Answer:
A. on both mass and velocity
Explanation:
Momentum depends upon the variables mass and velocity. In terms of an equation, the momentum of an object is equal to the mass of the object times the velocity of the object. The equation illustrates that momentum is directly proportional to an object's mass and directly proportional to the object's velocity.
PLEASE GIVE BRAINLIEST!!!Please can you help?? A skydiver is falling at terminal velocity when she opens her parachute. After a while she reaches a new terminal velocity. How does her new terminal velocity compare to her original terminal velocity?
a vector needs to be divided into components when ?
Answer:
Calculating the magnitude of a vector is only the beginning. The magnitude function opens the door to many possibilities, the first of which is normalization. Normalizing refers to the process of making something “standard” or, well, “normal.” In the case of vectors, let’s assume for the moment that a standard vector has a length of 1. To normalize a vector, therefore, is to take a vector of any length and, keeping it pointing in the same direction, change its length to 1, turning it into what is called a unit vector.To normalize a vector, simply divide each component by its magnitude. This is pretty intuitive. Say a vector is of length 5. Well, 5 divided by 5 is 1. So, looking at our right triangle, we then need to scale the hypotenuse down by dividing by 5. In that process the sides shrink, divided by 5 as well.
I hope this is helpful, Have a Great Day!!
How fast does lightning move?
90,000 miler per hour
125,000 miles per hour
175,000 miler per second
90,000 milers per second
Answer:
about 186,000 miles per second
Explanation:
so your closest bet is probably 175 miles per second
Answer:
Correct answer is 90,000 miles PER SECOND
Explanation:
A skateboard rolls off a horizontal ledge that is 1.12 m high, and lands
1.48 m from the base of the ledge.
How much time was he in the air?
(Unit = s)
Which of the following is not true about arid deserts?
a.
They can be found in North America.
b.
The rain falls mostly as snow during the winter.
c.
They are very hot and dry.
d.
The rain often evaporates before it hits the ground.
Please select the best answer from the choices provided
A
B
C
D
Answer: B | The rain falls mostly as snow during the winter.
Calculate the amount of kinetic energy a 50 kg runner has when he is going 2 m/s.
Equation: KE = 1/2mv2
Given:
Mass of the runner (m) = 50 kg
Speed of the runner (v) = 2 m/s
Equation:
[tex] \rm KE = \dfrac{1}{2} mv^2[/tex]
Answer:
By substituting values in the equation, we get:
[tex] \rm KE = \dfrac{1}{2} \times 50 \times 2^2 \\ \\ \rm = \dfrac{1}{2} \times 50 \times 4 \\ \\ \rm = 25 \times 4 \\ \\ \rm = 100 \: J[/tex]
[tex] \therefore [/tex] Kinetic energy of the runner = 100 J
Answer:
Given,
mass(m)=50kg
velocity(v)=2m/s
kinetic energy(K.E.)=?
We know that K.E.=1/2mv2
KE=1/2×50×2^2
Explanation:
=1/2×200
=100 Joule
why are magnetic materials attracted to magnets
Hello!
Topic: Magnetic material
Why are magnetic materials attracted to magnets?
Because when you expose any magnetic material to a magnetic field, magnetc material atoms start to align their electrons, because they flow by magnetic fields.
Then the atoms reacts to the field, and try to get together to the magnetic electrons field.
Thats why magnetic materials are attracted to magnets.
SONAR is an example of which type of wave behavior? Explain how it works and be sure to name the type of wave involved
Answer:
sound waves
Explanation:
SONAR (originally an acronym for Sound Navigation And Ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, communicate with or detect objects on or under the surface of the water, such as other vessels.
In this method, to find the depth of an ocean, a strong ultrasonic wave is sent from the ship towards the bottom of the ocean. This ultrasonic wave is received back after it is reflected from the bottom of the sea. The time interval t for travel of sound waves from the source to the receiver after reflection is noted.The distance travelled by the ultrasound ray is given by the equation: 2d=vt, where v is the velocity of sound. From this the depth d can be calculated.
Answer:
Sonar uses sound waves to 'see' in the water.
Sonar, short for Sound Navigation and Ranging, is helpful for exploring and mapping the ocean because sound waves travel farther in the water than do radar and light waves.Sonar (sound navigation ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, communicate with or detect objects on or under the surface of the water, such as other vessels.[2] Two types of technology share the name "sonar": passive sonar is essentially listening for the sound made by vessels; active sonar is emitting pulses of sounds and listening for echoes. Sonar may be used as a means of acoustic location and of measurement of the echo characteristics of "targets" in the water. Acoustic location in air was used before the introduction of radar. Sonar may also be used for robot navigation,[3] and SODAR (an upward-looking in-air sonar) is used for atmospheric investigations. The term sonar is also used for the equipment used to generate and receive the sound. The acoustic frequencies used in sonar systems vary from very low (infrasonic) to extremely high (ultrasonic). The study of underwater sound is known as underwater acoustics or hydroacoustics.
A toy car with an initial velocity of 5 m/s slows to a stop with an acceleration of -1.5 m/s^2.
What is your car's initial velocity?
What is the car's final velocity?
What is the acceleration of the car?
Write the equation you will use to solve this problem.
What is the displacement of the toy car?
4.8 m
8.3 m
16.7 m
21.4 m
Car's Initial velocity (u) = 5 m/s
Car's Final velocity (v) = 0 m/s (Stop)
Acceleration of the car (a) = -1.5 m/s²
Equation used to solve this problem:
[tex] \boxed{ \bf{ {v}^{2} = {u}^{2} + 2as}}[/tex]
By substituting values in the equation, we get:
[tex] \rm \longrightarrow {0}^{2} = {5}^{2} +2 \times ( - 1.5) \times s \\ \\ \rm \longrightarrow 0 = 25 - 3s \\ \\ \rm \longrightarrow 25 - 3s = 0 \\ \\ \rm \longrightarrow 25 - 25 - 3s =0 - 25 \\ \\ \rm \longrightarrow - 3s = - 25 \\ \\ \rm \longrightarrow 3s = 25 \\ \\ \rm \longrightarrow \dfrac{3s}{3} = \dfrac{25}{3} \\ \\ \rm \longrightarrow s = 8.3 \: m[/tex]
[tex] \therefore [/tex] Displacement of the toy car (s) = 8.3 m
The structure of the NaCl crystal forms reflecting planes 0.541 nm apart. What is the smallest angle, measured from these planes, at which constructive interference of an X-ray beam reflecting off the two planes is observed?
Answer:
[tex]\theta=4.5^{\circ}[/tex]
Explanation:
Given that,
The distance between reflecting planes is 0.541 nm, d = 0.541 nm
Let the wavelength is 0.085 nm
We need to find the smallest angle, measured from these planes, at which constructive interference. Using Bragg's equation to find it as follows :
[tex]m\lambda=2d\sin\theta[/tex]
For smallest angle, m = 1
[tex]\theta=\sin^{-1}(\dfrac{m\lambda}{2d})\\\\\theta=\sin^{-1}(\dfrac{1\times 0.085\ nm }{2\times 0.541\ nm })\\\\\theta=4.5^{\circ}[/tex]
So, the smallest angle is 4.5 degrees.
You are trying to tune the fifth string on your guitar, which is supposed to sound the A2 note (i.e., a note two octaves below A4). If the part of your guitar string in between where it is held down is 1.2 m and it has a mass of 0.006 kg, how much tension should you put the string under to get the right tuning?
Answer:
The value is [tex]T = 288 \ N[/tex]
Explanation:
From the question we are told that
The length of the guitar string considered is [tex]L = 1.2 \ m[/tex]
The mass is [tex]m = 0.006 \ kg[/tex]
Generally the tension is mathematically represented as
[tex]T = 4f ^2 m* L[/tex]
Here f is the frequency of the [tex]A_2[/tex] note which is [tex]f= 110 \ Hz[/tex]
So
[tex]T = 4* 110 ^2 * 0.006* 1.2[/tex]
=> [tex]T = 288 \ N[/tex]
5. A baseball player bats a ball with a force of 1,000 N. The ball exerts a reaction force against the bat
of...
a. Less than 1,000 N
b. More than 1,000 N
c. 1,000 N
Why???
Explaining the concept:
Reaction force is the equal and opposite force applied by an object after we apply some force to it
This is explained in the Newton's Third Law of Motion, which says: "For every action, there is an equal and opposite reaction"
This means that any force we apply on an object, it applies the same force on us
Reaction Force exerted by the ball:
We now know what a reaction force is. Now looking at the scenario, we can see that the player applied a force of 1000N on the ball using his bat
The ball will also apply an equal and opposite force on the Bat,
So, the ball will apply a force of 1000N on the Bat
Therefore, Option C is correct
What is acceleration
[tex]{\tt{\red{\underline{\underline{\huge{Answer:}}}}}}[/tex]
[tex]\longrightarrow[/tex] The rate of change of velocity per unit time is called acceleration.
[tex]\longrightarrow[/tex] Its SI unit is m/s².
[tex]\huge\boxed{\fcolorbox{blue}{red}{Thank you}} [/tex]
What experimental evidence led to the development of the atomic model before the one before it?
two boats are anchored in the harbor, separated by a horizontal distance of 12m. the boat bob up and down as waves enter
The deep interior of the Earth cannot be mapped using seismic waves . true or false ?
Answer: The answer is false.
it is dangerous to stand near the railway leak when train passing by,why?
It is dangerous to stand close to railroad tracks when a rapidly moving commuter train passes. Explain why atmospheric pressure would push you toward the moving train. Water pressure inside a hose nozzle can be less than atmospheric pressure due to the Bernoulli effect.
Pls brainliest!? :)
According to the law of conservation of energy, which statement must be
true?
A. Energy that is transferred cannot be transformed into a different
type of energy.
O B. The total energy of a system can increase only if energy enters the
system.
C. The total energy in a system can only decrease over time.
O D. A system cannot take in additional matter.
SIR
Answer: B
Explanation:
Why might a material transmt some waves, while absorbing or reflecting other waves
Answer:
Because the different waves will feel like to bounce off to different directions, and different items will do different actions.
Which refers to the area on the thermometer marked with the letter A? scale bulb mercury strip number line
Answer:
The answer is numberline, D
Explanation:
I got it right on edge
Answer:
A
Explanation:
Scale
Got it right on Edge:)
On land, the most massive concrete block you can carry is 25 kg. Given concrete’s 2200‐ kg/m3 density, how massive a block could you carry underwater
Answer:
46kg approx.Explanation:
Given data
Density of concrete ρ_c=2200kg/m3
Mass of concrete m_c= 25kg
In water
[tex]F_{P2} + F_{app}-m_{cg}=0[/tex]
[tex]F_{app}=m_{cg}-F_{P2}[/tex]
Max Fapp = 25*g
Buoyancy force
[tex]F_{P2} = \rho WgV_c= \rho Wg\frac{\rho_c}{m_c}\\\\F_{ p2}= \rho Wg\frac{\rho_c}{m_c}[/tex]
[tex]25*g=m_cg- \rho W g\frac{mW}{\rho_c}= m_cg(1- \frac{\rho W}{\rho_c} )[/tex]
[tex]m_c=25( \frac{\rho_c}{\rho_c- \rho W} )[/tex]
substitute
[tex]m_c=25( \frac{2200}{2200- 1000} )\\\\m_c=25*1.833\\\\m_c=45.8[/tex]
=46kg approx.
The diagram shows the top view of a 65-kg student at point A on an amusement park ride. The ride spins the student in a horizontal circle with a radius of 2.5 m, at a constant speed of 8.6 m/s. The floor is lowered and the student remains against the wall without falling to the floor.
The magnitude of the centripetal force acting on the student at point A is approximately
Question 4 options:
1398 N
47 N
223 N
1923 N
Answer:
1923 N
Explanation:
From the question given above, the following data were obtained:
Mass (m) = 65 Kg
Radius (r) = 2.5 m
Velocity (v) = 8.6 m/s
Centripetal force (F) =?
The centripetal force, F, can be obtained by using the following formula:
F = mv²/r
F = 65 × 8.6² / 2.5
F = 65 × 73.96 / 2.5
F = 4807.4 / 2.5
F = 1922.96 ≈ 1923 N
Thus, the magnitude of the centripetal's force acting on the student is approximately 1923 N
HELP!!!!!!!!!!!
The earliest multi celled organisms on Earth were:
a
Bacteria
b
Vertebrates
c
Invertebrates
d
Plants
Answer:
Bacteria
Explanation:
Answer:
The answer is bacteria.
Explanation:
Bacteria were the first known multi-celled organism on Earth.
5. bending the electric wire a.change in size
b.change in shape
c.change in texture
Answer:
change in shape
hope this will help you
The objective lens and the eyepiece of a telescope are spaced 85 cm apart. If the eyepiece is123 D what is the total magnification of the telescope?
Answer:
The magnification would be "103.55". A further explanation is given below.
Explanation:
The given values are:
Distance between lens and eyepiece,
L = 85 cm
Eyepiece is,
= 123 D
Now,
The refractive power of eye piece will be:
⇒ [tex]\frac{1}{f_e}=123D[/tex]
[tex]f_e=\frac{1}{123D}[/tex]
[tex]f_e=0.813 \ cm[/tex]
The length of the telescope will be:
⇒ [tex]L=f_0+f_e[/tex]
⇒ [tex]f_0=L-f_e[/tex]
On substituting the values, we get
⇒ [tex]=85-0.813[/tex]
⇒ [tex]=84.187 \ cm[/tex]
Now,
The magnification of the telescope will be:
⇒ [tex]M=\frac{f_0}{f_e}[/tex]
⇒ [tex]=\frac{84.187}{0.813}[/tex]
⇒ [tex]=103.55[/tex]
The speed of light can be measured by;
A. Time of planets rotation
B. Distance between objects in space
C. Mass of astronomical bodies
Answer:
it's the distance between objects in space
Explanation: Light travels super fast; but it still takes a long time to travel between objects in space. This is because distances between objects in space are enormous.
And can i please receive a brainliest and have a good day
A ball is still live when
1. A hand off has been dropped
2. The quarterback does not catch the snap
3. Both A and B
PLZZ ANSWER THE QUESTION
What is an inexpensive, portable, and common way to assess body fat in the fitness industry?
DEXA
Bioelectrical impedance
Skinfold testing
Hydrostatic weighing
Answer: Skinfold testing
Explanation:
Skinfold testing, is also referred to as calliper testing and it's used to know the body fat percentage. Skinfold testing is an inexpensive, portable, and common way to assess body fat in the fitness industry.
It is typically done with the use of caliper tapes, marker pens which makes it cheap. Skinfold testing isn't usually accurate which is as a result of human errors.
Describe the three times acceleration can happen
Answer:
There are three ways an object can accelerate: a change in velocity, a change in direction, or a change in both velocity and direction.
Explanation:
There are three ways an object can accelerate by a change in velocity, a change in direction, or a change in both velocity and direction.
What is acceleration?Acceleration is given by the ratio of Resultant or total force acting on any object and the its mass.
It can also be defined as the rate change of velocity with time.
acceleration a = (Δv) / (Δt)
The change in velocity will change the acceleration. As, the acceleration is vector quantity, its direction change will also change the acceleration.
And both the change in velocity and direction will have effect on acceleration.
Learn more about acceleration.
https://brainly.com/question/12550364
#SPJ2