nathangirnet
10.12.2020 •
Physics
1.
A car is moving in a circle or radius r = 25 meters, in a parking lot at 10 m/s. What is the car's
centripetal acceleration?
Solved
Show answers
More tips
- W Work and Career How much does an honest traffic police officer earn in a day?...
- G Goods and services How to sew a ribbon: Tips for beginners...
- L Leisure and Entertainment How to Learn to Draw Graffiti: Tips for Beginners...
- F Family and Home How to Remove Tar Stains: Tips and Recommendations from Experts...
- F Family and Home How to Remove Fading from Clothes: Tips and Tricks...
- S Sport How to Do a Jumping Split...
- H Health and Medicine How Did Inna Lose Weight on Dom 2?...
- F Family and Home How to Properly Fold Napkins in a Napkin Holder?...
- F Food and Cooking How to Set Up Ventrilo - The Ultimate Guide...
- S Science and Technology How to Make a Homemade Smoker: The Ultimate Guide...
Answers on questions: Physics
- P Physics Ajar can hold 60 mL of liquid. It is 10 cm high and 2 cm wide. The length of the jar is: 3 cm 20 cm 120 cm 1,200 cm...
- P Physics A current of I = 3.8 A is passing through a conductor with cross sectional area A = 2.5 x 10^-4 m^2. The charge carriers in the conductor, electrons, have a number density n =...
- P Physics Can i get an original definition for: Acceleration, Speed, Average Speed, Gravity, Weight, Mass,Inertia, Free Fall, Projectile Motion....
- P Physics Does anyone just wanna sit on the roof of a house, look at the sky and talk about how crazy life is...
- P Physics Suppose you have a black male rabbit and a black female rabbit. Each has a dominant gene (F) for black fur and a recessive gene (f) for white fur. What do Mendel’s rules predict...
- P Physics When the man on the chair stretches out his arms, what will happen to the moment of inertia?...
- P Physics The Earth s diameter at the poles is . equal to its diameter at the equator greater than its diameter at the equator less than its diameter at the equator...
- P Physics What happens during free association? A person talks about a dream, making connections by openly talking. A therapist helps you learn empathy for others. You explore the role of...
- P Physics Using Kepler s third law, what is the period of Mercury if Kepler s ratic is 0.98 years?/AU3 and the distance from the Sun is 0.39 AU?...
- H History 2. What is a change to the Constitution called?...
Ответ:
Given - radius = 25 m
velocity = 10 m/s
Solution -
a = v^2 by r
a = ( 10 )^2 by 25
a = 100 by 25
( cut 25 and 100 because 25 x 4 = 100 )
a = 4 m/s^2
.:. The centripetal acceleration of the car
= 4 m/s^2.
Ответ:
Here is the missing part of the question
To Determine the heat transfer, in kJ if the final temperature in the tank is 110 deg C
Explanation:
The image attached below shows the process on T - v diagram
At State 1:
The first step is to find the vapor pressure
= 0.5 × 232 kPa
= 116 kPa
The initial specific volume of the vapor is:
At State 1:
The next step is to determine the mass of water vapor pressure.
= 1.578 kg
Using the ideal gas equation to estimate the mass of the dry air
For the specific volume , we get the identical value of saturation temperature
Thus, at , condensation needs to begin.
However, since the exit temperature tends to be higher than the saturation temperature, then there will be an absence of condensation during the process.
Heat can now be determined by using the formula
Q = ΔU + W
Recall that: For a rigid tank, W = 0
Q = ΔU + 0
Q = ΔU
Q = U₂ - U₁
Also, the mass will remain constant given that there will not be any condensation during the process from state 1 and state 2.
At State 1;
The internal energy is calculated as:
At = 125° C, we obtain the specific internal energy of air
SO;
At = 125° C, we obtain the specific internal energy of water vapor
= 6.216 × 284.714 + 1.578 × 2534.5
= 5768.716 kJ
At State 2:
The internal energy is calculated as:
At temperature 110° C, we obtain the specific internal energy of air
SO;
At temperature 110° C, we obtain the specific internal energy of water vapor
= 6.216 × 273.862 + 1.578 × 2517.9
= 5675.57 kJ
Finally, the heat transfer during the process is
Q = U₂ - U₁
Q = (5675.57 - 5768.716 ) kJ
Q = -93.146 kJ
with the negative sign, this indicates that heat is lost from the system.