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Answer:

sdf

Explanation:

Answer: The correct option is A.

Nuclear fusion.

Explanation:

It is nuclear fussion because nuclear fussion is the process whereby two or more lighter atomic nuclei come together that the forces that pull them together surpasses the forces that might pull them away making them to combine together to form heavier atomic nuclei. Energy is released in nuclear fusion.

Answer:

According to formula of power N = A/t   Given by : N = 125 W and A = 825 J.

Here, N --- power ; A --- work ; t --- time.

Now, we can find the time t = A/N = 6.6 s

Explanation:

Benefits of Driverless Cars:

Answer:

9.66 L

Explanation:

The following data were obtained from the question:

Initial temperature (T1) = 84 ºC

Initial volume (V1) = 10 L

Final temperature (T2) = 72 ºC

Final volume (V2) =..?

Next, we shall convert celsius temperature to Kelvin temperature. This can be obtained as follow:

T(K) = T(°C) + 273

Initial temperature (T1) = 84 ºC

Initial temperature (T1) = 84 ºC + 273 = 357 K

Final temperature (T2) = 72 ºC

Final temperature (T2) = 72 ºC + 273 = 345 K

Since the pressure is constant, it means the gas is obeying Charles' law. Thus, we shall determine the new volume of the gas as follow:

Initial temperature (T1) = 357 K

Initial volume (V1) = 10 L

Final temperature (T2) = 345 K

Final volume (V2) =..?

V1/T1 = V2/T2

10/357 = V2/345

Cross multiply

357 × V2 = 10 × 345

Divide both side by 357

V2 = (10 × 345) / 357

V2 = 9.66 L

Thus, the new volume of the gas is 9.66 L.

Answer:

there is no image

Explanation:

Answer:

7.35 m

Explanation:

We can solve with kinematics or with energy.

Using kinematics, given:

v₀ = 12 m/s

v = 0 m/s

a = -9.8 m/s²

Find: Δy

v² = v₀² + 2aΔy

(0 m/s)² = (12 m/s)² + 2 (-9.8 m/s²) Δy

Δy = 7.35 m

Using energy instead:

PE = KE

mgh = ½ mv²

gh = ½ v²

h = v² / (2g)

h = (12 m/s)² / (2 × 9.8 m/s²)

h = 7.35 m

Answer:

5.3 s

Explanation:

Given:

v₀ = 52 m/s

v = 0 m/s

a = -9.8 m/s²

Find: t

v = at + v₀

0 m/s = (-9.8 m/s²) t + 52 m/s

t = 5.3 s

Answer:

3360m

Explanation:

Given parameters:

  Average velocity of Marta = 4.2m/s

  Time taken for biking  = 800s

Unknown:

Distance traveled  =?

Solution:

Velocity is the rate of change of displacement with time.

  Displacement  = velocity x time

Input the parameters and solve;

 Displacement  = 4.2 x 800 = 3360m

Answer:

Depending on how much is taken and the physical condition of the individual, alcohol can cause:

-Slurred speech.

-Drowsiness.

-Vomiting.

-Diarrhea.

-Upset stomach.

-Headaches.

-Breathing difficulties.

-Distorted vision and hearing.

Explanation:

Answer:

Explanation:

Power is expressed as P = Force * Distance/time

From the formula given, the following parameters is needed to calculate power

1) Work done

2) force

3) Distance

4) Time

From the question, the given data is incomplete. We are supposed to be given the time taken to moved the chair over the distance. with the time we can easily calculate the power used up by the student.

Answer:

The roof of the house is 8.67 m high

Explanation:

Horizontal Motion

When an object is thrown horizontally with a speed v from a height h, the range or maximum horizontal distance traveled by the object can be calculated as follows:

[tex]\displaystyle d=v\cdot\sqrt{\frac {2h}{g}}[/tex]

The boy is on the roof of his house and throws a rock horizontally at v=11.5 m/s. It lands on the ground d=15.3 m from the base of the house. We can use the above equation to find the height of the roof by solving it by h:

[tex]\displaystyle h=\frac{gd^2}{2v^2}[/tex]

Substituting values:

[tex]\displaystyle h=\frac{9.8\cdot 15.3^2}{2\cdot 11.5^2}[/tex]

h=8.67 m

The roof of the house is 8.67 m high

Answer:

846.7Pa

Explanation:

Given parameters:

Force  = 635N

Area = 0.75m²

Unknown:

Pressure  = ?

Solution:

Pressure is the force per unit area on a body.

   Pressure  = [tex]\frac{Force}{Area}[/tex]

Insert the parameters and solve;

  Pressure = [tex]\frac{635}{0.75}[/tex]   = 846.7Pa

Answer:

2 is answer B.

3 is answer D.

3 is answer D because of the fears as to what happened with Chernobyl.

I hope this helps.

Answer:

hope this will help u

Explanation:

Al + CuCl2 => AlCl2 + Cu

Answer:

Higher temperature makes an object less dense 2. Density governs the state of matter for the object, hence as water becomes less and less dense, it becomes gas (water vapour) 3. Higher temperature makes an object has more pressure, hotter gas has higher pressure.

Explanation:

Relation Between Density and Temperature Temperature is the measure of heat. Density is the measure of how closely any given entity is packed or it is the ratio of the mass of the entity to its volume.

I hope this works

Answer:

if we ignore air resistance .. which might slow her down a lot towards the end of the 7 seconds.. but we will just ignore that for this question

Explanation:

then V=Vo+a*t

Vo=0

V=a*t

V=9.8(7)

V=68.6 m/s  just a little over 150 MPH.. but.. I think terminal velocity is close to 120... soo hmm maybe about that fast... but that with air resistance.. so this problem depends a lot on if you're going to ignore that

Answer:

Constant variable: SAME TYPE OF BREAD (Wonder whole wheat), SAME AMOUNT OF WATER (5ml), SAME SIZE OF BREAD SLICE, SAME TEMPERATURE (75°F)

Independant variable: COLORS OF PLASTIC WRAP

Depentant variable: TIME FOR BREAD TO MOLD

Explanation:

In any experiment, the independent variable is the variable that is deliberately changed or manipulated by the experimenter. In this case, the independent variable is the DIFFERENT COLORS OF PLASTIC WRAP USED (red, orange, yellow, green, blue, and purple).

Dependent variable is the variable that the experimenter measures in an experiment. It is the variable that responds to changes made to the independent variable. In this experiment, the dependent variable is the TIME IT TAKES FOR BREAD TO MOLD.

Constant variable, also known as Controlled variable, is the variable that the experimenter keeps constant or unchanged for all groups throughout the experiment. In this experiment, the constants are: SAME TYPE OF BREAD (Wonder whole wheat), SAME AMOUNT OF WATER (5ml), SAME SIZE OF BREAD SLICE, SAME TEMPERATURE (75°F)

Answer:

e=75%=0.75 work output = usful work=240j

Explanation:

Answer: 2.6

Explanation: Just trust me...

The answer is C. Hope this helps!

Answer:

For the car not to strike the deer, the minimum deceleration should be 8 m/s² with a combined instantaneous drivers reaction

Therefore, weather the deer is struck by the car depends on the drivers reaction time and deceleration of the car

Explanation:

The given parameters are;

The distance away from the deer the car was when the driver notices the deer = 25 m

The speed of the car = 20 m/s

Therefore, for the car not to strike the deer, the minimum deceleration of the car should be from 20²/(2 × 25) = 8 m/s² for an instantaneous driver reaction time

For a driver reaction time of 0.5 seconds, we have

Distance moved by car = 0.5 × 20 = 10 meters

Distance of the car from the deer at the start of deceleration = 25 - 10 = 15 meters

Minimum deceleration of the car required = 20²/(2 × 15) = 13.[tex]\bar 3[/tex] m/s²

For the car not to hit the deer, the minimum deceleration should be 8 m/s² with instantaneous driver's reaction.

Car hit the deer will depend on the driver's reaction time and deceleration of the car,

Given here,  

Distance, when driver notice the deer = 25 m  

Speed of the car = 20 m/s

So,  the minimum deceleration

[tex]\bold {= \dfrac {20^2 }{2\times 25} = 8\ m/s^2 }[/tex]

Therefore, for the car not to strike the deer, the minimum deceleration of the car should be 8 m/s² with an instantaneous driver reaction time.

To know more about decceleration,

https://brainly.com/question/4403243

Answer:

F = 64 N

Explanation:

Given that,

Mass of the shopping cart, m = 8 kg

Initial speed of the shopping cart, u = 0

Final speed of the shopping cart, v = 4 m/s

Time, t = 0.5 s

We need to find the magnitude of the force that causes the shopping cart to accelerate. The force is given by the formula as follows :

[tex]F=ma\\\\F=\dfrac{m(v-u)}{t}\\\\F=\dfrac{8\times (4-0)}{0.5}\\\\F=64\ N[/tex]

So, the magnitude of force is 64 N.

Answer:

C A B D E

Explanation:

The newest rocks are always on top, and the oldest rocks are on the bottom.

C. 305 million

A. 200 million

B. 68 million

D. 3 million

E. 800 thousand

The projectiles launch allows to find the answer for the initial velocity of the stone is:

            v = 17.71 m / s

Projectile launching is an application of kinematics for motion in two dimensions, where there is no acceleration on the x axis and the acceleration on the y axis is the gravity acceleration.

In the attached diagram we can see a corner of the movement. Where the x axis is horizontal and the y axis is vertical, where the zero of the system is at the base of the cliff

In this case the stone is thrown horizontally, therefore its initial vertical speed is zero, let's find the time it takes to reach the base of the cliff

           y = y₀ + [tex]v_{oy}[/tex] t - ½ g t²

where y and y₀ are the current and initial position, [tex]v_{oy}[/tex] is the initial vertical velocity, g the acceleration of gravity and t the time

When reaching the bottom its height is zero (y = 0) and the highest part its initial height is y₀ = 25.00 m

           0 =y₀ + 0 - ½ g t²

          t = [tex]\sqrt{\frac{2y_o}{g} }[/tex]

Let'se calculate

           [tex]t = \sqrt{ \frac{2 \ 2.25 }{9.8 } }[/tex]

           t = 2,259 s

They indicate that the stone fell at a horizontal distance of 40 m,

           x = [tex]v_{ox}[/tex] t

            v_{ox} = [tex]\frac{x}{t}[/tex]

           v_{ox}  = [tex]\frac{40}{2.259}[/tex]

           v_{ox} = 17.71 m / s

In conclusion, using theprojectiles launch we can find the answer for the initial velocity of the stone is:

            v = 17.71 m / s

Learn more here:   brainly.com/question/12792922

Answer:

The correct option is;

c. A set of magnets are placed in an electric field. As the current increases or decreases, the strength of the electric field changes, causing the magnet to be more or less moved by the field

Explanation:

A permanent magnet motor is an electric motor that utilizes permanent magnets combined with a coil of electric wire winding rather than there being only the the electric wire windings in the motor

The principle of operation of a permanent magnet motor involves the rotation of a magnetic rotor by the electromagnetic force generated from the outer stator coil when power is supplied to the stator windings from an external source.