The speed change : Δv = 0.41 m/s
Further explanationGiven
mass = 5.5 kg
Force = 15 N
time = 0.15 s
Required
the speed change
Solution
Newton 2nd's law
Impulse and momentum
F = m.a
F = m . Δv/t
F.t = m.Δv
Input the value :
15 N x 0.15 s = 5.5 kg x Δv
Δv = 0.41 m/s
Why is a final score of 21-3 more likely to occur in a football
game than a score of 19-5?
25 POINTS please help!
What is average acceleration?
a. how fast a speed is changing over an interval of time
b. how fast velocity is changing at a specific instant in time
c. how fast a direction is changing at a specific instant
d. all of the above
Answer:
b
Explanation:
Answer: b
Explanation:
How does Boyle's laws describe the relationship between gas pressure and volume?
Answer:
For a fixed mass of an ideal gas kept at a fixed temperature, pressure and volume are inversely proportional. Or Boyle's law is a gas law, stating that the pressure and volume of a gas have an inverse relationship. If volume increases, then pressure decreases and vice versa, when the temperature is held constant.
PLS ANSWER FAST WILL GIVE BRAINLSET!!!
Calculate the missing variables using the necessary formula and rules using "FORCE"
A tractor carrying hay bales a total mass of 9 100 kg. What force is required to reach acceleration of 4 m/ s2
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Explanation:
A bear scratches his claws on a big pine tree. Does the bear do work on the tree? why or why not?
(btw it has to do with physics) ITS NOT A GENERAL QUESTION.
Answer:
The bear is actually sharpening his claws. That's the only reason he scratches a tree with his claws
Explanation:
A student drops a ball out of a helicopter flying 40.0m/s horizontally at an altitude (height) of 77.0m. Neglect drag.
How long did the ball remain in the air?
How far did the ball travel horizontally before striking the ground?
WHICH ROLLER COASTER CART HAS THE LEAST POTENTIAL ENERGY DUE TO GRAVITY?
Answer:
C. Car A
Explanation:
if the answer is: which roller coaster car has the greatest potential energy due to gravity brainly
Answer: Car C
Explanation:
A P E X
Need help ASAP
Will mark BRAINLIST and thanks only for correct answers
1.What is the correct way a cell phone call goes out?
-The phone call goes out, transmits through microwaves, then moves to the central hub. Then the signals go to the nearest tower to the receiver of the call.
-The phone call goes out, transmits through radio waves, then moves to the central hub. Then the signals go to the nearest tower to the receiver of the call.
-The phone call goes out, transmits through microwaves, then moves to the tower. Then the signals go to the nearest hub to the receiver of the call.
2.Which property of AM frequencies allow them to travel over long distances?
-high amplitude
-high energy
-constant velocity
-long wavelength
3.what types of waves do cell phones use?
-radio waves
-gamma rays
-microwaves
Answer:
1. The phone call goes out, transmits through radio waves, then moves to the central hub. Then the signals go to the nearest tower to the receiver of the call.
2. long wavelength
3. radio waves
Explanation:
1. A cell phone call is works basically as a two-way radio, consisting of a radio transmitter and a radio receiver. When you dial a call to a friend on your cell phone, your phone converts your voice into an electrical signal, which is then transmitted through radio waves. The radio waves then moves to the central hub. Then the signals go to the nearest tower. The network of cell towers then relays the radio wave to your friend’s cell phone, which converts it to an electrical signal and then back to sound again.
2. AM means amplitude modulation. In AM frequencies, sound signals are modulated by changing the amplitude or maximum height of radio waves. AM frequencies use longer wavelength radio waves than FM frequencies. Because of their longer wavelengths, AM waves reflect off a layer of the upper atmosphere called the ionosphere, and thus travel over longer distances than FM waves.
3. Cell phones use radio waves to communicate.
Hari drag a load of 60 kg along a distance of 12 metre what amount of work does he do also mention the type of work
Answer:
W = 7056 J
Explanation:
Given that,
Mass of a load, m = 60 kg
Distance moved, d = 12 m
We need to find the amount of work. The work done by an object is given by :
W = Fd
So,
W = mg×d
W = 60 kg × 9.8 m/s²×12 m
W = 7056 J
So, the amount of work done is 7056 J.
1
an optical block is related to:
1. Lateral displacement produced by a
Answer:
1. Compact units containing optical components such as bandpass filters and dichroic mirrors. For example, a low cost fluorescence or confocal microscope can be built by combining a laser, optical blocks, and microscope objective lenses.
2. The lateral displacement is directly proportional to the thickness of the glass slab. When the light enters a glass slab,the light rays are refracted. Now,the lateral displacement is the final distance between the incident ray and the emergent ray
A(n) _______ is a line in which waves move that are moving together all in the same phase
Light wave
Wave front
Incident beam
Dark wave
Answer:
wave front
Explanation:
wave front is an imaginary line of a wave that joins all adjacent points that are in phase,
so that's the definition, and you apply it to the question
it obviously can't be the rest
hope you get it
please mark it brainliest
Answer:
B Wave front
Explanation:
EDG 21
Think about a situation at school where you or someone you know
has demonstrated grit. Describe the situation. Pls help me
Answer:
to have courage and show the strength of your character. ... A person with true grit has passion and perseverance. Goals are set and followed through.
Explanation:
for example: i had the passion and the courage to finish my school work and chores for i can go out with my friends and to get out of the house for a bit and have fun so i had the courage to finish chores from the house and do some schoolwork for i can finish ad hang out with some friends. so i had the strength to finish everything because i didn't want to be doing school work and chores any more so i had the passion to finish up quickly
How far must a spring with a spring constant of 64N/m be stretched to
store 0.32J of potential energy?
Answer:
0.1m
Explanation:
k = 64N/m
Ep = 0.32J
x = ?
Ep = 1/2 * kx²
make x the subject of the formula
x² = 2Ep/k
x = √(2Ep/k)
x = √(0.64/64)
x = √0.01
x = 0.1m
I need to find the total mechanical energy. I think the first one is correct but the second one is wrong
Answer:
di ko po alam ang sagot baka
po pang grade 9 po yan
Explanation:
sana po magets nyo po
Do different types of electromagnetic waves travel at different speeds?
No.
Radio, TV, microwave, heat, red, yellow, blue, tanning rays, X-rays, and gamma rays all travel at the same speed. It's called the "speed of light".
(As long as they're all traveling through the same stuff.)
Which form of electromagnetic radiation with a relatively high amount of energy is used to sanitize lab goggles?
Answer:
Gamma radiation.
Explanation:
Electromagnetic waves are waves produced with respect to the interaction of electric field and magnetic field. They can be arranged with respect to their increasing or decreasing wavelength to form a pattern called electromagnetic spectrum.
Gamma radiation can be used for sterilization purpose due to the fact that it has a relatively high amount of energy, and do not produce any characteristic radiation.
How are magnets used in modern technology?
Where is most of Earth’s freshwater found?
in the ground
near the poles
in lakes and streams
in the air as water vapor
How much power is required to carry a 35 N package a vertical distance of 18 m if the work on the package is accomplished in 30 s?
Answer:
P = 21 watts
Explanation:
Given that,
Weight of a package, F = 35 N
Distance, d = 18 m
Time, t = 30 s
We need to find the power required to carry the package. Power is equal to the work done divided by time. So,
[tex]P=\dfrac{W}{t}\\\\P=\dfrac{Fd}{t}\\\\P=\dfrac{35\times 18}{30}\\\\P=21\ W[/tex]
So, the required power is 21 watts.
The height of a transverse waves is known as its?
Answer:
amplitude
Explanation:
amplitude of a wave is the maximum displacement of a point from its rest position.
hope you get it,
A box weighing 2.4 x 10^2 Newton's is lifted at a constant speed to a shelf 1.2 meters high in 4.0 seconds. What power is required to lift the box
Answer:
72Watts
Explanation:
Power = Force * distance/Time
Given the following
Force = 2.4 x 10^2 = 240N
distance = 1.2m
Time = 4.0secs
Substitute
Power = 240*1.2/4
Power = 60 * 1.2
Power = 72watts
Hence the power required to lift the box is 72Watts
PLS, THIS IS URGENT!! Read the following passage that explains the image you examined at the beginning of the lesson in order to answer the following question. Why is it important to have a range of tools that can measure all parts of the electromagnetic spectrum?
I would give the BRAINLIEST for the best answers!!!
Answer:
It is important to have a range of tools that can measure all parts of the electromagnetic spectrum because electromagnetic spectrum have different radiations such as infrared, visible light, ultraviolet, radio waves, microwaves, X-rays and gamma rays. Each of these radiation requires different instrument for their measurement. So that's why a range of tools are needed to measure electromagnetic spectrum.
A 2500-kg car is being pushed up a hill at an angle of 35 degrees. Determine the gravitational
force pulling down on the car if it is accelerating up the hill at a rate of 5 m/s/s.
Answer:
The force that pulls the car down is Wₓ = 14052.6 N and the one that pushes the car up is F = 26552.6 N
Explanation:
For this exercise we will use Newton's second law, let's set a reference system where the x axis is parallel to the plane, in the adjoint we can see the forces in the system.
sin 35 = Wₓ / W
cos 35 = W_y / W
Wₓ = W sin 35
W_y = W cos 35
Wₓ = 2500 9.8 sin 35
Wₓ = 14052.6 N
let's write the equations for each axis
and
Y axis
N-W_y = 0
N = W_y
X axis
F -Wₓ = m a
F = Wₓ + m a = mg sin 35 + m a
F = m (a + g sin 35)
let's calculate
F = 2500 (5 + 9.8 sin 35)
F = 26552.6 N
The force that pulls the car down is Wₓ = 14052.6 N and the one that pushes the car up is F = 26552.6 N
which of the following cannot be used for measurement of time
a A leaking tap
b simple pendulum
c shadow of object during the day
d blinking of eyes
Answer:
D. blinking ofeyea
Explanation:
not really sure
Que se debe cumplir para que la tabla permanezca en equilibrio Es un balancin con dos niños el primero m1= 45kg el segundo m2=38kg Del centro a la izquierda existe una distancia de 160 CM Hallar la distancia del centro a la derecha
formula: m1 * d1 = m2 * d2
datos:
m1= 45 kg
d1= 160 cm
m2= 38 kg
d2= x
reemplazamos datos en formula:
45kg * 160cm = 38kg * d2
El 38 pasa al otro lado de la igualdad a dividir:
(45kg * 160cm) / 38 kg = d2
Resolvemos: (kg se cancela con kg, quedando solo los cm)
7200cm / 38 = d2
Resultado:
d2 = 189.5 cm
Respuesta: La condición que se debe cumplir es que la distancia del centro al niño de la derecha sea de 189.5cm
2. A car with mass 2,500 kg is travelling at 15 m/s. What is the car's kinetic energy?
a. 37,500 J
b. 563,000 J
c. 280,000 J
d. 350,000 J
Answer:
c, 280,000J
Explanation:
You should use the equation KE (Kinetic Energy) = [tex]\frac{1}{2} mv^2[/tex]
m = 2500
v = 15
KE = [tex]\frac{1}{2} * 2500 * (15)^2\\[/tex]
KE = 281250 Joules.
This is consistent with the answer B, as all of the parameters given to you are rounded to 2 significant figures so naturally, the answer should also be rounded to 2 sig figs.
KE = 280,000 J
Physicists often use a different unit of energy, the electron volt, when dealing with energies at the atomic level. One electron volt, abbreviated eV, is defined as the amount of kinetic energy gained by an electron upon accelerating through a 1.0 V potential difference.
a) what is 1.0 electron volt in joules?
b) what is the speed of a proton with 5000 eV of kinetic energy?
Answer:
a) E = 1.06 10⁻¹⁹ J, b) v = 9.78 10⁵ m / s
Explanation:
The physical magnitudes can be given in several units, but in general all must be reduced to the same system in a given exercise, the most used system is the international (SI)
1 eV =q V= 1.6 10⁻¹⁹ J
let's reduce the quantities requested
a) E = 1.0 eV to Joule
E = 1.0 eV (1.6 10⁻¹⁹ J / 1 eV)
E = 1.06 10⁻¹⁹ J
b) the kinetic energy is given by
K = ½ m v²
v = [tex]\sqrt{\frac{2K}{m} }[/tex]
the mass of the proton is
m = 1,673 10⁻²⁷ kg
let's reduce the energy to the SI system
E = 5000 ev (1.6 10-19 J / 1 eV) = 8000 10⁻¹⁹ J
let's calculate
v = [tex]\sqrt{ \frac{2 \ 8000 \ 10^{-19}}{1.673 \ 10^{-27} } }[/tex]
v = [tex]\sqrt{ 95.637 \ 10^{10} }[/tex]
v = 9.78 10⁵ m / s
these two pls :)))) ill mark brainliest :)
Answer:
Bowling Ball: weight on Earth = 49 N
Textbook: Mass = 2 kg; weight on the moon = 3.2 N
Large dog: weight on Earth = 490 N; weight on the moon = 80 N
Law of Universal Gravitation: [tex]F_{G}=\frac{Gm_{1}m_{2}}{r^{2}}[/tex]
[tex]F_{G}[/tex] = gravitational force (Newtons/N)
G = gravitational constant, 6.67430 × 10¹¹ [tex]\frac{N*m^{2}}{kg^{2}}[/tex]
m₁ and m₂ = masses of two objects (kilograms/kg)
r² = square of distance between centers of the two objects (meters/m)
Have a fantastic day!
If two negative charges of -2 C and -2 C are put 32,692 m apart from each other how much force will push them apart?
Answer:
33.65 N
Explanation:
Force that will push them away is given from the equation;
F = Kq1•q2/r²
Where;
K is coulumbs constant = 8.99 × 10^(9) Nm²/C²
We are given;
q1 = q2 = -2 C
r = 32692 m
Thus;
F = 8.99 × 10^(9) × (-2) × (-2)/32692²
F ≈ 33.65 N
What are sum fossil fuels?
what is a fossil fuels and what is a example
Answer:
Coal, crude oil, and natural gas are all considered fossil fuels all considered fossil fuels because they were formed from the fossilized, buried remains of plants and animals that lived millions of years ago.
Explanation:
Coal, crude oil, and natural gas are all considered fossil fuels because they were formed from the fossilized, buried remains of plants and animals that lived millions of years ago. A fossil fuel is a natural fuel such as coal or gas, formed in the geological past from the remains of living organisms.