the angle between incident ray and reflected ray is 130.what is the value of angle of incidence​

Answer:

[tex]sln \\ given \\ velocity \:(v) = 45ms {}^{ - } \\ mass \: of \: car \: (m) = 1120kg \\ kinetic \: enegy(k.e) = x \\ \\ k.e = \frac{1}{2} MV {}^{2} \\ k.e = \frac{1}{2} \times 1120 \times 45 \\ k.e = 25200j[/tex]

the car has kenotic energy is 2500J

The car will , have the kinetic energy of 1134 kJ. The kinetic energy is found as the product of half of mass and the square of  velocity.

The energy of the body by the virtue of its motion is known as the kinetic energy of the body. It is defined as the product of half of mass and square of the velocity.

The given data in the problem is;

A car traveling with a velocity,v= 45 m/s

The mass is, m= 1120 kg.

The kinetic energy is found as;

[tex]\rm KE = \frac{1}{2} mv^2 \\\\\ \rm KE = \frac{1}{2} 1120 (45)^2 \\\\\ \rm KE = 1134 \ kJ[/tex]

Hence, the car will , have the kinetic energy of 1134 kJ.

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Answer:

The cell theory

Explanation:

The explanation of the relationship between the building blocks of life based on the evidence gathered by scientists from studying these building blocks is called the cell theory.

Many scientists study the building blocks. One of the earliest scientists to study these blocks gave them the name 'cells'. Thereafter, several other scientists studied different aspects of the cell and, eventually, the cell theory was propounded. There are three aspects to the theory:

Answer:

True

Explanation:

the horse pull on the wagon but friction and the wight + gravity make the wagon pull on the horse ( newton's 2ed law)

Answer:

10j

Explanation:

2x5=10

Violet pulls a rake horizontally on a frictionless driveway with a net force of 2.0 N for 5.0 m.

How much kinetic energy does the rake gain?

Answer: 10 J

Answer/Explanation: As mentioned above, the characteristic chemical property of a metal atom is to lose one or more of its electrons to form a positive ion. However, certain metals lose electrons much more readily than others. In particular, cesium (Cs) can give up its valence electron more easily than can lithium (Li).

-Bababooeyboy

Answer:

0.49 s

Explanation:

i'm in middle school sorry if i'm wrong.

The time taken for the iPod to fall from the top table is 0.5 s.

The given parameters;

The time taken for the iPod to fall from the top table is calculated as follows;

[tex]h = v_0t + \frac{1}{2} gt^2\\\\h = 0 + \frac{1}{2} gt^2\\\\h = \frac{1}{2} gt^2\\\\gt^2 = 2h\\\\t^2 = \frac{2h}{g} \\\\t = \sqrt{ \frac{2h}{g} } \\\\t = \sqrt{ \frac{2\times 1.2 }{9.8} }\\\\t = 0.5 \ s[/tex]

Thus, the time taken for the iPod to fall from the top table is 0.5 s.

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Answer:

1. The bird close to the center

2. 4/25 of the original force.

Explanation:

1. Tangential velocity is v=w*d (in m/s), where w is the rotational speed, commonly denoted as the letter omega (in radians per second). d is the distance from the center of the rotating object to the position of where you would like to calculate the velocity (in meters).

As we can note, the furthest from the center we are calculating the velovity the higher it is, because the rotational velocity is not changing but the distance of the object with respect to the center is. If v=w*d, then the lower the d (distance) the lower the tangential velocity.

2. Take a look at the picture:

We have the basic equation for the gravitational force.

We have to forces: Fg1, which is the original force, and Fg2, the force when the mass and the distance changes.

If we consider that mass 2 didn't change (m2'=m2), mass 1 is four times its original (m1'=4*m1) and distance is 5 times the original (r'=5*r), then next step is just plugging it into the equation for Fg2.

Dividing the original force Fg1 by the new force Fg2 (notice you can just as well do the inverse, Fg2 divided by Fg1) gives us the relation between the forces, cancelling all the variables and being left only with a simple fraction!

Answer: its b because  as soon as you go far away from light it get red and dents

Explanation:

Answer:

6.342 m/s. 2).

Explanation:

Answer:

-1

Explanation:

An atom contains a proton, electron and neutron as subatomic particles. The number of protons, which is the positively charged particle (+) is always equal to the number of electrons, which is the negatively charged particle (-) in A NEUTRALLY CHARGED ATOM i.e. no charge.

However, a decrease or increase in charge is dependent on the number of electrons and protons in that atom. Sulfur atom has an electron number of 16 in its neutral atom, however, when it gains one more electron to become 17, it means that the charge has become -1 because the charge = number of protons - number of electrons i.e. 16 - 17 = -1.

Answer:

OA. . review all safety procedures and the lab activity procedure

Explanation:

Answer:

Amorphous solids are composed of atoms or molecules that are in no particular order. Each particle is in a particular spot, but the particles are in no organized pattern. Examples include rubber and wax. Crystalline solids have a very orderly, three-dimensional arrangement of atoms or molecules

Explanation:

Answer:

ch 46umm nym m m m   m hj hj hj

Explanation:

Answer:

Heating.

Cooling.

Water Heater.

Lights.

Explanation:

Answer:

thaYeah, I kinda dont have an answer for you either... sorry -__-

Explanation:

Answer:

0.08 sin 3nt +

metre. Then calculate-

a time period

(d) Time period

(

Minitial phase

wõisplacement

7

(c) Displacement from mean position at t=

36

sec.

Explanation:

thats the answer

Answer:

The height or the mass

Explanation:

The one variable that can change the potential energy of a box on the floor is either the height or the mass of the box.

Potential energy is the energy due to the position of a body.

Mathematically;

  Potential energy  = mass x acceleration due to gravity x height

Therefore, if the mass of the box is changed, the potential energy changes also.

If the position of the box is changed by raising it up, the potential energy changes

Answer:

false

Explanation:

the answer is false bc for a non-polar bond to form the electrons are shared equally...

Answer:

However, it is important to remember that acceleration is change in velocity. So, even if an object is moving at a constant speed, if it changes direction, the object is accelerating. Most people think of acceleration as an increase in speed. However, slowing down is also considered acceleration.

Explanation:

Answer:

Let's briefly summarize the major features of resistors in series:

Series resistances add together to get the equivalent resistance (Equation 10.3. 2): RS=R1+R2+R3+... ...

The same current flows through each resistor in series.

Individual resistors in series do not get the total source voltage, but divide it.

Answer:

1.57 V

Explanation:

The induced emf ε = -ΔΦ/Δt where Φ = magnetic flux = NABcosθ where N = number of turns of circular coil = 20, A = area of coil = πr² where r = radius of coil = 10.0 cm = 0.1 m , B = strength  of magnetic field = 0.30 T,θ = angle between normal to are and magnetic field and Δt = change in time = 0.12 s

Now ΔΦ = change in magnetic flux through circular coil = Φ' - Φ

Φ = magnetic field when A is perpendicular to B , that is θ = 90°. So, Φ = NABcos90 = 0 and Φ' = magnetic field when A is parallel to B , that is θ = 0°. So, Φ' = NABcos0 = NAB

So, ΔФ = Ф' - Ф

= 0 - NAB

= -NAB

= -Nπr²B

= -20 × π(0.1 m)² × 0.30 T

= -0.19 Wb

So, ε = -ΔΦ/Δt

= -(-0.19 Wb)/0.12 s

= 1.57 Wb/s

= 1.57 V

The induced EMF in the coil is 1.57 V

The induced EMF is produced due to the changing magnetic flux through a coil. Mathematically EMF is the rate of change of flux.

E = -ΔФ/Δt

where ΔФ is the change in the magnetic flux, and

Δt is the time period

Initial magnetic flux through the coil is:

Ф = NABcosθ ,

N = 20, number of turns

A = area of the coil = πr² = 3.14 × (0.1)² = 0.0314 m²

B = 0.30 T, magnetic field

here θ = 90°

so , Ф = 0

Final magnetic flux through the coil is:

Ф' = NABcosθ, here θ = 0°, so

Ф' = 20 × 0.0314 × 0.30 × 1

Ф' = 0.1884 Wb

ΔФ = Ф - Ф'

ΔФ = -0.1884 Wb

given that Δt = 0.12s

E = -ΔФ/Δt

E = 0.1884 / 0.12

E = 1.57 V

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Answer:

in the opposite direction of the force

Answer:

The force applied moves the object in the direction of the force. Suppose if the force is applied to the moving object in that case object moves in the direction of the stronger force. Thus, according to the given question the applied force moves the object in its direction.

that means it's the 2nd option( in the opposite direction of the force

Answer:

B. 15 m/s

Explanation:

p = m × v

480 = 32 × v

32v = 480

v = 480/32

v = 15 m/s

Answer:

B. 15 m/s

Explanation:

P=MV

480=32×v

v=15m/s

Answer:

The kinetic energy of a 90 kg mass that is moving with a velocity of 6 m/s is 1620 J.

Explanation:

Given

To determine

The kinetic energy (K.E) of a body of mass of a 90 kg mass that is moving with a velocity of 6 m/s can be calculated using the formula

[tex]K.E=\frac{1}{2}mv^2[/tex]

where

substituting m = 90 and v = 6 in the formula

[tex]K.E=\frac{1}{2}mv^2[/tex]

[tex]K.E=\frac{1}{2}\left(90\right)\left(6\right)^2[/tex]

       [tex]=\frac{1}{2}\left(90\right)\cdot \:36[/tex]

       [tex]=1620[/tex] J

Therefore, the kinetic energy of a 90 kg mass that is moving with a velocity of 6 m/s is 1620 J.

Answer:

d

Explanation:

Answer:

Gravity as well as electrostatic and magnetic attraction and repulsion provide real life examples of forces being exerted by one object on another without them being in contact with each other. Many children are aware of magnetism and have played with fridge magnets.

Explanation:

Boyle's law can be stated as the "volume of a fixed mass of a gas varies inversely as the pressure changes if the temperature is constant". It is mathematically expressed as;

    P1 V1  = P2 V2

P1 is the initial pressure

V1 is the initial volume

P2 is the final pressure

V2 is the final volume

Charles's law states that the volume of a fixed mass of a gas varies directly as its absolute temperature if the pressure is constant.

It is mathematically expressed as;

            [tex]\frac{V1}{T1}[/tex]    = [tex]\frac{V2}{T2}[/tex]  

V and T are volume and temperature respectively

1 and 2 are the initial and final states