Answer:
Molecules
Explanation:
:)
Regulation size of a Tennis racket cannot have a hitting surface larger then.
a.12.5 inches in width
b.11 inches in width
c. 11.5 Inches in width
d.12 inches in width
Answer:
C.
Explanation:
"A racquet can be a maximum of 29 inches long while the hitting surface (the head) cannot be more than 15.5 inches in length and 11.5 inches wide."
thank you in advance
[tex]m1 = \frac{- v2m2 - m2v1}{v2 - v1} [/tex]
A bowling lane is 18 meters long. How long would it take a 1.5 m/s bowling ball to
roll down that lane?
16.5 seconds
16.5 meters
12 seconds
27 seconds
27 meters
12 meters
Divide distance by speed:
18 meters / 1.5 meters/ second = 12 seconds
Answer: 12 seconds
A bowling lane is 18 meters long. it would take 12 seconds for a 1.5 m/s bowling ball to roll down that lane, therefore the correct answer is the third option
What is Velocity?The total displacement covered by any object per unit of time is known as velocity. It depends on the magnitude as well as the direction of the moving object.
The mathematical expression for velocity is given by
velocity= total displacement/Total time
As given in the problem a bowling lane is 18 meters long and the ball is moving with a velocity of 1.5 m/s in the roll-down lane we have to find the time period for the bowling ball to roll down that lane
Total displacement = 18 meters
the velocity of the ball = 1.5 m/s
time =?
By substituting the values in the formula of the velocity
1.5 = 18/t
t= 12 seconds
Thus , it would take 12 seconds for a 1.5 m/s bowling ball to roll down that lane
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A plastic tube allows a flow of 12.9 cm°/s of
water through it.
How long will it take to fill a 227 cm bottle
with water?
Answer in units of s.
Answer:
It will take [tex]17.5968 s[/tex] to fill a bottle with water.
Explanation:
Total capacity of tube [tex]=227[/tex] cm.
Rate of full up the water in the tube [tex]=12.9 $\mathrm{cm}^{\circ} / \mathrm{s}$[/tex]
Total full up the tube [tex]=[/tex] rate [tex]\times[/tex] time
[tex]T=r \times t[/tex]
[tex]227 \mathrm{~cm}$$=12.9 \mathrm{~cm}^{\circ} / \mathrm{s} \times t[/tex]
[tex]t=\frac{227}{12.9}[/tex]
[tex]=17.5968s[/tex]
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.Roshan applied a force of 144 N to the side of a cube-shaped wooden block to slide it away from himself . Assuming that he applied the force on the entire surface of the side of the cube , each side measuring 4cm , what was the magnitude of pressure applied on the said surface ?
Area=side^2=4^2=16cm^2=0.0016m^2
Force=144N[tex]\\ \sf\longmapsto Pressure=\dfrac{Force}{Area}[/tex]
[tex]\\ \sf\longmapsto Pressure=\dfrac{144}{0.0016}[/tex]
[tex]\\ \sf\longmapsto Pressure=90000Pa[/tex]
This question can simply be solved by the use of the basic formula of pressure.
The magnitude of pressure applied on the surface is "90000 Pa" (OR) "90 KPa".
The pressure is defined as the force applied per unit area in the normal direction. The pressure applied on a surface can be given by the following formula:
[tex]Pressure=\frac{Force}{Area}\\\\Pressure=\frac{144\ N}{(0.04\ m)^2}[/tex]
where,
Area of Square Surface = Side² = (0.04 m)²
Therefore,
Pressure = 90000 Pa = 90 KPa
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The attached picture shows pressure.
what is practical machine?
Explanation:
A practical machine is a simple machine that losses energy and have parts that have weights, friction and it causes some loss of work done.
Air Rockets can be a fun way of investigating forces. When a air rocket is launched compressed air
forces the cardboard rocket off the launcher and up into the air.
• Name the forces acting on the rocket at the top of it's flight.
. Are the forces at the top of the flight balenced or unbalenced?
• Describe how the size and direction of the air resistance force changes during flight, an state
the definition of friction.
What is the manipulated variable?
Answer:
ore specifically, in an experiment, a variable can cause something to change, be the result of something that changed, or be controlled so it has no effect on anything. Variables that cause something to change are called independent variables or manipulated variables.
Explanation:
Which calculation is an example of velocity?
A. 10 m/s to the right
B. 10
C. 10 m/s
Answer: C, 10 m/s
Explanation:
A skydiver is falling with a force of 1500 N while the upward force of air resistance is 1000 N. The skydiver’s force is and
has a net force of .
The skydiver is
unbalanced; net force = 500 N; accelerating
unbalanced; net force = 500 N; at terminal velocity
balanced; net force = 1500 N; moves to the left
balanced; no net force; at terminal velocity
It will be unbalanced and at terminal velocity
Now
[tex]\boxed{\sf F_{net}=F_1-F_2}[/tex]
[tex]\\ \sf\longmapsto F_{net}=1500-1000[/tex]
[tex]\\ \sf\longmapsto F_{net}=500N[/tex]
Option b is correct
Which velocity graph shows the car moving toward the right (away from the origin) at a steady (constant) velocity? 
Explanation:
[tex]\text{Velocity is defined as the average displacement per unit time.}[/tex]
[tex]\text{Since the car is moving at a steady velocity, the velocity does not change over time, it shows a horizontal line on the }v-t\text{ graph}[/tex]
[tex]\text{Therefore, only option 2,5,8 matches this requirement.}[/tex]
[tex]\text{Since the car is moving to the right, which is defined as the positive direction in this question, the velocity (}v\text{) is also positive.}[/tex]
[tex]\text{Therefore, only option 5 is correct.}[/tex]
The graph marked with number [5] is the correct graph.
We have a Car.
We have to select the graph which shows that the car is moving toward the right (away from the origin) at a steady (constant) velocity.
What is the acceleration of body moving with constant velocity ?The acceleration of the body at constant velocity is 0.
According to the question -
For constant velocity, the acceleration of the car will be zero. Now, if we plot the velocity - time graph for this motion considering that the car is moving away from the origin, then the graph marked with number [5] will be the correct choice since the velocity is constant (say v) throughout the time and the motion is along right of origin.
Hence, the graph marked with number [5] is the correct graph.
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What is a description for this lionfish?
the lionfish, a longstanding showstopper in home aquariums, is a flourishing invasive species in U.S. Southeast and Caribbean coastal waters. This invasive species has the potential to harm reef ecosystems because it is a top predator that competes for food and space with overfished native stocks such as snapper and grouper. Scientists fear that lionfish will also kill off helpful species such as algae-eating parrotfish, allowing seaweed to overtake the reefs. In the U.S., the lionfish population is continuing to grow and increase its range. This is largely because lionfish have no known predators and reproduce all year long; a mature female releases roughly two million eggs a year.
Plz answer this question
The answer will be pressure.
Pressure is force per unit area.
variation of gravity with depth ??
As we go down the earth, we are moving towards the centre of the earth therefore the distance between us and center of the earth reduces and hence there is reduction in force acting on us by earth i.e gravity.
A car went 465km, how far did it go in meters
Answer:
465000 meters
Explanation:
kilometer to meter = ×1000
465 × 1000 = 465000
Answer:
465000 M
Explanation:
1Km = 1000m
465Km= (465)(1000)
465000
Which of the following is an example of a vector quantity
A) a student walks 2.0km north
B) an object has a mass of 10.5 kg
C) A 1.0 kg object moves at 18 m/s
D) a ball has an instantaneous speed of 15 m/s
Answer:
A
Explanation:
A vector is a physical quantity that has magnitude and direction, so with A having a magnitude of 2.0km and a direction pointing north⬆️
Hope its helps
A house is advertised as having 1560 square feet under roof. What is the area of this house in square meters?
Answer:
1 m = 3.28 ft
1 m^2 = 10.76 ft^2
1560 ft^2 / 10.76 ft^2 / m^2 = 145 m^2
A student drops a rock off a 5.0 meter cliff. If we ignore air resistance, how long will it take the rock to strike the water below?
Answer:
0.71 s
Explanation:
The formula used will be the formula for a free falling object acted on by gravity.
Time/Period(T) = √[Length/Distance(L)]/[Acc'n due
to gravity(g)]
T = √[5m/9.8m/s²]
T = 0.71 s
In physics, what is the positive and negative sign used for when applied to velocity and acceleration?
Answer:
the positive and negative signs are used to show different directions of acceleration and velocity
Explanation:
for example, if a car was moving forward, you would usually express it with a positive sign. If the car started moving backwards, you would show that backwards motion with a negative sign.
A helicopter flies 25 km north, 5 km east, then 5 km S, then 15 km W. What is the resultant displacement and direction of the helicopter? Solve using graphical or mathematical methods. Be sure to either show work or explain your graphical methods.
Answer:
Explanation:
Plotting the original location of the helicopter before it flies 25 km north, it would be at the origin, (0,0) then after it flies north, the y vertex gains 25 points, so it would be (0,25)
After it flies east, the x coordinate gains 5 points, so it would now be (5,25)
After it flies south, the y coordinate loses or is subtracted by 5 points. so it would now be (5,20)
After flying west, the x coordinate loses 15 points. So the final vertex would be at (-10,20)
East = Right
West = Left
South= Down
North = Up
I used mainly mathematical methods by adding and subtracting the x and y coordinate values, but this could be graphed easily since I gave the coordinates just incase!
Hope this helps!
Answer:
Explanation:
D = Xf - X
D = 15km West - 25km North
D = -10km West
Which two types of energy does a book have as it falls to the floor?
A. Kinetic energy
B. Nuclear energy
C. Light energy
D. Magnetic energy
E. Potential energy
Answer:
A and E
Explanation:
because of gravitational pull
Answer:
Its A and E :))
Explanation:
What is the name of the distance that is 103 larger than a meter
Answer:
kilometer
Explanation:
kilometer is larger than the meter
help me please i dont understand
A scientist adds different amounts of salt to 5 bottles of water. She then
measures how long it takes for the water to boil. What is the responding
variable in this experiment?
O A. The time it takes for the water to boil
O B. The amount of salt added to the water
C. The kind of bottles used
D. The brand of salt used
Answer:
A. The time it takes for the water to boil
It is because salt was added into the water. So the responding variable is the time taken to boil the water.
hope this help u. good luck
1. What type of waves does light travel in? 1.Transverse waves 2.Longitudinal waves
plz help someone
Answer:
Transverse waves
Explanation:
Light moves in waves. Light waves are different from sound waves in that light travels in transverse waves (as opposed to longitudinal, which is how sound waves travel). A light wave that travels in a direction is called a light ray.
The light waves travel as Transverse waves. Therefore, option (1) is correct.
What are Transverse waves?Transverse waves can be defined as waves that usually oscillate along paths that are perpendicular to the direction in which the wave is traveling. Examples of transverse waves involve the vibration of the guitar, electromagnetic waves, water surface ripples, primary waves of the earthquake, and seismic S waves.
Particles of matter in a transverse wave, oscillate up and down about their mean location rather than follow the path of the transmission of the wave.
A transverse wave can be described as every particle of the medium traveling around its mean position in an opposite direction of the propagating direction of the wave.
Transverse waves can be produced in solids and on the surface of liquids. Transverse waves are not possible to create in liquids or gases. Therefore, electromagnetic waves or light waves travel as Transverse waves.
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help please! this is physics !
Answer:
4. The choose b. 0.000355
Ans; 3.55× 10-⁴ = 0.000355
5. The choose C. 80600
Ans; 8.06 ×10⁴= 806×10² = 80600
I hope I helped you^_^
A car starts from rest and accelerates at 5 m/s/s.
a) what is the position of the car after 4 seconds?
b) what is the speed of the car after 4 seconds?
c) how long will it take the car to travel 100 meters?
d) how long will it take the car to reach 30 m/s?
Please find attached photograph for your answer. Hope it helps. Please do comment
Dean Potter is known for slacklinging across a 915 metter deep ravine in Yosemite National Park with no safety gear. If his mass is 77 kg, how much potential energy did he have?
Explanation:
answer 689910
M x G x H
mass = 77
G= 9.8
Meter = 915 this is the height
77 x 9.8= 754.6
754.6 X 915 = 689910 J
Dean Potter is known for slacklining across a 915-metter deep ravine in Yosemite National Park with no safety gear. If his mass is 77 kg then he has the potential energy of 691163.55 Joules
What is mechanical energy?As total mechanical energy is the sum of all the kinetic as well as potential energy stored in the system.
ME = KE + PE
As given in the problem Dean Potter is known for slacklining across a 915-meter deep ravine in Yosemite National Park with no safety gear. If his mass is 77 kg,
m =77 kg
h = 915 m
the total potential energy of the dean potter can be calculated withe the help of the formula of the potential energy
PE = mgh
PE = 77*9.81*915
PE = 691163.55 Joules
Thus, he would have the potential energy of 691163.55 Joules
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Speed depends on how far something travels and
Question 1:
Answer: I think the answer is C
A bicycle starts at 50 m from an intersection. ten seconds later the bicycle is 85 m from the same intersection what is the slope of the bicycles position versus time graph 5 s after it starts assume constant velocity motion
Answer:
use the formula of slope=(x₂-x₁)/(y₂-y₁)
Explanation:
The slope of the bicycle's position versus time graph 5 s after it starts to assume constant velocity motion would be 7 meters/second.
What is Velocity?The total displacement covered by any object per unit of time is known as velocity. It depends on the magnitude as well as the direction of the moving object.
velocity slope =change in the position of the object /change in time
As given in the problem a bicycle starts at 50 m from an intersection. ten seconds later the bicycle is 85 m from the same intersection,
change in the position of the bicycle = 85-50
= 35 meters
change in the time = 10 -5 seconds
= 5 seconds
slope = 35 meters/5 seconds
= 7 meters/second
Thus, the slope of the bicycle's position versus the time graph would be 7 meters/second.
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