Answer:
Explanation:
The first displacement when the mile reading changes from 257 to 145
= 257 - 145
= 112 km
Then he turns back . This time the displacement will be negative .
The mile reading changes from 145 to 175
displacement = - ( 175 - 145 )
= - 30 km
Final displacement = 112 - 30
= 82 km .
Fully describe or explain the solid state of matter. You should include at least 5 ways to characteristics or descriptors that prove a solid is a solid.
Answer:
Explanation:
The solid state is one of the 3 stages which matter undergoes in addition to the liquid and the gaseous state. Matter in it's solid state contains atoms which are closely packed, In this stage, matter exhibits the least amount of kinetic energy of all three stages hence hindering movement of its particles and exhibiting firmness and rigidity. Solids exhibits a regular arrangement of it's molecules which differs from the scattered nature of gaseous particles and slightly ordered nature of liquid molecules. Solids exhibits a defined volume , and shape with molecules held together by string attractive forces. Solids can change into liquid through melting or transform directly into gaseous state through sublimation.
5g 508mg
Which one is greater
Answer:
5g
Explanation:
Answer: 5g is greater than 508mg
Explanation:
It's greater because of the units. Although 508 is a larger number, grams are greater that milligrams.
what happens when two forces act in opposite direction
Answer: When two forces act in the same direction, they add together.
Explanation:
Answer:
When forces act in opposite directions, they are combined by subtracting the smaller force from the larger force.
Hope this helps! （づ￣3￣）づ╭❤～
The volume of gas in a flexible container at a depth of 10 m/33 ft will expand to ______ its original volume if taken to the surface.
Answer:
Twice its original volume.
Explanation:
For diving applications, 10 m/33 feet of sea water is taken to exerts a gauge pressure that is the same pressure as the atmosphere, or one ata/bar.
This means that we add one ata/bar pressure for every 10 m/33 feet you descend.
The effect of this is that, at 10 m/33 ft, you're under an absolute pressure of two ata/bar, one from air and one from water. Adding another 10 m/33 ft to this depth to make it 20 m/66 ft, puts you under under three ata/bar of pressure and so on.
Descending to a depth of 10 m/33 ft, with a flexible container means that you have double the ata/bar pressure acting on you. If you decide to resurface, the pressure on the flexible container will reduce by a factor of two.
Since volume is inversely proportional to the pressure, if the pressure reduces by a factor of 2, then the volume will increase by a factor of two, or we can say that the volume will double.
The rotating drum in a clothes-dryer has a radius of 0.31 m. If the acceleration at the rim of the drum is 27 m/s2, what is the tangential speed of the rim?
Answer:
v = 2.89 m / s
Explanation:
This is a kinematics exercise, the centripetal acceleration is
a = v² / r
where a is the acceleration, v is the velocity and r the radius
let's clear
v = √a r
let's calculate
v = √ (27 0.31)
v = 2.89 m / s
this is the speed of the drum which is constant
The tangential speed of the rim will be "2.89 m/s".
Tangential speed:Tangential speed seems to be the rate beyond which the item moving throughout a circle travels.
A wider radius indicates that perhaps the thing goes a considerable distance.
According to the question,
Radius, r = 0.31 m
Acceleration, a = 27 m/s²
We know,
→ [tex]a = \frac{v^2}{r}[/tex]
or,
→ [tex]v= \sqrt{ar}[/tex]
By substituting the values,
[tex]= \sqrt{27\times 0.31}[/tex]
[tex]= 2.89 \ m/s[/tex]
Thus the answer above is right.
Find out more information about the tangential speed here:
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Ac=v^2/r solve for v, solve for r
Answer:
v = √ac×r
r = [tex]\frac{v^2}{ac}[/tex]
Answer:
Explanation:
Sorry cant help
Which surface has the most friction? a An ice rink b A grassy field c A paved road
Answer:
An Ice Rink
Explanation:
Answer:
b
Explanation:
i remember this from a test
When the pressure on a gas increases,what does the volume do?
Answer:
As pressure goes up, volume goes down.
Explanation:
Pressure and volume of a gas are inversely proportional. This means that as pressure goes up, volume goes down. And as volume goes up, pressure goes down.
Cheers.
Answer:
It goes down.
Explanation:
When the pressure of the gas goes down the volume goes up
An object has a mass of 20kg, what is its weight on Earth?
Answer:
The formula is W=mg.
W=20×10=200.
Answer:
[tex]\Huge \boxed{\mathrm{200 \ N}}[/tex]
Explanation:
[tex]\sf Weight \ (N)= mass \ (kg) \times acceleration \ of \ gravity \ (m/s^2)[/tex]
[tex]W=mg[/tex]
The mass of the object is 20 kg.
The acceleration of gravity is 10 m/s².
[tex]W=20 \times 10[/tex]
[tex]W=200[/tex]
The weight of the object is 200 N.
Which statement is true about a person who is in good health? She spends a lot of time alone She has few friends at school She may not be in good physical health She gets along with others
Explanation:
Engaging in social and productive activities you enjoy, like taking an art class or becoming a volunteer in your community, may help to maintain your well-being.
Research tells us that older people with an active lifestyle:
Are less likely to develop certain diseases. Participating in hobbies and other social and leisure pursuits may lower risk for developing some health problems, including dementia.
Have a longer lifespan. One study showed that older adults who reported taking part in social activities (such as playing games, belonging to social groups, or traveling) or meaningful, productive activities (such as having a paid or unpaid job, or gardening) lived longer than people who did not. Researchers are further exploring this connection.
Are happier and less depressed. Studies suggest that older adults who participate in what they believe are meaningful activities, like volunteering in their communities, say they feel happier and healthier. One study placed older adults from an urban community in their neighborhood public elementary schools to tutor children 15 hours a week. Volunteers reported personal satisfaction from the experience. The researchers found it improved the volunteers’ cognitive and physical health, as well as the children’s school success. Researchers think it might also have long-term benefits, lowering the older adults’ risk of developing disability, dependency, and dementia in later life.
Are better prepared to cope with loss. Studies suggest that volunteering can help with stress and depression from the death of a spouse or other loved one. Among people who experienced a loss, those who took part in volunteer activities felt more positive about their own abilities (reported greater self-efficacy).
May be able to improve their thinking abilities. Another line of research is exploring how participating in creative arts might help people age well. For example, studies have shown that older adults’ memory, comprehension, creativity, and problem-solving abilities improved after an intensive, 4-week (8-session) acting course. Other studies are providing new information about ways that creative activities like music or dance can help older adults.
The scattering of dissolved particles evenly is called
Answer:
the process of that happening is called Dissolving
the substance that is dissolved is called
Solute
HELPPPPP 9) Type three problem questions using this sentence stem,
What is the effect of _____
on ______
Answer: what is the effect of temperature on kinetic energy ?
Explanation: on what the scientists depend while theyre doing experiences to prove their results ??
Describe the properties of mains electricity in the UK
Answer:
it helps create products like heat and light and the electric charge is a scaler quantity. there's also voltage and frequency.
Explanation:
What did Galileo complain was hurting Catholic science?
Answer:
well his enemies accused him of attacking scripture and meddling affairs
Explanation:
pls tell me if is right
Which fact was most likely discovered between the time of Mendeleev’s table and the time of Moseley’s table that helped Moseley develop his version?
Answer:
The number of protons in an atom is different than the atom's total mass.
Explanation:
Mendeleev had presented the first structured periodic table in 1869. But, in 1913, Henry Moseley developed the modern periodic table. The crucial difference between the two periodic tables is that Mendeleev's periodic table is generated on the basis of the atomic masses of chemical elements while the chemical element's atomic numbers were the main focus of Moseley's periodic table. There were just 56 chemical elements in Mendeleev's periodic table. On the other hand, 74 chemical elements are presented in Moseley's periodic table.
Answer:
it is
Explanation:
The correct option is THE NUMBER OF PROTONS IN AN ATOM IS DIFFERENT FROM THE ATOM'S TOTAL MASS.
During the time Mendeleev developed his periodic table, scientists believed that the number of protons in an atom determine the mass of that atom. But withing the forty years that separated Mendeleev periodic table from Moseley periodic table it was found out that this was not so, this fact helped Moseley in his own work.
What is the density of the baseball?
g/cm3
Answer:
0.70 g/cm3
Explanation:
Step 1 : weight ball to get the mass,
step 2 : measure the ball to find the length,
step 3 : multiply the length three times to calculate the volume,
step 4 : divide the mass with the volume to get the density.
Answer: 0.73
Explanation:
A penny has a mass of 2.5 grams. It is laying on level ground. What is the normal force acting on the penny?
Answer:
0.0245 N
Explanation:
Given that a penny has a mass of 2.5 grams. Convert the gram to kilogram by dividing it by 1000
2.5/1000 = 0.0025kg
It is also given that it is laying on level ground.
The normal force will be directly opposite direction to the weight of the penny. Which will be of equal magnitude.
What is the normal force acting on the penny ?
Normal force = weight of the penny
Weight = mg
Where g = 9.8 m/s^2
Weight = 0.0025 × 9.8
Weight = 0.0245 N
Therefore, the Norma force = 0.0245N
Which of the following would cause a fan cart to accelerate the least?
- doubling the speed of the fan
- pointing the fan exhaust downward
- tripling the speed of the fan
- pointing the fan exhaust upward
Answer:
The correct option is;
-Pointing the fan exhaust upward
Explanation:
The fan cart transfers reaction force from the jet of air it blows through the exhaust into motion in the opposite direction of the jet. By pointing the fan exhaust upwards, the direction of motion of the cart is therefore, into the ground. Due to the solid nature of the ground the motion is resisted, and by Newton's first law of motion, a body will remain in motion unless resisted by a force. In the case of the question, the ground is resisting the motion of the cart and the cart will remain at rest and having zero acceleration.
When replacing an existing luminaire (fixture) with a ceiling-suspended paddle fan, make sure that the existing outlet box is listed and marked as ____________________.
Answer:
When replacing an existing luminaire (fixture) with a ceiling-suspended paddle fan, make sure that the existing outlet box is listed and marked as ________one that can support the fan__________
Explanation:
Because an outlet which is not listed an cannot support the fan will lead to its damage and short lifespan
What is gravitational force? Write its SI unit.
Identify the independent, dependent, and constant variables for different experiments.
Experiment 1: A soap manufacturer runs an experiment to compare the foaming action of different dish detergents. Equal amounts of each brand of detergent are placed in identical containers half-filled with water. The water and dish detergent are at a temperature of 20°Celsius. Each container is agitated for 30 seconds, and then the height of the foam is measured.
ANSWER:
IV, Type of dish detergent. DV, height of foam. CV, type of container, amount of water in container, temperature of water, time the container is agitated.
Explanation:
Independent variable(IV)- what you change during the experiment.
dependent variable(DV)- what you're measuring during an experiment. The dependent variable is DEPENDENT because it's results DEPEND on the independent variable at play.
Constant variables(CV)- things that do not change in order to isolate the tested variables as much as possible.
A remote controlled car starts from rest and accelerates at 2 m/s² for 6.5 seconds. What is the final velocity of the car after the acceleration takes place?
Answer:
The final velocity of the car after the acceleration takes place is 13 m/s.
Explanation:
The final velocity can be calculated using the following equation:
[tex] V_{f} = V_{0} + at [/tex]
Where:
[tex]V_{0}[/tex]: is the initial velocity = 0 (starts from rest)
a: is the acceleration = 2 m/s²
t: is the time = 6.5 s
Hence, the final velocity is:
[tex] V_{f} = V_{0} + at = 0 + 2 m/s^{2}*6.5 s = 13 m/s [/tex]
Therefore, the final velocity of the car after the acceleration takes place is 13 m/s.
I hope it helps you!
Hay Que!
Explain world’s most famous formula which describes the relationship between mass and energy. Also give 1 suitable application.
Answer:
E = mc² relation between mass and energy
it is only applicable in space. example One of the most extraordinary things about Einstein's energy-mass equivalence equation is its simplicity.A 100 watt light bulb uses 100 joules of energy every second, i.e. one watt is one joule per second.Explanation:
hope it will help you :)
The weight of a body is variable from place to place.why
The mass is the same, but the gravity influences the weight.
+ gravity, + pressure, + weight.
Hope to help you!
A raised plaster cover (often called a plaster ring or mud ring) is permitted to increase the maximum number of conductors permitted in an outlet box when it is _____.
Answer:
When it is marked with its cubic-inch volume
Explanation:
Because this allows for best and efficient identification
If low CVP precipitates a suction alarm, rapid infusion of volume can remedy the situation after dropping the P-level.
True / False.
Answer:
d
Explanation:
Answer:true
Explanation:
It is easier to lift the load as the load is pushed towards the wheel in a wheelbarrow
A steam engine generating 5 hp is raising a load weighing 2000 lb.How high will thebload be raised in 10 s.
Answer:
Explanation:
bi
The height raised by the load is 4.18 m.
Given data:
The power rating of steam Engine is, P = 5 hp = 5 × 745.7 = 3728.5 W.
The weight of load is, W' = 2000 lb = 2000 × 4.45 = 8900 N.
The time interval is, t = 10 s.
We know that the rate of doing any work is known as Power. So here the power will be equal to the work done to raise the load for 10 s of time. Then the expression is,
[tex]P = \dfrac{W}{t}\\\\P = \dfrac{W' \times h}{t}[/tex]
Here, h is the height raised by load.
Solving as,
[tex]3728.5 = \dfrac{8900 \times h}{10}\\\\h = 4.18 \;\rm m[/tex]
Thus, we can conclude that the height raised by the load is 4.18 m.
Learn more about the mechanical power here:
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Chapter 1 - Total Health Quiz Which of the following is not an aspect of physical health?
a. Eating well
b. Making friends
c. Being active
d. Getting enough sleep
Answer:
the answer seems to be B
to t
Mass of propane = 4,300 g
Volume of propane = 10,000 mL
The density of liquid(. )
g/mL.
Answer:
Welcome ShalomMHNCB Phx
Explanation:
the answer is because I just had this question and I got it wrong so te answer is 0.43
Answer:
The density of liquid propane is 0.43 g/mL
Explanation:
On EDG