help this is for my civics class

(a) The velocity of the apple with respect to the road is 100 km/h.

(b) The velocity of the apple with respect to you is 0 km/h.

(c) If you drop the apple the horizontal velocity will not change due to law of conservation of linear momentum.

The relative velocity of the apple placed over your with respect to the road is calculated as follows;

Velocity of the apple = 100 km/h

Velocity of the road = 0 km/h

Va/r = 100 km/h - 0 km/h

Va/r = 100 km/h

The velocity of the apple relative to you is calculated as follows;

your velocity = 100 km/h

velocity of the apple = 100 km/h

Va/y = 100 km/h - 100 km/h

va/y = 0 km/h

If you drop the apple, the horizontal velocity will remain the same, because gravity does not affect horizontal motion.

The law is law of conservation of linear momentum.

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Answer:

53.95g

Explanation:

Given parameters:

Number of moles = 0.48mol

Unknown:

Mass of cadmium = ?

Solution:

The number of moles, molar mass and mass of the atom is related by the expression;

        Mass of Cd  = number of moles x molar mass

Molar mass of Cd  = 112.4g/mol

 Now;

        Mass of Cd  = 0.48 x 112.4 = 53.95g

Answer:

Exerxingtransforms the chemical energy in the food you eat into Kinetic Energy.

Therefore, the answer is A. Kinetic Energy

Answer:

D.) A 15 kg mass moving at 2.0 m/s

Explanation:

The inertia of an object is most directly related to its mass and not the magnitude of the velocity.

So, the higher the mass of an object, the more its inertia.

According to Newton's first law of motion "an object will remain in its state of rest or of constant motion unless it is acted upon by an external force".

The voltage drop across the 20 Ohm resistor is 40V.

To determine the answer, we need to know about the current flowing through the resistor.

As the three resistors are connected in series, so the resultant resistance is

   10 Ohmv+ 20 Ohm + 30 Ohm = 60 Ohm

                           Current= 120/60 = 2 A

According to Ohm's law, voltage across the 20 Ohm resistor

                      = current×resistance

                      = 2×20

                      = 40volt

Thus, we can conclude that the voltage across the 20 Ohm resistor is 40V.

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Answer:60 W

Explanation:

Answer:Control S, Command S on MAC=Save

Answer:

The speed of the car is in from as the required speed limit on the road.

Explanation:

The speed limit on the road is 30 miles per hour.

Given that: 1 mile = 1609 m

Also,

60 second = 1 minutes

60 minutes = 1 hour

Then,

30 miles per  hour = [tex]\frac{30 *1609}{60*60}[/tex]

                              = [tex]\frac{48270}{3600}[/tex]

                              = 13.4083

30 miles per  hour  = 13.41 m/s

The speed measured by the detector is 15 m/s which is not accurate. Therefore, the car was moving at the required speed limit. The speed of the car is lesser than that measured by the detector. Thus no offence has been committed by the driver.

Answer: volume of an object???

Explanation:

Answer:

The resistance of an ammeter should be low. This is because an ammeter is connected in series with the circuit for the measurement of electric current. In case, its resistance is high, then some amount of current may lost in heating it leading to the inaccurate reading. An ideal ammeter is one which has zero resistance.

Answer:

I believe the answer is roughly 49m/s

Explanation:

List all given variables:

Accel=20m/s^2

Dist=100m

Final velocity=80m/s

Initial velocity=?

Using the equation i=sqrt(f^2-2a*d) where i =initial velocity, f=final velocity, a=acceleration, and d=distance, we can plug in the known values and solve for initial velocity

i=sqrt(80^2-2*20*100)

i=sqrt(6400-4000)

i=sqrt(2400)

i=48.99, rounded up to 49m/s as the initial velocity

This is my speculation about this answer would appreciate if anyone can confirm this.

Answer:

However, if you add a thousand neutrons, you will be creating one super-radioactive atom. Neutrons play a major role in the mass and radioactive properties of atoms. You may have read the page on isotopes. Isotopes are created when you change the normal number of neutrons in an atom.

Explanation:

The neutron is a subatomic particle, symbol n or n⁰, which has a neutral (not positive or negative) charge and a mass slightly greater than that of a proton. Protons and neutrons constitute the nuclei of atoms. Since protons and neutrons behave similarly within the nucleus, and each has a mass of approximately one atomic mass unit, they are both referred to as nucleons. Their properties and interactions are described by nuclear physics.

Answer:

Yes

Explanation:

It is possible that the existence of two different angle of incidence of a single angle of deviation.

This is possible according to the principle of the reversibility of light which explains its formed in a prism.

When a ray is incident on the first surface it then emerges out of the second surface and could allow another ray to be incident on second.

Answer:

Explanation:

When one wave crest overlaps with  the crest of another and they add together and their amplitude increases. Hence, C is correct.

Amplitude of a wave is the distance from the midpoint of a crest to its top or the distance from the midpoint of a trough to its bottom. For a wave the peak to the top is called crest and peak to the bottom or decline is called troughs.

When two waves overlap by crest of one wave and trough of another wave, then their amplitude will decrease and it is called destructive interference.

Amplitude of a wave is directly related to its intensity. High amplitude waves are intense. When two waves overlaps by their crests and add up together their amplitude will be the sum of amplitudes of both waves. This is called constructive interference. Hence, option C is correct.

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Answer:

4 m/s^2

that is the right acceleretion a car

Answer:

I believe that the answer is 3 m/s^2

Explanation:

since acceleration is final velocity minus initial velocity divided by time, we can plug in known values and solve.

a=(f-i)/t

a=(16-4)/4

a=12/4

a=3

3m/s^2 is the acceleration

Answer:

c is correct option thanks to brainly

Explanation:

The problem here deals with relative dating of fossils in a stratigraphic column.

To solve this problem, we apply one of the rules of interpreting a session which is the principle of fossil and fauna succession:

    "fossils and fauna in a geologic sequence succeed one another in a predictable way".

  The oldest fossil is found in the oldest bed usually at the bottom of the sequence.

The youngest fossil is found at the top of the beds.

1. Oldest organism in the sequence;

  Trilobite

2. Organism in the youngest layer;

   Fern

3. Older organism between Crinoid and Ammonite;

       Ammonite

The ammonite is below the crinoid in the sequence.

Answer:

Explanation:

The speed of the ball can be found by using the formula

[tex]s= \frac{p}{m} \\ [/tex]

p is the momentum

m is the mass

From the question we have

[tex]v = \frac{40}{10} = 4 \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

A. im not for sure hope it helps

Explanation:

Answer:

b  The force is perpendicular to the displacement of the object.

Explanation:

Work is done when a force is applied on a body causing it to move in a particular direction.

  Work done  = Force x displacement

For work to be done, a force must applied on a body to move it through a specific distance in direction.

When force is perpendicular to the displacement of the object, the component vector resolution is 0 and the work done is 0.

Solids can be classified into two types: crystalline and amorphous. Crystalline solids are the most common type of solid. They are characterized by a regular crystalline organization of atoms that confer a long-range order. Amorphous, or non-crystalline, solids lack this long-range order.

Answer:v=l x w x h

Explanation:

h=height

w=width

l=length

Answer:

24.108 cm3

Explanation:

4.1x2.8x2.1

24.108cm3

The pair of concurrent  forces will be of 5 N to make the magnitude of net force as 10 N.

Given data:

The magnitude of resultant force is, [tex]F_{net}=10 \;\rm N[/tex].

The given problem is based on the concept of concurrent forces which says that, If the forces applied to a body are such that their lines of action meet at a single point, then they are called concurrent forces.

Now to obtain the value of concurrent forces, let us consider the forces F and F' to be acting along a linear direction. Such that the net force is given as,

[tex]F_{net}=F+F'[/tex]

Then for 10 N of net force, the pair of concurrent force is,

[tex]10=F+F'\\\\10=5+5\\\\10=10[/tex]

Thus, we conclude that the pair of concurrent forces will be of 5 N to make the magnitude of net force as 10 N.

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Answer:

i believe it's 7

Explanation:

Answer:

The value is  [tex]h = 13.2 \ m[/tex]

Explanation:

From the question we are told that

    The speed of the rope with hook is [tex]u = 24 .1 \ m/s[/tex]

     The angle is  [tex]\theta = 65.0^o[/tex]

      The speed at which it hits top of the wall is  [tex]v = 16.3 m/s[/tex]

Generally from kinematic equation we have that

      [tex]v_y^2 = u_y ^2 + * 2 (-g)* h[/tex]

Here h is the height of the wall so

      [tex][16.3 sin (65)]^2 = [24.1 sin (65)] ^2+ 2 (-9.8)* h[/tex]

=>    [tex]h = 13.2 \ m[/tex]

Answer:

68.2 Quadrillion meters

Explanation:

A lightyear is the distance that light travels in one year.

Speed of light is [tex]3*10^8\ m/s[/tex]

So light covers 300,000,000 meters in one second.

One year has 31536000 seconds so , light covers

[tex]9.461*10^{15}\ meters\ in\ one\ year[/tex]

so 7.2 light years is

[tex]7.2*(9.461*10^{15})\\6.82*10^{16}[/tex]

so 7.2 light years is

6.82 x 10^(16) meters or

68.2 Quadrillion meters