Answer:
True
Explanation:
the horse pull on the wagon but friction and the wight + gravity make the wagon pull on the horse ( newton's 2ed law)
I WILL GIVE BRAINLEST, PLZ HURRY!!!
Answer: its b because as soon as you go far away from light it get red and dents
Explanation:
PLEASE HELP ME I HAVE NO IDEA WHO JAKIE ROBINSON IS...
1.) Why is Jackie Robinson an American hero?
2.) What do you admire about Mr.Robinson
3.) If Jackie Robinson was alive today, what do you think he will have to say?
Answer:
ch 46umm nym m m m m hj hj hj
Explanation:
Explain how a helicopter lifts itself up, from a Newton's 3rd Law perspective,
What is the kinetic energy of a 90 kg mass that is moving with a velocity of 6 m/s?
Answer:
The kinetic energy of a 90 kg mass that is moving with a velocity of 6 m/s is 1620 J.
Explanation:
Given
Mass m = 90 kgVelocity v = 6 m/sTo determine
Kinetic Energy E = ?The kinetic energy (K.E) of a body of mass of a 90 kg mass that is moving with a velocity of 6 m/s can be calculated using the formula
[tex]K.E=\frac{1}{2}mv^2[/tex]
where
m is the mass (kg) v is the velocity (m/s)K.E is the Kinetic energy (J)substituting m = 90 and v = 6 in the formula
[tex]K.E=\frac{1}{2}mv^2[/tex]
[tex]K.E=\frac{1}{2}\left(90\right)\left(6\right)^2[/tex]
[tex]=\frac{1}{2}\left(90\right)\cdot \:36[/tex]
[tex]=1620[/tex] J
Therefore, the kinetic energy of a 90 kg mass that is moving with a velocity of 6 m/s is 1620 J.
A 32 kg object has a momentum of 480 kg m/s northward. What is the
object's velocity?
O A. 15,360 m/s
B. 15 m/s
O C. 448 m/s
OD. 0.067 m/s
Answer:
B. 15 m/s
Explanation:
p = m × v
480 = 32 × v
32v = 480
v = 480/32
v = 15 m/s
Answer:
B. 15 m/s
Explanation:
P=MV
480=32×v
v=15m/s
Solids in which the atoms have no particular order or pattern are called
Answer:
Amorphous solids are composed of atoms or molecules that are in no particular order. Each particle is in a particular spot, but the particles are in no organized pattern. Examples include rubber and wax. Crystalline solids have a very orderly, three-dimensional arrangement of atoms or molecules
Explanation:
17. A car traveling with a velocity of 45 m/s and has a mass of 1120 kg. The car has _________
energy. Calculate it
Answer:
[tex]sln \\ given \\ velocity \:(v) = 45ms {}^{ - } \\ mass \: of \: car \: (m) = 1120kg \\ kinetic \: enegy(k.e) = x \\ \\ k.e = \frac{1}{2} MV {}^{2} \\ k.e = \frac{1}{2} \times 1120 \times 45 \\ k.e = 25200j[/tex]
the car has kenotic energy is 2500J
The car will , have the kinetic energy of 1134 kJ. The kinetic energy is found as the product of half of mass and the square of velocity.
What is kinetic energy?The energy of the body by the virtue of its motion is known as the kinetic energy of the body. It is defined as the product of half of mass and square of the velocity.
The given data in the problem is;
A car traveling with a velocity,v= 45 m/s
The mass is, m= 1120 kg.
The kinetic energy is found as;
[tex]\rm KE = \frac{1}{2} mv^2 \\\\\ \rm KE = \frac{1}{2} 1120 (45)^2 \\\\\ \rm KE = 1134 \ kJ[/tex]
Hence, the car will , have the kinetic energy of 1134 kJ.
To learn more about kinetic energy, refer to the link;
brainly.com/question/999862
#SPJ2
a mother and a daughter are sitting on park swings. they ask you to push them so they can swing to the same height. which will require you to push with more force?
Answer:
the mother
Explanation:
the child is smaller and has less mass so it would be easier to push the baby rather than the mother. so you would put more force into pushing the mother
Which property of an object changes when an unbalanced force acts on it?
Mass
Inertia
Velocity
Temperature
Answer:
Velocity
Explanation:
When unbalanced forces acts on an object the velocity of the object changes. This is because, unbalanced forces causes a body to accelerate.
Acceleration is the rate of change of velocity with time taken.
An unbalanced force on a body causes a net force greater than zero and this makes the velocity of the body to change.
Therefore, an unbalanced force on a body will cause a change in the velocity of the body.
Answer:
velocity
Explanation:
mhm
Can someone help me answer this??
Answer:
3,2 oky na dekh Lena ek bar2,5What is ONE variable that will change the amount of POTENTIAL ENERGY
of a box on the floor?
Answer:
The height or the mass
Explanation:
The one variable that can change the potential energy of a box on the floor is either the height or the mass of the box.
Potential energy is the energy due to the position of a body.
Mathematically;
Potential energy = mass x acceleration due to gravity x height
Therefore, if the mass of the box is changed, the potential energy changes also.
If the position of the box is changed by raising it up, the potential energy changes
A 33 kg child on a swing has a potential energy of 720 J with respect to the ground. What is the child’s height above the ground? please answer soon
Answer:
h = 2.22 m
Explanation:
Using the international system, we know that the gravity of the earth is 9.8 m / s².
then, we have as data:
Potential Energy (Ep) = 720 JMass (m) = 33 kgGravity (g) = 9.8 m/s²Height (h) = ?Use formula:
[tex]\boxed{h=\frac{Ep}{m*g}}[/tex]Replace:
[tex]\boxed{h=\frac{720J}{33kg*9.8\frac{m}{s^{2}}}}[/tex]Joules descompose:
[tex]\boxed{h=\frac{720N*m}{33kg*9.8\frac{m}{s^{2}}}}[/tex]Solve the multiply of mass and gravity:
[tex]\boxed{h=\frac{720N*m}{323.4kg*\frac{m}{s^{2}}}}[/tex]Multiply the units. Knowing that kg * m/s² = N, so:
[tex]\boxed{h=\frac{720N*m}{323.4N}}}[/tex]Simplify the Newtons (N), and it divides:
[tex]\boxed{h=2.22\ m}[/tex]What is the child’s height above the ground?
The child's height above the ground is 2.22 meters.
In which direction does an applied force move an object?
Question 1 options:
independent of the force
in the opposite direction of the force
in the same direction as the force
perpendicular to the force
Answer:
in the opposite direction of the force
Answer:
The force applied moves the object in the direction of the force. Suppose if the force is applied to the moving object in that case object moves in the direction of the stronger force. Thus, according to the given question the applied force moves the object in its direction.
that means it's the 2nd option( in the opposite direction of the force
TC
Displacement of a particle executing SHM is represented by Y = 0.08 sin 3nt +
metre. Then calculate-
a time period
(d) Time period
(
Minitial phase
wõisplacement
7
(c) Displacement from mean position at t=
36
sec.
Answer:
0.08 sin 3nt +
metre. Then calculate-
a time period
(d) Time period
(
Minitial phase
wõisplacement
7
(c) Displacement from mean position at t=
36
sec.
Explanation:
thats the answer
UGH PLSSSS HELP WILL GIVE BRAINLIEST, AND 20 POINTS
A nonpolar bond is formed when two atoms share electrons unequally.
Please select the best answer from the choices provided
T
F
Answer:
false
Explanation:
the answer is false bc for a non-polar bond to form the electrons are shared equally...
(a)The weight of two metallic spheres, each of 200 g and radius 4 cm and
10 cm respectively are measured in water and vacuum How will the ratio
of their weights change in water and in vacuum? Explain
What is the average speed between 5 seconds and 15 seconds?
Answer:
10 seconds
Explanation:
We can calculate the average speed by finding the total distance traveled divided by the elapsed time: Average speed=–s=Total distance Elapsed time
NEED HELP ASAP !! WILL GIVE BRAINLEIST !!
Answer:
53775
Explanation:
ke= 0.5mv(2)
= 0.5 x 478 x 15(2)
53775
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 its average acceleration?
plz, show the equation.
Answer:
6m/s²
Explanation:
Given parameters:
Initial velocity = 4m/s
Time = 3s
Final velocity = 22m/s
Unknown:
Average acceleration = ?
Solution:
Acceleration is the rate of change of velocity with time taken.
Acceleration = [tex]\frac{Final velocity - Initial velocity }{Time}[/tex]
Acceleration = [tex]\frac{22 - 4}{3}[/tex] = 6m/s²
plzzzzzz help :(((((((((((
Answer:
4. a) F
b) E
c) B
d) D
Hope it helps
an iPod rest at a 1.2 m high table how much time does it take to fall to the floor
Answer:
0.49 s
Explanation:
i'm in middle school sorry if i'm wrong.
The time taken for the iPod to fall from the top table is 0.5 s.
The given parameters;
height of the table, h = 1.2The time taken for the iPod to fall from the top table is calculated as follows;
[tex]h = v_0t + \frac{1}{2} gt^2\\\\h = 0 + \frac{1}{2} gt^2\\\\h = \frac{1}{2} gt^2\\\\gt^2 = 2h\\\\t^2 = \frac{2h}{g} \\\\t = \sqrt{ \frac{2h}{g} } \\\\t = \sqrt{ \frac{2\times 1.2 }{9.8} }\\\\t = 0.5 \ s[/tex]
Thus, the time taken for the iPod to fall from the top table is 0.5 s.
Learn more here:https://brainly.com/question/2018532
A CIRCULAR COIL OF 20 TURNS OF RADIUS 10.0 cm IS PERPENDICULAR TO A 0.30 tesla MAGNETIC FIELD. HOW MUCH INDUCED emf IS CREATED WHEN THE COIL IS ROTATED IN 0.12 s, SO ITS FACE IS PARALLEL TO THE FIELD?
Answer:
1.57 V
Explanation:
The induced emf ε = -ΔΦ/Δt where Φ = magnetic flux = NABcosθ where N = number of turns of circular coil = 20, A = area of coil = πr² where r = radius of coil = 10.0 cm = 0.1 m , B = strength of magnetic field = 0.30 T,θ = angle between normal to are and magnetic field and Δt = change in time = 0.12 s
Now ΔΦ = change in magnetic flux through circular coil = Φ' - Φ
Φ = magnetic field when A is perpendicular to B , that is θ = 90°. So, Φ = NABcos90 = 0 and Φ' = magnetic field when A is parallel to B , that is θ = 0°. So, Φ' = NABcos0 = NAB
So, ΔФ = Ф' - Ф
= 0 - NAB
= -NAB
= -Nπr²B
= -20 × π(0.1 m)² × 0.30 T
= -0.19 Wb
So, ε = -ΔΦ/Δt
= -(-0.19 Wb)/0.12 s
= 1.57 Wb/s
= 1.57 V
The induced EMF in the coil is 1.57 V
Induced EMF:The induced EMF is produced due to the changing magnetic flux through a coil. Mathematically EMF is the rate of change of flux.
E = -ΔФ/Δt
where ΔФ is the change in the magnetic flux, and
Δt is the time period
Initial magnetic flux through the coil is:
Ф = NABcosθ ,
N = 20, number of turns
A = area of the coil = πr² = 3.14 × (0.1)² = 0.0314 m²
B = 0.30 T, magnetic field
here θ = 90°
so , Ф = 0
Final magnetic flux through the coil is:
Ф' = NABcosθ, here θ = 0°, so
Ф' = 20 × 0.0314 × 0.30 × 1
Ф' = 0.1884 Wb
ΔФ = Ф - Ф'
ΔФ = -0.1884 Wb
given that Δt = 0.12s
E = -ΔФ/Δt
E = 0.1884 / 0.12
E = 1.57 V
Learn more about induced EMF:
https://brainly.com/question/4721624?referrer=searchResults
_________ forces exist between objects that are not in contact with each other
Answer:
Gravity as well as electrostatic and magnetic attraction and repulsion provide real life examples of forces being exerted by one object on another without them being in contact with each other. Many children are aware of magnetism and have played with fridge magnets.
Violet pulls a rake horizontally on a frictionless driveway with a net force of 2.0N for 5.0M. How much kinetic energy does the rake gain?
Answer:
10j
Explanation:
2x5=10
Violet pulls a rake horizontally on a frictionless driveway with a net force of 2.0 N for 5.0 m.
How much kinetic energy does the rake gain?
Answer: 10 J
The internal carrying force of the 4 volts of the cell in the enclosed circuit is negligible. Find out
1 total resistance
2nd circuit
3 Differential difference between a and c points
Answer:
thaYeah, I kinda dont have an answer for you either... sorry -__-
Explanation:
2. How much energy does a 5 kg tennis ball have
that is sitting on a shelf that is 2m high?
Answer:
GPE= h a m
GPE= (2)(9.8)(5)
GPE=98 J
The car transports 180 m in 12 s. Calculate its speed and express it in m / s and in km / h
Explanation:
Given parameters:
Distance = 180m
Time = 12s
Unknown:
Speed in m/s and km/hr
Solution:
Speed is the distance divided by the time taken,
Speed = [tex]\frac{distance}{time}[/tex]
So;
Speed = [tex]\frac{180}{12}[/tex] = 15m/s
1000m = 1km
3600s = 1hr
Therefore;
15 x m x [tex]\frac{1}{s}[/tex] x [tex]\frac{1km}{1000m}[/tex] x [tex]\frac{3600s}{1hr}[/tex] = 54km/hr
Pls help with either of these I will give up brainliest
Answer:
1. The bird close to the center
2. 4/25 of the original force.
Explanation:
1. Tangential velocity is v=w*d (in m/s), where w is the rotational speed, commonly denoted as the letter omega (in radians per second). d is the distance from the center of the rotating object to the position of where you would like to calculate the velocity (in meters).
As we can note, the furthest from the center we are calculating the velovity the higher it is, because the rotational velocity is not changing but the distance of the object with respect to the center is. If v=w*d, then the lower the d (distance) the lower the tangential velocity.
2. Take a look at the picture:
We have the basic equation for the gravitational force.
We have to forces: Fg1, which is the original force, and Fg2, the force when the mass and the distance changes.
If we consider that mass 2 didn't change (m2'=m2), mass 1 is four times its original (m1'=4*m1) and distance is 5 times the original (r'=5*r), then next step is just plugging it into the equation for Fg2.
Dividing the original force Fg1 by the new force Fg2 (notice you can just as well do the inverse, Fg2 divided by Fg1) gives us the relation between the forces, cancelling all the variables and being left only with a simple fraction!
a spring is compressed then launches a block vertically. The spring is compressed 15 cm and has a spring constant of 342 N/m. If the block has a mass of 1.4 kg, what is the maximum height it can reach?
Answer:
6.342 m/s. 2).
Explanation:
Which element easily loses one electron to form a positive ion?
Answer/Explanation: As mentioned above, the characteristic chemical property of a metal atom is to lose one or more of its electrons to form a positive ion. However, certain metals lose electrons much more readily than others. In particular, cesium (Cs) can give up its valence electron more easily than can lithium (Li).
-Bababooeyboy