PLEASR HELP ME, WILL GIVE BRAINLIEST

a sportsman rushed the circle 15 times in 1/6 hour. distance of this running track 0.4 km. what is the average speed of sportsman?

a) 20 m/s
b) 50 m/s
c) 35 m/s
d) 10 m/s
e) 25 m/s
f) 20.5 m/s

(an answer with explanation would be great)​

Answers

Answer 1

Answer:

d. 10 m/s

Explanation:

PLEASR HELP ME, WILL GIVE BRAINLIEST A Sportsman Rushed The Circle 15 Times In 1/6 Hour. Distance Of
Answer 2
D 10 m/s.




Bc 20 won’t work or 35

Related Questions

1 point
Which will hit the ground first, if both objects are dropped from the same
height at the same time IN AIR?*
O an icicle
O a snow flake
O both hit the ground at the same time

Answers

Answer:

an icicle

Explanation:

and icicle has less air resistance compared to that of a snow flake

A student kicks a ball of 1 kg with a velocity of 13ms. The contact is 0.2 sec. Find the force

Answers

Answer:

65 N

Explanation:

Assuming that the ball was at rest hence initial momentum = 0

Final momentum = mv = 1Kg × 13 ms-1 = 13 kgms-1

But

Ft= mv according to Newton's law

F= mv/t

F= 13kgms-1/0.2s

F= 65 N

Answer:

65 N

Explanation:

Given that :

Mass of ball = 1kg

Velocity = 13m/s

Time = 2 seconds

Using the relation :

Force = (mass * change in velocity) / time

The change in momentum of the ball :

Momentum = mass * change in velocity

Velocity change = (13 - 0) ; Given that initial velocity = 0 (at rest)

Momentum = 1kg * 13m/s

Momentum = 13 kgm/s

Therefore, the force, F equals;

F = change in momentum / time

F = 13kgm/s ÷ 0.2 s

Hence, Force, F = 65N

what is the correct answer?

Answers

Answer:

Option (4)

Explanation:

Given polynomial is,

P(x) = 1x³ - 7x² + 2x + 40

If (x - 5) is a factor of the given polynomial,

Synthetic division by x = 5,

5 |  1    -7     2     40

    ↓    5   -10   -40

     1    -2    -8      0

Therefore, factored form of the polynomial will be,

P(x) = (x - 5)(x²- 2x - 8)

Now we further factorize the expression (x² - 2x - 8),

(x² - 2x - 8) = x²- 4x + 2x - 8

                  = x(x - 4) + 2(x - 4)

                  = (x + 2)(x - 4)

Now fully factored form of the polynomial will be,

P(x) = (x - 5)(x + 2)(x - 4)

Therefore, remaining factors of the polynomial other than (x - 5) are (x - 4)(x + 2)

Option (4) will be the correct option.

role play pokimon only

Answers

Answer:

huh

Explanation:

im so confused

Answer:

eevee

Explanation:

A metal has 4000kg in the volume of 2m3. what is its density​

Answers

Answer:

2000 kg/m³

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

From the question we have

[tex]density = \frac{4000}{2} = 2000 \\ [/tex]

We have the final answer as

2000 kg/m³

Hope this helps you

If an object has a weight of 4050 N near the surface of the Earth, what is its mass?

Answers

Answer:

417.5 kg

Explanation:

Since the gravitational for of attraction F, equals the weight of the object W when its close to the earth, F = GMm/R² = W = mg where m = mass of object and g = acceleration due to gravity close to the earth = 9.8 m/s².

g = GM/R² where  g = acceleration due to gravity close to the earth, G = universal gravitational constant = 6.67 × 10⁻¹¹ Nm²/kg², M = mass of earth = 5.927 × 10²⁴ kg and R = radius of earth = 6.4 × 10⁶ m

So, g = GM/R²

= 6.67 × 10⁻¹¹ Nm²/kg² × 5.927 × 10²⁴ kg/(6.4 × 10⁶ m)²

= 39.53 × 10¹³ Nm²/kg ÷ 40.96 × 10¹² m²

= 9.65 N/kg

≅ 9.7 N/kg

= 9.7 m/s²

Since W = 4050 N and W = mg

m = W/g = 4050 N/9.7 m/s²

= 417.53 kg

≅ 417.5 kg

So, the mass of the object is 417.5 kg

Falling Faster
Imagine that you are standing on the observation deck of the Empire
State Building. You drop a hammer and a feather at the same time
over the edge of the building.
1. Will the hammer or the feather reach the ground first? Explain.
per anstre here
2. Why do the hammer and the feather fall to the ground?

Answers

In a vacuum they would fall at the same speed, but since it is only off the empire State building, the hammer would fall first

Gravity

Use the drop-down menus to determine which state of matter is described in each statement.



The atoms in a
are closely packed, but able to slide past each other.

The atoms in a
spread as far apart as possible.

A
has a definite shape and volume.

The shape of a
can change, but the volume is definite.

Answers

Answer:

Explanation:

There are three states of matter; solid, liquid and gaseous states.

The solid state of matter has it's particles tightly packed with very restricted  or no movement within the molecule hence the reason for it's definite shape.

The liquid state of matter has it's particles with a free movement (better than solid but not as free as gases) within the molecule hence it's particles are loosely packed within the molecule. Hence, they (liquids) assume the shape of the container in which they are stored and they move freely when released from the container.

The gaseous state of matter has it's particles totally loosely packed as a result of it's particles moving freely and colliding against one another.

Thus, we can use the above descriptions to answer the statements from the question.

1) The atoms in a  ----- are closely packed, but able to slide past each other. Answer: From the description above, it can be deduced that the atoms here are in a solid because the particles within a solid are closely packed.

2) The atoms in a  -------- spread as far apart as possible.

Answer: The atoms here are in gaseous form because, as described earlier, they are loosely packed and  can thus be as far apart as possible.

3) A  ----- has a definite shape and volume.

Answer: As described earlier, a solid substance would have a definite shape and volume because it's particles are tightly packed.

4) The shape of a  ----- can change, but the volume is definite.

Answer: The substance here is a liquid because the particles are free (but not as free as gases) and would have a definite volume but will assume the shape of the any container they are placed in (hence they have an irregular shape).

Answer:

The atoms in a

✔ liquid

are closely packed, but able to slide past each other.

The atoms in a

✔ gas

spread as far apart as possible.

A

✔ solid

has a definite shape and volume.

The shape of a

✔ liquid

can change, but the volume is definite.

Explanation:

I REALLY NEED HELP ON PHYSICS!!!
10 POINTS

Answers

Answer:

25.021 sec

Explanation:

v=d/t

-2.33= - 58.3/t

t= - 58.3/-2.33

t=25.021 sec

Which of the following substances can be separated into several elements?
A. nitrogen B. zinc
C. air D. aluminum

Answers

Answer: C

Explanation: Air

Hope this helps! Brainlist Plz?

The following substances can be separated into several elements is the air because consisting of a mixture of several gases, such as nitrogen, oxygen, carbon dioxide and noble gases.

What is air composed of?

Atmospheric air is made up of a mixture of several gases, such as nitrogen, oxygen, carbon dioxide and noble gases. Oxygen and nitrogen are the most abundant gases, with the other gases being found in smaller amounts.

So the only element that we can separate into is air, because when performing the separation we find oxygen, nitrogen, carbon dioxide and noble gases.

See more about air at brainly.com/question/19368011

#SPJ2

How does a decrease in thermal energy affect the temperature of each state of matter?

Answers

When energy is removed, the opposite happens, decreasing the substance's temperature and turning it from liquid to solid (freezing), gas to solid (deposition), or from gas to liquid (condensation). When the pressure exerted on a substance increases, it can cause the substance to condense.

help!! i need to know which letter has the highest speed, the middlest speed and the lowest speed!!

Answers

Answer:

From highest speed to lowest speed:

A, C, B

Explanation:

On a position time graph, the slope of a line would represent the velocity, since the rate of change represents how many meters traveled in the given time.

The larger the slope, the faster the velocity; the steeper the line, the faster the speed.

Since line B is negative, you know that velocity is negative so it automatically has the lowest speed.

Out of lines A and C, since A is steeper, you know that A has a faster speed.

In conclusion:

A is the fastest

C is the middle

B is the slowest

Hello, please help!
Is methane an element, compound, or mixture?
Is Carbon Dioxde an element, compound, or mixture?

Answers

Answer:

I think carbon dioxide is a mixuture and Methane is a compound

Explanation:

carbon dioxide is a mixup use and methane is a compound ...?

The vertical (top to bottom) parts of periodic table are called groups or

Answers

or families because of there similar chemical behavior

please answer it fast and correctly​

Answers

Answer:

(1) chess is played by him

(2) The great black engine was seen by her

(3) Arrangements for functions had been made by him

(4) A meeting is being attended by Raman

= when the last of the guests left, I went back into the hall to look for my mobile phone that I had kept on the table, I found that my mobile phone was not there. I felt freaked and I asked to every member of my family about my phone, but nobody had idea about that. then there was a phone call made by my uncle to my father, that his son had taken the mobile by mistake. After sometime, My uncle came to return my mobile. Then I took a sigh of relief .

please mark me as a brainelist

What is 3,278,000 as scientific notation?

Answers

3.278*10^6 I think. Sorry if it’s wrong.

what type of process occurs at constant pressure

Answers

Answer:

isobaric process

Explanation:

An isobaric process occurs at constant pressure. Since the pressure is constant, the force exerted is constant and the work done is given as PΔV.

Answer:

well for me I think it's

Explanation:

Charles law in gas laws

1.
Asthenosphere
a. the liquid layer located between the mantle and the inner
core
2.
Continental crust
b. the inner most solid layer of Earth
3.
Convection currents
the parts of Earth's crust located beneath the ocean that
make up the seafloor
4.
Crust
5.
Density
d. a transition zone beneath the lithosphere that is semi-
fluid, sometimes referred to as the plastic layer
6.
Inner core
e. the hard, rigid outermost layer of Earth
7
Lithosphere
f. all the parts of the Earth's crust that are not beneath the
ocean
8
Mantle
9.
Mesosphere
g the layer that is directly below Earth's crust and is divided
into 3 parts: lithosphere, asthenosphere, and mesosphere
h. the amount of force on a substance
10.
Oceanic crust
1. the solid lower layer of the mantle
11.
Outer core
j. the rigid, solid upper mantle connected to Earth's crust
12
Pressure
ki instrument used to measure earthquake waves
13.
Seismograph
1. the layer of Earth that is split into larger pieces: it floats on
the asthenosphere and moves due to convection currents
14.
Tectonic plates
m. the measure of mass per volume; the number of particles
in a given space
in movement of liquid and gaseous matter in a circular
motion caused by a difference in temperature; warm rises
and cool sinks, causing a circular current

Answers

Answer:

dsfghrtykuyjfcjuktj,ilyk

Explanation:

jgbnm,g bcm

A 4000-kg car bumps into a stationary 6000kg truck. The Velocity of the car before the collision was +4m/s and -1m/s after the collision. What is the velocity of the truck?

Answers

Answer:

The velocity of the truck is 3.33 m/s

Explanation:

Law Of Conservation Of Linear Momentum

The total momentum of a system of bodies is conserved unless an external force is applied to it. The formula for the momentum of a body with mass m and velocity v is  

P=mv.  

If we have a system of bodies, then the total momentum is the sum of the individual momentums:

[tex]P=m_1v_1+m_2v_2+...+m_nv_n[/tex]

If some collision occurs, the velocities change to v' and the final momentum is:

[tex]P'=m_1v'_1+m_2v'_2+...+m_nv'_n[/tex]

In a system of two masses:

[tex]m_1v_1+m_2v_2=m_1v'_1+m_2v'_2[/tex]

There are two objects: The m1=4000 Kg car and the m2=6000 Kg truck. The car was moving initially at v1=4 m/s and the truck was at rest v2=0. After the collision, the car moves at v1'=-1 m/s. We need to find the velocity of the truck v2'. Solving for v2':

[tex]\displaystyle v'_2=\frac{m_1v_1+m_2v_2-m_1v'_1}{m_2}[/tex]

Substituting:

[tex]\displaystyle v'_2=\frac{4000*4+6000*0-4000(-1)}{6000}[/tex]

[tex]\displaystyle v'_2=\frac{16000+4000}{6000}[/tex]

[tex]\displaystyle v'_2=3.33[/tex]

The velocity of the truck is 3.33 m/s

A 2.0 kg block is released from rest at the top of a curved incline in the shape of a quarter of a circle of radius R = 3.0 m. The block then slides onto a horizontal plane where it finally comes to rest a distance D from the beginning of the plane. The curved incline is frictionless, but there is a coefficient of friction, μ = 0.5, on the horizontal plane. Determine the velocity of the box at maximum kinetic energy

Answers

The block has maximum kinetic energy at the bottom of the curved incline. Since its radius is 3.0 m, this is also the block's starting height. Find the block's potential energy PE :

PE = m g h

PE = (2.0 kg) (9.8 m/s²) (3.0 m)

PE = 58.8 J

Energy is conserved throughout the block's descent, so that PE at the top of the curve is equal to kinetic energy KE at the bottom. Solve for the velocity v :

PE = KE

58.8 J = 1/2 m v ²

117.6 J = (2.0 kg) v ²

v = √((117.6 J) / (2.0 kg))

v ≈ 7.668 m/s ≈ 7.7 m/s

The velocity of the block at maximum kinetic energy is 7.668 m/s.

From  potential energy formula,

PE = m g h

Where,

m = mass = 2 kg

g -gravitational acceleration = 9.8 m/s²

h - height = 3 m

Put the values in the formula,

PE = (2.0 kg) (9.8 m/s²) (3.0 m)  

PE = 58.8 J

Since,  

PE = KE

Thus,

58.8 J = 1/2 m v ²  

117.6 J = (2.0 kg) v ²  

v = √((117.6 J) / (2.0 kg))  

v = 7.668 m/s

Therefore, the velocity of the block at maximum kinetic energy is 7.668 m/s.

To know more about  potential energy

https://brainly.com/question/21288807

I really need help on this I don’t understand it

Answers

1: 15m

2: 56m/s

3: 34.5m

Sorry if these are incorrect.

Which of the four spheres is this pictures/scene?

A) hydrosphere
B) biosphere
C) geosphere
D) atmosphere

Answers

Answer:

I Believe the answer is

[tex]D. \: \: atmosphere[/tex]

Explanation:

I hope how this helps!

I am traveling at 100 m/s, I hit the brakes and my speed goes down to 50 m/s. It took 30 seconds to slow down. What was my acceleration?

A.5 m/s2
B.-5 m/s2
C.1.7 m/s2
D.-1.7 m/s2

Answers

Answer:

D. -1.7m/s2

Explanation:

the car starts at 100m/s so this is the initial velocity. It ends at 50m/s so this is the final velocity. it took 30 seconds so the time is 30.

[tex]v_{f}=v_{i}+at[/tex]

[tex]a=\frac{\left(v_{f}-v_{i}\right)}{t}[/tex]

[tex]a=\ \frac{\left(50-100\right)}{30}[/tex]

[tex]a=-1.66666666667[/tex][tex]m/s^{2}[/tex]

Therefore, the answer is D

how does a plane mirror work

Answers

Answer:

Plane mirrors work because the light rays create a virtual image behind the mirror. Light rays from the object strike the mirror and reflect according to the law of reflection. ... Therefore, our eye and brain track the light rays backward to a position from which they appear to have come.

A 45kg skater and a 60kg skater are standing still, holding hands on frictionless ice. They push away from each other in opposite directions. If the 45kg skater was measured traveling at 3.5 m/s, how fast was the 60 kg skater traveling?

Answers

Answer:

The 60 kg skater is traveling at 2.63 m/s in the opposite direction from the 45 kg skater.

Explanation:

The velocity of the 60 kg skater can be found by conservation of linear momentum:

[tex]P_{i} = P_{f}[/tex]

[tex]m_{a}v_{i_{a}} + m_{b}v_{i_{b}} = m_{a}v_{f_{a}} + m_{b}v_{f_{b}}[/tex]  (1)

Where:

[tex]m_{a}[/tex]: is the mass of the first skater = 45 kg        

[tex]m_{b}[/tex]: is the mass of the second skater = 60 kg        

[tex]v_{i_{a}}[/tex]: is the initial speed of the first skater = 0 (he is standing still)

[tex]v_{i_{b}}[/tex]: is the initial speed of the second skater = 0 (he is standing still)

[tex]v_{f_{a}}[/tex]: is the final speed of the first skater = 3.5 m/s

[tex]v_{f_{b}}[/tex]: is the final speed of the second skater =?

By replacing the above values into equation (1) and solving for [tex]v_{f_{b}}[/tex] we have:

[tex]0 = m_{a}v_{f_{a}} + m_{b}v_{f_{b}}[/tex]

[tex]v_{f_{b}} = \frac{-m_{a}v_{f_{a}}}{m_{b}} = \frac{-45 kg*3.5 m/s}{60 kg} = -2.63 m/s[/tex]

The minus sign is because the 60 kg skater is moving in the opposite direction from the other skater.

Therefore, the 60 kg skater is traveling at 2.63 m/s in the opposite direction from the 45 kg skater.

I hope it helps you!

What element conducts heat and electricity:

Helium
Potassium
Sulfur
Copper
Arsenic

Answers

The answer is copper
Cooper is the answer question

Which has a charge with the greatest magnitude?
An object with charge 0
An object with charge -2
An object with charge-3
An object with charge +2

Answers

Answer:

an object with charge -3

John wants a new video tape and a new shirt, but he only has $12.00. He buys the video tape and gets $0.52 change. What was his opportunity cost?

Answers

Answer:

You have the answer in your comments. I will be copying it so your question doesn't get deleted.

The answers is $0.58

$11.48

the video tape

the new shirt

PLEASE ANSWER ASAP
The thermal energy produced by an electric heater in three minutes is used to melt wax. The
solid wax is initially at its melting point of 60 0C.
The specific latent heat of the wax is 220 J / g. The heater supplies 7700 J of thermal energy to
the wax. Some of the wax melts.
How much wax melts?

Answers

Answer:

m = 35 g = 0.035 kg

Explanation:

The amount of heat required by a specific mass of wax to be melted at its melting point can be given by the following formula:

[tex]Q = mL[/tex]

where,

Q = Heat Supplied by the Heater = 7700 J

m = mass of wax melted = ?

L = Latent Heat of Fusion of Wax = 220 J/g

Therefore,

[tex]7700\ J = m(220\ J/g)\\m = \frac{7700\ J}{220\ J/g}\\\\[/tex]

m = 35 g = 0.035 kg

A car is traveling at an average speed of 120km/h.how long will it take to travel between two station 525km apart?​

Answers

Answer:

Time taken 4 hrs. 38 minutes

Explanation:

As speed = distance/time interval

So time taken = 4.38

speed=distance/time

we know the speed and we know the distance so we can calculate the time

120km/h=525km/time

time=525km/120km/h=4.375hours or 4 hours and 22 minutes and 30 seconds

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