Help I need it please
Astronauts working on the International Space Station (ISS) experience
weightlessness as they travel the earth's orbit. Which statement correctly describes
the forces acting on an astronaut on the ISS?
Answer:
This question is incomplete
Explanation:
This question is incomplete because of the absence of options. However, Astronauts working in space do not have any external force acting upward or downward on them; meaning there is no contact force pushing or pulling there body and thus experience/feel weightlessness. This causes them to be in a state of constant free fall when they are orbiting the earth. This free fall is similar to what is experienced in elevators and roller coasters in amusement parks.
Question 19 of 20
8 44%
Look at the diagram. To overcome the friction force, the man could use a slippery
substance like oil or graphite spray on the floor. These substances are examples of
what?
Enter your answer
Answer:
Dry luricants
Despite being in a solid phase they are able to reduce friction
I’m not sure because I’ve shave the learnt about much of this sorry
A hole is punched at A in a plastic sheet by applying a 660-N force P to end D of lever CD, which is rigidly attached to the solid cylindrical shaft BC. Design specifications require that the displacement of D should not exceed 15 mm from the time the punch first touches the plastic sheet to the time it actually penetrates it. Determine the required diameter of shaft BC if the shaft is made of a steel with G.
Answer:
hello your question lacks some data and required diagram
G = 77 GPa, т all = 80 MPa
answer : required diameter = 252.65 * 10-^3 m
Explanation:
Given data :
force ( P ) = 660 -N force
displacement = 15 mm
G = 77 GPa
т all = 80 MPa
i) Determine the required diameter of shaft BC
considering the vertical displacement ( looking at handle DC from free body diagram )
D' = 0.3 sin∅ , where D = 0.015
hence ∅ = 2.8659°
calculate the torque acting at angle ∅ of CD on the shaft BC
Torque = 660 * 0.3 cos∅
= 660 * 0.3 * cos 2.8659 = 198 * -0.9622 = 190.5156 N
hello attached is the remaining part of the solution
The required diameter of shaft BC will be 252.65 ×10⁻³A shaft's diameter is the line that goes through its center and splits it into two equal halves.
What is the diameter?A diameter is a line that travels through the center of a sphere and intersects the circumference at opposing ends. It measures twice as long as the sphere's radius
The given data in the problem is;
P is the force = 660 N
d is the displacement = 15 mm
G is the constant= 77 GPa
τ is the shear stress= 80 MPa
From the torsional equation;
[tex]\frac{\tau}{R} =\frac{T}{j} \\\\ \frac{\pi}{32} \times d^4=\\\\ \tau =\frac{T \times R}{J} \\\\\ \tau =\frac{T \times (\frac{d}{2} )}{J} \\\\ 80= \frac{32 \times 190 \times \frac{d}{2} }{\pi} \\\\\\d=252.65 \times 10^{-3}[/tex]
Hence the required diameter of shaft BC will be 252.65 ×10⁻³.
To learn more about the diameter refer to the link;
https://brainly.com/question/5501950
compare and contrast linear relationship and nonlinear relationship
Explanation:
The graph of a linear equation forms a straight line, whereas the graph for a non-linear relationship is curved. ... A non-linear relationship reflects that each unit change in the x variable will not always bring about the same change in the y variable
A car sets off from traffic lights. It reaches a speed
of 27 m/s in 18 s. What is its acceleration?
1. to
Answer:
1.5 m/s^2
Explanation:
a = velocity/time
27/18 = 1.5 m/s^2
A jet’s original velocity is 600 m/s. After 20 seconds accelerating at 8 m/s 2 , how
fast is it going?
Answer:
760 m/sExplanation:
The jet's speed or final velocity can be found by using the formula
v = u + atwhere
v is the final velocity
u is the initial velocity
t is the time taken
a is the acceleration
From the question we have
v = 600 + 20(8)
= 600 + 160
We have the final answer as
760 m/sHope this helps you
Why is the car industry a good example of energy efficiency and human technology over time?
Answer:
Fortunately, the potential for higher energy efficiency is great. ... For example, landlords of rental residential buildings are not motivated to pay for ... it over time, and the timeframes in which specific technologies can be expected to ... especially for small firms, and many industries prefer to expend their human and financial.
4 Energy Efficiency | America's Energy Future: Technology. this is a site
Explanation:
Answer:
the car industry is one of the most important industry in the world as it aid easy transportation of goods and man.
Explanation:
cars and other automobiles have aid easy movement of people and goods from one place to another as it is more efficient (does not waste time as compared to traditional means of transportation.)and reliable.
Which fluid is more dense, water or air?
(Yes, I know that air isn't a fluid, but it's the actual question made by my teacher lol)
Answer:
water
Explanation:
water is 1000 kg/m3 while air is 1.225 kg/m3
When a substance is heated it can..... (Select all that apply)
a) Change from solid to liquid
b) get warmer
c) get colder
d) chafe form has to liquid
what type of service does time safari, inc. provide?
Answer:
Explanation:
“The Sound of Thunder” is set in the year 2055. Time Safari, Inc. offers time-travel opportunities to hunt and kill exotic and now-extinct animals. In the hunt described in the story, the team of two guides and three hunters goes back to prehistoric days in order to kill the largest dinosaur of them all, a Tyrannosaurus rex. The business has already put safety precautions into place so that these trips can be made without unduly impacting the future. The animals that are killed are ones that have already been identified as doomed. For example, the T rex in question was going to be killed by a falling tree anyway. The safari leaders also built a path for visitors to step on so that no element of the past setting is tampered with. Even the slightest misstep could have implications for the future.
Amy is driving her 2400 kg car down the road, and the car produces a force of 7200 N. How fast is Amy accelerating?
Answer:
The acceleration of Amy's car is 3 m/s²
Explanation:
Given;
mass of Amy's car, m = 2400 kg
force of the car, F = 7200 N
According to Newton's second law of motion, the force of the car is given as;
F = ma
where;
a is the acceleration of the car
Substitute the given parameters and solve for acceleration;
a = F / m
a = (7200) / (2400)
a = 3 m/s²
Therefore, the acceleration of Amy's car is 3 m/s²
A motorcyclist travelling at 30m/s starts to apply his brake when he is 50m from the traffic light that has just turned red .if he reached the traffic light. what is the deceleration
a
Answer:
9m/s²
Explanation:
Given parameters:
Initial velocity = 30m/s
Final velocity = 0m/s
Distance traveled = 50m
Unknown:
Deceleration = ?
Solution:
To solve this problem, we apply the proper motion equation;
V² = U² + 2aS
V is the final velocity
U is the initial velocity
a is the acceleration
S is the distance
Insert the parameters and solve;
0² = 30² + 2(a)50
-900 = 100a
a = -9m/s²
The negative value indicates deceleration.
The motorcycle decelerates at a rate of 9m/s²
When a substance is heated it can..... (Select all that apply)
a) Change from solid to liquid
b) get warmer
c) get colder
d) change from a gas to liquid
Juana is creating a lab simulation about the movement of the particles in a nonmetal gas. The user can change the pressure in the gas' temperature and see the effect of the change in the gas' volume. What changes should Juana program to cause the decrease in the gas' volume?
Answer:
Increase gas pressure and decrease gas temperature
Explanation:
To Create a lab simulation whereby the changes in pressure exerted on the gas will affect the volume of the gas volume negatively ( decrease in gas volume ) the changes that Juana should program is to increase the pressure on the gas molecules because increase in gas pressure = decrease in gas volume while increase in temperature will lead to increase in gas
Hence in order to effectively achieve the decrease in gas volume with the lab simulation; she should increase gas pressure and decrease gas temperature
Answer:
pressure then volume
Explanation:
edge chemistry 2021
what is 40% of 230 i need to know soon plz im only 7
Answer:it's 92 my friend
Explanation:
have a great day
Answer:
92
Explanation:
0.4 · 230 = 92
Calculate the kinetic energy of a 1 kg object moving at 4.5 ms. Round to the first decimal.
Answer:
91.21
Explanation:
Kinetic energy =1/2 mv2 substitute the values I. E 1/2 *1 *4.5^2= 91.21
A net force of 124.0 N is applied to a certain object. As a result, the object's acceleration is 71.0 m/s/s. What is the mass of the object?
Answer:
[tex] \huge{ \boxed{ \sf{1.74 \: kg}}}[/tex]
☯ Question :
A net force of 124.0 N is applied to a certain object. As a result , the object's acceleration is 71.0 m/s/s ( m/s ² ). What is the mass of the object ?☯ [tex] \underbrace{ \sf{Required \: Answer: }}[/tex]
☥ Given :
Net force = 124.0 NAcceleration = 71.0 m/s☥ To find :
Mass of an object✎ We know :
[tex] \boxed{ \sf{net \: force = mass \: \times \: acceleration}}[/tex]
Substitute all the values and solve for m
➛ [tex] \sf{124.0 = mass \times 71.0}[/tex]
➛ [tex] \sf{71.0 \: mass = 124.0}[/tex]
➛ [tex] \sf{ \frac{71.0 \: mass}{71.0} = \frac{124.0}{71.0}} [/tex]
➛ [tex] \sf{mass = 1.74 \: kg}[/tex]
Hope I helped!
Have a wonderful time ツ
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Mr. Palmer's dog is running at you at a a speed of 3.8 m/s. She has a KE of 231.04 J. How massive is Mr. Palmer's dog?
answer
Answer:
32kg
Explanation:
Given parameters:
Speed of the dog = 3.8m/s
Kinetic energy = 231.04J
Unknown:
Mass of Mr.Plamer's dog = ?
Solution:
Kinetic energy is the energy due to the motion of a body;
Mathematically, it is represented as;
K.E = [tex]\frac{1}{2}[/tex] m v²
m is the mass
v is the velocity
Insert the parameters and solve;
231.04 = [tex]\frac{1}{2}[/tex] x m x 3.8²
231.04 x 2 = 2 x [tex]\frac{1}{2}[/tex] x m x 3.8²
462.08 = 14.44m
m = 32kg
4. A small rocket with a mass of 2000 g (hint: grams) accelerates at 8.3 m/s/s as it launches into the sky. How much force is acting on the rocket?
Answer:
16.6N
Explanation:
Given parameters:
Mass of rocket = 2000g = 2kg
Acceleration = 8.3m/s²
Unknown:
Force acting on the rocket = ?
Solution:
The force acting on a body can be derived from the product of its mass and acceleration;
Force = mass x acceleration
Insert the parameters and solve;
Force = 2 x 8.3 = 16.6N
How much does the earth weigh??
The force exerted by a moving 100 kg object is 1,000 newtons. What is the acceleration of the object?
Answer:
10 m/s²
Explanation:
Force is the product of mass of an object and its acceleration
The formula is : F= m*a -----where m is mass and a is acceleration
Use the values given in the equation as;
F= m*a
1000 = 100 * a
1000/100 = a
10 = a
10 m/s² = a
If a 40 kg pumpkin is thrown through your neighbors window with an acceleration rate of 2 m/s, what’s the force you through it with?
Answer:
[tex]\boxed {\boxed {\sf 80 \ Newtons}}[/tex]
Explanation:
Force can be found by multiplying the mass by the acceleration.
[tex]F=m*a[/tex]
The mass of the pumpkin is 40 kilograms.
The acceleration of the pumpkin is 2 meters per second squared.
[tex]m= 40 \ kg \\a= 2 \ m/s^2[/tex]
Substitute the values into the formula.
[tex]F= 40 \ kg *2 \ m/s^2[/tex]
Multiply.
[tex]F= 80 \ kg*m/s^2[/tex]
A kilogram meter per second squared is equal to 1 Newton. Therefore, our answer of 80 kg*m/s² is also equal to 80 Newtons (N).
[tex]F=80 \ N[/tex]
The force is 80 Newtons.
Answer:
80 newton
Explanation:
F=ma so we now substitute our values I. E 40kg*2m/s=80 Newton
What results when energy is transformed while juggling three bowling pins?
Answer:
his is an example of the transformation of gravitational potential energy into kinetic energy
Explanation:
The game of juggling bowling is a clear example of the conservation of mechanical energy,
when the bolus is in the upper part of the path mechanical energy is potential energy; As this energy descends, it becomes kinetic energy where the lowest part of the trajectory, just before touching the hand, is totally kinetic.
At the moment of touching the hand, a relationship is applied that reverses the value of the speed, that is, now it is ascending and the cycle repeats.
Therefore this is an example of the transformation of gravitational potential energy into kinetic energy
What is the magnitude of the velocity after it hits the ground?
Answer:
Multiply the time by the acceleration due to gravity to find the velocity when the object hits the ground. If it takes 9.9 seconds for the object to hit the ground, its velocity is (1.01 s)*(9.8 m/s^2), or 9.9 m/s.
Explanation:
After carrying out a scientific investigation, Dr. Jones thinks she has just discovered new information about gravity. How should she best communicate her findings with other scientists? *
Post her discovery on the internet as fact.
Try to find new information on another topic.
Publish her discovery for other scientists to test.
Call her friends and tell them about the discovery
Answer:
Publish her discovery for other scientists to test.
Explanation:
In the context, Dr. Jones, a famous scientist conducted some experiment and has been working hard on it. She recently discovered some new information and facts about gravitation.
Now the best way to communicate and show her new discovery and results on gravity with the other scientist is to publish her findings in a famous science journal so that other scientist can work on it and make some test to find the same results.
By doing this, other scientist can work on her idea and she can tell and communicate her discovery with the other scientist and physicists.
A cartoon shows two friends watching an unoccupied car in free fall after it has rolled off a diff. One friend says to the other, "It goes from zero to sixty mphin about three seconds." Is this statement correct? (Note that 60 mph converts to 26.8 m/s.)
Answer:
The statement is not correct.
Explanation:
To know if the statement is correct, we shall determine the velocity of the car after 3 s. This is illustrated below.
Data obtained from the question include:
Initial velocity (u) = 0 m/s
Acceleration due to gravity (g) = 9.8 m/s²
Time (t) = 3 s
Final velocity (v) =?
v = u + gt
v = 0 + (9.8 × 3)
v = 0 + 29.4
v = 29.4 m/s
Thus, the velocity of the car after 3 s is 29.4 m/s.
Hence, the statement made by the friend is not correct as the car has a falling velocity of 29.4 m/s after 3 s.
if you can answer all of these questions, you are a genius.
1. What is matter made of?
2. Define matter.
3. Give 3 examples of things that are made of matter.
4. What is the difference between solid, liquid, and gas?
5. What is a chemical reaction?
6. Explain the difference between the reactants and products.
7. Do you have any plans for Halloween and the break?
Answer:
1.matter made of mass and volume
2.matter is any substance that has mass and takes up a space by having a volume
3.table, coffee, and perfume
4.solid has a strong bonds, liquid has weak bond, and gas no bond
5
A 244.0 N block is at rest on a flat, frictionless table. A hooked cable applies an upward force of 24.0 N on the block. What is the normal force acting on the block?
Answer:
268N
Explanation:
The upward force acting on the block are the reaction and the hooked table..
The total normal force acting = normal reaction + 24N
Note that the normal reaction is always equal the weight of the table
Hence the normal force acting in the block is 244.0+24 = 268.0N
Which item is needed for clouds to develop?
Snow
Grass
Rain
Dust in the Air
(will mark brainliest)
Answer:
snow or rain
Explanation:
i know it has to be some kind of water , but I just don't know which one sadly . hope this helped :) !
Answer:
dust . i did this
Explanation: