1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
irina [24]
3 years ago
7

A parachute on a racing dragster opens and changes the speed of the car from 85 m/sec to 45 m/sec in a period of 4.5 seconds. Wh

at is the acceleration of the dragster?
Physics
1 answer:
Serggg [28]3 years ago
6 0
Acceleration is change is velocity over time. So the change in velocity is 40 and time is 4.5 sec. So the acceleration is 40/4.5=8.89 m/s^2
You might be interested in
The electron structures of atoms are not involved in the emission of:
nekit [7.7K]
The correct one is gamma rays. Lets go over them one by one.

Gamma rays are rays that arise from gamma decay, a type of radioactive decay. Often, after another decay, the nucleus is still unstable and it gives off energy in the form of gamma rays to stabilize itself. Hence, gamma rays have nothing to do with the electron structure, only with the nucleus of the atom.

X-rays are the product of accelerating electrons, hence only specific atoms can emit a specific energy of X-rays; similarly for the photoelectric phenomenon, the energy which is needed for photoelectrons to be created depends on the electron structure of the atom (in both cases, it is important to see how strong the bond between electron and atom is).
Finally, spectral lines differ depending on the electron structure of the atoms since electrons with different energies absorb different frequencies of light.
7 0
3 years ago
Can anyone define thermostat and list electrical appliances that have a thermostat?
Tresset [83]
A thermostat is a switch that operates itself when the temperature
goes above or below a temperature that the user can set.

-- Before you go to bed, you set the thermostat for 65° .
If the temperature in the house goes below 65° during the night,
the thermostat turns on the furnace, and keeps it running until
the house warms up to 65°.  Then it shuts the furnace off.

-- After breakfast, you set the thermostat for 75°.
If the temperature in the house goes above 75°, during the day, 
the thermostat turns on the air conditioner, and keeps it running until
the house cools down to 75°.  Then it shuts the air conditioner off.  

-- On Sunday morning, you put the slow cooker on the kitchen counter,
and you throw in a big roast, a sliced onion, some baby carrots, some
sliced potatoes, some vegetable stock, salt, pepper, garlic, chili powder,
and tomato paste.  Then you put the cover on, turn the power on, and
set the slow cooker to "LOW".  The heater in the slow cooker turns on.
  Whenever the temperature in the crock gets higher than 160°, the
thermostat in the slow cooker turns off the heater, and keeps it off
until the crock cools down to 160°.  Then the thermostat turns the
heater on again.
  By dinner time, you have a hot, juicy, scrumptious pot roast, ready
to eat.  It's not too hot, not too cold, not too tough, not dried out, and
it melts in your mouth.
You're still thinking about it when you go to bed, and your mom gives you
a slice to take to school for your lunch on Monday.
4 0
3 years ago
Where should be the best fit line be drawn on a scatterplot?
eimsori [14]

A line of best fit is a straight line drawn through the most points on a scatter plot, with an equal number of points above and below the line. It is used to investigate the nature of the relationship between two variables. The correct option is d.

<h3>What is line of best fit?</h3>

A straight line with the best fit is one that minimizes the distance between it and some data.

In a scatter plot of varying data points, the line of best fit is used to express a relationship. It is a result of regression analysis and can be used to forecast indicators and price movements.

It is important to note that your line does not need to pass through any of the points on the plot; it only needs to bisect the area that contains the data points.

Thus, none of the options are correct, the correct one is d.

For more details regarding line of best fit, visit:

brainly.com/question/14279419

#SPJ1

8 0
1 year ago
What is a way to make magnets? <br><br> Heating<br> Pressure<br> Freezing
AlladinOne [14]

Answer:

The best easy to make magnrets is by heating it

4 0
3 years ago
Read 2 more answers
Which one of these contains two carbon atoms and six hydrogen atoms​
kondor19780726 [428]
The second option
You can see it in the name that see represents carbon and H represents hydrogen on the periodic table. The numbers after it are the amount of items that are in the molecule
7 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following is an is sample of an experimental scientific investigation
    11·1 answer
  • A horse was grazing at the top of a small hill. The horse got thirsty and ran toward a
    14·1 answer
  • HELP PLEASE <br>what is the total resistance an current in the diagram below
    15·1 answer
  • The value of specific heat for copper is 390 J/kg⋅°C, for aluminun is 900 J/kg⋅°C, and for water is 4186 J/kg⋅°C. What will be t
    10·1 answer
  • A charged object is able to repel
    5·1 answer
  • Milk of magnesia is a slippery, bitter-tasting white substance that is commonly used as a laxative. If the pH of milk of magnesi
    8·1 answer
  • a police officer may issue a ticket when a vehicle is being operated on a highway using a sound amplification system, radio, or
    9·1 answer
  • Sometimes the units for an electric field are written as N/C, while other times the units are written as V/m, using dimensional
    5·1 answer
  • The equivalent resistance of two resistances in series 15.5 0hm and 1.2 ohm in parallel the higher resistance is​
    14·1 answer
  • One of the frequencies used to transmit and receive cellular telephone signals in the United States is 985 MHz. What is the wave
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!