Diamonds have a score of 10 on the Mohs scale. Therefore, they are used in grinding belts to buff and smooth other materials. What physical property is demonstrated by this? brainly
Answer:
Hardness
Explanation:
It has a score of 10 on the Mohs scale of HARDNESS
Find kinetic energy if that same mass is now moving at a velocity of 3 m/s
Answer:
what is the mass???
Explanation:
just take the mass(kg) and half it
then take the halved mass and multiply it by 3 m/s
Earth, has a bigger mass than the Moon .
if you'll be able to go to the moon,
what happens to your weight?
An airplane flying due north at 90km/h is being blown due west at 50 km/h. What is the magnitude of the resultant velocity of the plane?
Answer: 103 km/hr
Explanation:
Guessed on ck-12 and it ended up being right.
Answer:
50
Explanation:
He/she guessed...Ig its 50.
Noah Formula is in airplane which is flying at constant speed in a circular course of radius 5000 m., circling O'Hare Airport prior to landing. Noah observes that the plane completes each round trip in 400 seconds. What is the speed of the airplane? What is centripetal acceleration?
Answer:
(a). The speed of the airplane is 78.53 m/s.
(b). The centripetal acceleration 1.234 m/s².
Explanation:
Given that,
Radius = 5000 m
Time = 400 second
We need to calculate the speed of the airplane
Using formula of speed
[tex]v=\dfrac{d}{t}[/tex]
[tex]v= \dfrac{2\pi r}{t}[/tex]
Put the value into the formula
[tex]v=\dfrac{2\times\pi\times5000}{400}[/tex]
[tex]v=78.53\ m/s[/tex]
We need to calculate the centripetal acceleration
Using formula formula
[tex]a=\dfrac{v^2}{r}[/tex]
Put the value into the formula
[tex]a=\dfrac{78.53^2}{5000}[/tex]
[tex]a=1.234\ m/s^2[/tex]
Hence, (a). The speed of the airplane is 78.53 m/s.
(b). The centripetal acceleration 1.234 m/s².
A box is suspended from a crane at a height of 32 m from the ground. The box has 7840 j of gravitational potential energy. What is the mass of the box
Answer:
The mass of the box is 24.97 [kg]
Explanation:
In order to solve this problem, we must use the concept of potential energy, which is defined as the product of mass by gravity by height. So we have the following equation.
[tex]E_{p} =m*g*h[/tex]
where:
Ep = potential energy [J]
m = mass [kg]
g = gravity acceleration = 9.81 [m/s^2]
h = elevation = 32 [m]
7840 = m*9.81*32
m = 24.97 [kg]
How can a person’s movement away and towards a reference point be analyzed using a position-time graph?
Answer:
Explanation:
You can plot their change in position per unit of time. By taking the slope of this graph, you can figure out the velocity at any point
what is statement can most likey be useing in the shock waves of atmoic bomb
Answer:
The initial energy emission occurs by 80% or more in the form of gamma rays but these are quickly absorbed and dispersed mostly by air in little more than a microsecond, converting gamma radiation into thermal radiation (thermal pulse ) and kinetic energy (shock wave) which are actually the two dominant effects in the initial moments of the explosion. The rest of the energy is released in the form of delayed radiation (fallout or fallout) and is not always counted when measuring the performance of the explosion.
Explanation:
High altitude explosions produce greater damage and extreme radiation flux due to lower air density (photons encounter less opposition) and consequently a higher blast wave is generated.
Have you ever wondered how a vending machine "knows" that you have put in the correct amount of change to purchase a snack or a drink? These machines use coin detectors that determine the mass and the size of the coins deposited. In other words, they analyze the density of the coins. United States coinage is minted within very narrow specifications, so the density of each type of coin is always the same. The coin detectors compare the coins inserted to the preset standards to determine if the correct combination of coins has been deposited. In this lesson, you too will determine the density of various coins. OBJECTIVES Recognize the characteristics of density. Design and carry out a scientific investigation. Present your findings in a scientific report. Online Lab This animation will allow you to find the density of a penny, a nickel, and a quarter. Make a hypothesis in which you suggest which coin will have the highest density and which will have the lowest density. A model hypothesis might be: "If the (fill in the name of a coin) has a greater density than the _____ and _____, then it will have a greater mass to volume ratio. If the (fill in the name of a coin) has a lower density than the _____ and _____, then it will have a lower mass to volume ratio. Remember to record your data and observations in the data sheet so that you can use them to present your findings. SHOW TRANSCRIPT Present Your Findings Write a one or two summary paragraph discussing this experiment and the results. Use the following questions and topics to help guide the content of your paragraph. According to your data, was your hypothesis correct? (Be sure to refer to your data when answering this question.) Summarize any difficulties or problems you had in performing the experiment that might have affected the results. Describe how you might change the procedure to avoid these problems. List at least two real world examples that apply the findings of this experiment. (Hint: An example of this type was given in the introduction to this project.) What would you like to do next?
Answer:
If the Quarter has a greater density than the nickel and penny, then it will have a greater mass to volume ratio.
Explanation:
sorry thats all i can help with!
A cyclist accelerates from a set of traffic lights.
The driving force of the back tyre on the ground is 250 N.
(a)
How much work is done by this force when the cyclist travels 5 metres?
never mind i got it
How is mercury obtained and separated from other nearby substances?
Use this graph to answer.
Calculate the turtle’s velocity during the following time intervals: 0-2
Answer:
10 m/s
Explanation:
Find the displacement.
xf - xi = d
0 - (-10) = 10 m
Find the acceleration.
d = 1/2at^2
10 = 1/2a(2)^2
10 = 1/2a(4)
10 = 2a
a = 5 m/s^2
Find the velocity.
v = at
v = 5(2)
v = 10 m/s
DESPERATE WILL GIVE BRAINLIST
How long does it usually take for a rock to undergo a stage within the rock cycle?
A. a few days
B. from 300 to 400 years
C. about one thousand years
D. thousands to millions of years
Answer: D. thousands to millions of years
Explanation: Stages within a rock's cycle cannot happen quickly. The formation and deterioration can take thousands to millions of years to occur.
I hope this helps!
Good luck <3
Find the mass of an object on earth that weighs 39 N?
Answer:
3.9kg
Explanation:
From newton's second law of motion
F =ma
a = 10m/s^2
F=39N
a= F/m
a= 39/10
a= 3.9m/s^2
sonia has three different sized blocks of copper . she made observations and mesaurements of each block. which of her measurements would be different ?
Answer:
This question lacks options, the options are:
A.The density of each block.
B.The electrical conductivity of each block.
C.The melting point of each block.
D.The volume of each block
The answer is D. Volume of each block
Explanation:
According to this question, Sonia has three blocks of different sizes. She then made observations and measurements of each block. The physical property of a substance that depends on the size of that substance is called EXTENSIVE PROPERTIES. This include mass, height, volume, length etc.
In this case, the different measurement Sonia will record on each copper block will be the VOLUME OF EACH BLOCK. This is because the volume depends on the size of the block (extensive), hence, will have different volume measurements.
what is the weight of a 500 kg boulder on the moon?
Answer:
F = 810 [N]
Explanation:
To solve this problem we must use the acceleration of gravity of the moon, which according to information provided by the internet we can see that the gravitational acceleration corresponds to 1.62 [m/s^2].
The weight of a body corresponds to the product of mass by gravity, so with the following equation we can find the weight.
F =m*g
F = 500 * 1.62
F = 810 [N]
In recent years, assistive technologies have been developed to give people with disabilities equal access to resources. Apex
Answer:
as businesses became aware of the demand for equal access, they began t invest in research and development to meet the desires of their costumers.
Explanation:
just took the test, still failing :D
How does the approximate number of atoms
in the air in your lungs compare to the num-
ber of breaths of air in the atmosphere of the
whole world?
I don’t understand what this is asking...
A rock falls from rest off a high cliff. How far has the rock fallen when its speed is 39.2 meters per second?
( plss I need help lol)
The rock fell as far as 78.4 meters.
Given the following data:
Initial speed = 0 m/s (since the rock fell from rest). Final speed = 39.2 m/sWe know that the acceleration due to gravity (a) for an object is equal to 9.8 meter per seconds square.
To find how far (distance) has the rock fallen, we would use the third equation of motion;
[tex]V^2 = U^2 + 2aS[/tex]
Where:
V is the final speed. U is the initial speed. a is the acceleration. S is the distance covered.Substituting the given parameters into the formula, we have;
[tex]39.2^2 = 0^2 + 2(9.8)S\\\\1536.64 = 0 + 19.6S\\\\19.6S = 1536.64\\\\S = \frac{1536.64}{19.6}[/tex]
Distance, S = 78.4 meters.
Therefore, the rock fell as far as 78.4 meters.
Read more: https://brainly.com/question/8898885
You have a bowling ball with a mass of 4kg. You throw it with an acceleration of 10 m/s/s. With how much force will it hit the pins?
Answer:
The answer is 40 NExplanation:
The force acting on an object can be found by using the formula
force = mass × accelerationFrom the question
mass = 4 kg
acceleration = 10 m/s²
So we have
force = 4 × 10
We have the final answer as
40 NHope this helps you
A doctor pushes the plunger of syringe down and then pulls it up to a draw liquid into a syringe? give reason please help me with very short answer
Answer:
When the doctor has the syringe, it is full of air. So, now after the doctor pushes the plunger, hence the air gets released into the medicine container. After this the doctor then takes the plunger and pull it back. Now , the air gets pulled up back into the syringe, but not only does the air come in but also the medicine because of the pressure build up.
If my answer helped, please mark me as the brainliest!!
Thank You!
what difference will you get from the flying or air filled balloon and the hydrogen filled balloon.
Answer:Since most of air is made of nitrogen and oxygen, which have heavier molecular weights than hydrogen, air is denser than the hydrogen-filled balloon (the atmosphere is denser than the hydrogen-filled balloon). This results in the balloon floating in the air!
Explanation:
Neglecting air resistance, if you throw a ball straight up with a speed of 20 m/s how fast will it be moving when you catch it
What speed should a spaceship of mass 5.21 x 107kg moving around a planet
only by the gravitational force be, if the distance between them is 6.27 x 108 m
and the mass of the planet is 4.76 x 1026 kg? Estimate G as 6.67 * 10-11 N (m/kg)
A. 7.12 x 103 m/s
B. 6.23 x 103 m/s
С. 4.25 x 103 m/s
D. 7.43 105 m/s
E. 7.25 x 103 m/s
Answer: A
Explanation:
The speed of the spaceship moving around a planet only by the gravitational force is 7.12 × 10³ m/s.
What is centrifugal force?A fictitious force that moves in a circle and is directed away from the center of the circle is called centrifugal force. When measurements are taken in an inertial frame of reference, the force does not exist. It only becomes relevant when we switch from a ground/inertial reference frame to a rotating reference frame.
The centrifugal force's unit is newton.
As the gravitational force is balanced by centrifugal force is orbital motion:
Gravitational force =centrifugal force
GMm/r² = mv²/r
v² = GM/r
v = √( GM/r)
= √(6.67×10⁻¹¹ ×4.76 ×10²⁶/6.27 ×10⁸)
= 7.12 × 10³ m/s.
Hence, The speed of the spaceship is 7.12 × 10³ m/s. Hence, option (A) is correct.
Learn more about centrifugal force here:
https://brainly.com/question/17167298
#SPJ2
Need help with this ! ————————————
Explanation:
i think the answer is displacement
A thin plastic rod of length 2.5 m is rubbed all over with wool, and acquires a charge of 75 nC, distributed uniformly over its surface. Calculate the magnitude of the electric field due to the rod at a location 7 cm from the midpoint of the rod. Do the calculation two ways, first using the exact formula for a rod of any length, and second using the approximate formula for a long rod.
Answer:
find out the le
Explanation:
Why do the positive charges in the sugar grain not move?
1. Because protons are "stuck" in the nucleus, so they don't move between atoms in a material
2.
Because they are attracted by the negative tupperware
3. Because they are repelled by the negative tupperware
4.
Because the positive charges feel no attractive force from the tupperware
Which type of investigation is lised to compare two subiects?
Comparative
Experimental
Descriptive
What part of the life cycle is our Sun in?
what are duplet and octet elements??