Momentum
eastward = +
westward = -
[tex]\tt P_A=5\times 2=10~kg.m/s\\\\P_B=2\times 5=-10~kg.m/s[/tex]
total momentum:
[tex]\tt P_A+P_B=10-10=0~kg.m/s[/tex]
Think about the questions below. You will be reporting the answers in your summary. Write your summary in the essay box below.
What kind of energy transformation is occurring?
How much water was melted by the incandescent light bulb? By the CFL?
How do you explain the difference in the amount of water?
Which light bulb do you think is more energy efficient?
Research incandescent bulbs and CFLs. Write a 150 word summary describing how each bulb works and include the answers to the questions above.
Let there be light! At the flick of a switch, a light bulb can light or illuminate an entire room, but what else is happening? One the basic laws of physics, the conservation of energy, tells us that energy is neither created nor destroyed: rather, it can only be transformed from one form to another. In the case of the light bulb, electrical energy is being transformed into light and thermal (heat) energy. Different wattages and types of bulbs give off varying amounts of light and heat. In this light bulb science project, we'll be working with incandescent and compact fluorescent lamp bulbs (CFL’s).
If a car is moving +14m/s is to stop within 2 seconds, what must the car's acceleration be?
Acceleration is -7 m/s²
Explanation:
initial velocity (u) = 14 m/s
since it's gonna stop,
final velocity (v) = 0m/s
time taken(t) = 2 seconds
now,
a = (v-u)/t
or, a = (0-14)/2
or, a = -14/2
a = -7m/s²
Which line shows the object is moving at its fastest rate of speed?
Answer:
Line C
Explanation:
Hi there!
Speed is equal to Distance divided by Time:
speed = distance / time
Notice how distance is the dependent value on the graph, lying on the y-axis, and time is the independent value on the graph, lying on the x-axis.
The slope of a line is equal to Rise divided by Run:
slope = rise / run
"Rise" means the number of units the line travels up in the y-direction and "run" means the number of units the line travels to the right in the x-direction.
This makes the "rise" of the line equivalent to the distance, and the "run" of the line equivalent to time.
Therefore, speed = slope.
To find the line that shows the object moving at its fastest speed, we must find the line with the greatest slope (or the steepest going up).
That would be line C.
I hope this helps!
When a gas is transferred from one container into another container, which of the following does not occur? a. The gas flows into the new container. b. The gas changes shape to fit the new container. c. The gas spreads out to fill the new container. d. The gas keeps its original volume. Please select the best answer from the choices provided A B C D
Answer:
B.
Explanation:
Gases flow and spread easily in all directions until they reach the walls of the container. It can have a definite volume, but no definite shape.
.What is the mass of an object if it accelerates at 3 m/s2 and has a force of 1 N?
Answer:
1/3 kg
Explanation:
[tex]a = \frac{f}{m} = \frac{1}{3 }kg[/tex]
Hummingbirds may seem fragile, but their wings are capable of sustaining very large forces and accelerations. (Figure 1) shows data for the vertical position of the wing tip of a rufous hummingbird.
Acceleration is mathematically defined as; ΔV/t.
What is acceleration?Acceleration is defined as the ratio of the change in velocity to time. It is defined as the extent to which the velocity changes within a given time interval.
The question is incomplete so we can not arrive at the final answer. However, acceleration is mathematically defined as; ΔV/t.
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what is this math i do not get it pls helppppp
Answer:
where is the problem u need help with
Explanation:
(: pls mark brainliest
Answer: math is an area of knowledge that includes the study of such topics. as numbers and formulas related structures, algebra and geometry also calculus and analysis
Explanation:
Erik Erikson’s theory of psychosocial development emphasizes that development occurs by overcoming an emotional crisis in each of the eight stages of one’s lifetime. Please select the best answer from the choices provided T F.
Answer:
True
Explanation:
Answer:
The answer is T (True)
Explanation:
calculate the GPE of a rock with a mass of 55kg on a cliff that is 27m high
Answer:
P=mgh
P=mghm=55
P=mghm=55g=9.8 or ~10
P=mghm=55g=9.8 or ~10h=27
Explanation:
hope it will help you have a great day bye and Mark brainlist if the answer is correct
[tex]kai6417[/tex]
#carry on learning
An engineer is designing a runway. She knows that a plane, starting at rest, needs to reach a speed of 180mph at take-off. If the plane can reach this take-off speed in 65.0s, how far will the plane travel before take-off. Assume the plane increases speed steadily.
How far does the plane need to travel during take-off (in given units)?
ft
Could the plane take off on a 10000ft long runway?
Answer:
The plane would need to travel at least [tex]8,\!580\; {\rm ft}[/tex] ([tex]8.58 \times 10^{3}\; {\rm ft}[/tex].)
The [tex]10,\!000\; {\rm ft}[/tex] runway should be sufficient.
Explanation:
Convert unit of the the take-off velocity of this plane to [tex]\rm ft\cdot s^{-1}[/tex]:
[tex]\begin{aligned}v &= 180\; {\rm mph} \\ &= 180\; {\rm mi \cdot hrs^{-1}} \times \frac{1\; {\rm hrs}}{3600\; {\rm s}} \times \frac{5280\; {\rm ft}}{1\; {\rm mi}} \\ &= 264\; {\rm ft \cdot s^{-1}}\end{aligned}[/tex].
Initial velocity of the plane: [tex]u = 0\; {\rm ft \cdot s^{-1}}[/tex].
Take-off velocity of the plane [tex]v =264\; {\rm ft\cdot s^{-1}}[/tex].
Let [tex]x[/tex] denote the distance that the plane travelled along the runway. Since acceleration is constant but unknown, make use of the SUVAT equation [tex]x = ((u + v) / 2) \, t[/tex].
Notice that this equation does not require the value of acceleration. Rather, this equation make use of the fact that the distance travelled (under constant acceleration) is equal to duration [tex]t[/tex] times average velocity [tex](u + v) / 2[/tex].
The distance that the plane need to cover would be:
[tex]\begin{aligned}x &= \left(\frac{u + v}{2}\right)\, t \\ &= \frac{0\; {\rm ft \cdot s^{-1}} + 264\; {\rm ft \cdot s^{-1}}}{2} \times 65.0\; {\rm s} \\ &= 8.58\times 10^{3}\; {\rm ft}\end{aligned}[/tex].
The distance from the Sun where ice and gases become prevalent on a planet's surface relative to liquid water is defined as the ... A. frost line. B. neutrino line. C. liquid line. D. positron line.
The distance from the Sun where ice and gases become prevalent on a planet's surface relative to liquid water is defined as the frost line.
What is frost line
A frost line also known as frost depth or freezing depth, is the depth to which the groundwater in soil is expected to freeze.
It is the distance from the Sun where ice and gases become prevalent on a planet's surface relative to liquid water.
Thus, the distance from the Sun where ice and gases become prevalent on a planet's surface relative to liquid water is defined as the frost line.
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PLEASE HELP
What is the force on a 1 kg ball that is falling freely due to the pull of gravity on Earth?
Answer:
9.8 N downward
Explanation:
The weight force is defined as w = mg, where m is the mass of the object and g = 9.8 m/s^2. Plugging in values shows that the force exerted on the ball is 9.8 N, downwards toward the ground.
Difference between object distance and image distance within 4 points .(class 10)
The relationship between object distance, image distance, and focal length of a spherical mirror is given by
1/f=1/v+1/u
Where
f= focal length of a spherical mirror (distance between the pole and the principal focus of the mirror)
u= object distance (distance between pole and object)
v= image distance (the distance between pole and image)
A person walks up a stalled 10 m long escalator in 94 s. When standing on the same escalator, now moving, the person is carried up in 60 s. How much time would it take that person to walk up the moving escalator?
Answer:
V1 = S / t1 = speed up stalled escalator = 10/94 = .106 m/s
V2 = S / t2 = speed of escalator = 10 / 60 = .167 m/s
V = V1 + V2 combined speed
T = S / V = 1 / t1 + 1 / t2 = t1 * t2 / (t1 + t2)
T = 60 * 94 / (60 + 94) = 36.6 sec
Check: combined speed = .106 + .167 = .273 m/s
T = 10 / .273 = 36.6
An equal amount of a gas is held in two identical containers. The temperature of container 1 is 15°C and the temperature of container 2 is 30°C. In which container will the pressure be lowest? (Assume there is nothing else inside the containers.)
Answer:
Container 1
Explanation:
The reason why there will be less pressure in container 1 is that it's colder than container 2. You must have learned right, that a colder thing has its molecules less moving, and they don't expand, instead they actually decrease in volume? In the same way, it's applied to gas also. So that's why, because container 1 has 15C temperature, which is half less than container 2's 30C, that's why, container 1 has less pressure than Container 2.
So hence, container 1 has less pressure than container 2 because of its a lower temperature, which doesn't make the molecules expand, and move around that much.
THANKS!
the fluid speed v1=10 m/s at the large cross section A1 of diameter 8m. it flows in the narrow section of area A2 of diameter 4 m at speed V2. Calculate V2
Answer:
V1 A1 = V2 A2
V1 = 10m/s
A1 = 8m
10x8 =80
V2 =?
A2 = 4m
80 = V2 x 4
÷4
20 = V2
V2 =20m/s
Explanation:
If one halfs, the other doubles & vice versa. (Like inverse proportion or the reciprocal). That's why when you half 8m, the velocity doubles, on the other side. Then, balances out.
Hope this helps!
The Big Bang theory states that _____.
the universe was created from a cosmic explosion
the universe was formed from a collision between two galaxies
the universe is expanding and will continue to expand
the sun will eventually burn out and collapse
Answer:
A
Explanation:
The universe was created from a cosmic explosion.
A person throws a ball with a force of 140 N that accelerates at 15 m/s? What is the mass of the
ball?
Newton's 2nd law
[tex]\tt \sum F=m.a[/tex]
input the value:
[tex]\tt m=\dfrac{\Sum F}{a}=\dfrac{140~N}{15~m/s^2}=9.3~kg[/tex]
The mass of the ball, that person throws, is 9.33 kg.
What is force?The definition of force in physics is: The push or pull on a massed object changes its velocity. An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude.
The application of force is the location at which force is applied, and the direction in which the force is applied is known as the direction of the force.
A spring balance can be used to calculate the Force. Newton is the SI unit of force.
Force applied on the ball = 140 N.
Acceleration of the ball = 15 m/s².
According to Newton's 2nd law of motion:
Force = mass × acceleration
Mass = force ÷ acceleration
= 140 N ÷ 15 m/s²
= 9.33 kg.
Hence, the mass of the ball is 9.33 kg.
Learn more about force here:
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2. Jim and Sally went on vacation with their family. They took the family car and drove to the beach. The following
table displays data about a portion of their drive.
Motion of Car
Speed
Distance
0 meters
50 meters
100 meters
150 meters
meters
250 meters
Time
0.0 seconds
4.3 seconds
8.6 seconds
12.9 seconds
17.2 seconds
21.5 seconds
200
Which of the following statements best describe the motion of the car?
A. The car was speeding up.
B. The car was travelling at a constant speed.
C. The car was slowing down.
D. The car sped up and then slowed down.
What does the length of a velocity vector arrow represent
What is the momentum of a 12-kg object moving at 5.5 m/s?
Answer: 66 kg m/s
Explanation:
The equation for Momentum is
p=mv
where P is momentum
m is mass
and v is velocity (speed)
Since we have both mass and velocity all we have to do is multiply the mass and velocity to get momentum
12kg * 5.5 m/s = 66 kg m/s
You hold a softball in the palm of your hand and toss it up. Draw the diagrams while the ball is still touching your hands.
Please. help me with this question.
Answer:
When you push it hard enough, then force for the Bush is created than the fictional force. So that means that is net force Equus. If Bush minus the fiction force is very Dan zero, so that means that is mass times acceleration. So that's why it starts moving in the direction off the bush Boxee.
Explanation:
cual es la masa de los planetas, y la distancia que hay de la tierra a cada uno de ellos.
Ayuda pliss
Answer:
Mercurio
Masa
3,285 × 10^23 kg
Mercurio está a una distancia promedio de 48 millones de millas (77 millones de kilómetros) de la Tierra.
Venus
Masa
4.867 × 10^24kg
En su punto más cercano a la Tierra, Venus está a unos 61 millones de kilómetros (38 millones de millas) de distancia.
tierra
Masa
5.972 × 10^24kg
Marte
Masa
6,39 × 10^23 kg
La distancia mínima de la Tierra a Marte es de unos 54,6 millones de kilómetros (33,9 millones de millas).
Júpiter
Masa
1.898 × 10^27kg
Debido a que ambos planetas viajan en una trayectoria elíptica alrededor del sol, la distancia de Júpiter a la Tierra cambia constantemente. Cuando los dos planetas están en su punto más cercano, la distancia a Júpiter es de solo 365 millones de millas (588 millones de kilómetros).
Saturno
Masa
5.683 × 10^26kg
Su distancia más cercana a la Tierra es de aproximadamente 1.200 millones de kilómetros (746 millones de millas)
Urano
Masa
8.681 × 10^25kg
la distancia entre la Tierra y Urano cambia diariamente. Lo más cerca que están los dos es 1.600 millones de millas (2.600 millones de kilómetros).
Neptuno
Masa
1.024 × 10^26kg
Cuando Neptuno y la Tierra se alinean en el mismo lado del sol, en su punto más cercano, están a solo 2,700 millones de millas (4,300 millones de kilómetros)
masa de Plutón =
1.30900 × 10^22 kilogramos
Plutón se encuentra a 4670 millones de millas (7500 millones de kilómetros) de la Tierra. En su punto más cercano, los dos están a solo 2660 millones de millas (4280 millones de km) de distancia.
Select the correct answer. What has alternating electric and magnetic fields that travel in the form of a wave? A. Electromagnet B. Electromagnetic radiation C. Alternating current D. Direct current E. Static electricity.
Answer:
(B) electromagnetic radiation
Explanation:
Answer: B electromagnetic radiation
Explanation: hope this helps ik im a bit late though
Achild is pulling a toy train along the floor by a piece of string.
State one contact force and one non-contact force that acts on the toy
5. A whale swims due east for 5 km, turns around and goes west for 2 km
and finally turns north and swims for 4 km. What distance did the whale
travel?
Answer:
11km
Explanation:
5 + 4 + 2 = 11 (The whale traveled for 11km even if it changes direction)
Is hookes law applicable to all materil?
Answer:
Hooke’s law can be applied to all materials which come back to original shape upon withdrawal of the load. It is applicable to all materials which follow the linearity of stress and strain in the elastic limit. Any object made of steel or aluminum or any other metals that follows the stress-strain linearity in the elastic zone uses Hooke’s law.
Explanation:
Answer:
No.
Materials which obeys Hook's law are called elastic material.
Elastic material are material which return to their original shape and size after force deforming them is removed.
What would happen if the weather became very calm and the wind was not blowing for a few days around the wave hub?
PLEASE ANSWER ILL GIVE BRAINLIEST !!!!!
1. A rock of granite has a mass of 50 kg. if it’s weight in water
W2 = 380 N [ density = 1000 kg/m3] Calculate FB and the volume of the rock.[g =10 m/s2]
Answer:
The first part of the question is asking about BUOYANT FORCE or UPTHRUST.
Upthrust =TRUE WEIGHT-APPARENT WEIGHT
TRUE WEIGHT=mg
TRUE weight=50kg×10m/s²
=500N
upthrust=500N-380N
FB=120N
volume of the rock=mass/density.
since the granite is completely submerged, the volume of the displaced liquid will be equal to the volume of the body.
upthrust=Vdg
120N=V×1000kg/m³×10m/s²
120N=V×10000kg/m²s²
120/10000=V
v=0.012m³
please mark brainliest, hope it helped
what is the relationship between force and acceleration