Answer:
37.5 kg⋅m/s
Explanation:
p = mv
p = (1.5)(25) = 37.5 kg⋅m/s
Momentum is conserved in all collisions and explosions!
someone help real quick please
On one run along a measured distance of 200 m, the bicycle's speed is 40 m/s.
(a) Calculate the time taken by the bicycle to travel this distance.
(b) State the formula you use and show your working.
Answer:
5 sec
Explanation:
The formula for speed is distance/time taken. so if we use cross multiplication we get distance = speed x time taken. And to get rid of speed we divide both equations by speed like this distance = speed x time taken
speed speed
We cancel out speed by speed and we get this formula to calculate time.
time taken = distance
speed
Now we got the formula we need so we substitute them by their values.
time taken = 200m
40m/s
We cancel meter by meter and divide 200 by 40 and the answer will be 5 seconds. please give me like, thank me and make my answer the brainliest.
Explain how differences in air pressure allows us to breathe
Difference in air pressure helps us by contraction and relaxation of lungs which forces air in and out of the lungs.
What is pressure?The pressure is the amount of force applied per unit area. It is represented as
Pressure p = Force/Area
The atmospheric pressure is constant. The flow of air is determined by how much above or below atmospheric pressure. The pressure inside the lungs rises or falls. The diaphragm in the lung contracts and relaxes which forces air in and out of the lungs.
Hence, the person uses diaphragm of lungs to breathe.
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What is the resultant of the two vectors shown?
Explanation:
The correct is (c). cuz, the tail of A and the tip of B will join
The volume in the pump when the pump piston is all the way down represents the _______
The volume in the pump when the pump piston is all the way down represents the end systolic volume.
What is systolic volume?
End systolic volume is the volume of blood in a ventricle at the end of contraction, or systole, and the beginning of filling, or diastole.
End systolic volume is the lowest volume of blood in the ventricle at any point in the cardiac cycle.
Thus, the volume in the pump when the pump piston is all the way down represents the end systolic volume.
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Electric Resistance measured in?
Answer:
ohms
Explanation:
because it deal with circuit
Electric resistance is measured in Ohms.
What is an Electric resistance?A electric resistance can be defined as the opposition to current flow in a conductor.
From ohms law, an electric resistance can be determined using the formula below.
Formula:
V = IR.............. Equation 1Where:
V = VoltageI = CurrentR = Electric resistanceAlso,
V is measured in VoltsI is measured in AmpereR is measured in Ohms.Hence, Electric resistance is measured in Ohms.
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Objects A and B have been projected from the same point at angles 30° and 60° with the ground, respectively. If both objects
reach the same height what is the ratio of their velocities Va and Vb
A). 3:1
B). 2:1
C). 1:1
D). 2:1
If both objects reach the same height, the ratio of their velocities Va and Vb is 3:1. The correct option is A.
What is projectile?When an object is thrown at an angle from the horizontal direction, the object is said to be in projectile motion. The object which follows the projectile motion.
Objects A and B have been projected from the same point at angles 30° and 60° with the ground, respectively. If both objects reach the same height.
The maximum height of the objects A and B are same, so
H = Va² sin²30 / 2g = Vb² sin²60 / 2g
Va²/Vb² = sin²60/ sin²30
Va/Vb = 3:1
Thus, the correct option is A.
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A spring with constant 185 N/m is compressed 1.38 m with a mass of 0.53 kg. How fast is it going 2.5 m above the ground?
The velocity 2.5 m above the ground will be 49.07 m/sec.
What is spring force?
The force required to extend or compress a spring by some distance scales linearly concerning that distance is known as the spring force. Its formula is;
F = kx
The formula for force is;
F=ma
Equating both the equation;
ma = kx
a=kx/m
a=( 185 N/m × 1.38 m) / 0.53
a = 481.6 m/s²
The speed is found by Newton's third equation of motion;
v²=u²+2as
v²=0+2as
v²=2 × 481.6 m/s² × 2.5 m
v = 49.07 m/sec
Hence the velocity 2.5 m above the ground will be 49.07 m/sec.
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Which of the following would increase the amount of electricity generated by a wind turbine
Higher wind speeds would increase the amount of electricity generated by a wind turbine.
What is a power plant?A power plant is an industrial structure that generates electricity. The majority of power plants are linked to the electrical grid.
Stronger winds produce greater power because they enable the blades to revolve more quickly. Greater mechanical and electrical power from the generator result from faster spinning.
Hence, higher wind speeds would increase the amount of electricity generated by a wind turbine.
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How many electrons or protons are found in: a). +1 C of charge? b). -1 C of charge? c. -1.6 x 10^-6 C of charge? a)
Answer:
50 charges
Explanation:
it will deduct and mutiple it self and divide
Which vector shows the velocity of the yo-yo at this moment?
The vector which shows the velocity of the yo-yo at this moment is A and is denoted as option A.
What is Velocity?This is referred to the rate of change of distance with time and the unit is metre per seconds.
A shows the direction of motion is same as the direction of velocity and is the tangent at that particular point hence why it was chosen as the most appropriate choice.
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A hiker travels 12 km in a direction of 50 degrees west of north. What are the north and west components of this displacement?
The north and west components of this displacement are 9.19 km and -7.71 km respectively.
North component of the displacement
The north component of the displacement is calculated as follows;
Dy = D sinθ
Dy = 12 km x sin50
Dy = 9.19 km
West component of the displacementDx = D x cosθ
Dx = - 12 km x cos(50)
Dx = -7.71 km
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look at picture below !! please <3
Answer:
C
Explanation:
compound is a substance made from two or more different elements that have been chemically joined
Average speed equals distance divided by time. on a journey to the
alpha centauri star system, a space probe travels a distance of
meters in 1.73x10 10 seconds. (a) find its average speed in
meters per second. (b) how long did the journey take in years? use
365.24 days per year.
4.12x1016
2e-12%
The average speed will be 2.38×10⁶ m/sec.The average speed of an object indicates the pace at which it will traverse a distance. The metric unit of speed is the meter per second.
What is the average speed?The total distance traveled by an object divided by the total time taken is the average speed.
The speed calculated at any particular instant of time is known as the instantaneous speed.
Given data;
Distance travelled = 4.12x10¹⁶ meter
Time period= 1.73x10¹⁰ sec
The average speed is found as
[tex]\rm V_{avg}= \frac{d}{t} \\\\\ \rm V_{avg}= \frac{4.12 \times 10^{16}}{1.73 \times 10^{10} } \\\\\ V_{avg}=2.38 \times 10^6 \ m/sec[/tex]
Hence, the average speed will be 2.38×10⁶ m/sec.
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A car accelerates from a standstill to 60 km/hr in 10.0 seconds. What is its acceleration?
The acceleration of the car is 1.66 m per sec square.
How to calculate acceleration?The rate at which an item changes its velocity is known as acceleration, a vector quantity. If an object's velocity is changing, it is accelerating.
Initial velocity=0
Final velocity= 60km/hr
To convert it into m/sec
1 km=1000 m
1 hr=3600 sec
So= (60×1000)÷3600=16.66 m/sec
time=10 sec
We know that acceleration is the rate of change of velocity per unit of time.
acceleration=(final velocity-initial velocity)÷ time taken
= (16.66-0)÷10
= 1.66 m per sec square
So, Acceleration will be, 1.66 m per sec square
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Trivia Time!! At what velocity does light move?
Explanation:
Light Light from a moving source travels at 300,000 km/sec (186,000 miles/sec).
Note:
The Speed of Light Is Constant.
Explanation:
LIGHT TRAVELS AT A CONSTANT VELOCITY OF 300,000 km/sec.
A farenhights thermometer shaded from the sun to a hot day reads 101 degree what is the temperature of dry ice -80degree celcuis on the farenhights scale
Dry ice is cold, extremely cold. Ice has a surface temperature of -109.8 degrees Fahrenheit or -78.5 degrees Celsius (197.85 Kelvins).
-109.8 Fahrenheit is the sublimation temperature of dry ice on the surface where ice meets with its surrounding atmosphere(Air).on the inside it can be even colder. Due to these temperatures, its management requires extreme care.The surface temp of dry ice is much colder than the lowest temperature any average person would encounter in their lifetime. The coldest temperature ever recorded in the contiguous US is 40 degrees warmer than it. But it is also worth noting that the lowest temperature ever reliably recorded on Earth (at the Soviet Vostok Station in Antarctica) is around 20 °F below what solid CO2 is.hence, Ice has a surface temperature of -109.8 degrees Fahrenheit
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A bus start from rest. If the acceleration of bus is 0.5 m/s square. what will be its velocity at the end of 2 minutes?what will be the distance cover?
Answer:
3586
Explanation:
by using formula s=it+0.5at^2
Answer:
[tex]\fbox {Velocity = 60 m/s, Distance = 3600 m}[/tex]
Explanation:
Part (i) : Velocity at end of 2 minutes
Equation used ⇒ [tex]\boxed {v = u + at}[/tex]
⇒ t = 2 minutes = 2 x 60 = 120 seconds
⇒ v = 0 + (0.5)(120)
⇒ v = 60 m/s
Part (ii) : Distance covered
Equation used ⇒ [tex]\boxed {S = \frac{v^{2}-u^{2}}{2a}}[/tex]
⇒ S = (60)² - (0)² / 2(0.5)
⇒ S = 3600 m
what is the gravitational field strength at a distance of 60.0 km above the surface of the earth
Answer:
g=9.64m/s^2.
Explanation:
Gravitational field strength (in other words, gravitational acceleration) is given as follows:g=GMR2g=R2GMwhere G=6.674×10−11m3kg⋅s2G=6.674×10−11kg⋅s2m3 is the gravitational constant, M=5.972×1024kgM=5.972×1024kg is the mass of the Earth, and R=6.371×106m+0.06×106m=6.431×106mR=6.371×106m+0.06×106m=6.431×106m is the distance from the center of the Earth to the required point above the surface (radius plus 60 km).
G = 9.4 m/s²
What is gravitational acceleration?Gravitational acceleration (symbolized g) is an expression used in physics to indicate the intensity of a gravitational field.
It is expressed in meters per second squared (m/s²).
At the surface of the earth, 1 g is about 9.8 m/s 2 .
According to the question,
Gravitational field strength is given as follows:
[tex]g = \dfrac{GM}{R^2}[/tex]
Where[tex]G = 6.674\times 10^{-11}\dfrac{m^3}{kg\cdot s^2}[/tex] is the gravitational constant,
[tex]M = 5.972\times 10^{24}kg[/tex] is the mass of the Earth,
and [tex]R = 6.371\times 10^{6}m + 0.06\times 10^{6}m = 6.431\times 10^{6}m[/tex]
Here, m is the distance from the center of the Earth to the required point above the surface (radius plus 60 km).
Thus, obtain:
[tex]g = \dfrac{6.674\times 10^{-11}\cdot 5.972\times 10^{24}}{(6.431\times 10^{6})^2} \approx 9.64m/s^2[/tex]
g ≈9.64m/s 2
Therefore ,
The gravitational field strength is g = [tex]9.64m/s^2[/tex]
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.
two conducting spheres
Answer:
[tex]\fbox {F: +3C, G: +3C}[/tex]
Explanation:
When two conducting spheres come in contact, their charges will become the mean of their charges. This takes place by the transfer of charges from the greater charged sphere to the lesser charged one.
Then :
⇒ F + G / 2
⇒ -14 + 20 / 2
⇒ 6/2
⇒ 3C
∴ Hence, both sphere F and sphere G will have a charge of +3 C.
My predicted height was lower than the final height i measured. this is because friction slowed the puck as it was sliding along the track. do you agree or disagree with khadija
I disagree since friction will cause the ultimate height to be lower than what was anticipated. To reduce the height, resist the action.
What is the height?
The vertical distance between an object's top and the bottom is defined as its height.
It is measured in centimeters, inches, meters, and other units. The height of the cliff is obtained by the Newton equation of motion.
My actual height was less than what I had anticipated. this is because the puck's movement along the track was impeded by friction.
To the Khalida, I object. Disagree, since friction will cause the ultimate height to be lower than the anticipated height. To reduce the height, resist the action.
Hence, I disagree with Khalida.
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Question 1 of 10
What is the magnitude of the vector described below?
"13 m/s to the east"
A. Meters per second
B. Meters
C. East
D. 13 m/s
Answer:
D
Explanation:
The magnitude is 13 m/s
the direction is east the units are m/s
Which two changes would decrease the electric force between two charged particles? A. Decrease the charge of one of the particles. B. Increase the charge of one of the particles. C. Increase the distance between the particles. D. Decrease the distance between the particles. E. Increase the charge of both particles. Which two changes would decrease the electric force between two charged particles ? A. Decrease the charge of one of the particles . B. Increase the charge of one of the particles . C. Increase the distance between the particles . D. Decrease the distance between the particles . E. Increase the charge of both particles .
Answer:
A C
Explanation:
F = C q1q2/r^2 means that decreasing the charge (s) or increasing distance will decrease force
A C
Which would most likely cause a decrease in the rate of energy production in a fusion nuclear reactor? a drop in the temperature in the reactor an increase in the number of neutrons in the reactor an increase in the amount of nuclear fuel used in the reactor a drop in the number of reactions that involve the splitting of nuclei
A drop in temperature would most likely result in a decline in the rate of energy production in a fusion nuclear reactor.
What is nuclear power?The utilization of nuclear reactions to generate energy is known as nuclear power.
Nuclear power facilities produce the great bulk of the electricity generated by nuclear fission of uranium and plutonium.
The environment should be hot enough for the deuterium and tritium ions' kinetic energies to be sufficient to break through the Coulomb barrier and fuse together.
Therefore, a decrease in temperature would most likely cause a decrease in the rate of energy production in a fusion nuclear reactor.
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A simulation shows whether changing various weather conditions increases
the likelihood that a hurricane will form. which type of model is this?
a. it is physical.
b. it is computer-generated.
c. it is mathematical.
d. it is conceptual.
Answer:I don’t know
Explanation:
i don’t know
give two reasons why carbon brushes and commutators are made of graphite?
Answer:
Graphite is a good conductor of electricity
it allows easy shift of current between the comm
Explanation:
A car accelerates at a rate of 8.8 m/s² with a force from the tires of 15,840 N.
What is the mass of the car?
Answer:
1,800kg
Explanation:
Force = Mass x Acceleration
F = m x a
15840N = m x 8.8
8.8 x m = 15840
m = 15840/8.8
= 1,800kg
Answer:
[tex]\displaystyle 1800\:kg.[/tex]
Explanation:
[tex]\displaystyle am = F_{net} \\ \\ \frac{15840}{8,8} = \frac{8,8m}{8,8} \\ \\ \boxed{1800 = m}[/tex]
I am joyous to assist you at any time.
Analyze the relationship between total internal reflection and the critical angle.
Answer:
5.15 when the angle of incidence is equal to critical angle the angle of reflection is equal to 90 if the angle of incidence is bigger than the critical anger the reflected ray will not emerge from the medium but will be reflected back into the medium this is called total internet reflection
Explanation:
hope it's helpful
You should switch your headlights from high beam to low beam when a vehicle approaching from the opposite direction gets no closer than____ feet away from you.
You should switch your headlights from high beam to low beam when a vehicle approaching from the opposite direction gets no closer than 492.126 feet away from you.
What is a low beam?Low beams, often known as dipped beams have a close-range focus. The most crucial and commonly utilized beam in an automobile is the low beam.
When a car coming from the other direction is no closer than 492.126 feet away from you, you should lower your headlights from high to low beam.
Hence, a vehicle approaching from the opposite direction gets no closer than 492.126 feet away from you.
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A.
emotional health : expressing feelings
B.
physical health : respecting others
C.
mental health : living in harmony with the environment
D.
social health : getting adequate sleep
Emotional health: expressing feelings is the phrases that belong together. The best answer from the choices provided willl be A.
What is good Health?The condition of complete physical, mental, and the absence of sickness and disability is called good health.
Which of the following phrases belong together?
A.
emotional health: expressing feelings
B.
physical well-being: regard for others
C.
Social health: obtaining enough sleep
D
Mental health: living in harmony with the environment
The concepts "emotional wellness" and "expressing feelings" go hand in hand. The best response from the available options is going to be A.
Hence, the best answer from the choices provided willl be A.
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In what direction does an omnidirectional antenna radiate radio frequency (rf) energy?
An omnidirectional antenna radiates radio frequency (rf) energy equally in all directions around its axis.
What is omnidirectional antenna?An omnidirectional antenna is an antenna which radiates radio frequency (rf) energy equally in all directions around its axis.
Radio frequency energy is a form of electromagnetic radiation.
An antenna receives as well as sends out radio frequency energy.
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