Physics High School

A parachute on a racing dragster opens and changes the speed of the car from 79.33 m/sec to 41.55 m/sec in a period of 5.21 seconds. What is the acceleration of the dragster?

Answers

Answer 1

Answer:

c: -7.25

Explanation:

Here we can use the equation v=u+at

Where v is the final velocity

u is the initial velocity

a is acceleration

and t is time

41.55=79.33+a(5.21)

41.55-79.33=5.21a

-37.78=5.21a

a=-7.25 m/[tex]s^2[/tex]

The negative sign is due to the fact that they are slowing down

Related Questions

2
If the velocity of a bicycle is 10 m/s, how long will it take to cover a distance
of 18 km?
(Ans: 1800 s)

Answers

Answer:

1800 sec = 30 min

Explanation:

Hi there !

18km = 18×1000m = 18000 m

1 s ............... 10m

x s ...............18000m

x = 1×18000/10 = 1800 sec = 30 min

Good luck !

what comes down, but never goes up?

Answers

Answer:

The answer is RAIN!!!!!!

Explanation:

Rain always goes back up in the form of condensation, steam etc etc etc. That is where the rain comes from

__________________ is the process by which sediments get pressed together.

Answers

Answer:

compaction

Explanation:

the answer is compaction

A student examined a patch of mud and recorded several statements about footprints in the mud. Which statement is most likely an inference? A. There are ve footprints in the mud B. The depth of the deepest footprint is 3 centimeters C. The footprints were made by a dog D. The footprints are oriented in an east-west direction

Answers

Answer:

C. The footprints were made by a dog.

The student may have noticed specific characteristics or features in the footprints that lead them to believe that they were made by a dog.

Hence, the correct option is C.

An inference is a conclusion or deduction based on evidence or observations. It involves making an educated guess or interpretation about something that may not be explicitly stated.

Out of the provided options, the most likely inference is The footprints were made by a dog.

This statement is an inference because it involves making a conclusion based on the observed footprints in the mud. The student may have noticed specific characteristics or features in the footprints that lead them to believe that they were made by a dog.

However, this inference might not be a definite conclusion, as there could be other animals or factors that create similar-looking footprints in the mud.

Therefore, The student may have noticed specific characteristics or features in the footprints that lead them to believe that they were made by a dog.

Hence, the correct option is C.

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How long does it take an airplane to fly 1200 miles if it maintains a speed of 300 miles per hour

Answers

Answer:

The answer is

4 hrs

Explanation:

To find the time taken we use the formula

[tex]t = \frac{d}{v} \\ [/tex]

where

d is the distance covered

v is the velocity

t is the time

From the question

d = 1200 miles

v = 300 mi/hr

We have

[tex]t = \frac{1200}{300} = \frac{12}{3} \\ [/tex]

We have the final answer as

4 hrs

Hope this helps you

the diagram deliver of uniform mass supported at the middle point six Queens of equal mass are placed at mark 4 on on the lift hand side can you balance the liver with 12 Mor coins of equal mass if yes where where would you place them if if not why

Answers

Answer:

hmm I don’t understand

Explanation:

Sample Response: Surface tension is the result of
water molecules pulling inward with a strong attractive
force. This attractive force brings the molecules on the
surface of the water close together and causes the surface
of the water to be drawn toward the water molecules
beneath the surface. Since there are no water molecules
above the surface, there are uneven forces. This causes
surface tension, allowing the coin to float on the water's
surface
What did you include in your response? Check all that
apply.
Surface tension is the result of water molecules
pulling inward with a strong attractive force.
The attractive force brings the molecules on the
surface of the water close together.
The attractive force causes the surface of the water
to be drawn toward the water molecules beneath
the surface.
Since there are no water molecules above the
surface, there are uneven forces. This causes
surface tension, allowing the coin to float on the
water's surface.

Answers

Answer:

Explained:

All the statement are correct about surface tension of water. Due to this force, water surface exhibit peculiar properties compared to the bulk of the system.

What is surface tension ?

Surface tension is the potential for liquid surfaces that are at rest to condense into the smallest surface area. Razor blades and insects, which have a density greater than that of water, may float on the surface of the water without even getting partially buried because to surface tension.

Surface tension at liquid-air contacts originates from the liquid molecules' stronger attraction to one another owing to cohesion than to the air molecules due to adhesion.

Surface tension is the result of water molecules pulling inward with a strong attractive force. The attractive force brings the molecules on the surface of the water close together makes attractive force causes the molecules to be drawn toward the water molecules beneath the surface.

Since there are no water molecules above the surface there are uneven forces. This causes surface tension, allowing the coin to float on the water's surface.

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A rubber band is shot parallel

Answers

Huh what are you asking

How far will a football travel if it is booted at a speed of 15 m/s and travels for 3 seconds?

Answers

Answer:

d= 45 m

Select the correct answer.
Which phase in the cell cycle consists of the cell readying itself for its division?
A.
Prophase
B.
Interphase
C.
Anaphase
D.
Metaphase

Answers

Answer:

Explanation:

The phase of cell cycle consists of the cell readying itself for its division is called prophase of the cycle. It is the first phase in mitosis at which a cell duplicate into two daughter cells.

What is cell cycle?

Cell cycle is a biological process by which a cell divide into two genetically identical daughters cells. Prophase is the initial stage of cell division in both mitosis and meiosis. When the cell reaches prophase, DNA replication has already started after interphase.

The chromatin reticulum condenses and the nucleolus vanishes during prophase, which are the key events. Other phases are interphase, anaphase etc. and the last stage is called the telophase.

Cell cycle is a very important biological process by which organisms are producing their offspring. This process differ in each level of organism where for all the starting phase is called prophase.

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a stone thrown horizontally from the top of a vertical wall with a velocity of 15m/s,hits the horizontal ground at a point 45m from the base of the wall. calculate the height of the wall. g =10m/s

Answers

Answer:

The height of the wall is 45 m

Explanation:

Horizontal Motion

When an object is thrown horizontally with an initial speed v from a height h, the maximum horizontal distance traveled by the object, also called the range can be calculated as follows:

[tex]\displaystyle d=v\cdot\sqrt{\frac {2h}{g}}[/tex]

If we know the range and want to calculate the height it was thrown from, we solve the equation for h:

[tex]\displaystyle h=\frac{d^2g}{2v^2}[/tex]

We'll use the approximate value of g=10\ m/s^2.

The stone was thrown from the top of a wall with a speed of v=15 m/s and it hits the ground d=45 m away from the base of the wall. Calculating:

[tex]\displaystyle h=\frac{45^2\cdot 10}{2\cdot 15^2}[/tex]

[tex]\displaystyle h=\frac{2025\cdot 10}{2\cdot 225}[/tex]

[tex]\displaystyle h=\frac{20250}{450}[/tex]

h = 45 m

The height of the wall is 45 m

Natural history research involves ____ unobsevable and unrepeatable past events.
A. Interpreting B. Verifying C. Asking
please answer soon

Answers

If I could solve one of the world's greatest problems, then I would like to choose pollution problem.

I would choose the pollution problem to be solved because it affects various natural resources of the environment.

Pollution is one the biggest issue in the world these days and It is rising day by day. It affects the environment directly or indirectly.

There are various types of pollution. Some of thees are

Water pollutionAir pollutionNoise pollution.

The main cause of water pollution is various toxic substances got mixed in various water resources.

Similarly Air Pollution happens because of the harmful gases and substances present in the air.

Noise pollution occurs due to the sound of machines, loud musics and sound of vehicles.

Every human being should take steps to solve the issue of the pollution.

For more information about the pollution, follow the link given below.

https://brainly.com/question/1040743.

5. Select all of the following which are vector values. *
(3 Points)
Distance
Displacement
Speed
Velocity
Option 5
Acceleration

Answers

Answer:bum

Explanation:

Eric is walking forwards at 0.5 m/s and then hears a black
bear charging from behind. He continues to move forward
and increases his speed to 10 m/s within 3 seconds. What was
Eric's acceleration?
0 3.2 m/s
O 3.2 m/s^2
0 -3.2 m/s^2
O 10 m/s^2
O Other:

Answers

Answer:

3.2 m/s^2

Explanation:

current velocity minus intitial velocity, divided by time: a=(v2-v1)/t

Which will hit the ground first if a golf ball and a soft ball are dropped from the same height simultaneously?

Answers

Answer:

they both would hit at the same time

Explanation:

Answer: Whichever one is heavier will hit first

Explanation:

what is the definition of sewer?

Answers

Answer:

an underground conduit for carrying off drainage water and waste matter

Explanation:

Answer:

an underground conduit for carrying off drainage water and waste matter.

Explanation:

RACTICE Uranium (molar mass = 283.03 g/mol) has the largest molar mass of any element naturally found on Earth. What is the mass of 7.50 mol of uranium?

Answers

Answer:

The answer is 2122.73 g

Explanation:

The mass of a substance given it's molar mass and number of moles can be found by using the formula

mass = Molar mass × number of moles

From the question

molar mass = 283.03 g/mol

number of moles = 7.5 mol

So we have

mass = 283.03 × 7.5 = 2122.725

We have the final answer as

2122.73 g

Hope this helps you

An Object moving at a velocity of 30 m/s slows to a stop in 7 seconds. What was its acceleration

Answers

Answer:

The answer is 4.29 m/s²

Explanation:

The acceleration of an object given it's velocity and time taken acting on it can be found by using the formula

[tex]acceleration = \frac{velocity}{time} \\ [/tex]

From the question

velocity = 30 m/s

time = 7 s

We have

[tex]acceleration = \frac{30}{7} \\ = 4.285714...[/tex]

We have the final answer as

4.29 m/s²

Hope this helps you

What is the rate which distance changes over time.

Answers

Answer: Speed

Explanation:

Speed is Defined as defined as D/T or distance over time

Other Questions

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