Answer:
Explanation:
When a player throws a football , he applies force on the ball , due to which ball accelerates in forward direction . This is the action force .
The ball also applies a force on the hand of the player . Due to it the player experiences a pushing force in backward direction . This is reaction force .
Due to this force , the player does not move in backward direction because of frictional force of the ground . The frictional force keeps him stationary .
An electromagnetic wave is composed of electrical and magnetic energy.
Please select the best answer from the choices provided
T
F
Answer:
the answer is T!!
!!!!!!!!
Answer:
true
Explanation:
hope this helps
If two 1000kg cars have a gravitational force of 1.067x10^-5 N towards each other, how far apart are they?
Answer:
6.25m
Explanation:
Given parameters:
Masses of the car = 1000kg
Gravitational force = 1.067 x 10⁻⁵N
Unknown:
Distance between them = ?
Solution:
To solve this problem, we use the expression below from the universal gravitational law;
Fg = [tex]\frac{G x mass 1 x mass 2}{distance^{2} }[/tex]
G = 6.67 x 10⁻¹¹
1.067 x 10⁻⁵ = [tex]\frac{6.67 x 10^{-11} x 1000 x 1000 }{d^{2} }[/tex]
d = 6.25m
please help, thank you !
Answer:
0.04658 m from the nut
Explanation:
Recall that torque is defined as the vector product of force (F) times distance (d). Then, given that the force is applied perpendicular to the wrench, gives the sine of the angle (90 degrees) equal to 1, simplifying the calculation which consists basically on solving for d in the equation:
2.25 N*m = 48.3 N * d
d = 2.25 /48.3 m ≈ 0.04658 m
A problem at work must be handled the same way as a personal conflict.
Please select the best answer from the choices provided.
ОТ
F
Answer:T
Explanation:
i feel like it doesn't have enough info
PLEASE HELPP
Look at the picture
Marina walked 2km in half an hour, what was her average speed during her walk?
Answer:
4km/hr
Explanation:
An aeroplane of mass 30000kg produced a force of 20kN to get it to accelerate to 50m/s so it could take off. Calculate the amount of time it was accelerating for
Will mark branliest! Need working out aswell!
Answer:
[tex]75\:\mathrm{seconds}[/tex]
Explanation:
The impulse-momentum theorem states that the impulse of an object is equal to the change in momentum of that object:
[tex]\Delta p=m\Delta v[/tex].
Impulse is also given by [tex]F\Delta t[/tex] where [tex]F[/tex] is the average net force and [tex]\Delta t[/tex] is change in time.
Therefore, we can set both equations equal to each other and solve:
[tex]\Delta p= F\Delta t[/tex].
Assuming that the airplane was initially at rest, its change in momentum is:
[tex]\Delta p =m\Delta v,\\\Delta p=30,000\cdot 50=1,500,000[/tex]
Impulse is represented using [tex]Ns[/tex]. Therefore, convert [tex]20\:\mathrm{kN}[/tex] to Newtons:
[tex]20\:\mathrm{kN}=20,000\:\mathrm{N}[/tex]
Thus:
[tex]1,500,000=20,000\cdot t,\\t=\frac{1,500,000}{20,000}=\fbox{$75\mathrm{s}$}[/tex].
Help Please! 5 questions for 25 points? seems fair? Thank you!
Answer:
1. where the skater turns and goes back in the opposite direction- point w
2. gravitational force of the object
3. point a
4. the bar representing sphere 4 should be twice as tall as the bar representing sphere 2
5. B; its mass is smaller (?)
yolo
Answer:
ABCDEFGHIJKLMNOPQRSTUVWXYZ
Explanation:
A 4.00 kg block is pushed along the ceiling with a constant applied force of 85.0 N that acts at an angle of 55.0 degrees with the horizontal. The block accelerates to the right at 6.00 m/s2. Determine the coefficient of kinetic friction between block and ceiling.
Answer:
0.35
Explanation:
According to Newton's second law;
\sum Fx = ma
Fm - Ff =ma
Fm is the moving force = Wsin theta
Fm = 4(9.8)sin55
Fm = 32.1N
Ff is the frictional force = nmgcos theta
Ff = n(4)(9.8)cos55
Ff = 22.48n
Acceleration a = 6.0m/s²
Substitute the given values into the formula and get the coefficient of friction
32.11-23.48n = 4(6)
32.11-24= 23.48n
8.11 = 23.48
n = 8.11/23.48
n = 0.35
Hence the coefficient of friction is 0.35
Question 17 of 25
A sound wave from a brass bell passes through the air with a
wavelength of 3.5 m. When the sound wave originated in the
brass bell, its wavelength was 47 m. If the sound wave has a
constant frequency of 100 Hz, what was its speed as it
traveled through the brass bell? (The equation for wave speed
is v= f*1.)
A. 3,500 m/s
B. 4,700 m/s
C. 350 m/s
D. 470 m/s
Answer:
The speed of the wave as it travelled through the brass bell is;
B. 4,700 m/s
Explanation:
The given parameters are;
The wavelength of the sound wave produced from the brass bell, [tex]\lambda _{(air)}[/tex] = 3.5 m
The wavelength of the wave in the brass bell, [tex]\lambda _{(brass \ bell)}[/tex] = 47 m
The frequency of the wave in the brass bell, f = 100 Hz
The given equation for wave speed, v = f × λ
Therefore, the speed of the wave as it travelled through the brass bell, [tex]v _{(brass \ bell)}[/tex], is given as follows;
[tex]v _{(brass \ bell)}[/tex] = f × [tex]\lambda _{(brass \ bell)}[/tex] = 100 Hz × 47 m = 4,700 m/s
The speed of the wave as it travelled through the brass bell = [tex]v _{(brass \ bell)}[/tex] = 4,700 m/s
Answer:
B.) 4700 m/s
Explanation:
The phases of the moon are caused by which of the following
A. Earths rotation around its axis
B. Earths orbit around the sun
C. The moons orbit around the earth
D. Earths shadow falling on the moon
Answer: C: The moons orbit around the earth.
Explanation:
A 80 N horizontal force is applied to a 20.0 kg block at rest on a horizontal surface where µS = 0.6.? What is the magnitude of the force of friction on the block?
Answer:
The frictional force on the block is 118 N.
Explanation:
Given;
horizontal force applied on the block, f = 80 N
mass of the block, m = 20.0 kg
coefficient of friction, μ = 0.6
The frictional force on the block is calculated as;
F = μR
F = μ(mg)
F = 0.6(20 x 9.81)
F = 117.7 N
F = 118 N.
Therefore, the frictional force on the block is 118 N.
MY BRAINS NOT WORKING
Describe how Newton's Third Law applies to the forces between the bike and
the trailer.
Answer:
Explanation:
The Earth pulls the bicycle downward through the force of gravity, and, in response, the bicycle pulls up on the Earth with a force of equal magnitude. Gravity "pushes" the Earth into the road, which pushes up with an opposite force, canceling gravity. Thus, action reaction forces do not cancel each other.
Object 1 has a charge of -2.3 x 10^-6 and Object 2 has a charge of - 4.2 x 10 ^- 6 C. Calculate the electrostatic force between the two objects if they are 0.099 m apart.
A) 9.76 x 10^-11 N
B) 9.86 x 10^-10 N
C) 8.87 N
D) 0.878 N
Explanation:
i think it's A or C hope it helps
I NEED HELPP!!!
Calculating the Value of an Unknown Resistor
A car is traveling on the highway at 55 MPH. A slow moving truck cuts them off. He hits the gas pedal and speeds up to 78 MPH in order to pass him. It takes 6 seconds to complete the pass. What was his acceleration?
Answer:8 mph
Explanation:
Guidewords for the word “serpent” may be
a.
Serbia and service
c.
Seltzer and Saturday
b.
Seattle and section
d.
Solitude and second
THE CORRECT ONE IS A!!!!!!!!
Answer:
A. Serbia and service
Explanation:
A guide word is a word written on top of a page to indicate the first or last word entry on that page. For example in a dictionary, they indicate the alphabetical first and last words on the page.
In this example; the word ' serpent ' note the first three letters to guide you in the words that are on that page;
In this case : Serbia and Service.
If there is a difference in air pressure between two locations, what happens?
Answer:
High in the atmosphere, air pressure decreases. ... A low pressure system has lower pressure at its center than the areas around it. Winds blow towards the low pressure, and the air rises in the atmosphere where they meet. As the air rises, the water vapor within it condenses, forming clouds and often precipitation.
Explanation:
1. A net force of 13 Newtons acting north on an object for 4.0 seconds will produce an impulse of?
Answer:
48 kg m/s north
Explanation:
This is not the exact answer but if there's something really close choose that answer
Thanks + BRAINLIST
Need correct answer ASAP
Answer:
The options are not shown, so it is kinda hard to give you the exact answer.
But i can try to give a general explanation on the topic.
Interference happens when two waves interact between them. We usually use waves with the same wavelength and same phase.
There are two "main" types of interference:
Destructive interference: Happens when the peak of one wave and the trough of the other wave happen in the same place, then when we add these waves, we have a subtraction, and then the amplitude of the resultant wave is smaller than the amplitudes of the original waves (if both initial waves have the same amplitude, then the amplitude of the resultant wave in that position is zero).
Constructive interference: Similar to the previous case, but now the two waves have the peaks or toughs in the same position, then when we add the waves, we have an addition in the amplitude, then the amplitude of the resultant wave will be larger than the amplitudes of the initial waves.
Then if you are looking for constructive interference, you need to look for an option where the peaks of the waves coincide. For example, in the top image we can see, at the top, a wave with an amplitude of 2 units.
And at the bottom a wave with an amplitude of 1 unit.
We also can see that the peaks (and the tough) are in the same place, then we will have constructive interference. Then the amplitude of the resultant wave will be equal to the sum of the amplitudes of the initial waves (2 and 1)
Then the amplitude of the resultant wave is 2 units + 1 unit = 3 units.
An Olympic athlete threw a javelin at the following angles, 30°, 40°, 60°, and 70°. All at the
same speed. Which two angles resulted in the same distance?
Answer:
30 and 60 degrees
Explanation:
what’s the doing between high and low pressure systems.
High pressure systems entail sinking air, while lows entail rising air. High pressure systems form where air converges in the higher levels of the atmosphere. The converging air has nowhere to go and is forced to sink toward the ground. This sinking effect inhibits cloud formation and therefore precipitation.
Question 3 of 10
Which point on the standing wave is the result of the constructive
interference of two crests?
B
D
A. A
O O o
B. B
C. C
D. D
Answer:
It is option A
Explanation:
a p e x
Point A on the standing wave is the result of the constructive interference of two crests. The effect is the sum of the individual wave amplitudes at each site where more than one wave is present.
What is the interference of waves?The result of two or more wave trains flowing in opposite directions on a crossing or coinciding pathways. This phenomenon is known as the interference of waves.
When two wave pulses are traveling along a string toward each other. They meet, and the phenomenon is occurring, known as interference.
The distance between two successive troughs or crests is known as the wavelength. The peak of the wave is the highest point known as crest.
Point A on the standing wave is the result of the constructive interference of two crests.
Hence, option A is correct.
To learn more about the interference of waves, refer to the link;
brainly.com/question/16098226
#SPJ2
Help Please!
Think about how you can get the color white from using light versus how you can get the color white from using paint or dye. Now, think about how you can get the color black from using light versus from paint or dye. Using this, explain why we call coloring from light “additive” and coloring from paint or dyes “subtractive”.
Answer: Subtractive colors absorb OR subtract some lights causing it to reflect, and creating white.
Explanation:
Subtractive colors are created by completely or partially absorbing (or subtracting) some light wavelengths and reflecting others.
i need help cause i dont get it
I think it is wrong somehow
Across
3) biomass
5) fossil
6) dioxide
7) hydro
8) nuclear
Down
1)?
2)?
4) solar
Q. IF THE SPEED LIMIT IS 22M/S, IS THE CAR TRAVELLING TOO FAST.
Answer:
yes its travelling at 79.2 km/h (49.2m/h)
HELP PLEASE!
A 700 kg race car makes one lap around a track. It has a velocity of 20 m/s with a centripetal force of 5,600 N. What is the radius of the track?
A speed skater goes around a turn with a 25 m radius. The skater has a velocity of 15 m/s and experiences a centripetal force of 720 N. What is the mass of the skater?
A 900-kg car moving at 5 m/s takes a turn around a circle with a radius of 30 m. Determine the net force acting upon the car.
An 800 kg race car makes one lap around a track. It has a velocity of 40 m/s with a centripetal force of 16,000 N. What is the radius of the track?
PLEASE EXPLAIN AND SHOW WORK!
The centripetal force is the force that keeps a body moving in a circular path.
The centripetal force is given by; F = mv^2/r
1) We have;
F = 5,600 N
v = 20 m/s
r =?
m = 700 kg
Making r the subject of the formula;
r =mv^2/F
r = 700 × (20)^2/5,600
r = 50 m
2) F = mv^2/r
F = 900 × (5)^2/30
F = 750 N
3) Making r the subject of the formula;
r =mv^2/F
r = 800 × (40)^2/ 16,000
r = 80 m
Learn more: https://brainly.com/question/11324711
what is projectile motion
If an object is given an initial velocity in any direction and then allowed to travel freely under gravity, it is called a projectile motion.
It is basically 3 types.
horizontally projectile motion oblique projectile motion included plane projectile motionIf an oceanic plate and a continent plate converge, or push towards each other, which plate will sink under the other one?
Answer:
The oceanic plate will sink under
Explanation:
Due to erosion over time and the sudden shift, the continental plate will rise causing earthquakes, tsunami’s, etc..
4. A toy car travels 60 m during 5.7 s at a constant speed. What is the speed of the toy car?
15.556
13.526
6.116
10.526
None of these is correct.
Answer: 10.526m/s
Explanation:
The speed of the toy car would be calculated as the distance travelled by the toy card divided by the time taken. This will be:
= Distance travelled / Time taken
= 60/5.7
= 10.526m/s
The speed of the toy car is 10.526 meters per second.