Answer:
When a ray of light approaches a smooth polished surface and the light ray bounces back, it is called the reflection of light.
Answer:
The process of returning of a beam of light to the same medium after striking on a surface is called reflection of light .
hope it is helpful to you
which quantity is the vector?
a) weight
b) power
c) kinetiic energy
d) speed
A car is moving eastward and speeding up. The momentum of the car is ______.
a. increasing
b. decreasing
c. remaining constant
Give three other examples for each state of matter.
d movement of particles for each state
solid
1.coin
2.iron bar
3.glass(no, it's does not flow)
liquid
1.water
2.wine
3.mercury(a liquid metal).
Gas
1.carbon dioxide
2.nitrogen
2.oxygen
I hope this answer helps me
a 4 kg vase sits on a shelf at a height of 1.2m .how much gravitational potential energy is added to the vase when it is lifted to a shelf of height 1.4m .
Answer:
54.88 J
Explanation:
PE = mgh
PE = (4)(9.8)(1.4)
= 54.88 J
A 51-g rubber ball is released from rest and falls vertically onto a steel plate. The ball strikes the plate and is in contact with it for 0.5 ms.
The ball rebounds elastically and returns to its original height. The time interval for the round trip is 3.00 s. What is the magnitude of the
average force that the plate exerted on the ball?
2490 N
1500 N
2000 N
3500 N
3000 N
Answer:
F = 3000 N
Explanation:
Let's use the relationship between momentum and momentum
I = Δp
F t = m v_f - m v₀
As the body when bouncing reaches the same height from which it begins to fall, the modulus of speed is the same, but in the opposite direction,
v_f = - v₀ = v
F t = m 2v
F = 2 m v / t (1)
This is the contact time t = 0.5 ms = 0.5 10⁻³ s
Let's use the kinematics to find the velocity at the point of touching the plate, as the total travel time is 3.0 s, the descent time must be half the total time
t = 1.5 s
as the body solved its initial velocity is zero
v = v₀ + g t
v = g t
v = 9.8 1.5
v = 14.7 m / s
we substitute in equation 1
F = 2 0.051 14.7 / 0.5 10-3
F = 2,999 103 N
F = 3000 N
The average force that the plate exerted on the ball is 3,000 N.
The given parameters;
mass of the rubber ball, m = 51 g = 0.051 kgtime in contact, t = 0.5 mstime interval for rebound, Δt = 3 sThe velocity of the ball is calculated as follows;
[tex]v = g\Delta t\\\\v = 9.8 \times 3\\\\v = 29.4 \ m/s[/tex]
The average force that the plate exerted on the ball is calculated as follows;
[tex]F = \frac{mv}{t} \\\\F = \frac{0.051 \times 29.4}{0.5 \times 10^{-3} } \\\\F = 3,000 \ N[/tex]
Thus, the average force that the plate exerted on the ball is 3,000 N.
Learn more here:https://brainly.com/question/20820227
The base for hair follicles is in the _____.
epidermis
fatty layer
dermis
dentin
Answer:
dermis
Explanation:
epidermis
dermis
hypodermis
When animals such as fox, deer and bears eat fruits from plants, the seeds are typically completely digested. True False
Answer:
False.
Explanation:
The plants rely on animals to spread their seeds, thats why they make fruits so the animals eat em, the seeds are strong enough to survive the animals stomach and come out the other end.
Which is the strongest of the four fundamental forces? strong nuclear, weak nuclear, electromagnetic, gravitational
Answer:
Hands down, the strong nuclear force.
Answer:
strong nuclear force, hope it helps!
Explanation:
Actually, gravity is the weakest of the four fundamental forces. Ordered from strongest to weakest, the forces are 1) the strong nuclear force, 2) the electromagnetic force, 3) the weak nuclear force, and 4) gravity.
source: https://wtamu.edu/~cbaird/sq/2013/05/22/why-is-gravity-the-strongest-force/
A car begins at rest (0 velocity), 5 seconds later it is travelling at 20 meters/per second. What was the acceleration of the vehicle during these 5 seconds
Please help ASAP
use the formula
v= u+ at
v is final velocity , u is initial velocity , a is acceleration and t is time
put the values
20 = 0+ a×5
a = 4 m/s²
Answer:
Initial velocity(u)=0
Final velocity(v) =20 meters/ second
Time(t)=5
Acceleration (a)=?
a=v-u/t
a=20-0/5
a=20/5
a=4meters/second
how large a band of frequencies does each television broadcasting channel get ?
Answer:
Since the waves must carry a great deal of visual as well as audio information, each channel requires a larger range of frequencies than simple radio transmission. TV channels utilize frequencies in the range of 54 to 88 MHz and 174 to 222 MHz. (The entire FM radio band lies between channels 88 MHz and 174 MHz.)
Answer:
Since the waves must carry a great deal of visual as well as audio information, each channel requires a larger range of frequencies than simple radio transmission. TV channels utilize frequencies in the range of 54 to 88 MHz and 174 to 222 MHz. (The entire FM radio band lies between channels 88 MHz and 174 MHz.)
Explanation:
Ok
Some giant ocean waves have a wavelength of 25 m and a frequency of
0.26 Hz. What is the wavespeed of such a wave? *
Answer:
Explanation:
The frequency equation for waves is
[tex]f=\frac{v}{\lambda}[/tex] where f is the frequency, v is the velocity, and lambda is the wavelength. Filling in:
[tex].26=\frac{v}{25}[/tex] so
v = .26(25) and
v = 6.5 meters/second
Who was responsible for arriving at the
conclusion that measured amounts of
electrical and mechanical energy can be
converted to proportionate amounts of heat
energy?
Answer:
James Prescott Joule
James Prescott Joule, (born December 24, 1818, Salford, Lancashire [now in Greater Manchester], England—died October 11, 1889, Sale, Cheshire), English physicist who established that the various forms of energy—mechanical, electrical, and heat—are basically the same and can be changed one into another.James Prescott Joule experimented with engines, electricity and heat throughout his life. Joule's findings resulted in his development of the mechanical theory of heat and Joule's law, which quantitatively describes the rate at which heat energy is produced from electric energy by the resistance in a circuit.
Which of the following is a scientific question?
A. What is the best price for an LED screen design?
B. Which LED screen design produces the most attractive images?
C. Which LED screen design is the most energy efficient?
D. Does the LED screen design violate a previous patent?
Answer:
I think the answer would be c
Explanation:
A. is not scientific
B. is subjective, so it can't be scientific.
C. can be studied with an experiment
D. relates to regulations, not science
A ball moving with an initial velocity of 5 m/s comes to rest after 2s. What was the ball's acceleration?
Answer:
-2.5m/s²
Explanation:
The acceleration of a body is giving by the rate of change of the body's velocity. It is given by
a = Δv / t ----------------(i)
Where;
a = acceleration (measured in m/s²)
Δv = change in velocity = final velocity - initial velocity (measure in m/s)
t = time taken for the change (measured in seconds(s))
From the question;
i. initial velocity = 5m/s
final velocity = 0 [since the body (ball) comes to rest]
Δv = 0 - 5 = -5m/s
ii. time taken = t = 2s
Substitute these values into equation (i) as follows;
a = (-5m/s) / (2s)
a = -2.5m/s²
Therefore, the acceleration of the ball is -2.5m/s²
NB: The negative sign shows that the ball was actually decelerating.
Three balls with different masses are shown below.
(picture of beach ball) - 85g
(picture of football) 425g
(picture of baseball) - 149g
If the same amount of kicking force is applied to each ball, which will travel the farthest?
F - They will all travel the same distance because the applied force is the same
G - the baseball because it's the smallest
H - The football because it has the highest mass and was designed for kicking
J - the beach ball because it has the lowest mass
(btw it's a football, not soccer ball)
Answer:
$10 a g
Explanation:
Answer:
As The mass of the beach ball is having lowest magnitude when compared with the other balls given so when apply the same magnitude of force to all the balls then the beach ball due to its lighternessand also its inertia of rest would not resist the force so much so when you apply the force to this ball it would starts to roll and covers the maximum diatance whwn compared with the other ball only in the condition when same magnitude of force applied.Thats this ball would do more work than the other ball.The mass also influences the velocity carried by the body and also the kinetic energy possessed by the body. More the force applied more the distance it would cover
Hope it helps
6. A massive truck collides with a less massive car. The force experienced by the truck is ____________ (less than, equal to, greater than) the force experienced by the car. The resulting acceleration of the truck is ____________ (less than, equal to, greater than) the resulting acceleration of the car.
Please answer ASAP
A massive truck collides with a less massive car. The force experienced by the truck is equal to (less than, equal to, greater than) the force experienced by the car. The resulting acceleration of the truck is less than (less than, equal to, greater than) the resulting acceleration of the car.
In a launch speed formula vx = d over t, vx is acceleration, d is distance, and t is time.
Answer:
V of x is the velocity on the x graph so it is false
Hope it helps
Answer: False
Explanation:
Vx can't be acceleration because acceleration is velocity over time not distance over time (the equation for speed)
4. Why is the temperature constant during the boiling of water?
Answer:
When boiling occurs, the more energetic molecules change to a gas, spread out, and form bubbles. These rise to the surface and enter the atmosphere. It requires energy to change from a liquid to a gas. In addition, gas molecules leaving the liquid remove thermal energy from the liquid. Therefore the temperature of the liquid remains constant during boiling.
Circular Motion A 650-kg car moving at 8.5 m/s takes a turn around a circle with a radius of 48.0 m. Determine the acceleration acting upon the car. Use a = v2/ r
Answer:
Explanation:
The mass of the car doesn't matter because On a flat curve the mass of the car does not affect the speed at which it can stay on the curve. You would need the mass if you were solving the the centripetal force acting on the car, but not the acceleration.
[tex]a=\frac{v^2}{r}[/tex] and filling in
[tex]a=\frac{(8.5)^2}{48.0}[/tex] and we need 2 significant digits in our answer. That means that
a = 1.5 m/sec²
What is the voltage in an electric current?
a. The power of the electrons
b. The charge of the electrons
c. The energy of the electrons
A scholar climbs up 8 m of stairs while using 500 J of work in 10 seconds.
What is their power?
Answer:
according to the new geometry lesson alcometry which will after 11 years in geometry
A 1,650 kg SUV comes uniformly to a stop. If the vehicle is accelerating at -1.3 m/s^2,
which force is closest to the net force acting on the vehicle?
A. -9,600 N
B. -2,106 N
C. -1,250 N
D. -84 N
Answer:b
Explanation:
Can someone help me find the which direction is north and which is south on this solenoid?
Explanation:
Now, looking down the solenoid tube determine what direction is the winding. If clockwise in relation to the positive wire then is the south pole, if anti-clockwise then is the north pole. So, to summarize the magnetic south pole is always clockwise in relation to the positive wire.
what is the full name of the units used for frequency?
the unit of area is derived unit why
weathering can be either chemical or physical process that action of water causes physical weathering rocks which examples
Frost wedging is a type of physical weathering of rock.
Explanation:
Physical or mechanical weathering affects the rock structurally but does not change the chemical composition. Mechanical forces will rub, break or shatter the rock surfaces. Wedging, abrasion, exfoliation are different types of physical weathering.
Water is one of the main sources which alter the structure of the rocks physically.
Frost wedging occurring due to flow of freezing water over the rocks. This frozen water enters the rock through the cracks and crevices on the rock surface, and will expand inside and makes the rocks to crack further and breaks it apart.
Please mark brainliest
Look at the diagrams. Each model the arrangement of particles in a substance.
Which diagram is the best model for a solid?
Substance A
Substance B
Substance C
Answer:
a
Explanation:
because it has compact molecules
Of the following, which is a renewable energy resource?
a.
coal
c.
geothermal energy
b.
kerosene
d.
natural gas
Please select the best answer from the choices provided
A
B
C
D
coal or natural gas i think
Question:
A race car slows with an average acceleration of –8.0 m/s2 (negative sign shows deceleration). The car’s initial velocity is 100.0 m/s, how far does it travel in 12.0 seconds? Explain how you arrived at your answer?
Use the equations
Answer:
[tex]624\:\mathrm{m}[/tex]
Explanation:
We can use kinematics equation [tex]\Delta x =v_it+\frac{1}{2}at^2[/tex].
What we're given:
[tex]v_i[/tex] of 100.0 m/s[tex]t[/tex] of 12 s[tex]a[/tex] of -8.0 [tex]\mathrm{m/s^2}[/tex]Solving for [tex]\Delta x[/tex]:
[tex]\Delta x=100\cdot 12+\frac{1}{2}\cdot -8\cdot 12^2=\boxed{624\:\mathrm{m}}[/tex]
6.There are four mixtures A, B, C and D. The mixture A contains sand and sugar, mixture B contain chalk powder and salt, mixture C contains salt and sugar, whereas mixture D contains sugar and charcoal powder. Which one of these mixtures cannot be separated by using water as a solvent? Why?
Answer:
Mixture C (salt and sugar)
Explanation:
Both salt and sugar can dissolve in water. And you can't just separate the mixture by filtering it like you could in the other mixtures.