The diagram below illustrates the law of reflection.
Incoming
light
Mirror
According to the law of reflection, which statement must be true?
The measure of angle A equals the measure of angle B.
The measure of angle B equals the measure of angle C.
The measure of angle A equals the measure of angle C.
-- -- ------ --- ----
Answer: B) The measure of angle B equals the measure of angle C.
How much work is done by gravity when a pine cone (of mass 50g) falls from the top of a tree, 9 m high?
Answer: 4.41 joules
Explanation:
Given that:
work is done by gravity = ?
Mass of pine cone (m) = 50g
Convert mass in grams to kilograms
Since 1000g = 1kg
50g = (50/1000) = 0.05kg
Height of tree (h) = 9 m
Apply the formula for work,
Work = mass x acceleration due to gravity x height
Acceleration due to gravity has a value of 9.8m/s^2
Work = mgh
Work = 0.05kg x 9.8ms^2 x 9m
Work = 4.41J
Thus, 4.41 joules of work is done by gravity.
Answer:
4.5 J
Explanation:
I took the test
please help i don’t get this
Answer:
i think it is with friction because when we move we go against friction so like when were walking friction is trying to decrease our speed
Explanation:
A bowling ball has a mass of 1.7 The ball leaves a bowler's hand at a speed of 7.0 m/s calculate the kinetic energy of the bowling ball (I NEED QUICK ANSWERS PLEASE)
Answer:
the answer is 41.65 J
Final answer:
The kinetic energy of a bowling ball with a mass of 1.7 kg and a velocity of 7.0 m/s is calculated using the kinetic energy formula KE = 1/2 mv^2, resulting in a kinetic energy of 41.65 joules.
Explanation:
The subject of this question is physics, specifically covering the topic of kinetic energy which is a part of mechanical energy. The grade level of this question is high school. To calculate the kinetic energy of the bowling ball, we use the kinetic energy formula:
KE = ½ mv² where KE is kinetic energy, m is mass in kilograms, and v is velocity in meters per second.
Plugging in the given values (mass m = 1.7 kg, velocity v = 7.0 m/s), the calculation is as follows:
KE = ½ × 1.7 kg × (7.0 m/s)²
KE = 0.85 kg × 49 m²/s²
KE = 41.65 joules
So, the kinetic energy of the bowling ball is 41.65 joules.
What is one difference between an electromagnetic wave and a mechanical wave?
A
An electromagnetic wave can travel through a vacuum. A mechanical wave must have a medium to travel through.
B
An electromagnetic wave moves parallel to the direction of the wave's travel. A mechanical wave can move only perpendicular to the direction of the wave's travel.
C
An electromagnetic wave moves perpendicular to the direction of the wave's travel. A mechanical wave can move only parallel to the direction of the wave's travel.
D
A mechanical wave can travel through a vacuum. An electromagnetic wave must have a medium to travel through.
An electromagnetic wave can travel through a vacuum without a medium, while a mechanical wave requires a medium to propagate. The answer is option D.
One difference between an electromagnetic wave and a mechanical wave is how they propagate through space. An electromagnetic wave can travel through a vacuum without the need for a medium, whereas a mechanical wave must have a medium like air, water, or solids to travel through. This is because electromagnetic waves, which include light waves, are composed of oscillating electric and magnetic fields that can generate each other, whereas mechanical waves, like sound waves, rely on the vibration of particles in a medium to propagate.
Which lenses are convex? Check all that apply. 1 2 3 4 5 6
Answer:
1,2,3,6
Explanation:
This is correct because i took the quiz and got it correct
1 2 3 and 6 are convex lenses.
What is convex lenses?The convex lens is a lens that converges rays of light that convey parallel to its principal axis (i.e. converges the incident rays towards the principal axis) which is relatively thick across the middle and thin at the lower and upper edges. The edges are curved outward rather than inward.To learn more about The convex lens refer:https://brainly.com/question/26961264
#SPJ2
Calculate the braking distance for a vehicle traveling at 30 mi/h (13.4 m/s) with an acceleration of - 9.0 (m/s)/s while breaking.
Answer:
Braking distance of vehicle is 9.97 m
Explanation:
It is given initial velocity of the vehicle u = 13.4 m/sec
Acceleration of the vehicle [tex]a=-9m/sec^2[/tex]
As the vehicle finally stops so final velocity of the vehicle v = 0 m/sec
We have to find the braking distance s
From third equation of motion
[tex]v^2=u^2+2as[/tex]
[tex]0^2=13.4^2+2\times -9\times s[/tex]
s = 9.97 m
So braking distance of the vehicle is 9.97 m
The nervous system produces a response in your body in about 10 seconds.
O A. True
OB. False
Answer:
False
Explanation:
It takes a bout 0.3 seconded for your body to response
Answer:
⊙false
Explanation:
Hope it help
What type of conversion is taking place when natural gas is used to heat water?
a chemical energy into thermal energy
b. thermal energy into mechanical energy
mechanical energy into electromagnetic energy
d electromagnetic energy into chemical energy
Please select the best answer from the choices provided
OOOO
When natural gas is used to heat water, a conversion of chemical energy into thermal energy is taking place. The Option A.
What type of energy conversion is it?In this process, natural gas which contains stored chemical energy undergoes combustion in a water heater. This combustion releases heat energy which is transferred to the water, raising its temperature.
The chemical energy in the natural gas is transformed into thermal energy leading to hot water for various domestic purposes such as bathing and heating.
This conversion helps in household heating systems and makes efficient use of the chemical energy stored in natural gas to provide thermal comfort and convenience in homes.
Read more about energy conversion://brainly.com/question/961052
#SPJ3
The conversion taking place when natural gas is used to heat water is 'chemical energy into thermal energy'. The energy from the chemical bonds in natural gas is released and changed to heat, which warms the water.
Explanation:When natural gas is used to heat water, the type of conversion taking place is 'a chemical energy into thermal energy'. This happens because natural gas, a fossil fuel, is burned in this process. The energy stored in the chemical bonds of the gas is released and converted to thermal energy (heat), which is used to warm up the water.
Learn more about energy conversion here:https://brainly.com/question/20458806
#SPJ3
Find the acceleration of the change in personality is 5M/S and the time is 10 seconds
There is a misspelling: "change in personality is 5M/S". It should be "change in velocity is 5m/s"
Answer: 0.5 m/s^2
Explanation:
acceleration = ?
change in velocity = 5m/s
Time = 10 seconds
Acceleration is the rate of change of velocity per unit time. it is measured in metres per second square.
i.e Acc = (change in velocity) time
Acc = 5m/s / 10 seconds
Acc = 0.5 m/s^2
Thus, the acceleration is 0.5 m/s^2
a car is moving at 5.82 m/s when it accelerates 2.35m/s^2 for 3.25s. what is its final velocity?
Answer: 13.46 m/s
Explanation:
Initial velocity V1 = 5.82 m/s
acceleration A = 2.35m/s^2
Time taken T = 3.25s
Final velocity V2 = ?
Recall that acceleration is the rate of change of velocity per unit time i.e acceleration = (V2 - V1)/T
2.35m/s^2 = (V2 - 5.82 m/s) / 3.25s
cross multiply
2.35m/s^2 x 3.25s = (V2 - 5.82 m/s)
7.6375m/s = V2 - 5.82 m/s
V2 = 7.6375m/s + 5.82m/s
V2 = 13.46 m/s
Thus, the car final velocity is 13.46 m/s
Answer:
The final velocity is 13.5m/s
Explanation:
a = (v-u)/t
2.35 = (v-5.82) / 3.25
7.6375 = v - 5.82
v = 7.6375 + 5.82
v = 13.5 m/s
Explain why the stars look different between Jane and John
1. The experiment shown below is finished. What can you conclude from these results?
Daily water: 90 mL
Daily water: 50 ml
Daily water: 10 mL
Seed C
Seed C
Seed C
Sprouts: 16
Sprouts 12
Sprouts: 0
Heat: Medium (24 °C)
Heat: Medium (24 °C)
2
Heat: Medium (24 °C)
3
O A. Seed C germinates more with more light
O B. Seed C germinates more with less light.
O C. Seed C germinates more with more water.
OD Seed Caerminates more with less water.
Answer:
C. Seed C germinates more with more water.
Explanation:
In this experiment, the seed (seed C) was subjected to certain conditions and the result is what has been presented for us to make an inference.
We observe the following from the information given us:
I. the same seeds were used for the experiment
II. the same heat medium of 24 °C was used for all the seeds
III. different daily amount of water was supplied the seeds - 90 ml, 50 ml and 10 ml
From the experiment, we have this result:
the seed that was watered with 10 ml daily did not sprout anything, the seed that was watered with 50 ml daily yielded 12 sprouts while the seed that was watered with 90 ml daily yielded 16 sprouts
When we consider the amount of water given the seed & the produce of the seed, it is safe to conclude that with increase in daily water, there is increase in the number of sprouts by the seed
Hence, C. Seed C germinates more with more water is the correct answer
The given experiment shows that Seed C's germination is directly proportional to the amount of water it receives. More water results in more sprouts.
Explanation:From the given experiment results, the conclusion can be drawn that Seed C germinates more with more water. This is evident as the seed sprouted 16 times with a daily water method of 90 mL, 12 times with 50 mL, and not at all with 10 mL. So, the amount of sprouts is directly proportional to the amount of water provided, the more the water, the more the sprouts. This supports the option that Seed C germinates more with more water. Also, the heat was kept constant to ensure that it doesn't affect the experiment results.
Learn more about Seed Germination here:https://brainly.com/question/23561613
#SPJ3
Students created a drawing to represent waves traveling along a slinky spring.
Which of the following accurately describes the properties of a wave if the students decided to increase the energy transmitted by the wave?
A) The frequency of the wave would increase and the wavelength would decreases
B) The frequency of the wave would decrease and the wavelength would increases
Eliminate
C) The frequency of the wave would increase and the wavelength would increases
D) The frequency of the wave would decrease and the wavelength would decreases
Answer:
The answer is A.
Explanation:
Since you're increasing the energy, the frequency would start increasing. The wavelength would start decreasing, since you're putting more energy into the slinky and making it go faster and faster.
5. Because velocity is a _____ quantity, ______ matters.
Answer:
First blank is Speed, The Second Blank is Mass
Explanation:
Velocity is always speed and for mass thats just what they taught us>>>
Because velocity is a vector quantity, direction matters.
What is velocity?Velocity is the rate of change of displacement. It is essentially a vector quantity.
Speed of an object moving can never be negative. The velocity of a moving object can be zero.
Speed gives us an idea of how fast an object is moving whereas velocity not only tells us its speed but also tells us the direction the body is moving in.
Initial velocity describes how fast an object travels when gravity first applies force on the object. On the other hand, the final velocity is a vector quantity that measures the speed and direction of a moving body after it has reached its maximum acceleration.
The motion with constant velocity is the simplest form of motion.
What is vector quantity?Vector is the quantity that has both magnitude and direction. For example, displacement, force, torque, momentum, acceleration, velocity, etc.
Thus, velocity has speed as well as direction, so it is vector quantity.
To learn more about Velocity here
https://brainly.com/question/18084516
#SPJ2
Rank the nonmetals in each set from most reactive (1) to least reactive (3).
Bromine:
Chlorine:
Iodine:
Answer:
Bromine: 2 Chlorine: 1 Iodine: 3
Explanation:
hope this helps yall
Answer:
Bromine:
2
Chlorine:
1
Iodine:
3
Explanation:
How far does a car in 90 sec if it is traveling at a speed of 55m/s show equation
Answer:
4950 meters
Explanation:
Recall that the formula for the speed (v) is given by the quotient of the distance traveled (d) divided by the time (t) it took to cover that distance:
[tex]v=\frac{d}{t}[/tex]
Therefore, for this case in which the car travels at 55 m/s for 90 seconds, we can replace these values in the formula, and solve for the distance covered:
[tex]v =\frac{d}{t} \\55 \frac{m}{s} =\frac{d}{90\,s} \\d=55*90 m\\\\d=4950\,m[/tex]
The iron ball is suspended from a box that floats in water.The box has a height of 5.00 cm, a face area of 10.0 cm2, and a density of 0.30 g/cm3, and 2.00cm of its height is above the water surface. What’s the radius of the ball?
Answer:
The iron ball is suspended from a box that floats in water. The box has a height of 5.00 cm, a face area of 10.0 cm 2 , and a density of 0.30 g/cm3, and 2.00 cm of its height is above the water surface. What’s the radius of the ball? Hints: ❏ Identify all forces acting on the box and write Newton’s second law. ❏ The box is stationary, which means the forces (including buoyant force) are balanced. You can use this to find tension in the rope. ❏ Identify all forces acting on the ball and write Newton’s second law. ❏ Iron ball is stationary, which means the forces (including buoyant force) are balanced.
Step by step:
Closer to a point charge, the electrostatic field created is.
A. Stronger
b . Weaker
Answer:
stronger
Explanation:
its stronger because I don't have a good life for you guys but if I don't have a chance for it I can do it for you and I can get it to work on my own and then I can get a better idea
Final answer:
The electrostatic field created by a point charge is stronger the closer you are to the charge, due to the inverse relationship between field strength and distance. So the correct answer is option A.
Explanation:
The electrostatic field created by a point charge is stronger the closer you are to the charge. This is because the strength of the electrostatic field depends on the distance from the point charge, as described by Coulomb's Law. As the distance between charges decreases, the electrostatic force increases, resulting in a stronger field. When considering two unlike charges, the fields add together and become even stronger in the region between them because the fields from each charge are in the same direction. Conversely, the field is weaker at large distances, where the fields of individual charges may oppose each other, leading to a net effect of a weaker field. Examples from figures showing the electric fields demonstrate that field lines are closer together where the field is stronger, and farther apart where the field is weaker.
A _______ is a tool often used to measure the amount of force exerted by an object
Answer:
Force meter
Explanation:
Answer:
.o.o
Explanation:
678
Define temperature using molecular theory
Answer: At the molecular level, temperature is related to the random motions of the particles (atoms and molecules) in matter. ... The temperature of the puddle, or of any object, is a measure of the average of the individual translational energies of all of its atoms or molecules.
Explanation: my science teacher already tought us this
88 kg fullback moving east with a speed of 5.0 m/s is tackled by a 97 kg opponent running west at
3.0 m/s, and the collision is perfectly inelastic. What is the speed of the players just after the tackle?
A) 149 m/s
B) 23.1 m/s
C) 7.31 m/s
D) 0.81 m/s
The speed of the players just after the collision is (D) 0.81 m/s
Inelastic collision:Given that the mass of the fullback is m = 88kg
mass of the opponent, M = 97 kg
speed of the fullback, u = 5 m/s
speed of the opponent, U = 3 m/s
In an inelastic collision, the two bodies move together at the same speed and the total momentum of the system remains conserved.
Let the final speed be v, then by conserving the momentum we get:
mu - MU = (m + M)v
Since the opponent must be moving in opposite direction to the fullback, therefore his momentum is -MU.
88×5 - 97×3 = (88 +97)v
149 = 185v
v = 0.81 m/s
So both the players move with a speed of 0.81 m/s
Learn more about inelastic collision: https://brainly.com/question/2356330?referrer=searchResults
Which of the following is an example of a pull? A. Doing pushups b. Playing catch with a baseball c. Walking up a staircase d. Reeling in a fish with a fishing pole
Answer:
D, reeling in a fish
Explanation:
Answer:the answer is D. Reeling in a fish with a fishing pole
Explanation:
you have to pull on the fish with the fishing pole in order to catch the fish
hope this helps
mark brainliest pleaseHow do lines of latitude affect how direct or indirect the Sun’s rays are on the Earth?
The greater the force squeezing 2 surfaces together, the smaller the
friction force. *
True
False
Answer:
False
Explanation:
It is false because the greater the force, the greater the friction.
It takes 3 minutes to make toast in a 1500 watt toaster. Calculate how much work is done by the toaster.
Answer: 2.7 x 10^5 joules
Explanation:
Given that:
Time taken = 3 minutes
convert time in minutes to seconds
(Since 1 minute = 60 seconds
3 minutes = 3 x 60 = 180 seconds)
Power of toaster = 1500 watt
Work done by the toaster = ?
Recall that power is the rate of work done per unit time
i.e Power = work/time
work = Power x Time
Work = 1500 watt x 180 seconds
Work = 270000J
Place the result in standard form
270000J = 2.7 x 10^5J
Thus, 2.7 x 10^5 joules of work is done by the toaster.
29. If you traveled to Mars, your mass would be
than your mass on Earth. *
If you traveled to Mars, your mass would be exactly, precisely equal to your mass on Earth, PROVIDED you did not relieve the boredom of space travel by eating too many astronaut steaks along the way.
The only things that can affect your mass are your personal diet, exercise, sleep, and stress habits.
Your mass has nothing to do with gravity. Your WEIGHT has.
can any help me with this ?
Answer:
Sure i can help you
Explanation:
6) The force pairs are drawn on the diagram to the left.
a. What is the action force acting on
The Rocket pushes out gas
b. What is the reaction force acting on?
Gas on the rocket
C. If the forces are equal and opposite why does the rocket ship move?
Answer: Rocket Is its own system, So gas creates outside force on the rocket
A worker pushes a box across the floor to the right at a constant speed with a force of 25N. What
can you conclude about the box? *
An unbalanced force of 25N is acting on the box.
Friction between the box and the floor is 25N to the left
The net horizontal force acting on the box is 50N.
Answer:
Friction between the box and the floor is 25N to the left
Explanation:
There are two forces acting on the box along the horizontal direction:
- The force of push applied by the worker, in the forward direction, F
- The force of friction, [tex]F_f[/tex], acting in the opposite direction (backward)
So the net force acting on the box is
[tex]F_{net}=F-F_f[/tex]
According to Newton's second law of motion, the net force on an object is equal to the product between its mass (m) and its acceleration (a), so we can write:
[tex]F_{net}=ma[/tex]
And so
[tex]F-F_f = ma[/tex]
However, in this case the box is moving at constant speed; this means that its acceleration is zero:
[tex]a=0[/tex]
Therefore we have:
[tex]F-F_f=0[/tex]
Which means
[tex]F_f=F[/tex]
And since we are told that
[tex]F=25 N[/tex]
This means that the force of friction is also 25 N:
[tex]F_f=F=25 N[/tex]
Answer:
C.Friction between the box and the floor is 25N to the left.
Explanation:
One can conclude that the friction between the box and the floor is 25N to the left.
Frictional force is a force that opposes motion of a body. It acts in the opposite direction as the net force applied on a body.
According to newton's third law of motion "action and reaction are equal and opposite in magnitude and direction".The action force is to right and the reaction force is to the left.Please hurry need ASAP!!! The diagram represents a diver's motion from the top of a high diving board into a
pool of water. At what point does the diver have the greatest kinetic energy and the
least potential energy?
1
2
3
4
Answer:
Position 3 has the most kinetic energy
Position 1 has the least potential energy
Explanation:
Kinetic energy: It is the moust because the iver is falling straight down
Potential energy: It is the least because of how he is positioned, it's nearly straight.
The point at which the diver has the greatest kinetic energy and the least potential energy is at point 4.
To explain why, let's break down the concepts of kinetic and potential energy in the context of the diver's motion.
1. Kinetic Energy (KE): This is the energy associated with an object in motion. It depends on both the mass of the object and its velocity. KE = (1/2)mv^2, where "m" is the mass and "v" is the velocity.
2. Potential Energy (PE): In the case of a diver on a diving board, potential energy is gravitational potential energy. It is the energy an object has due to its position relative to a reference point (usually the ground). PE = mgh, where "m" is the mass, "g" is the acceleration due to gravity, and "h" is the height above the reference point.
At point 1, the diver is at the highest point on the diving board. Therefore, the potential energy is at its maximum because the height above the reference point (the water surface) is the greatest. At this point, the diver has little or no kinetic energy because they are momentarily at rest.
As the diver descends from point 1 to point 4, their height above the water decreases, reducing their potential energy. Simultaneously, their velocity increases, which means their kinetic energy also increases.
At point 4, the diver is at the lowest point of their dive, very close to the water surface. Here, their potential energy is minimal, as they are close to the reference point. At the same time, their velocity is at its maximum, resulting in the highest kinetic energy.
In conclusion, point 4 represents the moment of the greatest kinetic energy and the least potential energy because the diver is in rapid motion close to the water's surface, having converted most of their potential energy into kinetic energy during the dive.
For more such questions on kinetic energy:
https://brainly.com/question/8101588
#SPJ2