Answer: You do not deserve help, You dont help other people you only use them for points so...do not ask for help from us now
Explanation:
Why do bones weaken as a person gets older
Answer:
The bones aren't as strong as a younger person, because an older person, ages due to time and it also depend on what they do in their past.
Does this help? ^-^"
The four balls in the diagram below are made of the same material are sold
Why is the force of gravity between the balls in pair 2 greater than the force of gravity between the balls in pair 1
The balls in pair 2 are closer together than the balls in part 1
The balls in pair 2 have a grater mass than the balls in pair 1
The balls in pair 1 have more rolling friction than the balls in pair 2
The balls in pair 2 have more magnetic force than the balls in pair 2
Answer:
The balls in Pair 2 have a greater mass than the balls in pair 1.
Explanation:
I took the test.
A construction worker transfers 6000000 J in a n 8 hour day of work. What is their average power output? just need a quick answer with the working, thanks
Answer:
208.33 W
Explanation:
Using,
P = W/t.......................... Equation 1
P = Average power output, W = total work, t = total time.
From the question,
Given: W = 6000000 J, t = 8 hours = (8×60×60) = 28800 s
Substitute these values into equation 1
P = 6000000/28800
P = 208.33 W.
Hence the average power output is 208.33 W
True or false, not all substances are soluble in water.
Answer:
I think ur answer would be true
Explanation:
hope this helps
The 500 series bullet train travels between Tokyo and Hakata, Japan. If it is heading north with a momentum of 13,194,098.64 kg • m/s and at a velocity of 261.8 km/h, what is its mass?
Answer:
The mass of the 500 series bullet train is 181.4 tonnes.
Explanation:
The momentum is given by:
[tex] p = mv [/tex]
Where:
m: is the mass =?
v: is the velocity = 261.8 km/h
p: is the momentum = 13194098.64 kg*m/s
By solving the above equation for "m" we have:
[tex]m = \frac{p}{v} = \frac{13,194,098.64 kg*m/s}{261.8 km/h*\frac{1000 m}{1 km}*\frac{1 h}{3600 s}} = 181.4 tonnes[/tex]
Therefore, the mass of the 500 series bullet train is 181.4 tonnes.
I hope it helps you!
Electromagnetic waves are transverse waves. Which of the following
would best describe the motion of these waves?
A. The direction of movement is perpendicular to the direction of motion.
B. The direction of movement is parallel to the direction of motion.
C. They only move from place to place through a medium.
D. Their speed depends on the amount of mass contained in each photon.
Answer:
A
Explanation:
transverse waves are waves that travel perpendicular to the direction of the wave motion
whereas, longitudinal waves are waves that travel parallel to the direction of the wave motion.
hope this helps
please mark it
Brainliest for correct answer in newtons :)
Answer:
This is your answer
Answer:
120 N
Explanation:
1 N = 1kg
120 N = 120kg
Hope this helps!
A cement mixer with a radius of 2 m spins with a tangential velocity of 0.4 m/s. Determine the centripetal acceleration of a piece of dried cement stuck to the inside wall of the mixer.
Answer:
[tex]a=0.08\ m/s^2[/tex]
Explanation:
Given that,
The radius of the mixer, r = 2 m
Tangential velocity of the mixer, v = 0.4 m/s
We need to find the centripetal acceleration of a piece of dried cement stuck to the inside wall of the mixer. The formula for the centripetal acceleration is given by :
[tex]a=\dfrac{v^2}{r}\\\\a=\dfrac{(0.4)^2}{2}\\\\a=0.08\ m/s^2[/tex]
So, the centripetal acceleration is equal to [tex]0.08\ m/s^2[/tex].
The speed of light in air is 3 x 108 m/s. The speed of light in ice is 2.29 x 108 m/s. What is the refractive index from air to ice?
Answer:
η = 1.31
Explanation:
The formula for the refractive index of from air to some other medium is given by the following formula:
[tex]\eta = \frac{c}{v}\\[/tex]
where,
η = refractive index = ?
c = speed of light in air = 3 x 10⁸ m/s
v = speed of light in ice = 2.29 x 10⁸ m/s
Therefore, using these values in the equation we get:
[tex]\eta = \frac{3\ x\ 10^8\ m/s}{2.29\ x\ 10^8\ m/s} \\[/tex]
η = 1.31
In a ride in an amusement park, a carriage of mass 450 kg is travelling horizontally at a speed of 18 m/s. It passes through a shallow tank containing stationary water. The tank is of length 9.3 m. The carriage leaves the tank at a speed of 13 m/s. PT 3 a.) Calculate the change in kinetic energy of the cart while it passes through the water tank J (Hint: Change
Answer:
98.
Explanation:
divide
The change in the kinetic energy of the cart is equal to 34875 J.
What is kinetic energy?The energy which is possessed by a moving body because of its motion is known as kinetic energy. Work should be done in order to bring the change in the kinetic energy of a moving object.
The kinetic energy of a moving object can be determined from the formula mentioned below:
K.E. = ½mv² where ‘m’ and 'v' is the mass and velocity of the object.
Given, the mass of the carriage, m = 450 Kg
The speed of the carriage, u = 18 m/s
The initial kinetic energy of the cart = (1/2) × 450 × (18)²
(K.E.)₁ = 72900 J
The final speed of the cart, v = 13 m/s
The final kinetic energy of of the cart = (1/2) × 450 × (13)²
(K.E.)₂ = 38025 J
The change in the kinetic energy of the cart = (K.E.)₂ - (K.E.)₁
Change in the kinetic energy = 72900 - 38025 = 34875 J
Learn more about kinetic energy, here:
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HELP ASAP THANKS
What happens to the mass of an object when the parts are rearranged?
Answer:
The law of conservation of mass is a fundamental principle of physics. According to this law, matter can be neither created nor destroyed. In other words, the mass of an object or collection of objects never changes, no matter how the parts are rearranged.
Hope it helps!!!
Answer:
their will be no change in this..
The law of conservation of mass is a fundamental principle of physics. According to this law, matter can be neither created nor destroyed. In other words, the mass of an object or collection of objects never changes, no matter how the parts are rearranged.
The electric field at a point 23 cm from a charged particle is 102424 N/C toward the particle. What is the charge on the particle? (Take k=9x109 Nm2/C2 )
Answer:
2.62×10⁻⁶ C
Explanation:
From the question,
Electric Field (E) = kq/r²....................... Equation 1
Where q = charge on the particle, r = distance of the electric field from the charge, k = coloumb's constant.
make q the subject of the equation
q = Er²/k.............................. Equation 2
Given: E = 102424 N/C, r = 23 cm = 0.23 m, k = 9×10⁹ Nm²/C².
Substitute these values into equation 2
q = (102424×0.23)/(9×10⁹)
q = 2.62×10⁻⁶ C
Hence the charge on the particle is 2.62×10⁻⁶ C
Why is physics used to study stars?
A. Stars are interesting.
O B. Stars are circular.
O C. Stars are useful.
O D. Stars are made of matter.
Answer:
stars are made of matter
The Doppler Effect for sound occurs when:
a) the speed of the wave changes
b) the height of the wave changes
c) the distance between the waves change
d)the moving object decreases in speed
A weed eater does 21 kJ of work in 0.750 h. What power does it develop?
Answer:
[tex]p = \frac{w}{t} [/tex]
21kj÷0.750
28w
At an amusement park, you and a friend sit on a large rotating disk. You sit at the edge and have a rotational speed of 10 RPM and a linear speed is 12 m/s. Your friend does halfway to the center What is her rotational speed and linear speed
Which may result from an increase in friction?
decreased traction
increased speed
reduced wear and tear
generation of heat
Answer:
The Answer is B: to provide traction so that slipping does not occur
Explanation:
if it is wrong please correct me
10. How much total work do you do when you lift a 50 kg microwave 1.0 m off the ground and then push it 1.0 m
across a counter with a force of 50 N?
Work formula:
[tex]W = Fd\cos(\theta)[/tex]
F = 50N, d = 1.0 m
When you lift something straight up, the angle of the force is 90º
cos(90º) is 0, so there's no work done when you lift the microwave off the ground
[tex]W = (50N)(1.0)(0) = 0[/tex]
F = 50N, d = 1.0 m
When you push the microwave, the angle is 0º and cos(0º) is 1. So there is work done here:
[tex]W = (50 N)(1.0m)(1)[/tex]
[tex]W = 50[/tex]
total work = 50 joules
At which point on this graph do reactants begin to produce products as they collide?
Answer:b
Explanation:
i just did the quiz i was look for it too then got it
The point on this graph do reactants begin to produce products as they collide is B.
What is chemical reaction?The chemical reaction is the reaction between two reactants which led to the formation of products.
The products are substances which forms after reaction. The reactants are the substances which are original materials.
This graph shows how the reactants are reacted and products are formed in a chemical reaction.
As the reaction proceeds, the potential energy is higher when reactants begin to produce products.
Thus, the point on this graph do reactants begin to produce products as they collide is B.
Learn more about chemical reaction.
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hiii pls help i’ll give brainliest thank you
Answer:
friction force
Explanation:
friction forces a force that opposed the relative motion of two bodies in contact or when sliding
Why does it take a long time to start Penicillin production?
Answer:
the growth of mycelial, by which reduction in carbohydrate level occurs in the medium. Because of this reduction in carbohydrate level
Explanation:
You plan to visit a friend who lives 30 miles away. You predict that your average speed for this trip will be 50 miles per hour. How long will your trip take?
0.4 hours (24 centimeters)
0.8 hours (48 centimeters)
0.6 hours (36 minutes)
1.66 hours (~100 minutes)
Answer:
.6 hours
Explanation:
to find time you divide distance by speed
more mass an object has _____ its gravitational force. HHHHHHHHHHHHHHHHHHHHHHEEEEEEEEEEEEEEEELLLLLLLLLLPPPPPPPPPPP
I think the word would be increases. I don't know what the options are though.
When heat is added to ice, the first change it goes through will be which of the following?
It will begin to boil.
It will melt into a liquid.
It will turn into steam.
It will become a vapor.
Answer:
it will begin to melt into a liquid
Explanation:the ice will melt first before turning into a liquid.
100 POINTS!!!
Which condition is NOT necessary for a hurricane to form?
warm ocean waters
very low air pressure
high air pressure
warm, moist air rising
Answer:
very low air pressure and that's not 100 points
Which of the following is considered to be a fine motor skill?
Jumping rope
Drawing
Running
Riding bicycle
PLZZZ HELP ME ASAP FOR BRAINLIEST AND 20 POINTS
I am desperate and these are my last points.
:'(
Answer:
gamma rays
Explanation:
What are the two types of motion an object can experience when acted upon by balanced forces?
Answer:
according to newton's first law of motion, when balanced forces are applied to an object:
an object at rest stays at rest an object in motion continues its motion with a constant speedThe two types of motion an object can experience when acted upon by balanced forces are translational and rotational motion.
According to Newton's first law of motion which states that "a body will continue in its state of rest unless acted upon by an external force".
When a body at rest is acted upon by an external force, the body begins to move (it experienced motion). The body that experiences these balanced forces can wither move in a straight line (Translational motion) or in a circular manner (Rotational motion)
Hence the two types of motion an object can experience when acted upon by balanced forces are translational and rotational motion.
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The gravitational force between two bodies is 250N . What will the new force be if one of the masses is tripled?
If one of the masses is tripled, then their product is tripled, and the force between them is tripled. The new force is 750N .
Chan released a stone from a cliff of 10m height.
a)Determine the time taken for the stone to reach the bottom of the cliff.
b)Determine the velocity of the stone just before it touches the ground ignore air resistance.(g＝9.81ms-2)
Thanks
Answer:
a) time taken = 1.427 s
b) final speed before hitting the ground = 14 m/s
Explanation:
height of cliff = 10 m
acceleration due to gravity = 9.81 [tex]m/s^{2}[/tex]
time taken for stone to reach bottom of cliff = ?
velocity of stone just before hitting the ground = ?
To find the time taken, we will use Newton's equation of motion
using
[tex]v^{2} = u^{2} + 2as[/tex]
where
v = final speed of stone before hitting the ground
u = initial speed of the stone (u = 0 since the stone started falling from rest)
a = acceleration due to gravity = 9.81 [tex]m/s^{2}[/tex]
s = height of the cliff = 10 m
Solving, we have
[tex]v^{2} = 0^{2} + 2(9.81 * 10)[/tex]
[tex]v^{2} = 2*98.1[/tex]
[tex]v^{2} = 196.2[/tex]
[tex]v=\sqrt{196.2} = 14 m/s[/tex]
From the first equation of motion,
[tex]v = u + at[/tex]
where t = time taken for stone to reach bottom of cliff
imputing values, we have
[tex]14 = 0 + (9.81 * t)[/tex]
[tex]t = \frac{14}{9.81} = 1.427 s[/tex]