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ivann1987 [24]
3 years ago
10

Circular Motion A 650-kg car moving at 8.5 m/s takes a turn around a circle with a radius of 48.0 m. Determine the acceleration

acting upon the car. Use a = v2/ r
Physics
1 answer:
ollegr [7]3 years ago
8 0

Answer:

Explanation:

The mass of the car doesn't matter because On a flat curve the mass of the car does not affect the speed at which it can stay on the curve. You would need the mass if you were solving the the centripetal force acting on the car, but not the acceleration.

a=\frac{v^2}{r} and filling in

a=\frac{(8.5)^2}{48.0} and we need 2 significant digits in our answer. That means that

a = 1.5 m/sec²

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A group of friends wants to go to the amusement park. They have no more
Mumz [18]

Answer:

p ≤ 8

Explanation:

Let's go over what we know that can help us build an inequality:

we know that these friends can spend no <em>more </em>than $325, meaning that they can either spend exactly $325, or they could spend less. This is our first clue, that one side of the inequality will be 325, and that the inequality sign will be <em>less than or equal to </em>( ≤ ) :

amount spent ≤ 325

Now, we want to figure out how many people can go (p)--but there's something we need to consider first--the parking.

Assuming that all friends take one car, we know we will have 11 dollars less to spend on admission (you can write this two ways).

amount spent on tickets + 11 ≤ 325

or, we can simplify it:

amount spent on tickets + 11 ≤ 325

                                          - 11     -11

amount spent on tickets ≤ 314

(I will be using the second way, you could always plug it back into the first way though)

now, we know that each "p" that we include will be multiplied by 39.25

         <em>Why?  Imagine we have one p (one person), they will cost 39.25, so we could write that as (p · 39.25) ,  ( 1· 39.25 ) -- we use × because that's how many </em><em>times</em><em> we're adding the number.  If we have two p, we could write it as (2p · 39.25)--there's an easier way to do this though</em>

<em />

So, we can write "p" to stand for all possible values of p possible,

p · 39.25 ≤ 314                  (we write this slightly differently):

39.25p ≤ 314          

Now, let's simplify!

   39.25p ≤ 314          

÷ 39.25     ÷ 39.25  (divide by 39.25 to isolate p)

          p   ≤   8

So, we know that the number of friends admitted must be less than or equal to 8, expressed as:

p ≤ 8

hope this helps! let me know if you need clarification on anything :)

5 0
2 years ago
Read 2 more answers
Explain why, when you have a fever, you have to keep a thermometer in your mouth for a certain length of time in order to read y
Marrrta [24]

Answer:

Because the certain period of time is needed for reaching the right temperature. After the first seconds of placing the thermometer under the tongue, readings will continue to increase and the F (or C) symbol will flash during measurement.

Explanation:

# Checking our  body’s temperature with a thermometer is an easy way to see if a fever is present. There are many different types of thermometers we can use to measure temperature. When using any kind of thermometer, we need to follow the instructions that come with the thermometer in order to read the correct temperature.

# The question above is about how to use a digital thermometer, which can be used three different ways, including oral, rectal, axillary. To keep a thermometer in the mouth (place it under the tongue) for a certain length of time is the oral way to use it. This method is used for adults and children 4 and over who are able to hold thermometer in mouth. So, we call this kind of thermometer as "digital oral thermometer".

# Using a digital oral thermometer, we should follow the followings:

   1- Wash the hands with soap and warm water.

   2- Use a clean thermometer, one that has been washed in cold water, cleaned with rubbing alcohol, and then rinsed to remove the alcohol.

   3- Do not eat or drink anything for at least five minutes before taking the temperature because the temperature of the food or beverage could make the reading inaccurate. It is neccesary to keep the mouth closed during this time.

   4- Place the thermometer tip under the tongue.

   5- Hold the thermometer in the same spot for about 40 seconds.

   6- Rinse thermometer in cold water, clean it with alcohol and rinse again.

# In the instruction N5: Readings will continue to increase and the F (or C) symbol will flash during measurement. Usually, the thermometer will make a beeping noise when the final reading is done (usually about 30 seconds). If we are keeping track, record the temperature and the time.

And the MOST IMPORTANT THING is: we should add a degree to oral reading for the most accuracy. Rectal temperatures are considered most accurate indication of the body’s temperature.

3 0
3 years ago
A 1900kg airplane is flying at an altitude of 510 above the ground. What is the gravitational potential energy in Joules?
Natalija [7]

Answer: 9496200 joules

Explanation:

Gravitational potential energy, GPE is the energy possessed by the moving plane since it moves against gravity.

Thus, GPE = Mass m x Acceleration due to gravity g x Height h

Since Mass = 1900kg

g = 9.8m/s^2

h = 510 metres (units of height is metres)

Thus, GPE = 1900kg x 9.8m/s^2 x 510m

GPE = 9496200 joules

Thus, the gravitational potential energy of the airplane is 9496200 joules

8 0
3 years ago
The part of the atom that accounts for electricity is the
astraxan [27]
The part of the atom that accounts for electricity is the electron. The correct option among all the options given in the question is option "D". Electrons are capable of moving from one atom to another very easily. The flow of the electrons is actually responsible for electricity to pass. When one electron starts moving in one direction, the other starts following it and this results in the flow of electricity.
8 0
4 years ago
If you push a box across the floor, the box experiences what kind of friction?
Talja [164]
I think it is kinetic friction not the best at physics
4 0
3 years ago
Read 2 more answers
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