The answer is A.
The answer is A.
The answer is A.
An automobile traveling along a straight road
increases its speed from 53 ft/s to 68 ft/s in
180 ft.
If the acceleration is constant. how much
time elapses while the auto moves the 180 ft?
Answer in units of s.
Answer:
t = 2.97[s]
Explanation:
To solve this problem we must use the following kinematics equations, we must bear in mind that the positive sign of the acceleration value means that the car is increased its speed.
[tex]v_{f}^{2} =v_{o}^{2} +(2*a*(x-x_{o} ))[/tex]
where:
x - xo = 180 [ft]
a = acceleration [ft/s^2]
Vo = initial velocity = 53 [ft/s]
Vf = final velocity = 68 [ft/s]
Now replacing we find:
(68^2) = (53^2) + (2*a*180)
a = 5.04 [ft/s^2]
Now using the following equation:
[tex]v_{f}=v_{0}+a*t[/tex]
68 = 53 + (5.04*t)
t = (68 - 53)/5.04
t = 2.97[s]
A football was kicked so that it traveled 65 yards in 3.0 total seconds. What was the speed
and angle above horizontal that the ball was kicked?
Answer:
vx = 65 yd/3 sec = 21.7 yd/sec since horizontal speed is constant
vy = g t = (32 / 3) yd/sec^2 * 1.5 sec = 16 yd/sec where 32/3 is the acceleration due to gravity in yds / sec^2 and 1.5 is the time to travel each way in the vertical direction
V = (vx^2 + vy^2)^1/2 = (21.7^2 + 16^2)^1/2 = 27 yd/sec
tan theta = vy/vx = 16 / 21.7 = .737 theta = 36.4 deg
You can check using the range formula:
R = v^2 sin (2 theta) / g = 27^2 * .955 / (32 / 3) = 65.3 yds
The difference from 65 yds may be rounding error.
A car is traveling down the highway cruise control at 50m/s (this means its is traveling with a constant velocity NOT accelerating). If it does this for 5 minutes (300s), how far does it travel?
Given parameters:
Speed of car = 50m/s
Time of travel = 5minutes (300s)
Unknown;
Distance of travel = ?
To solve this problem, we need to understand how speed relates with distance and time.
Speed is a physical quantity. It is the distance traveled divided by time taken.
Speed = [tex]\frac{distance}{time}[/tex]
So,
Distance = speed x time
Input the parameters and solve for the distance;
Distance = 50m/s x 300s
Distance = 15000m
The distance covered during this time interval and speed is 15000m
A toy plane with a mass of 1.5 kg is flying in the air at 8.0 m/s. What is its kinetic energy?
Given : A toy plane has a mass of 1.5kg . It is flying in air at a speed of 8m/s .
To Find : The Kinetic energy of the plane .
Solution : The mass of the toy plane is 1.5kg and Velocity is 8.0 m / s . So we know the formula to find the kinetic energy as ,
[tex]\boxed{\red{\bf Energy_{Kinetic}=\dfrac{1}{2}mv^2}}[/tex]
On substituting the respective values,
⇒ KE = ½mv².
⇒ KE = ½ × 1.5 kg × (8 m/s)².
⇒ KE = ½ × 1.5 kg × 64m²/s² .
⇒ KE = 48 J .
Hence the Kinetic energy of the plane is 48Joules.
The kinetic energy of a plane having a mass of 1.5 kg flying in the air at 8.0 m / s is 48 J.
What is kinetic energy?Kinetic energy is a type of power that a moving object or particle possesses. When an object undergoes work, which involves the transfer of energy, by exerting a net force, the object accelerates and consequently obtains kinetic energy.
A moving object or particle has kinetic energy, which depends on both its mass and its rate of motion. The type of motion can be vibration, rotation on an axis, translation (or travel along a path from one place to another), or any combination of these.
Given:
The mass of the toy plane, m = 1.5 kg,
The velocity of the toy plane, v = 8 m / s,
Calculate the kinetic energy by the formula given below,
[tex]KE = 1/2mv^2[/tex]
Substitute the values,
KE = 1 / 2 × 1.5 × 8²
KE = 1 / 2 × 1.5 × 64
KE = 48 J
Therefore, the kinetic energy of a plane having a mass of 1.5 kg flying in the air at 8.0 m / s is 48 J.
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A ball is thrown vertically down from the edge of a cliff with a speed of 4 m/s,
how high is the cliff, if it took 12 s for the ball to reach the ground?
Do Now: You are asked to go to downtown Newark and pick up a small bag of materials for a grant project. Pay is $25. The materials will be delivered to Room 224, 2nd floor in Barringer High School. Create a numbered procedure, a list of steps that you will take to pick up and deliver the materials. Click for Example
Answer:
sorry im not in physics
Explanation:
Why was Copernicus reluctant to publish his ideas?
Answer:
He was scared
Explanation:
Answer:
He Feared persecution .
Explanation:
A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the slope , its speed is 4 m/s. But 3 seconds later at the bottom of the slope , its speed is 22 m/s. What is the average acceleration?
Please Show Steps or work on how to do it :(( This topic confuses me and I just get lost.
Lynette has made it to the final round of a tennis tournament. While watching a match between two other players, she attributes her racing heart and rapid breathing to excitement. The next night, just before her own match, she attributes her racing heart and rapid breathing to nervousness. Which theory of emotion best explains this situation?
Answer: D. the Schachter-Singer theory
Explanation:
The Schachter-Singer theory which is also called the Two-factor theory of emotion, explains that humans feel emotion after they appraise the changes in their body in reaction to a stimuli as this would then give them a better means to tell which emotion they are feeling.
Lynette in the first instance noticed she had a racing heart and rapid breathing in response to watching two other players and was then able to appraise this and attribute it to excitement.
When the same thing occurs again but under different circumstances, she is able to appraise it differently and attribute it to nervousness which shows that the Schachter-Singer theory is the relevant theory.
Why is the nucleus positive in charge?
Answer:
The nucleus has an overall positive charge as it contains the protons. Every atom has no overall charge (neutral). This is because they contain equal numbers of positive protons and negative electrons. These opposite charges cancel each other out making the atom neutral.
Explanation:
1. A stone is thrown horizontally at 8.0 m/s from a cliff 78.4 high. How far from the base of the cliff does the stone strike the ground?
Answer:
64m away if the horizontal speed does not change
Explanation:
What are the properties of a photon?
Answer:
Properties of a photon would be:
does not have a electric chargedoes not have a massphotons are stableknown to carry energyExplanation:
Remember that photons are a quantum of light that carry energy while having no mass, they're used mainly in cameras and in other machinery that helps emit radiation.
Hope this helps.
Neglecting air resistance, if you throw a ball straight up with a speed of 20 m/s how fast will it be moving when you catch it
A microwave oven operates on 1500 W of power and is used for 30 minutes. How
much electrical energy, in kW. h, is used by the microwave oven?
Answer:
i think the answer is 50 kW.h
Ibp, merch link in bio
thank you for the free points
Answer:
love
Explanation:
Which is a true statement about a series circuit?
A.) Every part of the circuit is positively charged.
B.) The current flow through every part of the circuit is the same.
C.) The current through the circuit can take several paths.
D.) Every part of the circuit is negatively charged.
Please help, I'm on a time limit!
the answer is B your welcome
The true statement about a series circuit is: the current flow through every part of the circuit is the same. Hence, option (B) is correct.
What are series and parallel circuit?Electrical networks and two-terminal components can be linked either serially or parallelly. The electrical network that results will have two terminals and be capable of operating in either a series or parallel topology.
It depends on your point of view whether a two-terminal "thing" is an electrical network (like resistors connected in series) or an electrical component (like a resistor). In this article, a two-terminal "thing" that participates in series/parallel networks will be referred to as a "component."
Each component connected in series travels the same "electrical path" and carries the same amount of current—equal to the network's current—through it.
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The force of gravity of the sun on earth in December compared to June is ?
Answer:
Earth is slightly closer to the Sun in December than it is in June. The force of gravity is slightly smaller
Explanation:
A current of 10 A moves through a circuit that contains multiple resistors in parallel. Which statement correctly describes the current through the resistors?
The current through all of the resistors will add up to 10 A.
The current through each resistor will be 10 A.
The current will be greatest through the resistor with the highest resistance.
The current will travel only through the resistor with the least resistance.
Answer:
The current through all of the resistors will add up to 10 A.
Explanation:
why is vitual force theory? why was it discarted
Answer:
I am not very sure of the first question
The second one which is why it discarted it is that because someone named Friedrich Wohler showed that it was possible to obtain an organic compound in the laboratory.
During the process of cellular respiration, water becomes oxygen. (2 points)
True
False
Answer: False
Explanation:
Hi, I hope this helps!
During cellular respiration, glucose reacts with oxygen to produce carbon dioxide, water and energy.
Answer: False
Explanation:
A runner is jogging in a straight line at a
steady vr= 8.4 km/hr. When the runner is
L= 6.3 km from the finish line, a bird begins
flying straight from the runner to the finish
line at vb= 42 km/hr (5 times as fast as the
runner). When the bird reaches the finish
line, it turns around and flies directly back to
the runner.
Answer:
Total distance traveled by bird is 10.5 km.
Explanation:
Given that,
Velocity of runner= 8.4 km/hr
Distance = 6.3 km
Velocity of bird = 42 km/hr
Suppose, How far does the bird travel?
We need to calculate the time of bird
Using formula of time
[tex]t=\dfrac{d}{v_{b}}[/tex]
Put the value into the formula
[tex]t=\dfrac{6.3}{42}[/tex]
[tex]t=0.15\ hr[/tex]
We need to calculate the distance runner travels during time period
Using formula of distance
[tex]d=v_{r}\times t[/tex]
[tex]d=8.4\times0.15[/tex]
[tex]d=1.26\ km[/tex]
We need to calculate the distance of runner to FL
Using distance
[tex]d'=6.3-1.26[/tex]
[tex]d'=5.04\ km[/tex]
We need to calculate the net closing speed between runner and bird
Using speed
[tex]v'=v_{r}+v_{b}[/tex]
[tex]v'=8.4+42[/tex]
[tex]v'=50.4\ km/hr[/tex]
We need to calculate the time for runner and bird to meet
Using formula of time
[tex]t=\dfrac{d}{v'}[/tex]
Put the value into the formula
[tex]t=\dfrac{5.04}{50.4}[/tex]
[tex]t=0.1\ hr[/tex]
We need to calculate the distance covered by runner
Using formula of distance
[tex]d=vt[/tex]
Put the value into the formula
[tex]d=8.4\times0.1[/tex]
[tex]d=0.84\ km[/tex]
We need to calculate the distance covered by bird to runner
Using formula of distance
[tex]d=vt[/tex]
Put the value into the formula
[tex]d=42\times0.1[/tex]
[tex]d=4.2\ km[/tex]
We need to calculate the total distance
Using distance
[tex]D=6.3+4.2[/tex]
[tex]D=10.5\ km[/tex]
Hence, Total distance traveled by bird is 10.5 km.
For every ______
there is an equal and opposite ______.
a. interaction & action b. action & reaction
c. action & interaction
It's Action and Reaction
What is the displacement of the ride between 0s and 16 s?
Answer:
See attached answer.
Explanation:
To solve this we must be knowing each and every concept related to displacement and its calculations. Therefore, the ride's displacement from time t = 0 s to time t = 16 s is 16v.
What is displacement?The distance along a straight line connecting an object's original and final positions is its displacement [x].
Displacements are not always a good thing. It may also be 0 or negative. A negative displacement indicates that the item has moved away from the origin and toward the right if a positive direction is situated to the right of both the origin.
If the body's velocity at a given moment in time is 'v' m/s, then displacement may be expressed mathematically as-
v = dx /dt
dx = vdt
Integrating on both sides, we get
∫dx = ∫vdt
∫dx [x = 0 to x = x] = ∫vdt [ t = 0 to t = 16 s]
x = v [16 - 0]
x = 16v
Therefore, the ride's displacement from time t = 0 s to time t = 16 s is 16v.
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Five 6 ohm resistors are connected in parallel. Which of the following is their effective resistance?
A. 6 ohm
B. 1.2 ohm
C. 30 ohm
D. 5/6 ohm
1/Rt = 1/R1 + 1/R2 + 1/R3+ 1/R4+ 1/R5
1/Rt = 1/6+ 1/6+1/6+1/6+1/6
1/Rt = 5/6
Rt = 6/5
Rt = 1.2 ohm
so B is the answer
A doctor takes an x-ray of your body this is an example of conduction, convection, radiation?
Answer:
RadiationExplanation:
An x-ray emits radiation to see through the outer part of your body.
Hope this helps! <3
An X-ray is a type of radiation which is a type of electromagnetic radiation in the electromagnetic spectrum.
What is electromagnetic spectrum?
The electromagnetic spectrum consists of electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.
The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.
In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.There are 7 types of electromagnetic radiation in the electromagnetic spectrum.Gamma rays have the highest energy while radio waves have least energy.
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A car travels at 15 m/s for 30 minutes. How far did it travel?
Answer:
27000 meters
Explanation:
15 x 60 x 30
Acceleration
A car traveling to the right speeds up from Okm/h to 50km/h in 8s. Convert the time from seconds to minutes.
Explanation:
Initial speed, u = 0 km/h
Final sped, v = 50 km/h
Time, t = 8 s
1 minute = 60 seconds
⇒ 1 s = (1/60) minutes
⇒8 s = 0.1334 minutes
Acceleration,
[tex]a=\dfrac{v-u}{t}\\\\a=\dfrac{50\cdot\dfrac{5}{18}}{8}\\\\a=1.73\ m/s^2[/tex]
Hence, this is the required solution.
Find the momentum
of a
30g ball traveling
12 m/s
Answer:
0.36 kgm/s
Explanation:
Formula for momentum is :
P=mv
p is momentum
m is mass = 30g = 0.03kg
v is velocity = 12 m/s
P= 0.03 x 12
P = 0.36 kgm/s
The north pole of a bar magnet is moved close to the north pole of a second bar magnet. What prediction best describes how the first magnet responds when it is released? It will move toward the second magnet because like poles repel. It will move toward the second magnet because like poles attract. It will move away from the second magnet because like poles repel. It will move away from the second magnet because like poles attract.
Answer:
C. It will move away from the second magnet because like poles repel.
Explanation:
Answer:
C
Explanation:
Which of the following is a unit of volume in the English system of measurement? (4 points)
Meters
Gallons
Liters per cubic gram
Kilograms per cubic centimeter
Answer:
Explanation:
the answer is gallons because i got it right on the exam
