Answer:
100m
Explanation:
Equation of motion for he truck: s=ut
Equation of motion for the car: s=1/2at^2
the second solution gives , s=2u^2/a = 2*10^2/2 = 100m
If you double the size of the larger pad of a hydraulic system, how much less force do you need to apply to the smaller pad to achieve the same result?
A. 1/4 the force
B. 1/2 the force
C. 1/3 the force
D. The same amount of force
Answer:
A - ¼ of the force
Explanation:
According to Pascal’s principle, there's an equation that relates the force to area ratios in hydraulic systems, provided that the pistons will be at the same vertical height and that the friction in the given hydraulic system is negligible. This formula is;
F1/A1 = F2/A2
Thus;
F1/F2 = A1/A2
Where F is the applied force and A is area of pad.
Now, we are told that the size of the pad is doubled. Thus;
If the initial radius is r, then the new radius is 2r
Thus;
F1/F2 = (πr²)/(π(2r)²)
F1/F2 = r²/4r²
F1/F2 = ¼
F1 = ¼F2
Thus, the answer is ¼ of the force
If Benjamin skated 80 kilometers at 10 kilometers per hour, how long was Benjamin skating? Express your answer in minutes
A: 240 minute
B: 480 minutes
C: 180 minute
Answer:
480
Explanation:
first simplefie 80 ÷10
now
8x 60
480
A constant voltage of 11.00 V has been observed over a certain time interval across a 1.20 H inductor. The current through the inductor, measured as 1.00 A at the beginning of the time interval, was observed to increase at a constant rate to a value of 7.00 A at the end of the time interval. How long was this time interval
Answer:
0.65 sec
Explanation:
V = L*ΔI/Δt
so Δt = L*ΔI/V = 1.20 * (7.00 - 1.00)/11.00 = 0.65 sec
When using the thin lens equation, what explains why the value for the focal length of a given lens doesn't change?
The object and image distance change inversely, but in the same ratio.
The specific material and shape of each lens determines how it refracts light rays.
The object and image distance always change in direct proportion.
The focal length is a universal constant.
Answer:
The specific material and shape of each lens determines how it refracts light rays.
Answer:
D) The specific material and shape of each lens determines how it refracts light rays.
Explanation:
The specific material and shape of each lens determines how it refracts light rays. Since the index of refraction for the material and its specific shape determine how it bends light, the focal length for a given lens doesn't change. If you change the position of the object, the distance of the image will change inversely, but not in given ratio.
hope it helps:)
Cameron and Morgan are each holding a bar magnet with opposite poles facing each other. They walk in opposite directions until they stop feeling their magnet pull towards the other one What can they conclude about the distance between them when they stop feeling their magnets pull?
A. They are outside the magnetic field of their magnets.
B. The distance made the magnets' force stronger.
C. The magnetic field was weaker when they were close.
D. The magnetic fields are far enough apart to change direction.
Answer:
a.
Explanation:
i did a quizz for it im sorry if im wrong
A tennis player hits a ball 2.0 m above the ground.
The ball leaves his racquet with a speed of 25.0
m/s at an angle 5.2° above the horizontal. The
horizontal distance to the net is 7.0 m, and the net
is 1.0 m high. By how much does the ball clear the net?
Explanation:
initial height, yo = 2 m
initial velocity, u = 20 m/s
angle of projection,θ = 5 degree
distance of net = 7 m
height of net = 1 m
Let it covers a vertical distance y in time t .
Use Second equation of motion for vertical motion
As it hits the ground in time t, so put y = 0
Taking positive sign, t = 0.84 s
The ball travels a horizontal distance x in time t
X = 20 Cos5 x t
X = 16.76 m
As this distance is more than the distance of net, so it clears the net.
Let t' be the time taken to travel a horizontal distance equal to the distance of net
7 = 20 cos5 x t'
t' = 0.35 s
Let the vertical distance traveled by the ball in time t' is y'.
So,
y' = 2.008 m
So, it clears the net which is 1 m high.
It clears the net by a vertical distance of 2.008 - 1 = 1.008 m and horizontal distance 16.76 - 7 = 9.76 m
your welcome, and have a great day.
How often a wave occurs is the waves _____
Answer: frequency
The frequency of a wave is how much times a wave passes through a given spot/point.
So, the answer is frequency. Frequencies have wavelengths that can be different colors.
CAN SOMEONE PLS HELP ME!
Which is the best reason Venus' temperature is approximately uniform, hot on both day and night sides?
plate tectonics
retrograde rotation
atmospheric convection
planetary differentiation
differential rotation
The main reason Venus has a "uniform" temperature is atmospheric convection.
What is atmospheric convection?Atmospheric convection is a term to refer to the difference in temperature, in the atmospheric layer. In short, it refers to the movement of air bodies of different temperatures in the atmosphere of a planet.
In the case of Venus, atmospheric convection contributes to this planet's temperature uniformity because hot air is in constant contact with the planet's surface, preventing it from cooling.
Learn more about temperature in: https://brainly.com/question/7510619
what's the toughest animal in the world
Answer:
In explanation
Explanation:
Toughest animal existing now would be like a bear more specifically a grizzly bear. I say this because when your near this animals and your messing with it or it's cubs your more than likely dead you climb up a tree,did you forget they can climb to,when running a grizzly bear can get up to a max speed of 35 MPH, Now the grizzly bear isn't the most aggressive but is still one of the rulers of bears along with it's relative the polar bear,but when you are talking about pain they can't take pain shoot them it takes more than 1 show better have a machine gun or be able to run fast a knife isn't going to do a lot in less you get it in it's eye. Now for a grizzly bear you can play dead and he will fall for it or she but all you need to know is don't mess with it.
Another one of the toughest animal is a komodo dragon.
When were talking about a komodo dragon there like a human they way up to 170 LBS to 200 LBS they have a length of 8 foot and a half. Now komodo dragons are very friendly and can be a family pet but if that thing bites you,you will be dead within hours in less treated amindentally. The komodo dragon can kill water buffalos, and the komodo dragon has no predators. The komodo dragon is the biggest lizard in the world and is poisonous so that is a reason to not get around with, one time a komodo dragon killed an eight year old boy so not really friendly.
is there anymore things you want my opinion on on actually the real deal.
would you like to know most aggressive,
most dangerous,
most poisonous,
The most feared
the most loving
The biggest animal in the world
The most friendly or other just let me know:)
Hope it helps have a great afternoon:)
Does Mike wosowski blink or wink
Ms. Haddox was hiking in the Grand Canyon. She traveled 61 meters in 647 seconds then she traveled 9 meters in 852 seconds, and on the third leg of the hike she traveled 32 meters in 805 seconds. What is the average speed of Ms. Haddox during her hike?
Answer:
45
Explanation:
How are gases different from solids and liquids?
Answer: All of these states of matter have atoms, molecules, etc. Gases have their molecules all spread out and are not confined to one spot. Liquids and solids both have their molecules in a specific place. For liquid, water, and for solids, an example could be ice. Solids such as ice are tightly packed together and can not move much. Liquids are not packed together as much as solids.
Sorry for the dull explanation.
Explanation:
A force of 20N acts upon of 5 kg. Calculate the acceleration of the object.
Answer:
Acceleration= 4 m/s
Explanation:
F = ma
20 N = (5kg)(a)
4m/s = a
Assume that a person bouncing a ball represents a closed system. Which statement best describes how the amounts of the ball's potential and kinetic energy change? O A. The ball's potential energy decreases as it rises and its kinetic energy increases. B. Both the kinetic and potential energy of the ball increase. O C. The ball's kinetic energy increases as it falls and its potential energy decreases. O D. Both the kinetic and potential energy of the ball decrease.
Answer:
I believe the answer is C.
Answer:
C. The ball's kinetic energy increases as it falls and its potential energy decreases.
What are civic responsibilities? (2 points)
a
The responsibilities we have at home
b
The responsibilities we have as part of a democratic society
c
Responsibilities that are reserved for state governments
d
Freedoms that are protected by law
Answer: B
Explanation:
100%
Answer: The answer is b
Explanation: And a brain list please
a point charge q is held stationary at the origin, its electric potential of 2.8 x 10^4 V is measured at 1.1m away from the point charge. what is the magnitude of the point charge q
The magnitude of the point charge held stationary at the origin and at given electric potential is determined as 3.42 x 10⁻⁶ C.
Magnitude of the charge
The magnitude of the charge held stationary at the origin is calculated as follows;
V = kq/r
where;
k is Coulomb's constant = 9 x 10⁹ Nm²/C²q is the magnitude of the charge = ?r is the distance of separation = 1.1 mSubstitute the given parameters into the above equation and solve magnitude of the point charge.
kq = Vr
q = Vr/k
q = (2.8 x 10⁴ x 1.1)/(9 x 10⁹)
q = 3.42 x 10⁻⁶ C
Thus, the magnitude of the point charge held stationary at the origin and at given electric potential is determined as 3.42 x 10⁻⁶ C.
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You have been hired by a "storm chaser" as an assistant. This individual loves to find locations at which tornadoes and violent lightning storms are occurring. While there, he takes photographs and makes electromagnetic measurements. You are on a chase with him to a lightning storm in Florida. He explains to you that a cloud layer and the ground can be considered as the plates of a capacitor that stores charge, with the ground being charged negatively. The capacitor continuously leaks charge due to the free charges in the air between the plates. In thunderclouds, however, various processes result in charge distributions that eventually lead to lightning, a phenomenon that delivers negative charge to the ground. Therefore, the lightning recharges the capacitor. Ahead of you is a cloud layer that the storm chaser measures to be of area 2.00 km2 and height 10 km above the ground. He then uses a special apparatus called a field mill to measure that the electric field under the cloud is 4.00 â 10^6 N/C.
He asks you to do a quick calculation of the charge on the cloud-ground capacitor (in C), so you can know what to expect if there is a bolt of lightning.
Answer:
The value is [tex]q = 70.8\ C[/tex]
Explanation:
From the question we are told that
The area is [tex]A = 2.0 \ k m^2 = 2000000 \ m[/tex]
The height is [tex]h = 10 \ km = 10000 \ m[/tex]
The electric field is [tex]E = 4.0*10^{6} \ N/C[/tex]
Generally the electric field is mathematically represented as
[tex]E = \frac{q}{A * \epsilon_o }[/tex]
Here [tex]\epsilon_o }[/tex] is the permitivity of free space with value
[tex]\epsilon_o } = 8.85 *10^{-12} \ N \ m^2 /C^2[/tex]
=> [tex]4.0*10^{6} = \frac{q}{2000000 * 8.85 *10^{-12} }[/tex]
=> [tex]q = 70.8\ C[/tex]
In an emergency, a driver brings a car to a full stop in 5.0s. The car is traveling at a rate of 38m/s when the breaking begins.
(a) At what rate is the car decelerated?
(b) How far does the car travel before it stops?
(a) By definition of average acceleration,
a = ∆v / ∆t = (0 - 38 m/s) / (5.0 s)
a = -7.6 m/s²
(b) Recall that
v² - u² = 2 a ∆x
where u and v are initial and final velocities, respectively; a is acceleration; and ∆x is the change in position. So
0² - (38 m/s)² = 2 (-7.6 m/s²) ∆x
∆x = 95 m
A 8-kg object is moving with a speed of 5 m/s at a height of 4 m. The kinetic energy of the object is approximately ____ J. *
Answer: 100J
Explanation: K = 1/2mv^2
m=8
v=5
1/2 * 8 * 5^2
1/2 * 8 * 25
4 * 25
100
If a boy weighs 490 N and stands on a flat rough surface with a
coefficient of static friction Hs=0.68, then what is the force of
static friction acting on the boy?
a ON
b 434 N
C 507 N
d 333 N
Check it
The force of static friction acting on the boy is 333 Newtons.
Hence, option (d) 333N is the correct answer.
Given the data in the question;
Weight of boy; [tex]F_n = 490N[/tex]Coefficient of static friction; [tex]u_s = 0.68[/tex]Force of static friction acting on the boy; [tex]F_s = \ ?[/tex]
FrictionFriction is simply referred as the resistance an object experience when moving or trying to move over another object. It can either by dynamic or static.
Static friction is the resistance experienced by a body at rest.
Coefficient of friction is the measure of how easily a body moves in relation to the other.
Static friction is expressed as;
[tex]F_s = u_s * F_n[/tex]
Where [tex]F_s[/tex] is the normal force and [tex]u_s[/tex] is the coefficient of static friction.
We substitute our given values into the equation above
[tex]F_s = u_s * F_n\\\\F_s = 0.68 * 490N\\\\F_s = 333.2N\\\\F_s = 333N[/tex]
The force of static friction acting on the boy is 333 Newtons.
Hence, option (d) 333N is the correct answer.
Learn more friction: https://brainly.com/question/17237604
How much would a 10 kg suitcase weigh on the surface of…?
What do the magnetic field lines on a bar magnet look like?
A. The lines start in the middle of the magnet and loop around to the poles.
B. The lines start at the poles and loop to the middle of the magnet.
C. The lines run parallel to the magnet but never touch it.
D. The lines start at the north pole and loop around to the south pole.
Answer
A is the correct answer
Explanation:
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How does the magnitude of the electrical charge on objects affect the
electric force between them? *
As the charge increases, the force decreases in strength
As the charge increases, the force becomes more negative
As the charge increases, the force increases in strength
Answer:
As the charge increases, the force decreases in strength
Explanation:
Experiments with electric charges have shown that if two objects each have electric charge, then they exert an electric force on each other. The magnitude of the force is linearly proportional to the net charge on each object and inversely proportional to the square of the distance between them...
Answer: The correct answer is: As the charge increases, the force increases in strength
Explanation:
Its kind of the obvious answer and other people don't know how to answer correctly. This was years ago but if anyone needs the answer today then here it is....
what's the biggest animal ever
Blue whale was the biggest animal ever
Hope that helped!
PLEASE HELP QUICK
Engines transform the energy in fuel into mechanical energy, heat, and sound.
Why is some of the energy in fuel always transformed into heat?
A.It is possible to build an engine that runs without heating up, but it would be expensive.
B. It is not possible to build an engine that runs without heating up.
C.It is possible to build an engine that runs without heating up, but technology has not advanced enough for it yet.
D.Engines can run cold, but it damages the engine. Most engines are heated up for this reason.
Answer:
B.
Explanation:
it is impossible to make an engine work without heating up because there is friction plus I took the test
Answer:It is not possible to build an engine that runs without heating up.
Explanation:
Which of the following statements is accurate
Answer:
A is the answer
Explanation:
Good luck!!
A wire segment 1.2 m long carries a current I = 3.5 A and is oriented as shown in the figure. A uniform magnetic field of magnitude 0.50 T pointing toward the -x direction is present as shown. The +z-axis points directly into the page. What is the magnetic force vector on the wire segment?
Answer:
-1.61 k (N)
Explanation:
L = 1.2 m, I = 3.5 A, B = 0.50 T, α = 40°
F = I L x B (cross product)
F = I L(sinα i - cosα j) x B (-i)
= -IBLcosα k
= -3.5 * 0.50 * 1.2 * cos40 k
= -1.61 k (N)
A force of 58 N is applied to re-create at an angle of 32° with the horizontal what is the value of force acting in the wyddd direction
A. 15.7 N
B. 30.7 N
C. 39.5 N
D. 49.2 N
A grasshopper is an insect that goes through three distinct stages during its life cycle. The life cycle of a grasshopper is an example of which one of the following?
A. Quick metamorphosis
B. Slow metamorphosis
C. Complete metamorphosis
D. Incomplete metamorphosis
Answer:
B is the answer bc it's no way c an a and d can maybe c