Answer:
A) a = 7.89 m/s²
B) a = 3.51 m/s²
C) 4.38 m/s²
D) Frictional force
E) F_f = 5552.83 N
Explanation:
A) Formula for Force is;
F = ma
Where;
m is mass
a is acceleration
We are given;
F = 10,000 N
m = 1267 kg
Thus;
10000 = 1267a
a = 10000/1267
a = 7.89 m/s²
B) We are told the car covers 394.6 m in 15 seconds.
Using Newton's third equation equation of motion, we can find the actual acceleration.
s = ut + ½at²
u is zero since the object began from rest.
Thus;
S = ½at²
394.6 = ½ × a × 15²
a = 394.6 × 2/225
a = 3.51 m/s²
C) difference in accelerations = 7.89 - 3.51 = 4.38 m/s²
D) The force that caused the difference in acceleration is frictional force
E) To find the magnitude of the force that caused the difference in acceleration, we will use the formula;
F - F_f = ma
F_f = F - ma
Where F_f is the frictional force
Thus;
F_f = 10000 - 1267(3.51)
F_f = 5552.83 N
Help!!! Please need it fast. If correct I’ll give b
Answer:
if bother parents have brown eyes but they carry the allele for blue eyes a quarter of the kids will have blue eyes and three quarters will have brown eyes. hope this help I'm sorry if it doesn't.
An electron (e = 1.6 x 10-19 C) is traveling at 4.00 x 107 m/s due North in a horizontal plane through a point where the earth’s magnetic field has a component to the North of 2.00 x 10-5 T and a downward (in to the earth) of 5.00 x 10-5 T. Calculate the magnetic force (magnitude and direction) on the electron and its acceleration. Me = 9.11 x 10-31 kg
Answer:
Explanation:
Force on the electron due to magnetic field 's north component will be zero because both velocity of electron and direction of magnetic field are same .
Force due to downward component of magnetic field
= B q v where B is magnetic field , q is charge moving and v is velocity of charge
F = 5 .00 x 10⁻⁵ x 1.6 x 10⁻¹⁹ x 4 x 10⁷
= 32 x 10⁻¹⁷ N
acceleration = F / m where m is mass of electron
= 32 x 10⁻¹⁷ / 9.11 x 10⁻³¹
= 3.5 x 10¹⁴ m/s²
Two harmonic waves moving in the same direction are described by y1(x,t)=10.2sin(4x-700t) and y2(x,t)=10.2sin(4x-700t-7.9). What is the amplitude of the resultant wave at interference
Answer:
14.42 units
Explanation:
The waves are given as follows :
[tex]y_1(x,t)=10.2\sin(4x-700t)\\\\y_2(x,t)=10.2\sin(4x-700t-7.9)[/tex]
We need to find the amplitude of the resultant wave at interference. Let it be A. So,
[tex]A=\sqrt{10.2^2+10.2^2} \\\\=14.42\ units[/tex]
So, the amplitude of the resultant wave is equal to 14.42 units.
A graph here shows the displacement of two walkers over time. Waliper 1 is graphed in red while walker 2 is graphed
in blue. Which statements are supported by the information in the guaph? Select ALL that apply.
)
Α)
Both walkers had the same speed overall.
B)
Walker 2 was at rest for the first five seconds.
C)
Walker 1 moved faster overall than walker 2 by the end.
D)
Walker 2 moved faster overall than walker 1 by the end.
E)
Both walkers had reached the same distance at fifteen seconds.
Answer:
B) Walker 2 was at rest for the first five seconds. D) Walker 2 moved faster overall than walker 1 by the end. E) Both walkers had reached the same distance at fifteen seconds.
Explanation:
I did the UsaTestPrep
Using Ohms Law, calculate the current that would exist in a circuit having a voltage of 240V experiencing 110 Ohms of resistance
To find the Voltage, ( V ) [ V = I x R ] V (volts) = I (amps) x R (Ω)
To find the Current, ( I ) [ I = V ÷ R ] I (amps) = V (volts) ÷ R (Ω)
To find the Resistance, ( R ) [ R = V ÷ I ] R (Ω) = V (volts) ÷ I (amps)
To find the Power (P) [ P = V x I ] P (watts) = V (volts) x I (amps)
Define the types of friction and give FOUR examples of each
Static Friction
Rolling Friction
Sliding Friction
Fluid Friction
Answer:
Static Friction - acts on objects when they are resting on a surface
Sliding Friction - friction that acts on objects when they are sliding over a surface
Rolling Friction - friction that acts on objects when they are rolling over a surface
Fluid Friction - friction that acts on objects that are moving through a fluid
Explanation:
Examples of static include papers on a tabletop, towel hanging on a rack, bookmark in a book , car parked on a hill.
Example of sliding include sledding, pushing an object across a surface, rubbing one's hands together, a car sliding on ice.
Examples of rolling include truck tires, ball bearings, bike wheels, and car tires.
Examples of fluid include water pushing against a swimmer's body as they move through it , the movement of your coffee as you stir it with a spoon, sucking water through a straw, submarine moving through water.
Two small nonconducting spheres have a total charge of 94.0 μC . Part A
When placed 31 cm apart, the force each exerts on the other is 11.5 N and is repulsive. What is the charge on each?
Q1,Q2=
Part B
What if the force were attractive?
Q1,Q2=
Answer:
Part A;
The charges are;
Q₁ = 1.32687 μC and Q₂ = 92.67313 μC
Part B
Q₁ = 95.29042 μC, Q₂ = -1.29042 μC
Explanation:
Part A
The total charge on the two nonconducting spheres = 94.0 μC
The force exerted by each on the other when placed 31 cm apart = 11.5 N
Let Q₁ = x represent the charge on one of the spheres and let Q₂ represent the charge on the other sphere
The force, 'F', exerted by a charge is given as follows;
[tex]F = k \times \dfrac{\left | Q_1 \right | \cdot \left | Q_2 \right | }{d^2}[/tex]
Where;
d = The distance between the spheres = 31 cm = 0.31 m
k = 8.9875 × 10⁹ N·m²/C²
Where F = 11.5 N
Q₁ + Q₂ = 94.0 μC
∴ Q₂ = 94.0 - Q₁ = 94.0 - x
We get;
[tex]F =11.5 = 8.9875 \times 10^9 \times \dfrac{x\times (94.0-x) \times 10^{-12}}{0.31^2}[/tex]
Therefore;
94·x - x² - 122.965 = 0
x² - 94·x + 122.965
x = (94 ± √((-94)² - 4×1×122.965))/(2 × 1)
Solving gives;
x ≈ 1.32687 × 10⁻⁶ C or x = 92.67313 × 10⁻⁶ C
Therefore, the charges are;
Q₁ = 1.32687 × 10⁻⁶ C and Q₂ = 92.67313 × 10⁻⁶ C
Q₁ = 1.32687 μC and Q₂ = 92.67313 μC
Part B
For attractive force, we have;
Q₁ + Q₂ = 94 × 10⁻⁶...(1)
[tex]11.5 = 8.9875 \times 10^9 \times \dfrac{-x\times (94.0-x)}{0.31^2} = 8.9875 \times 10^9 \times \dfrac{-Q_1\times Q_2}{0.31^2}[/tex]
-Q₁ × Q₂ = 11.5 × 0.31²/(8.9875 × 10⁹) = 1.2296523 × 10⁻¹⁰...(2)
∴ Q₂ = -1.2296523 × 10⁻¹⁰/(Q₁)
Q₁ + Q₂ = Q₁ - 1.2296523 × 10⁻¹⁰/(Q₁) = 94 × 10⁻⁶
Q₁² - 94 × 10⁻⁶·Q₁ - 1.2296523 × 10⁻¹⁰ = 0
∴ Q₁ = (94 × 10⁻⁶ ± √((-94 × 10⁻⁶)² - 4 × 1 × 1.2296523 × 10⁻¹⁰))/(2×1)
Q₁ = 9.529042 × 10⁵ C or -1.29042 × 10⁻⁶ C
Therefore, Q₁ = 9.529042 × 10⁵ C and Q₂ = -1.29042 × 10⁻⁶ C
Q₁ = 95.29042 μC and Q₂ = -1.29042 μC
Which of the following is a characteristic of a mechanical wave but not a characteristic of an electromagnetic wave?
Mechanical waves have a crest but no trough is a characteristic of a mechanical wave but not a characteristic of an electromagnetic wave.
What is an electromagnetic wave?The waves that are related to both electricity and magnetism are known as electromagnetic (EM) waves. These waves are made up of time-varying electric and magnetic fields that travel over space.
Mechanical waves have a peak but no dip, which is a mechanical wave characteristic but not an electromagnetic wave characteristic.
Hence, mechanical waves have a crest but no trough is a characteristic of a mechanical wave but not a characteristic of an electromagnetic wave.
To learn more about the electromagnetic wave refer to the link;
https://brainly.com/question/8553652
#SPJ1
What is another term for a pull on an object? O A. Acceleration O B. Speed O c. Force O D. Velocity
Answer:
Acceleration
Explanation:
What current flows through a 15 ohm fixed resistor when it operates on a 120-volt outlet?
Answer: current is 8.0 A
Explanation: R= U/I I = U/R = 120 V/15 Ω= 8.0 A
Earth's plates move slowly across its surface. What will result when two
plates carrying continental crust collide?
Mountains will fall
A valley will be created
All land faults on Earth will be affected.
One plate will be subducted back into the mantle.
A baseball is struck home plate and acquires a speed of 60m/s. It rises to a height of 100.0 m above its starting level. Find its speed at the height
Answer:
40 m/s.
Explanation:
From the question given above, the following data were obtained:
Initial velocity (u) = 60 m/s
Height (h) = 100 m
Acceleration due to gravity (g) = 10 m/s²
Final velocity (v) =?
The velocity at height 100 m can be obtained as follow:
v² = u² – 2gh (since the ball is going against gravity)
v² = 60² – (2 × 10 × 100)
v² = 3600 – 2000
v² = 1600
Take the square root of both side
v = √1600
v = 40 m/s
Thus, velocity at height 100 m is 40 m/s
2. Find the electrostatic force between two protons that are 2.0 m apart. The elementary charge of
a proton is 1.602 x 10-19 C.
Answer:
the electrostatic force between the two protons is 5.775 x 10⁻²⁹ N.
Explanation:
Given;
charge of protons, q = 1.602 x 10⁻¹⁹ C
distance between the two charges, r = 2.0 m
The electrostatic force between the two protons is calculated as;
[tex]F = \frac{kq^2}{r^2}[/tex]
where;
k is coulomb's constant, = 9 x 10⁹ Nm²/C²
[tex]F = \frac{(9\times 10^9)(1.602 \times 10^{-19})^2}{(2)^2} \\\\F = 5.775 \times 10^{-29} \ N[/tex]
Therefore, the electrostatic force between the two protons is 5.775 x 10⁻²⁹ N.
The force between the two protons separated by the distance of 2 m will be [tex]F=5.775\times 10^{-29}\ N[/tex]
What is coulomb's force?The coulomb's force is defined as when two charged particles are separated by the distance r and having charge q then the force will be directly proportional to the product of the charges and inverse to the distance between them.
The coulomb's force will be given by
[tex]F=\dfrac{kq_1q_2}{r^2}[/tex]
Here it is given that
Charge on the proton=[tex]q=1.602\times 10^{-19}\ C[/tex]
The distance between protons = 2 m
The value of constant [tex]k=9\times 10^{-29}\ \dfrac{Nm^2}{C^2}[/tex]
Putting the values in the formula
[tex]F=\dfrac{(9\times 10^9) (1.602\timeds 10^{-19}^)^2}{2^2}[/tex]
[tex]F=5.775\times 10^{-29}\ N[/tex]
Hence the force between the two protons separated by the distance of 2 m will be [tex]F=5.775\times 10^{-29}\ N[/tex]
To know more about coulomb's law of forces follow
https://brainly.com/question/506926
You serve a volleyball with a mass of 2.5 kg. The ball leaves your hand with a speed of 23 m/s. What is the kinetic energy of the ball?
Answer:
661.25, I believe!
Explanation:
KE = (1/2)(2.5)(23)^2
KE=(1.25)(529)
KE= 661.25
Explain why a person cannot dive in the Mariana Trench in the Pacific Ocean to a depth of approx. 11,000 m without appropriate protective equipment
Answer:
Plzzzz answer fast......
16. A strong acid has a pH close to 7
A.True
B.False
Answer:
I think it's true.
Hope this helps .
Explanation:
The pH scale measures how acidic or basic a substance is. The pH scale ranges from 0 to 14. A pH of 7 is neutral. A pH less than 7 is acidic.
I need help plzz help I’ll mark you brainliest
Answer:
a b c d
Explanation:
Given the height of rod,length of shadow of tree and length of shadow of the rod, estimate the height of the tree? Given:height of rod=150cm,Length of shadow of the rod=120cm and length of shadow of the tree =800cm
Answer:
1000 cm.
Explanation:
To obtain the estimated tree height :
(Height of rod / length of rod shadow) = (height of tree / length of tree shadow)
Substituting values into the formula :
(150cm / 120 cm) = (height of tree / 800 cm)
Using cross multiplication :
Height of tree * 120 = 150 * 800
Height of tree = (150 * 800) / 120
Height of tree = 120,000 / 120
Height of tree = 1000
Hence, estimate height of tree = 1000 cm
The star Betelgeuse is 6.1 x 10^18 m away from Earth. How old is the light we see from that star when it reaches us? There are 3.2 x 10^7 seconds in a year (1 point)
635 years old
481 years old
727 years old
559 years old
Answer:
635 years old
Explanation:
The light reaching the earth from the sun will travel at a speed called the speed of light, and this has a universal value of 3 × 10⁸ m/s. Bearing this in mind, let us calculate the age of the light reaching the Earth from the sun:
Distance of star from Earth = 6.1 × 10⁸m
Speed of light = 3 × 10⁸ m/s
We have distance and speed, let us calculate the time of travel of the light from the star to the earth.
Distance = speed × time
6.1 × 10⁸ = 3 × 10⁸ × time
[tex]time = \frac{6.1 \times 10^{18}}{3 \times 10^8}[/tex]
In order to do the division above, we will divide the whole numbers normally, then we will apply the law of indices to the power that says:
Xᵃ ÷ Xᵇ = X⁽ᵃ⁻ᵇ⁾
[tex]\therefore time = \frac{6.1 \times 10^{18}}{3 \times 10^8}\\= \frac{2.03 \times 10^{(18-8)}}{1} \\= 2.03 \times 10^{10}}\ seconds[/tex]
Next, we are told that there are 3.2 × 10⁷ seconds in a year.
∴ The number of years travelled by the light from the star:
[tex]3.2\ \times 10^7\ seconds = 1\ year\\1\ second = \frac{1}{3.2\ \times 10^7} \\\therefore 2.03 \times 10^{10}\ seconds = \frac{2.03 \times 10^{10}}{3.2\ \times 10^7}[/tex]
please note that:
2.03 × 10¹⁰ = 20300000000
3.2 × 10⁷ = 32000000
[tex]\therefore \frac{2.03 \times 10^{10}}{3.2\ \times 10^7}\\= \frac{20300000000}{32000000} \\\\= \frac{20300}{32} \\= 634.347\ years\\[/tex]
The closest answer in the option is 635 years, and we are short of this by some points due probably to approximations in the calculation.
Which characteristic should a good scientific question have?
It should lead to a hypothesis that is testable.
It should have an answer that is already known.
It should not be answerable just through investigation.
It should include many variables about a wide range of topics.
The characteristic that a good scientific question should have is that it should lead to a testable hypothesis. This means that the question should be specific enough to allow for the formulation of a testable hypothesis that can be supported by empirical evidence.
What is another characteristic of a good scientific question?A good scientific question should also be relevant to the field of study and potentially contribute to our understanding of a phenomenon. The answer to the question doesn't need to be already known, and it may not be answerable just through investigation.
What is the empirical evidence?Empirical evidence is the information or data obtained through observation, measurement, and experimentation. The evidence is based on direct or indirect observations of the natural world, as opposed to assumptions, beliefs, or opinions.
To learn more about experiment, visit here:
https://brainly.com/question/30055326
#SPJ1
The complementary color of blue is?
Answer:
I think it's red so yeah hdjjdbebe
Why are bases of pillars of bridge
made broad?
Answer:
to lower the centre of gravity
Explanation:
Which of the following best describes why tidal energy is considered a renewable energy resource? A. The Moon receives energy from the Sun, which is a renewable resource. B. Humans can create more tidal energy by setting up more tidal energy plants. C. Ocean water will never be exhausted. D. Tidal energy is replaced naturally by the Moon's gravity.
Answer:
D. Tidal energy is replaced naturally by the Moon's gravity.
Explanation:
The reason tidal energy is considered a renewable energy resource is that Tidal energy is replaced naturally by the Moon's gravity. The Moon's gravity creates bulges on the side of Earth that is closest and farthest from the Moon. These bulges also pull water causing high tides in those areas. As the Earth rotates these areas experience low tide while the areas that had low tide now experience high tide. This constant shift creates tidal energy every day, which is replenished naturally.
list down the different phases of the Moon
Answer:
new Moon.
waxing crescent Moon.
first quarter Moon.
waxing gibbous Moon.
full Moon.
waning gibbous Moon.
last quarter Moon.
waning crescent Moon.
Explanation:
Answer:
NEW MOON
WAXING CRESCENT
FIRST QUARTER
WAXING GIBBOUS
FULL MOON
THIRD QUARTER
WANING GIBBOUS
WANING CRESCENT
Explanation:
HOPE IT HELPS
A rock with a mass of 6 grams has greater thermal energy than a rock with a mass of 7 grams. True or false?
Answer:
Explanation:
False
Which direction will thermal energy flow if you pick up a snowball with your bare hand? Thermal energy will flow from the snowball to your hand. Thermal energy will flow from your hand to the snowball. Thermal energy will not flow between your hand and the snowball.
Answer:
b. Thermal energy will flow from your hand to the snowball.
Explanation:
Answer:
B
Explanation:
A watch costs Rs. 8136 when it is 10% discounted and 13%
VAT is added then find out discount and VAT amount? By
how much percentage VAT amount is more than discount
amount.
Ans: 17%
Explanation:
lanat kabool kar
2. The force between charges is 7 N. The distance between the charges is 4 x 10-6 m. If one of the charges is 2 x 10-8 C, what is the strength of the other charge?
3. A pair of equal charges are separated by .75 m. There's a 2500 N force acting on them. What is the strength of the charge?
Plz help!!!!!!
Answer:
2) 6.22 × 10^-13
3) 4.56 × 10^-4
Explanation:
Which electromagnetic waves have the longest wavelength and lowest frequencies?
O infrared waves
O ultraviolet rays
O radio waves
O gamma rays
Answer:
gamma rays
Explanation:
they have longer wave lengths than the others
A rod is given a charge of +16.7 UC, how many extra protons does It contain?
Answer:
We know that the electronic charge is 1.6 E-19 coulombs
Therefore 1 coulomb of charge contains 1.6 E19 electrons
A charge of 16.7 E6 coulombs therefore contains
N = 16.7 E6 * 1.6 * E-19 = 2.67 E-12 electrons
Also, the charge on the proton equals that on the electron