Just need the answer to D please

Answer:

Its A

Explanation:

Thats because federalists wanted to take away rights. But the fathers wanted to definitely ensure that each person had equal rights and liberty.

Answer:

in physics, resonance is a phenomenon in which a vibrating system or external force drives another system to oscillate with greater amplitude at specific frequencies. example a familiar example is a playground swing, which acts as a pendulum.

hope this helped!

Answer: The image formed by a plane mirror is always virtual (meaning that the light rays do not come from the image), upright and of the same shape and size as the object it is reflecting.

Answer: B. The angle when it leaves is the same as the angle when it hits

Explanation:

Apex

Answer:

λ = 3.33 m

Explanation:

Given:

Frequency = f = 9 × 10⁷ Hz

Speed = v = 3 × 10⁸ m/s

Required:

Wavelength = λ = ?

Formula:

v = fλ

Solution:

Putting the givens in the formula

v = fλ

λ = [tex]\frac{v}{f}[/tex]

λ = [tex]\frac{3*10^8}{9*10^7}[/tex]

λ = 0.33 × 10¹

λ = 3.33 m

Answer:

A student becomes negatively charged because of the friction between his socks and the carpet. ... The electrons get rubbed and move towards the carpet so the carpets electrons move away and the student becomes negatively charged.

Answer:

b.

Explanation:

-vesign shows the lens is CONCAVE

f=1/power

Answer:

it increases the surface tension of the water

Answer:

7.61 m/s

Explanation:

Given:

Δx = 87.4 m

v = 21.0 m/s

t = 6.11 s

Find: v₀

Δx = ½ (v + v₀) t

87.4 m = ½ (21.0 m/s + v₀) (6.11 s)

v₀ = 7.61 m/s

71.6

Δx = 87.4 m

v = 21.0 m/s

t = 6.11 s

Find: v₀

Δx = ½ (v + v₀) t

87.4 m = ½ (21.0 m/s + v₀) (6.11 s)

v₀ = 7.61 m/s

Answer:

a) nuclear

Explanation:

Answer:

Explanation:

Given:

Mass of bicyclist = 50 kg

Mass of bicycle = 10 kg

Initial velocity (u) = 5 m/s

Final velocity (v) = 10 m/s

Find:

(a) What was the total kinetic energy before accelerating = ?

(b) What was the total kinetic energy after accelerating = ?

(c) How much work was done to increase the kinetic energy of the bicyclist = ?

Computation:

Total mass (M) = 50 kg + 10 kg = 60 kg

1. The total kinetic energy before accelerating = 1/2[Mu²]

The total kinetic energy before accelerating = 0.5[(60)(5)²]

The total kinetic energy before accelerating = 750 J

2. The total kinetic energy after accelerating = 1/2[Mv²]

The total kinetic energy after accelerating = 0.5[(60)(10)²]

The total kinetic energy after accelerating = 3,000 J

3. Total work done = Δ K.E

Total work done = 3,000 J - 750 J

Total work done = 2,250 J

Answer:

Inclined Plane is the answer

Answer:

Inclined plane

Explanation:

It is called Inclined plane since it is a flat surface at an angle.

Answer:

any object that has density more than 1.4

Explanation:

The object that has density more than 1.4 is denser than the honey

Answer:

0.71s

Explanation:

From Newton's law of motion ;

V =U +gt

V is the final velocity or speed

U is the initial velocity or speed

g is acceleration of free fall due to gravity given as 9.8m/S2

Note when a body moves horizontally down its said to do so with the aid of the force of gravity

Hence the final velocity is aided by gravity.

From the above formula;

t =V-U/ g

t= 12-5/ 9.8 = 0.71s

Answer: .71

Explanation:

Khan academy

Answer:

0.50v

Explanation:

Now EMF is induced when there is motion of a conductor in an electric field. Michael Faraday in the annals of scientific history discovered this.

This is expressed mathematically as;

E = Magnetic field / t

but t = d/ v; d- distance, v-velocity, time

Hence E = magnetic field/ d/v

= Magnetic field× v/ d

= 0.02×30/ 1.2= 0.5

Answer:

The correct answer is B.

The astronaut will know due to the light from the explosion.

Explanation:

Sound and vibrations require a medium such as air to travel through. Space, there is no air. Only a vacuum. So sound and vibrations are unable to travel. Light requires no medium to travel. It can go through a vacuum.  

Therefore the Astronaut will see a bright flash of light as it travels from the explosion to outer space. It is also important to note that light can travel very far because nothing else interacts with its wave particles and as such, it cannot be impeded.

Cheers!

Answer: because of air resistance. See explanation for further details.

Explanation: Galileo performed an experiment to proof that the time of descent of two different masses is independent of time.

But in reality this is most likely not true because of air resistance and other fluid frictional effects in consideration.

If the experiment is performed in a vacuum, it will always be true that time is independent of masses of two falling objects.

Answer:

Refraction is the bending of life an example would be how when you put a straw in a glass and it looks like the straw gets detached from itself. Reflection is when light bonces off of something an example would be a mirror.

Explanation:

The way a mirror works is the light you see bounces off of the glass and gives your optical sensors the vision of what the glass reflected.

Answer:

Diffraction , refraction and reflection all are property of light that shows its wave nature.

Explanation:

When a light ray passes through a narrow single slit , the superposition of secondary wavelets produced by the same source , is called diffraction.

Example ; Single slit experiment in which the diffraction shows maxima and minima .

The banding of light due to variation in the speed of light when it travels from one medium to another is called refraction.

Example; Divergence or convergence by lenses.

The bouncing back of light from a surface is called reflection.

Example : Mirrors.

Hence all the given topics are explained.

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Answer:

A

Explanation:

Answer:

-8.4°C

Explanation:

From the principle of heat capacity.

The heat sustain by an object is given as;

H = m× c× (T2-T1)

Where H is heat transferred

m is mass of substance

T2-T1 is the temperature change from starting to final temperature T2.

c- is the specific heat capacity of ice .

Note : specific heat capacity is an intrinsic capacity of a substance which is the energy substained on a unit mass of a substance on a unit temperature change.

Hence ; 35= 1× c× ( T2-(-25))

35= c× ( T2+25)

35 =2.108×( T2+25)

( T2+25)= 35/2.108= 16.60°{ approximated to 2 decimal place}

T2= 16.60-25= -8.40°C

C, specific heat capacity of ice is =2.108 kJ/kgK{you can google that}

To solve this we must be knowing each and every concept related to energy. Therefore, -8.40°C is the final temperature of the ice.

In physics, energy is the capacity to accomplish work. It can be potential, kinetic, temperature, electrical, chemical, radioactive, or in other forms.

There is also heat and work—energy inside the process of being transferred through one body to the other. Energy is always classified according to its type once it has been transmitted. As a result, heat transported could become thermal energy, whereas labor done may emerge as mechanical energy.

H = m× c× (T2-T1)

35= 1× c× ( T2-(-25))

35= c× ( T2+25)

specific heat capacity of ice is =2.108 kJ/kgK

35 =2.108×( T2+25)

( T2+25)= 35/2.108= 16.60°

T2= 16.60-25= -8.40°C

Therefore, -8.40°C is the final temperature of the ice.

To know more about energy, here:

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Answer:

ok

Explanation:

Ok

Answer : 60,000 Joule

✑ Given :

✑ To find :

☞ Solution :

✾ Energy = Power × Time ✾

= 2000 × 30

= 60,000 Joule

Hope I helped!

ツ Have a wonderful day / night !♡

~TheAnimeGirl ♪

Answer:

60,000 Joules

Explanation:

GIVEN:

Power = 2kW = 2000 W

Time = 30 sec

REQUIRED:

Energy = ?

SOLUTION:

Power = Energy / Time

Making Energy the subject of formula

Energy = Power × Time

E = 2000 W × 30 s

E = 60,000 Joules

Answer:

Solar energy is a form of Electromagnetic energy

Explanation:

Solar energy is constantly flowing away from the sun and throughout the solar system. Solar energy warms the Earth, causes wind and weather, and sustains plant and animal life. The energy, heat, and light from the sun flow away in the form of electromagnetic radiation (EMR

Answer:

B

Explanation:

The method used by the student to test his claim is  determine how dissolving salt in water affects the specific heat. The correct option is fourth.

The specific heat is the amount of heat required to change the temperature by 1°C. It is denoted by C.

A student claims that water's polarity is the reason it has a high specific heat.

Polarity is determined by the salt dissolved in water. So, to determine how dissolving salt in water affects the specific heat is best method.

Thus, the fourth option is correct.

Learn more about specific heat.

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[tex]answer = 5 \: \: metre \: per \: second\\ distance = 2000 \: m \\ time = 400 \: seconds \\ velocity = \: \frac{distance \:t ravelled}{time \: taken} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = \frac{2000}{400} \\ \: \: \: \: \: \: \: \: \: = 5 \: metre \: per \: second \\ hope \: it \: helps[/tex]

Answer:

Principal of Conservation of Energy states that " Energy is neither created nor destroyed. However, It is just converted to other forms of energy"

Answer:

k = 2560 N/m

Explanation:

To find the spring constant, you take into account that all the kinetic energy of the block becomes elastic potential energy in the spring, when the block compressed totally the spring:

[tex]K=U\\\\\frac{1}{2}mv^2=\frac{1}{2}kx^2[/tex]

m: mass of the block = 4.0kg

v: velocity of the block just before it hits the spring

x: compression of the spring = 0.25m

k: spring constant = ?

You solve the previous equation for k:

[tex]k=\frac{mv^2}{x^2}[/tex]     (1)

Then, you have to calculate the velocity v of the block. First, you calculate the acceleration of the block by using the second Newton law:

[tex]F=ma[/tex]

F: force over the block = 10.0N

a: acceleration

[tex]a=\frac{F}{m}=\frac{10.0N}{4.0kg}=2.5\frac{m}{s^2}[/tex]

With this value of a you can calculate the final velocity after teh block has traveled a distance of 8.0m:

[tex]v^2=v_o^2+2ad[/tex]

vo: initial velocity = 0m/s

d: distance = 8.0m

[tex]v=\sqrt{2ad}=\sqrt{2(2.5m/s^2)(8.0m)}=6.32\frac{m}{s}[/tex]

Now, you can calculate the spring constant by using the equation (1):

[tex]k=\frac{mv^2}{x^2}=\frac{(4.0kg)(6.32m/s)^2}{(0.25m)^2}=2560\frac{N}{m}[/tex]

hence, the spring constant is 2560 N/m

Answer:

5.) 16.8 m/s

6.) 16.1 mph

7.) Moving fast.

Explanation:

5.) From the question, the total time will be:

7:33 am to 7:45 am = 12 minutes

As the car turns around,

7 : 45 am to 8 : 00am = 15 minutes

As you get back in the car and drive 15

miles north to school at a constant speed arriving at school at 8:29 am

8:00am to 8:29 am = 29 minutes

Total time = 12 + 15 + 29 = 56 minutes

Convert the minutes to second by multiplying the result by 60

Total time = 56 × 60 = 3360 seconds

Total distance covered will be

10 miles + 10 miles + 15 miles = 35 miles

Convert mile to meter by multiplying the result by 1609.344

35 × 1609.344 = 56327.04

Speed is a scale quantity. It only involves magnitude but no direction.

Average speed = total distance/total time

Average speed = 56327.04/3360

Average speed = 16.764 m/s

6.) Velocity = displacement/time

Velocity is a vector quantity. We will consider both the magnitude and direction

Total displacement = 10 miles - 10 miles + 15 miles = 15 miles.

Total time = 56 minutes

Convert minutes to hours by dividing it by 60

Total time = 56/60 = 0.93 hours

Substitute the time and displacement into the formula

Velocity = 15/0.93 = 16.07 mph

7.) . If you looked at your speedometer on your drive to school and it read 30mph, this value describes you move with a fast speed.

Answer:

Power, P = 480 W

Explanation:

It is required to find the power used by 4 A appliance that is plugged into a 120 V circuit for 4 minutes. Power used by an appliance is given by the formula as follows :

[tex]P=VI[/tex]

Plugging all the values we get :

[tex]P=120\times 4\\\\P=480\ W[/tex]

So, the power used by the appliance is 480 W.

Answer:The first is the magnitude of the force applied on the body and the second is the perpendicular distance from the line of action of force and the axis of rotation of the body.

Explanation: