Questions -

4.3 Calculate the unknown forces X and Y for the

balanced beam shown.

1.0 m+

2.5 m

te)

X

400N

Answer:

Explanation:

The resistance of this device is determined by using the formuia from Ohms Law:

V = IR

where; V = voltage

I = current

R = resistance

From the above equation:

R = V/ I ---- (1)

And

I = P/V    --- (2)

If 1 unit = 1 KWH = 3.6 × 10⁶ J

Then;

2.2 units = (3.6 × 10⁶ × 2.2)

= 7.92 × 10⁶ J

So, Energy = 7.92 × 10⁶ J

Also:

Power = energy/time

Power =  7.92 × 10⁶ J / 1 hour

Power = 7.92 × 10⁶ J / 3600 seconds

Power = 2200 Watts

From equation (2)

I = P/V

I = 2200/220

I = 10 A

Recall that:

Resistance R = V/I

Resistance R = 220/10

Resistance R = 22 ohms

SO, if 1 unit costs = Ts 6.00

Then the cost of 2.2 unit = 2.2 ( Rs  6.00)

= Rs 13.20

Answer:

AA

Explanation:

This is flower which is the example of allele

Answer:

B. Solid

Explanation:

Solid particles have the least amount of energy, and gas particles have the greatest amount of energy. The temperature of a substance is a measure of the average kinetic energy of the particles. A change in phase may occur when the energy of the particles is changed. There are spaces between particles of matter.

hope i helped have a great day

Answer:

B. Soild

Explanation:

I dont feel like explaning (:

Answer:

1 kg at 1 m/s

Explanation:

less weight to propell it forward

Answer:

Explanation:

a = -g = -9.80 m/s squared

d o  = 0

v o =  0

t = 1.8s

d = ?

v = ?

Answer:

9996kg.m/s

Explanation:

∆p=mv. 1200kg*8.33m/s

The approximate momentum of this car is 9,996 Kgm/s.

Given the following data:

To determine the approximate momentum of this car;

Momentum refers to the product of the mass possessed by an object and its velocity.

Mathematically, momentum is giving by the formula;

[tex]Momentum = mass \times velocity[/tex]

Substituting into the formula, we have;

[tex]Momentum = 1200 \times 8.33[/tex]

Momentum = 9,996 Kgm/s.

Read more on momentum here: https://brainly.com/question/15517471

Explanation: It is because when a car is moving both the car and the driver is in inertia of motion. When a car is involved in collision it comes to a sudden stop and the car comes into inertia of rest whereas the person still in inertia of motion moves forward and might result in major injuries. But this can be prevented by wearing a seatbelt

Hope it helps :)

Answer:

you can tell them it is the amount of "push" on an object then you can explain using a soccer ball being kicked or a cart being pushed

Explanation:

Answer:

See the answer below

Explanation:

The two correct options are:

1. The student traveled the fastest between 4 and 5 minutes

2. The average speed of the student is 4 meters per minute

Between 4 and 5 minutes, the approximate distance of 7 meters covered by the student is the longest of all the distances covered per minute. Since speed is a measure of distance covered relative to time, it means that the student traveled the fastest between these periods.

The average speed is calculated by dividing the total distance traveled by a body by the total time taken to cover the distance.

From the graph:

Total distance covered = 20

Total time taken = 5

Average speed = 20/5 = 4 meters per minute

All the remaining conclusions are incorrect or indeterminate going by the information on the graph.

Answer:

9.8m\sec

Explanation:

free falling neglecting the air drag so its acceleration will be the acceleration due to gravity

Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 18 × 1.62

We have the final answer as

Hope this helps you

Answer:

[tex]\boxed {\boxed {\sf 300 \ Newtons }}[/tex]

Explanation:

Force can be found by multiplying the mass by the acceleration.

[tex]F=ma[/tex]

The mass is 150 kilograms and the acceleration is 2 meters per second per second, or 2 meters per square second.

[tex]m= 150 \ kg \\a= 2 \ m/s^2[/tex]

Substitute the values into the formula.

[tex]F= 150 \ kg * 2 \ m/s^2[/tex]

Multiply.

[tex]F= 300 \ kg*m/s^2[/tex]

[tex]F= 300 \ N[/tex]

The force of the object is 300 Newtons.

Answer: Speed and velocity are both measured using the same units. The SI unit of distance and displacement is the meter. The SI unit of time is the second. The SI unit of speed and velocity is the ratio of two — the meter per second .

Explanation: Hopefully this helps you.

Answer:

The ratio is  [tex]k:d = 1 : 5[/tex]

Explanation:

From the question we are told that

   The first minimum of the single slit pattern falls on the fifth maximum of the double slit pattern.

Generally the condition for constructive interference for as single slit is  

     [tex]ksin(\theta) = n\lambda[/tex]

Here  k is the width of the slit  and n is the order of the fringe and for single slit n =  1 (cause we are considering the first maxima)

Generally the condition for constructive interference for as double slit is    

        [tex]dsin\theta = m\lambda[/tex]

Here  d is the separation between the  slit  and m is the order of the fringe and for double slit  m  =  5  (cause we are considering the first maxima)

=>     [tex]dsin\theta = 5\lambda[/tex]

So

       [tex]\frac{ksin(\theta)}{dsin(\theta)} = \frac{\lambda}{5\lambda}[/tex]

=>    [tex]\frac{k }{d} = \frac{1}{5}[/tex]

So  

      [tex]k:d = 1 : 5[/tex]

Answer:

__4__  

electrons and electric current move easily  

__3__  

provides a path for electrons to flow  

__2__  

Prevents electrons from moving  

__1__  

flow of an electrical charge in a circuit

Explanation:

Answer:

The sea bed is 1125 m deep.

Explanation:

Speed

It's the rate of change of the distance (d) traveled by an object over time (t).

The speed can be calculated by the formula:

[tex]\displaystyle v=\frac{d}{t}[/tex]

It's known the speed of sound in water is v=1500 m/s. A sound wave is sent to the sea bed and bounces back to the ship 1.5 seconds later.

That is the time the wave takes to travel twice the distance from the ship to the sea bed, thus the required distance uses half of that time or t=1.5/2 = 0.75 seconds.

Solving the equation for d:

d = v.t

d = 1500 m/s * 0.75 s

d = 1125 m

The sea bed is 1125 m deep.

Answer:

i hardly havent got teach this sorry

Answer:

  see attached

Explanation:

The drawing shows a battery connected to two lamps in series. There is no switch in the circuit. The schematic below reflects this.

Answer:

calculation presented a speed of 125,000 miles per second (200,000 km/s).

Explanation:

Answer:

Explanation:

The kinetic energy of an object can be found by using the formula

[tex]k = \frac{1}{2} m {v}^{2} \\ [/tex]

m is the mass

v is the velocity

From the question we have

[tex]k = \frac{1}{2} \times 1120 \times {40}^{2} \\ = 560 \times 1600[/tex]

We have the final answer as

Hope this helps you

Answer:

gₓ = 23.1 m/s²

Explanation:

The weight of an object is on the surface of earth is given by the following formula:

[tex]W = mg[/tex]

where,

W = Weight of the object on surface of earth

m = mass of object

g = acceleration due to gravity on the surface of earth = strength of gravity on the surface of earth

Similarly, the weight of the object on Jupiter will be given as:

[tex]W_{x} = mg_{x}[/tex]

where,

Wₓ = Weight of the object on surface of Jupiter = 34.665 N

m = mass of object = 1.5 kg

gₓ = acceleration due to gravity on the surface of Jupiter = strength of gravity on the surface of Jupiter = ?

Therefore,

[tex]34.65 N = (1.5 kg)g_{x}[/tex]

[tex]g_{x} = \frac{34.65 N}{1.5 kg}[/tex]

gₓ = 23.1 m/s²

Answer:

acceleration= velocity/time

60km/hr = 60 km /60 mins = 1km/min so accn = 1km/5= 1000m/5 = 200m/m

v²= u²+2as

(1000)² = 0²+ 2 x 200 x s

(1000)²/400= s

2500m