000 seconds. Therefore,
[tex]s= 40 m/s*\\t=1000s[/tex]
Substitute the values into the formula.
[tex]d= 40 m/s * 1000s[/tex]
Multiply. When you multiply, the 2 "s" variables will cancel out.
[tex]d= (40 m*1000)[/tex]
[tex]d= 40,000 m[/tex]
The distance traveled by the car is 40,000 meters.
Two particles with positive charges q1 and q2 are separated by a distance s. Along the line connecting the two charges, at what distance from the charge q1 is the total electric field from the two charges zero
Answer:
The distance is [tex]z = \frac{1 + \sqrt{ \frac{k * q_2 }{ k * q_1}}}{s}[/tex]
Explanation:
From the question we are told that
The positive charges is [tex]q_1 \ and \ q_2[/tex]
The distance of separation is [tex]s[/tex]
Generally at the point where the electric field is zero would be a point where
The electric field due to [tex]q_1[/tex] = The electric field due to [tex]q_2[/tex]
Generally the electric field due to [tex]q_1[/tex] is mathematically represented as
[tex]E_1 = \frac{k * q_1}{ z^2 }[/tex]
Since we are taking our reference from [tex]q_1[/tex] then the electric field due to [tex]q_2[/tex] is mathematically represented as
[tex]E_2 = \frac{k * q_2}{ (s- z)^2 }[/tex]
So
[tex]\frac{k * q_1}{ z^2 } = \frac{k * q_2}{ (s- z)^2 }[/tex]
[tex]k * q_1 * (s- z)^2= k * q_2 * z^2[/tex]
[tex][ \frac{s -z }{z} ]^2 = \frac{k * q_2 }{ k * q_1}[/tex]
[tex]\frac{s -z }{z} = \sqrt{ \frac{k * q_2 }{ k * q_1}}[/tex]
[tex]\frac{s}{z} - 1 = \sqrt{ \frac{k * q_2 }{ k * q_1}}[/tex]
[tex]z = \frac{1 + \sqrt{ \frac{k * q_2 }{ k * q_1}}}{s}[/tex]
Which of the following would cause a fan cart to accelerate the least?
- doubling the speed of the fan
- pointing the fan exhaust downward
- tripling the speed of the fan
- pointing the fan exhaust upward
Answer:
The correct option is;
-Pointing the fan exhaust upward
Explanation:
The fan cart transfers reaction force from the jet of air it blows through the exhaust into motion in the opposite direction of the jet. By pointing the fan exhaust upwards, the direction of motion of the cart is therefore, into the ground. Due to the solid nature of the ground the motion is resisted, and by Newton's first law of motion, a body will remain in motion unless resisted by a force. In the case of the question, the ground is resisting the motion of the cart and the cart will remain at rest and having zero acceleration.
When replacing an existing luminaire (fixture) with a ceiling-suspended paddle fan, make sure that the existing outlet box is listed and marked as ____________________.
Answer:
When replacing an existing luminaire (fixture) with a ceiling-suspended paddle fan, make sure that the existing outlet box is listed and marked as ________one that can support the fan__________
Explanation:
Because an outlet which is not listed an cannot support the fan will lead to its damage and short lifespan
The rotating drum in a clothes-dryer has a radius of 0.31 m. If the acceleration at the rim of the drum is 27 m/s2, what is the tangential speed of the rim?
Answer:
v = 2.89 m / s
Explanation:
This is a kinematics exercise, the centripetal acceleration is
a = v² / r
where a is the acceleration, v is the velocity and r the radius
let's clear
v = √a r
let's calculate
v = √ (27 0.31)
v = 2.89 m / s
this is the speed of the drum which is constant
The tangential speed of the rim will be "2.89 m/s".
Tangential speed:Tangential speed seems to be the rate beyond which the item moving throughout a circle travels.
A wider radius indicates that perhaps the thing goes a considerable distance.
According to the question,
Radius, r = 0.31 m
Acceleration, a = 27 m/s²
We know,
→ [tex]a = \frac{v^2}{r}[/tex]
or,
→ [tex]v= \sqrt{ar}[/tex]
By substituting the values,
[tex]= \sqrt{27\times 0.31}[/tex]
[tex]= 2.89 \ m/s[/tex]
Thus the answer above is right.
Find out more information about the tangential speed here:
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Hay Que!
Explain world’s most famous formula which describes the relationship between mass and energy. Also give 1 suitable application.
Answer:
E = mc² relation between mass and energy
it is only applicable in space. example One of the most extraordinary things about Einstein's energy-mass equivalence equation is its simplicity.A 100 watt light bulb uses 100 joules of energy every second, i.e. one watt is one joule per second.Explanation:
hope it will help you :)
The force of gravity pulls down on your school with a total force of 400,000 newtons. The force of gravity pulling down on your school would be exactly twice as much if your school:
Explanation:
It is given that, the force of gravity pulls down on your school with a total force of 400,000 N.
The force of gravity is given by the formula as follows :
F = mg
m is mass and g is the acceleration due to gravity
Mass of an object remains same always. But if the mass of your school becomes twice of the initial mass, the force of gravity pulling down on your school would be exactly twice.
WHAT WAS THE ACCELERATION OF THE CART WITH THE LOW FAN SPEED?
Answer:
18.0 cm/s2
Explanation:
It is easier to lift the load as the load is pushed towards the wheel in a wheelbarrow
The volume of gas in a flexible container at a depth of 10 m/33 ft will expand to ______ its original volume if taken to the surface.
Answer:
Twice its original volume.
Explanation:
For diving applications, 10 m/33 feet of sea water is taken to exerts a gauge pressure that is the same pressure as the atmosphere, or one ata/bar.
This means that we add one ata/bar pressure for every 10 m/33 feet you descend.
The effect of this is that, at 10 m/33 ft, you're under an absolute pressure of two ata/bar, one from air and one from water. Adding another 10 m/33 ft to this depth to make it 20 m/66 ft, puts you under under three ata/bar of pressure and so on.
Descending to a depth of 10 m/33 ft, with a flexible container means that you have double the ata/bar pressure acting on you. If you decide to resurface, the pressure on the flexible container will reduce by a factor of two.
Since volume is inversely proportional to the pressure, if the pressure reduces by a factor of 2, then the volume will increase by a factor of two, or we can say that the volume will double.
to t
Mass of propane = 4,300 g
Volume of propane = 10,000 mL
The density of liquid(. )
g/mL.
Answer:
Welcome ShalomMHNCB Phx
Explanation:
the answer is because I just had this question and I got it wrong so te answer is 0.43
Answer:
The density of liquid propane is 0.43 g/mL
Explanation:
On EDG
Ac=v^2/r solve for v, solve for r
Answer:
v = √ac×r
r = [tex]\frac{v^2}{ac}[/tex]
Answer:
Explanation:
Sorry cant help
Which fact was most likely discovered between the time of Mendeleev’s table and the time of Moseley’s table that helped Moseley develop his version?
Answer:
The number of protons in an atom is different than the atom's total mass.
Explanation:
Mendeleev had presented the first structured periodic table in 1869. But, in 1913, Henry Moseley developed the modern periodic table. The crucial difference between the two periodic tables is that Mendeleev's periodic table is generated on the basis of the atomic masses of chemical elements while the chemical element's atomic numbers were the main focus of Moseley's periodic table. There were just 56 chemical elements in Mendeleev's periodic table. On the other hand, 74 chemical elements are presented in Moseley's periodic table.
Answer:
it is
Explanation:
The correct option is THE NUMBER OF PROTONS IN AN ATOM IS DIFFERENT FROM THE ATOM'S TOTAL MASS.
During the time Mendeleev developed his periodic table, scientists believed that the number of protons in an atom determine the mass of that atom. But withing the forty years that separated Mendeleev periodic table from Moseley periodic table it was found out that this was not so, this fact helped Moseley in his own work.
Electrical equipment should always be properly connected to an electrically neutral source. What is this source called
Answer:
Earth or ground
Explanation:
Earth is the reference point in an electrical circuit from which voltages are measured, it connects the house's electrical system physically to the ground. It functions in a house to ensures that exposed electrical parts do not have a dangerous voltage relative to the Earth, which could cause an electric shock if a grounded person touched them, and also to make sure that the failures of internal insulation triggers protective mechanisms such as fuses or circuit breakers in the circuit to remove power from the device.
what happens when two forces act in opposite direction
Answer: When two forces act in the same direction, they add together.
Explanation:
Answer:
When forces act in opposite directions, they are combined by subtracting the smaller force from the larger force.
Hope this helps! （づ￣3￣）づ╭❤～
A car is traveling with a velocity of 40 m/s and has a mass of 1120 kg. The car has ___________energy. Calculate it.
Answer:
8.9*10^5
Explanation:
as we know that
K.E =1/2 mv²
where m is mass and v is velocity
given mass= 1120 kg
given velocity =40 m/s
so K.E=1/2 (1120)(40)²
K.E=1792000/2
K.E=896000
K.E=8.9*10^5
Answer:
8.9* 10^5
Explanation:
When the pressure on a gas increases,what does the volume do?
Answer:
As pressure goes up, volume goes down.
Explanation:
Pressure and volume of a gas are inversely proportional. This means that as pressure goes up, volume goes down. And as volume goes up, pressure goes down.
Cheers.
Answer:
It goes down.
Explanation:
When the pressure of the gas goes down the volume goes up
5g 508mg
Which one is greater
Answer:
5g
Explanation:
Answer: 5g is greater than 508mg
Explanation:
It's greater because of the units. Although 508 is a larger number, grams are greater that milligrams.
Fully describe or explain the solid state of matter. You should include at least 5 ways to characteristics or descriptors that prove a solid is a solid.
Answer:
Explanation:
The solid state is one of the 3 stages which matter undergoes in addition to the liquid and the gaseous state. Matter in it's solid state contains atoms which are closely packed, In this stage, matter exhibits the least amount of kinetic energy of all three stages hence hindering movement of its particles and exhibiting firmness and rigidity. Solids exhibits a regular arrangement of it's molecules which differs from the scattered nature of gaseous particles and slightly ordered nature of liquid molecules. Solids exhibits a defined volume , and shape with molecules held together by string attractive forces. Solids can change into liquid through melting or transform directly into gaseous state through sublimation.
3) Determine how many Altuves you could travel in a day if you were moving at 45.000 mph all day. 1 Altuve=1.65 m. 1 inch=2.54 cm. 1 mile=5280 ft
Answer:
Hey there!
Step one: Find how many miles you can travel per day.
45(24)=1008. You could travel 1008 miles a day.
Step two: Convert 1008 miles to meters.
1008 miles roughly equals 1622219 meters.
Step three: Convert meters to Altuves.
1622/1.65=983.03 Altuves.
Let me know if this helps :)