A motorist accelerates from 0 m/s to 8 m/s in 3 seconds. What is his acceleration? Is this acceleration higher than that of a car which accelerates from 0 to 30 m/s in 6 seconds?
Answer:
[tex]\boxed {\boxed {\sf \frac {8}{3} \ m/s^2 \ and \ not \ higher \ than \ the \ car's \ acceleration }}[/tex]
Explanation:
Acceleration is the rate of change of velocity with respect to time. It is calculated by dividing the change in velocity by the time.
[tex]a= \frac {v_f-v_i}{t}[/tex]
1. Motorist Acceleration
The motorist accelerates from an initial velocity of 0 meters per second to a final velocity of 8 meters per second in 3 seconds.
[tex]v_f[/tex]= 8 m/s [tex]v_i[/tex]= 0 m/s t= 3 sSubstitute the values into the formula.
[tex]a= \frac{ 8 \ m/s - 0 \ m/s }{3 \ s}[/tex]
Solve the numerator.
[tex]a= \frac{8 \ m/s}{3 \ s}[/tex]
[tex]a= \frac{8}{3} \ m/s^2[/tex]
[tex]a \approx 2.667 \m/s^2[/tex]
2. Car Acceleration
The car accelerates from an initial velocity of 0 meters per second to a final velocity of 30 meters per second in 6 seconds.
[tex]v_f[/tex]= 30 m/s [tex]v_i[/tex]= 0 m/s t=6 sSubstitute the values into the formula.
[tex]a= \frac{ 30 \ m/s - 0 \ m/s }{6 \ s}[/tex]
Solve the numerator.
[tex]a= \frac{30 \ m/s}{6 \ s}[/tex]
[tex]a= { 5 \ m/s^2}[/tex]
The motorist's acceleration is 8/3 or approximately 2.667 meters per second squared. This is not higher than the car's acceleration of 5 meters per second squared.
A 2 kg box of taffy candy has 40j of potential energy relative to the ground. Its height above the ground is
Answer:
2.04m
Explanation:
PE=mgh
h= PE/mg
h= 40/2(9.82)
h=40/19.64
h=2.04
Answer:
[tex]20m[/tex]
Explanation:
Formula to find the potential energy is,
Potential Energy = mgh
Here,
m = mass
g = gravitational field
h = height
According to the question, we have to find the height.
Usually, we get g is [tex]10ms^{-2}[/tex]
Let us solve for the answer now.
[tex]P.E. =mgh\\40J =2kg*10ms^{-2} *h\\40 = 20h\\\frac{40}{20}= \frac{20h}{20} \\20m=h[/tex]
Hope this helps you.
Let me know if you have any other questions :-)
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How should the student modify (change) the setup to investigate how a motor works?
A. Attach a crank or use a students finger to force the coil of wire to rotate.
B. Place an iron nail inside the coil of wire.
C. Remove the magnet from the model.
D. Replace the lamp with a battery.
Answer:Students investigate motors and electromagnets as they construct their own simple electric motors using batteries, magnets, paperclips and wire.
Explanation:
A train travel south at the
speed of 120 km/h in 1. 6 hours
Calculate it's displacement
Velocity: 120 miles/hr
Now Distance= Speed × Time
Now Velocity and speed have the same magnitude. Velocity being a vector quantity has a definite direction. Whereas speed is a scalar quantity,it indicates only the magnitude an doesn't define any direction.
Hence Distance = Velocity x time
Distance = 3.5 × 120 = 420 miles
[tex]\\ \sf\longmapsto Displacement=Speed(Velocity)\times Time[/tex]
[tex]\\ \sf\longmapsto Displacement=120(1.6)[/tex]
[tex]\\ \sf\longmapsto Displacement=192km[/tex]
Why are there 16 ounces in a pound but 14 pounds in a stone?
Answer:
The pound originally was 12 oz, but was increased to 15 and then 16 oz later. One should remember that the weights on the scales were marked in oz, of 1, 2, 4, 8, &c, and in one case, the 16 oz simply became the pound.
Explanation:
Hope this helps
total momentum only stays the same if no external forces except for friction are present. true or false
Answer:
i think its false sorry if im wrong.
Explanation:
What are the advantages and disadvantages of each of the methods of calculating maximum oxygen intake?
Answer:
The advantages of the multi-stage fitness test and the direct VO2 measurement are that it is the most accurate testing, the disadvantage it requires hard work. The estimated VO2 max requires less activity, but it is less accurate.
Explanation:
The advantages of the multi-stage fitness test and the direct VO2 measurement are that it is the most accurate testing, the disadvantage it requires hard work. The estimated VO2 max requires less activity, but it is less accurate.
The person above me is correct :).
Have a nice day.
A student claimed energy was lost when she bounced a ball. Was she correct?
Answer:
Yes
Explanation:
Though energy can not be created or destroyed, when the ball is bounce it loses energy.
solid are _______, usually in a regular repeating pattern
Answer:
particles or arranged will be the answer depending on the previous line.
Answer:
Solids are crystalline , usually in a regular repeating pattern.
27. How do you determine the number of valence electrons in a neutral atom?
Answer:
number of valence electrons is equal to the atoms main group number.
Explanation:
main group number for an element can be found from its column on the periodic table.
If a 2 kg ball is traveling at 4 meters per second, what is its kinetic energy?
Answer:
[tex]\displaystyle KE = 32 \ J[/tex]
General Formulas and Concepts:
Energy
Kinetic Energy Formula: [tex]\displaystyle KE = \frac{1}{2}mv^2[/tex]
KE is in Jm is in kgv is in m/sExplanation:
Step 1: Define
Identify variables
m = 2 kg
v = 4 m/s
Step 2: Find KE
Substitute in variables [Kinetic Energy Formula]: [tex]\displaystyle KE = (2 \ kg)(4 \ m/s)^2[/tex]Simplify: [tex]\displaystyle KE = 32 \ J[/tex]Topic: AP Physics 1 - Algebra Based
Unit: Energy
When light hits a red wagon, some of the energy is absorbed and ______.
A. Red light is reflected
B. Red light is absorbed
C. Blue light is reflected
D. All light is absorbed
Answer: A. Red light is reflected
Explanation:
A taxi drives 300.0 m south and then turns and drives 180.0 m east. What is the total displacement of the taxi?
Please find attached photograph for your answer.
Hope it helps.
Do comment if you have any query.
The total displacement of the taxi is approximately 349.68 m.
To find the total displacement of the taxi, we can use the Pythagorean theorem since the south and east directions form a right triangle.
Given:
Distance traveled south = 300.0 m
Distance traveled east = 180.0 m
Treat the south direction as the negative y-direction and the east direction as the positive x-direction.
Using the Pythagorean theorem, the total displacement (D) is given by:
D = √((Δx)² + (Δy)²)
Where:
Δx is the change in the x-direction (east)
Δy is the change in the y-direction (south)
Let's calculate the total displacement:
Δx = 180.0 m (east)
Δy = -300.0 m (south)
D = √((180.0 m)² + (-300.0 m)²)
D = √(32400.0 m² + 90000.0 m²)
D = √(122400.0 m²)
D ≈ 349.68 m
Therefore, the total displacement of the taxi is approximately 349.68 m.
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an empty density bottle has a mass of 25 grams its mass is 40 gram when it is completely filled with water what will be its mass if it completely filled with an acid of relative density 1.25
Answer:
freah water has a density of 1 gram. Subtracted 25 from 40 =15. Multiple 15 by 1.25 = 18.75 grams
What happens to the mass and to the weight of the foam rubber when it is compressed?
Answer:
mass has no change; weight has no change
Explanation:
hope it helps :)
NEED HELP!!!
Sports biometrics are qualitative measurements. Which skills are MOST important for those who want to go into this field?
A.
physical health and coordination
B.
writing and reading comprehension
C.
an understanding of math and statistics
D.
excellent intuition and artistic expression
Sports biometrics are qualitative measurements. The skills that are MOST important for those who want to go into this field are physical health and coordination, therefore the correct answer is option A.
What is exercise?Exercise is the activity that includes the physical movements of the body and results in fitness, wellness, and healthiness of the person to protect and lower the risks of getting diseases. It allows the person to maintain a healthy weight.
Qualitative assessments are used in sports biometrics. Physical fitness and coordination are the two abilities that are MOST crucial for people who desire to work in this sector.
Thus, the most appropriate answer to the given problem is option A.
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Answer: A- physical help and coorelation
Explanation: I have this quiz
How are newtons third law of motion applies to a system of objects
Answer:
Newton's third law of motion states that whenever a first object exerts a force on a second object, the first object experiences a force equal in magnitude but opposite in direction to the force that it exerts. ... Newton's third law is useful for figuring out which forces are external to a system.
Explanation:
is these what you're looking for?
What are the four things that are dependent on the size of an electromagnetic force?
The four things that are dependent on the size of an electromagnetic force are magnitude of force, distance, current and the magnetic strength.
What is electromagnetic force?An electromagnetic force is generated from a strong electric field associated with a magnetic field. A looping current generates a magnetic field around it where, the direction of magnetic field lines are perpendicular to the electric field.
The strength of electromagnetic field definitely depends on the wire size, number of turnings, material of coli and its magnetic strength. There are both electromagnetic force of attraction and repulsion as well.
The things which are dependent on the electromagnetic force are the distance over it can act, the loop current, magnetic strength and its magnitude of magnetic field.
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what is the direction of the magnetic force on the charge?
Answer: The direction of the magnetic force on a moving charge is perpendicular to the plane formed by v and B and follows right hand rule–1 (RHR-1) as shown. The magnitude of the force is proportional to q, v, B, and the sine of the angle between v and B.
Explanation:
what is one important idea from common sense
Explanation:
i think this is the answer
Explain why cookies baked
near the turned-up edges of a cookie sheet receive
more energy than those baked near the center do.
Answer:
It's all about the conduction between the pan and the cookies.
Explanation:
The cookies in the middle of the pan are not going to be cooked as much as the cookies touching both the bottom of the pan and the side of the pan due to the level of heat being given to those outside cookies. Lets try an example:
Lets say you're in a car in the middle of summer. You and your sibling sit on opposite sides of your other sibling, who is sitting in the middle seat. You and your other sibling are pressed up against the door of the car, making you heat up quicker since not only is it hot in the car, the sun is also on you. Meanwhile your other sibling isn't getting as much heat (but is still warm).
I hope this was able to help! There weren't any answers listed, so it may be the following:
- Conduction of heat
- Transfer of heat
- The pan heating up more of the cookie
- The conversion of more heat energy to the outside cookies
Good luck!
Dina has been working out for a few weeks. She wants to really focus on developing healthy habits rather than a very specific goal, like losing weight. She knows that tracking can help maintain health. What could she document that would let her see progress?
A.
She should just create a long-term goal.
B.
She could note the lengths and speeds of her morning runs.
C.
She should write down what she weighs when she wakes up in the morning.
D.
She can record what days she exercises and the type of activity.
Answer:
The correct choice is A. She should just create a long-term goal.
She can record what days she exercises and the type of activity to record her progress. Correct option is D.
Documenting the days she exercises and the type of activity she engages in is a valuable way for Dina to track her progress in developing healthy habits. This approach aligns well with her focus on healthy habits rather than a specific weight-related goal.
Tracking exercise routines allows Dina to:
Monitor Consistency: By recording exercise days, she can see how consistently she's engaging in physical activity. Consistency is key to forming lasting healthy habits.
Variety: Recording the types of activities she participates in helps her ensure that she's incorporating a variety of exercises, which contributes to overall fitness and prevents boredom.
Gradual Improvement: Over time, she can observe if she's able to increase the duration, intensity, or frequency of her workouts, indicating progress in her fitness level.
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which of the follwing is not a step toward planning your goals
Answer:
what are the steps that they give u?
this instrument can used to visualize atoms
Answer:
can someone follow me
Explanation:
Plqae
Answer:
transmission electron microscope
You are on an airplane waiting to take off for a summer trip. Having just come from your physics final, you decide to measure the acceleration of the plane during takeoff by tying your graphing calculator to a string and suspending it. Your new device will do a great job of measuring the plane's constant acceleration during takeoff because, as the plane accelerates your calculator will:________
swing backward and stay there.
What is the answer and full explanation?
Answer:
There is no question or a work that you need help with
. A stone dropped from the top of 90m high building, what will its velocity when it reaches the ground?
Answer:
60m
Explanation:
Because it's just math
describe the motion of a baseball from pitch to being caught in the outfield, use as many concepts as u can
Answer:
Image result for describe the motion of a baseball from pitch to being caught in the outfield, use as many concepts as u can
The rotation of the baseball in combination with the way the seam is spinning through the air causes the ball to move in different patterns. A few common pitches are the fastball, curve ball, slider, and the screwball. Each of these pitches has a different spin because of how the player grips the ball.
Explanation:
Answer:
When a baseball is pitched, hit and flies in the air, one or more of the physical principles formulated over 300 years ago by Sir Isaac Newton act on it. Folklore tells how the mathematician and physicist first realized the law of gravity while observing a falling apple. Had Newton watched a baseball game instead, he might have formulated all three laws of motion by the seventh-inning stretch.
Be safe! tell me if im wrong pls. hope it helps you :D
When enough energy is produced to a gas the electrons on the gaseous atoms being to detach themselves leaving ions of the typical gaseous atoms in plasma phase. The transition from a gas to plasma is called what?
Answer:
it's called ionization
A car has a weight of 24000N which is distributed equally across all four wheels. Each wheel
has a spring of spring constant 400 N/cm.
a) Determine the force on the spring for each wheel.
b) Calculate the compression (x) of each spring when the car rests on the ground.
(a) The force on the spring for each wheel of the given car is 6,000 N.
(b) The compression of each spring when the car rest on the ground is 15 cm.
The given parameters;
weight of the car, W = 24,000 Nspring constant, k = 400 N/cmThe force on the spring for each wheel of the given car is calculated as follows;
[tex]F = F_1 = F_2 = F_3 = F_4 = \frac{W}{4} \\\\F= \frac{24,000}{4} \\\\F = 6,000 \ N[/tex]
The compression of each spring when the car rest on the ground is calculated as;
[tex]F= kx\\\\x = \frac{F}{k} \\\\x = \frac{6,000}{400} \\\\x = 15 \ cm[/tex]
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