Answer:
500 Newtons
Explanation:
50 kg x 10 m/s squared
A car has a mass of 1,000 kg and accelerates at 2 m/s? What is the magnitude of the force acting on the car?
0500 N
O 500 kg
0 2,000 N
2.000 kg
Can someone give me ideas to improve hearing aids in medical sector to help deaf people
Answer:
yeah sure they should have a guaranty and should be water proof
Segment D - E : The bus is speed_____ It is gradually increasing it's
A slowing down
B speeding up
C constant speed
D at rest
Plss help
A 14-gauge copper wire of diameter 1.628 mm carries a current of 12.5 What is the potential difference across a 2.00 - m length of the wire? *p=1.47x10^-8
Answer:
[tex]V=1.76\times 10^{-4}\ V[/tex]
Explanation:
Given that,
The diameter of a wire, d = 1.628 mm
Radius, r = 0.814 mm = 0.000814m
Current, I = 12.5 mA
The length of the wire, l = 2m
The resistivity of the wire, [tex]\rho=1.47\times 10^{-8}\ \Omega-m[/tex]
We need to find the potential difference across the wire. We know that the resistance of the wire is given by :
[tex]R=\rho\dfrac{l}{A}[/tex]
Also, V = IR
[tex]\dfrac{V}{I}=\rho\dfrac{l}{A}\\\\V=\dfrac{\rho l I}{A}\\\\V=\dfrac{1.47\times 10^{-8}\times 2\times 12.5\times 10^{-3}}{\pi \times (0.000814)^2}\\\\V=1.76\times 10^{-4}\ V[/tex]
So, the potential difference of the wire is [tex]1.76\times 10^{-4}\ V[/tex].
Which of the following statements is false?
Dissolving salt into water is an example of a mixture.
The mass of one piece of paper is the same even after it is ripped in half and the 2 pieces are measured again.
Increasing the temperature of water to a boil is a physical change.
The formation of a precipitate is the only way to see if a chemical change has occurred.
Write a short paragraph that explains how a sport using a ball would be played differently on a planet of your choice. For example, how would gravity affect a basketball game on Saturn? Or how would gravity affect a baseball game on Mercury?
(Doesnt have to be a full paragraph answer I just need a gist of what it is)
on a different planet I would play a sport similar to soccer. The main difference is that there is zero gravity. To win the game u have to get the ball into the other person's net first.
Explanation:
I was just bored
The acceleration of the object may be zero and the velocity of the object may not be equal to zero
Sure. That's true when ANY object is moving in a straight line at a steady speed.
An archer defending a castle is on an 15.5 m high wall. He shoots an arrow straight down at 22.8 m/s. How much time does it take to reach the ground? (Unit = s) Watch your minus signs!
Answer:
about 602 milliseconds
Explanation:
The motion can be approximated by the equation ...
y = -4.9t^2 -22.8t +15.5
where t is the time since the arrow was released, and y is the distance above the ground.
When y=0, the arrow has hit the ground.
Using the quadratic formula, we find ...
t = (-(-22.8) ± √((-22.8)^2 -4(-4.9)(15.5)))/(2(-4.9))
= (22.8 ± √823.64)/(-9.8)
The positive solution is ...
t ≈ 0.60195193
It takes about 602 milliseconds for the arrow to reach the ground.
Is the potential energy on the surface of Earth zero?If not,what will be it's value?
Answer:
Potential energy does not have an absolute measurement. It is always relative to some reference point. Gravitational potential always increases when you go up and decreases when you go down. But the choice of a zero point is arbitrary.
If you’re dropping objects onto the ground, then choosing the ground as a zero point makes the calculations easier. But you could just as easily make the zero point the top of Mt. Everest, and all the answers would turn out the same. Up still means more energy and down means less, but now the PE of an object at sea level would have a negative sign, but not as negative as an object ten meters above sea level.
So everything would still work fine.
In fact, planetary astronomers take this idea to extremes. Instead of the top of Mt. Everest, they set the zero point for potential energy as infinitely high—so far “up” that gravity is so weak that going “up” another kilometer doesn’t gain you any energy. Then the value for potential energy everywhere else in the universe anywhere near a planet has a negative sign, but just as before, all the answers in relative terms turn out fine.
Explanation:
PLEASE MARK ME AS BRAINLIEST
2. What kinds of statistics are used in sports? In a paragraph explain your answer with examples
from different sports.
Answer: Sports Illustrated noted that analytics in a sport such as a football is widely used to manage injury prevention. Basketball coaches make use of statistics such as field-goal attempts, effective field goal percentage, free throw attempts, and free throw percentages.
Explanation: BRAINLEST?
What is the half-life of isotope X?
How many radioactive atoms of isotope X are left after
3 half-lives?
How many half-lives must have occurred if only 7
atoms of isotope X are left?
Answer:
What is the half-life of isotope X? 25 seconds
How many radioactive atoms of isotope X are left after 3 half-lives? 13
How many half-lives must have occurred if only 7 atoms of isotope X are left? 4
Explanation:
The half-life of isotope X is 25 seconds
The radioactive atoms of isotope X left after 3 half-lives are 13
Number of half-lives must have occurred if only 7 atoms of isotope X left are 4.
What is half life?Half life is the time taken by a radioactive material for the radioactivity of to reduce by half its original value.
The half life equation is:
A = A₀ (½)^(t / T)
where A is the final amount, A₀ is the initial amount, t is the amount of time, and T is the half life.
The half-life of isotope X is 25 seconds
The radioactive atoms of isotope X left after 3 half-lives are 13
Number of half-lives must have occurred if only 7 atoms of isotope X left are 4.
Thus, the questions are answered.
Learn more about half life.
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4. A cinder block is sitting on a platform 20 m high. It has a mass of 4 kg. The block has energy. Calculate it.
784 J
3136 J
847
80 J
Answer:
Explanation:
Since the block is at rest in an elevated position, we can assume that it only has potential energy.
U=mgh is the formula for potential energy where U=potential energy, m= mass, g=acceleration due to gravity, and h=height.
Plug in known variables....
U=4kg*9.8m/s^2*20m
U=784 joules of potential energy or letter A.
Describe the movement of the Moon.
Someone please help with this one and the other I posted, I have two hours till it’s due :(
Answer:
The Moon spins in space in a movement called rotation. Oddly enough, it also takes the Moon about 27 days to spin around once (which is much slower than Earth's rotation, which only takes 24 hours). That means the Moon goes all the way around Earth in the same amount of time it takes to spin around just once!
The resistance of 3A and 12V
If the sun were to burn out, it would take humans just over 8 minutes to realize because light from the sun takes just over 8
minutes to reach earth. Tommy was 3 years old when his dad showed him a particular star that was estimated to be 18 light years
away from earth. If the star burned out immediately after Tommy was showed it, how old would Tommy be before he realized the
star was gone?
A)
21 years old
B)
18 years old
9 years old
D)
6 years old
the answer is (a. 21
Answer:the answer it’s A) I just took the test on USATestPrep
Explanation:
What is the density of an object that has a mass of 54g and a volume of 9 mL
Answer:
idc
Explanation:
idc
what allows electrons to move through it easily
Answer:
materials that allow many electrons to flow freely are caused conductors such as copper, silver, aluminum, hydrochloric solution, sulfuric acid, and salt water. in contrast materials which allow few electrons to flow are called insulators such as plastic, rubber, glass, and dried paper.
Explanation:
Hope this helped Mark BRAINLEST!!
which of the following correctly describes the hierarchy of genetic material within a cell
Answer: D- Each chromosome in a cell is made up of two chromatids, which are each made up of molecules of DNA
Explanation:
A macromolecule is a large molecule that is made of many smaller units. Chromosomes are macromolecules that contain all of the genetic information in a cell. Chromosomes are each made of two smaller units called chromatids. Chromatids are each made up of molecules of DNA. Therefore, the correct description of the hierarchy of genetic material in a cell is that each chromosome in a cell is made up of two chromatids, which are each made up of molecules of DNA. The structures become more and more microscopic as one moves down the hierarchy.
I can't understand
like which energy changes are involved
which energy it was first and which it was converted into
Answer:
turtle
Explanation:
As an astronaut travel far away from earth her weight
Explanation:
As an astronaut travel far away from the earth her weight Decreases because weight depends upon the acceleration due to gravity and in space there is no gravity.
What happens to the particles of an object when its temperature increases? *
The PE of the particles decreases.
The KE of the particles decreases.
The PE of the particles increases.
The KE of the particles increases.
Answer:KE
Explanation:
Please answer quick! Thanks guys!
Answer:
wire By please mark my answer in brain list
Answer:
Remove wire G, if the wire after it is F. Remove wire A as C is connecting to it already.
what does it mean for a disease to be X linked?
Answer:
X-linked is a trait where a gene is located on the X chromosome. Humans and other mammals have two sex chromosomes, the X and the Y. In an X-linked or sex linked disease, it is usually males that are affected because they have a single copy of the X chromosome that carries the mutation.
1.Galileo conducted experiments from the top of the Leaning Tower of Pisa. If he dropped a piece of burlap tied into a ball with twine and a 2-pound rock at the same time, what would he have seen and why? (5 points)
Answer:
The time for both of the balls to reach the ground would be the same.
Explanation:
If no air resistance is present, the rate of descent depends only on how far the object has fallen, no matter how heavy the object is. This means that two objects will reach the ground at the same time if they are dropped simultaneously from the same height. ... In air, a feather and a ball do not fall at the same rate.
What statement below is true about Mercury?
A)
On Mercury you weigh only 70% of what you weigh on Earth
B)
On Mercury you weigh only 38% of what you weigh on Earth
On Mercury you weigh only 90% of what you weigh on Earth
D)
On Mercury you weigh only 10% of what you weigh on Earth
Answer: It is B 38% have a good day :DDD
Calculate by how much a spring with spring constant 1.2N/m has been squashed when it has stored 76J,
Answer:
11.25 m
Explanation:
From the question given above, the following data were obtained:
Spring constant (K) = 1.2 N/m
Energy (E) = 76 J
Compression (e) =?
Energy stored in a spring is given by the following equation:
E = ½Ke²
Where:
E => Energy stored in the spring.
K => spring constant
e => Extention or compression
With the above formula, we can obtain how much the spring has been squashed as follow:
Spring constant (K) = 1.2 N/m
Energy (E) = 76 J
Compression (e) =?
E = ½Ke²
76 = ½ × 1.2 × e²
76 = 0.6 × e²
Divide both side by 0.6
e² = 76 / 0.6
Take the square root of both side.
e = √(76 / 0.6)
e = 11.25 m
Thus, the spring has been squashed by 11.25 m
How many degrees are there between the direction of motion and the force of friction?
A. O
B. 270
C. 90
D. 180
The correct option is (d).
Angle should be 180° between the direction of force and the direction of motion of a body as work done is equal to force multiplied by displacement multiplied by cosx.
Friction is a force that opposes motion. When two objects are in contact, friction is acts in a direction opposite to the motion of the object.A force known as friction prevents relative motion between surfaces that are in touch. One of the more basic features of friction is that it always runs parallel to the surfaces with which it makes contact and opposes any motion or attempted motion of the systems with respect to one another.What is the direction of friction force?When a force is applied to stop it from moving, frictional force provides resistance. As a result, it always moves in the opposite direction of an item in motion. Friction acts on the right when force is applied to the left.Learn more about direction of friction force brainly.com/question/24322020
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Kinetic energy increases as:
A. Mass increases and velocity decreases.
B. Mass decreases and velocity increases.
C. Both mass and velocity increase.
D. Both mass and velocity decrease.
Kinetic energy formula is: 1/2 mv^2
M = mass
V = Velocity
So as kinetic energy increases, mass increases and velocity increases because mass and velocity are directly proportional to each other.
Rain and wind place which type of load on structures?
A) Dynamic load
B) Soft load
C) Gradual load
D) Static load
PLEASE HELPPPPP!!!!!!!!!