Answer:
2:1
Explanation:
It is given that,
Two particles A and B move at a constant speed in circular paths at the same angular speed ω.
Particle A's circle has a radius that is the length of particle B's circle.
We need to find the ratio of vA/vB of their translational speeds.
As the angular speed is same. The relation between angular and linear speed is given by :
[tex]\omega=\dfrac{v}{r}\\\\\omega_A=\omgega_B\\\\\dfrac{v_A}{r_A}=\dfrac{v_B}{r_B}[/tex]
As [tex]r_A=2r_B[/tex]
So,
[tex]\dfrac{v_A}{2r_B}=\dfrac{v_B}{r_B}[/tex]
[tex]\dfrac{v_A}{v_B}=2[/tex]
So, the ratio of their translational speeds is 2:1.
4. A hiker leaves camp and using a compass walks 4 km East, 6 km South, 3 km East, 5 km North, 10 km West, 8 km North and 3 km South. What is his total displacement?
Answer:
Because the hiker walked directly west and then directly north the two legs of the hike forms a right triangle. Therefore we can use the Pythagorean Theorem to solve this problem.
c=5
The hiker is 5km from camp and should head in a generally south-east direction
3. When should we perform stretching in relation to exercise (before, after or during), and what type of stretching should we be performing?
There is some evidence that regular static stretching outside periods of exercise may increase power and speed, and reduce injury. The best time to stretch is when the muscles are warm and pliable. This could be during a yoga or pilates class, or just after exercising.
Question: What is this? (look in image attached)
Answer:
C. all of the above.
Explanation:
up at the top it says solar power bank.
in the boxes below it says LED flashlight and solar energy.
it is all of the above.
. How much power is used to move a 5 kg mass 28 meters in 8 seconds?
Answer:
171.5Watts
Explanation:
Given parameters:
Mass = 5kg
Distance = 28m
Time = 8s
Unknown:
Power = ?
Solution:
Power is the rate at which work is done;
Power = [tex]\frac{work done }{time taken}[/tex]
Work done = force x distance = mg x d =
m is the mass
g is the acceleration due to gravity
d is the distance
Work done = 5 x 9.8 x 28 = 1372J
Power = [tex]\frac{1372}{8}[/tex] = 171.5Watts
Can an object have a speed of zero while it's acceleration is not zero
give me 1 example of complete inelastic collision
i hope it helped thanks
Do you think scientists should continue to explore nuclear energy as a source of electricity? Explain your opinion and provide reasons. Include an opposing opinion about another energy source.
Answer:
See explanation
Explanation:
Nuclear energy refers to energy trapped in the nucleus of atoms. Nuclear energy holds the greatest promise for large scale electricity generation. For instance, the amount of energy released by a given mass of uranium is 2.5 million times the energy released by combustion of an equal mass of carbon.One gram of uranium produces the same energy as 1 ton of coal, 17000 cubic feet of natural gas, 5000 pounds of wood and 149 gallons of oil.
Nuclear energy does not pollute the atmosphere as fossil fuels do. However, the challenges of effective control of the nuclear reactor and disposal of radioactive waste still remain a serious concern.
However, exploitation of nuclear energy as a source of electricity remain expensive and it is not quite easy to set up a nuclear power plant. Not many countries can afford to pay for the services of experts who operate nuclear energy plants talk more of providing the required equipment.
Density differences in different materials are able to change the _____________ of a wave.
Amplitude
Crest
Speed
Trough
Answer:
speed
Explanation:
A teacher walks back and forth in front of the room during a lesson. He starts at one end of the desk and walk from the door to the window a distance of 4.0m in 5 s. Then he stops, turn around and walk 2.0 m back toward the door in 3 s. He stops here for 10 s and then walk 3 meters toward the door in 6 s. Deduce the average speed of the teacher over the entire 24 s interval?
Answer:
0.375 m/s
Explanation:
The average speed of an object or a body is given by:
total distance traveled/total time taken
In the case of the teacher who walked back and fort:
Total distance traveled = 4.0 + 2.0 + 3 = 9 meters
Total time taken= 24 s
Hence,
Average speed of the teacher = 9/24
= 0.375 m/s
Please answer science question!!!
Answer:
from the sea towards the land
Answer:
sea to land
Explanation:
because the tide is coming in
In the middle of a thunderstorm, a lightning bolt flashes. It takes Roberto 5 seconds to
hear the thunder afterwards. How far is the source of lightning from Roberto? The temperature is 22° C.
Speed of sound at 22°C = ?
d = ?
You will be reported if you didn't answer properly
Answer:
v = 344.1 m / s
d = 1720.5 m
Explanation:
For this problem we must calculate the speed of sound in air at 22ºC
v = 331 RA (1+ T / 273)
we calculate
v = 331 RA (1 + 22/273)
v = 344.1 m / s
the speed of the wave is constant,
v = d / t
d = v t
we calculate
d = 344.1 5
d = 1720.5 m
1. What is the pull that all objects exert on each other?
2. What is a push or pull that acts on an object?
3. Can objects going in different directions at the same speed have the same velocity? Why or why not?
4. If 1 car is going faster than another traveling in the same direction, can they have the same velocity? Why or why
not?
5. Explain the last part of the 3rd Law, for every action there is...?
6. 1st Law- an object at rest will remain at rest unless...?
7. If 2 objects are exerting a force on each other and theydon't move, the forces must be...?
Answer:
Im pretty sure 1 is gravity, 2 is force
Explanation:
Please help me with this question :(
I have a test soon and I want to be prepared..
Detailed solutions please!
(I’ll give you 25points)
Answer:
[tex]\boxed{\text{\sf \Large 50 N}}[/tex]
Explanation:
Sum of the vertical forces is zero
F₁ + F₂ - Z = 0
Z is negative since Z acts in the opposite direction from F₁ and F₂
30 + 20 - Z = 0
Z = 50
If you know these plz help me out:)
Answer:
1. Attacking the person
2. Stress fractures
Explanation:
If this helps this is on my opinion and I need do my best to help you:)
Two pieces of metal with exactly the same mass are placed on a surface in bright sunlight. The temperature of the 1st block increases
by 3°C while the temperature of the 2nd increases by 8°C. If the specific heat of the 2nd block is 0.24 J/g-K, what is the specific heat of
the 1st block?
A)
0.3 /g-K
B)
0.64 J/g-K
1.2 J/g-K
D)
1.56J/g-K
Answer:
The specific heat of the 1st block is B. 0.64 J/g-K
Explanation:
Answer:
B
Explanation:
it is the specific heat
Please help me What will happen to an object if it is put into motion in space? A It will stop eventually B It will continue to move until it is acted upon by an unbalanced force C It will speed up over time D It will slow down over time
I think your answer is b.
An orange of mass m falls into a wagon. Assume the orange experiences upward acceleration magnitude a
when it comes in contact with the wagon.
What is the correct expression for the normal force magnitude Fn exerted on the orange?
Answer:f^n=m(a+g)
Explanation:khan academy said
In any ecosystem_______, are the point of entry for new energy
Answer:
The answer is Producer. Hope this helps!
Answer:
Producer
Explanation:
They keep the food chain stable... without producers there wouldnt be and animals. They are the key to the food chain.
PLEASE HELP!
Picture 1: Draw the force diagram for Mı if there is
friction on the table.
Picture 1: Draw the force diagram for M4 if there is
friction on the table.
Answer:
When a body is placed on a table top, it exerts a force equal to its weight downwards on the table top but does not move or fall. (i) Name the force exerted ...
which object has the most kinetic energy a truck going 100 miles per hour or a motorcycle going 100 miles per hour
Answer:
The truck
Explanation:
Kinetic energy is directly proportional to mass. Since the truck has more mass, it will have more energy.
What happens when the force of friction is more than the force of a moving object?
The object will slow down.
The object will be unaffected.
The object will continue at the same speed.
The object will speed up.
Inertia is a force which brings all objects to a rest position. Fast-moving objects have more inertia than slow-moving objects. False - The speed of an object has no impact upon the amount of inertia that it has. Mostly True - Two objects of the same mass can weigh differently if they are located in different locations.
I don't know if this will help
please help ASAP
a substance of mass 10kg with the dimension as 5cm by 4cm by 10cm. What is the density of true substance?
Answer:
5cm by 4cm by 10cm = 200
200 / 10 = 20
20 :>
which two changes would increase the electric force between two charged particles
In electrostatics, the electrical force between two charged objects is inversely related to the distance of separation between the two objects. Increasing the separation distance between objects decreases the force of attraction or repulsion between the objects.
hope this helped
(c) Why is the telescope adjusted for a distant object in a spectrometer
Answer:
The telescope is adjusted to receive parallel rays by turning it towards a distant object and adjusting the distance between the objective lens and the eyepiece to get a clear image on the cross wire.
The telescope is turned towards a far-off object, and the distance between the objective lens and the eyepiece is adjusted to produce a clear image on the cross wire.
What is telescope?A telescope is a tool for creating enlarged views of far-off things. The telescope is without a doubt the most significant research tool in astronomy. It offers a way to gather and examine radiation coming from astronomical objects, even those at the edge of the cosmos.
When Galileo used the telescope to investigate alien bodies in the early 17th century, he revolutionized astronomy.
Magnification tools had never been employed for this purpose before until that point. The distance between the objective lens and the eyepiece is adjusted to provide a crisp image on the cross wire as the telescope is pointed towards a distant object.
Learn more about telescope here:
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a kid uses a slingshot to shoot a rock at a target. when the kid applies a net force of 8.68 N forward, the rock accelerates at a rate of 12.4 m/s^2 forward. What is the rocks mass?
Answer:
0.7kg
Explanation:
Given parameters:
Force on the rock = 8.68N
Acceleration = 12.4m/s²
Unknown:
Mass of the rock = ?
Solution:
From newton's second law of motion, the net force on a body is the product of mass and acceleration
Net force = mass x acceleration
Now insert the parameters and solve the problem;
8.68 = mass x 12.4
mass = [tex]\frac{8.68}{12.4}[/tex] = 0.7kg
True or False
It takes much more force to blast a soft ball 50 meters than it does to hit a golf ball 50 meters.
Answer:
False
Explanation:
The softball is bigger, but it is lighter, which means it has a better chance of getting farther way faster with a lighter amount of force. On the other hand, the golfball is heavier, which would take more force to move it a certain distance.
Answer: false
Explanation:
• Defines what the “natural” states of motion are, either at rest and constant
velocity. In essence, the first law sets up the basis to define what accelerated
motion is, which we address with Newton’s 2nd law.
• Defines the type of coordinate systems so that Newton’s laws are valid. These
coordinate systems are called inertial reference frames.
Calculate the pressure exerted by mercury column of 76cm high at its bottom. Given that the density of mercury is 13600kg/m³ and g=9.8 m/s².
Answer:
P = 101292.8
Explanation:
Use
Pressure p = H D g
H = height ( in metric)
D = density ( in metric )
g = gravity
So
H = 76 cm = 0.76 m
D = 13600 kg/m3
And g = 9.8
P = HDg
= 0.76× 13600×9.8
= 101292.8 pascal
Or = 1.012928 × 10^5
Answer:
sudeep is correct hope it's help you have a great day ☺☺keep smiling be happy stay safe
PLEASE HELP FAST!!!
WILL MARK BRAINLIEST!!!!
This is a Earth Science course 4.02
2. Mariner 4 and 9 and Viking 1 and 2 probes needed enhanced cameras and wireless communication equipment to take images of Mars's surface and send them back to Earth. According to the video, how did improving our technology lead to new discoveries about Mars?
3. Using internet resources, describe how advances in imaging and wireless communication for space exploration have led to changes in imaging devices and communication on Earth.
4. Mars Odyssey and Mars Express required spectrometric equipment that could analyze Mars's atmosphere and surface composition and temperatures. Using internet resources, describe some home or business technologies that use spectrometric equipment to analyze atmosphere or temperature.
5. Using internet resources, research one space probe described in the video. Describe its goals and justify its purpose by explaining how it helped advance our understanding of the universe.
Answer:
1.It improved by using the Mars survey probe, that took a portrait of the planet that helped us see the climate of Mars.
Explanation:
I watched the video.
Plz answer and I will give Brainlyest
Answer:
true
Explanation:
Answer:
True.
Explanation:
the diagram below shows different weights on the see-saw. Will the see-saw move?
Answer:
yes it will
Explanation:
As the net torque on the see-saw is not equal to zero, the see-saw in the given diagram will move.
What is torque?The force that can cause an object to rotate along an axis is measured as torque. In linear kinematics, force is what drives an object's acceleration. Similar to this, an angular acceleration is brought on by torque.
As a result, torque can be thought of as the rotational counterpart to force. Torque is referred to using a variety of terms, including moment and moment of force. The moment arm or lever arm is the measurement of the separation between the point of application of force and the axis of rotation.
The net torque on the see-saw = 3 N × 1.20m - 8 N × 0.50 m
= - 0.4 N-m.
As the net torque on the see-saw is not equal to zero, the see-saw move will move.
Learn more about torque here:
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