A positive charge q is fixed at point (3,−4)(3,−4) and a negative charge −−q is fixed at point (3,0).(3,0).
Determine the net electric force ⃗ netF→net acting on a negative test charge −−Q at the origin (0,0)(0,0) in terms of the given quantities and physical constants, including the permittivity of free space 0.ε0. Express the force using i⁢j unit vector notation. Enter precise fractions rather than entering their approximate numerical values.

Answer:

Summary notes really help and make sure to revise on past papers.Good luck

Explanation:

Give me a like if this helped

Answer:

1.1 m/s

Explanation:

We know in an inelastic collision, applying the principle of conservation of momentum :-

Substituting the values

Answer:

Initial y-component of speed

Vy = 28 * sin 30 = 14 m/sec vertically

1/2 m Vy^2 = 2 m g h    conservation of energy of y-component

h = Vy^2 / (2 * g) = 14^2 / (2 * 9.8) = 10 m

The work is done by the force the viscous medium exerts on the object as it falls 85 cm is -26.35 joules.

   The mass of the object is m = 3.1kg

    The speed of fall is v = 2.5 m/s

    The depth of fall is d = 85cm

Now here given that the velocity is constant, then the work energy is zero.

So, work done by the potential energy of the object and that of the viscous liquid we have

      W = Wv + Wp

Where  Wv is work done by viscous liquid and

Wv is the work done by the object

           Wp = mgd

So  

      0  = Wv + mgd

 Wv = -mgd

substituting values

Wv = -3.1x10x85

Wv = 26.35 joules

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The device which is used to measure potential difference between two points in a circuit is called a voltmeter.

What is a voltmeter?A voltmeter is a type of electrical instrument that is used to measure electrical potential difference between two points in a circuit. It is a type of electromechanical measuring instrument. It typically measures voltage in volts and it is represented by the symbol "V" in a circuit diagram. It is often used in parallel with the component that is being tested. The device which is used to measure potential difference between two points in a circuit is called a voltmeter.

Overall, a voltmeter is an essential tool for any electronics or electrical engineer. It enables engineers and technicians to measure and monitor voltage levels in circuits and devices, and it provides important information for designing and troubleshooting electrical systems.

In conclusion, the device that is used to measure potential difference between two points in a circuit is called a voltmeter. It is a type of electromechanical measuring instrument that measures voltage in volts and it is represented by the symbol "V" in a circuit diagram. Voltmeters are essential tools for measuring and monitoring voltage levels in circuits and devices, and they are used extensively in electronics and electrical engineering.

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The time the trip would take based on the information provided can be expressed as distance/10 mph.

The time of the trip in the boat depends on two factors, the first one is the real speed of the boat and the second one is the distance covered.

Time: Distance/speed

Time: distance/10mph

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Answer:

pun

Explanation:

The information given on the X-axis of the graph attached is the years from 1920-2005 (option B).

A graph in mathematics or statistics is a data chart (graphical representation of data) intended to illustrate the relationship between a set (or sets) of numbers (quantities, measurements or indicative numbers) and a reference set.

A graph consists of two axes namely; X-axis and Y-axis. The x-axis on a graph is usually drawn left to right and usually shows the range of values of an independent variable.

On the other hand, the Y-axis is the axis on a graph that is usually drawn from bottom to top and usually shows the range of values of variable dependent on one other variable.

Therefore, according to the graph illustrated above, the x-axis shows the years from 1920-2005.

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Answer:

You grab (grasp or seize suddenly and roughly.) the pizza with your toes

Explanation:

Answer:

First, you have to wash your toes to get all the germs off.

Next, make sure you have a good grip on the pizza.

Then, make sure you are in a comfortable position.

Next, wrap your leg around your neck so the pizza can reach.

Finally, you can enjoy your pizza.

Hope this helped!

Explanation:

Weight=force=300N

height=2m

time=6seconds

power=?

now,

power (p)=f×h÷t

power=300×2÷6

power=100w

therefore,A man develops 100 watt power in 6 seconds.

Answer:

c. Work occurs when a force acts on an object and causes a displacement of that object

Explanation:

because W=Fd

work= force * displacement

Hurricanes spin as they move due to a phenomenon known as the Coriolis effect, which is caused by the Earth's rotation. The Coriolis effect is a result of the fact that different parts of the Earth rotate at different speeds.

Specifically, the Earth rotates more rapidly at the equator than at the poles.

As air moves from high-pressure areas to low-pressure areas, it is deflected by the Coriolis effect. In the case of a hurricane, the low-pressure area at the center of the storm causes air to flow inward from all directions. As the air moves toward the center of the storm, it is deflected to the right (in the Northern Hemisphere) due to the Coriolis effect. This deflection causes the air to start rotating counterclockwise around the center of the storm.

The rotation of the hurricane becomes more pronounced as the storm gains strength and size, with the wind speed increasing as the storm's pressure drops. The direction of rotation is determined by the hemisphere the storm is in, with hurricanes in the Northern Hemisphere rotating counterclockwise and hurricanes in the Southern Hemisphere rotating clockwise. The rotation of a hurricane is also affected by other factors such as the shape of the coastline and the temperature of the water, but the Coriolis effect is the main cause of the storm's rotation.

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The correct definition of kinetic energy is that kinetic energy is the energy an object has due to its motion.

It is defined as the work needed to accelerate an object from rest to its current velocity. Kinetic energy is proportional to the mass of the object and the square of its velocity and can be calculated using the formula KE = 0.5 × m × v², where m is the mass of the object and v is its velocity.

Kinetic energy is a scalar quantity and has units of joules (J) in the SI system. It is an important concept in physics and has a wide range of applications, from understanding the motion of objects in classical mechanics to describing the behavior of particles in thermodynamics and quantum mechanics.

Therefore, The correct definition of kinetic energy is that kinetic energy is the energy an object has due to its motion.

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Answer:

Burrowing animals can cause weathering. By digging for food or making space to live in the animal may break apart rock. The growing roots of a tree can also break apart rock.

Horizontal motion is defined as a projectile motion in a horizontal plane depending upon the force acting on it. For a short distance, the vertical and horizontal components of a projectile are perpendicular and independent of each other.

Answer:

A projectile moves along its path with a constant horizontal velocity

Answer:

Cement and sand will do

Explanation:

because without it you can't build

Answer:

Shape of houses built in areas with hot climate

Compact house forms, rather than sprawling, multi-wing designs work best in hot locales. Home designs with shaded porches, wrap around porches or plans with courtyards that create a shaded open area within the building are ideal.

How do you build a house in hot climates?

Place courtyards centrally to enhance cooling and ventilation. ...

Choose the right materials. ...

Use waterbodies and landscaping effectively. ...

Shade terraces and outdoor spaces. ...

Create sheltered, barrier-free spaces for air circulation. ...

Extend roofs to protect the walls and windows from direct heat.

Materials used building in areas with hot climate

The most common materials used for building walls in the warm-humid regions are stones, and earth-based bricks.

Concrete, bricks, and tile have a high thermal mass due to the large amount of heat energy needed to change their temperatures. This makes concrete an ideal building material for climates that are hot during the day but cooler at night.

Answer:B ez

Explanation:

Answer:

All 7 Dragonballs

Explanation:

the dragonball Summon shenron which will then grant you a wish

Answer:

-17.5 nC

Explanation:

charge A = -30 nC

charge B = -5 nC

After adding them it would be the average of the two charges because of the getting same voltage difference. so

c = (-30+(-5)) / 2 nC

c= -17.5 nC

answer is -17.5 nC

If the cells are left at room temperature after lysing and adding ONPG, the reaction between ONPG and the remaining active beta-galactosidase in the lysed cells may proceed too slowly or not at all, leading to inaccurate results.

The reaction between ONPG and beta-galactosidase is an exothermic reaction and is temperature dependent, meaning that it proceeds more rapidly at higher temperatures.

Placing the lysed cells back in the water bath after lysing and adding ONPG ensures that the reaction is taking place at a consistent temperature, allowing for accurate and reproducible results.

Leaving the cells at room temperature may result in variations in reaction rate, leading to inconsistencies in the data. To ensure accurate results, it is important to control the temperature during the reaction.

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The acceleration due to gravity on the planet is approximately 9.8 m/s^2.

The acceleration due to gravity on the planet can be determined using the following equation:

a = (vf^2 - vi^2) / (2 * d)

where:

a = acceleration due to gravity

vf = final velocity (15.0 m/s)

vi = initial velocity (5.0 m/s)

d = displacement (20.0 m)

Plugging in the values, we get:

a = (15.0 m/s^2)^2 - (5.0 m/s)^2) / (2 * 20.0 m)

a = approximately 9.8 m/s^2

Therefore, the acceleration due to gravity on the planet is approximately 9.8 m/s^2.

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The heat required for the change of state of the materials in the question  are;

4. a. 894000 J, b. 423000 J, c. 8040 J

5. 0.096 kg

6. 321 kJ/kg

7. a. Copper; 287625 J, Silver; 108307 J, Gold; 67795 J

b. 0.0598 kg

8 a. 1302.46 °C

b. 11157 J

Specific latent heat is the amount of heat energy required to change the state of a substance while the temperature of the substance remain the same.

4. The energy needed to evaporate;

a. 3 kg of petrol (octane) = 3 kg × 298000 J/kg = 894000 J

b. 500 g of ethanol = 0.5 kg × 846000 J/kg = 423000 J

c. 20 g of vineger (acetic acid) = 0.02 kg × 402000 J/kg = 8040 J

5. The mass of the liquid ethanol that can be evaporated by supplying 80 kJ of energy = (80 kJ)/(846 kJ/kg) ≈ 0.096 kg

6. The specific latent heat of melting of aluminium = (6420 kJ)/(20 kg) = 321 kJ/kg

7. a. The energy needed to heat each sample to its melting point:

Copper: m·c·ΔT = (0.5 kg)×(390 J/kg°C)×(1495°C - 20°C) = 287625 J

Silver: m·c·ΔT = (0.5 kg)×(230 J/kg°C)×(961.8°C - 20°C) = 108307 J

Gold: m·c·ΔT = (0.5 kg)×(130 J/kg°C)×(1063°C - 20°C) = 67795 J

7. b. The amount of copper that melts:

Energy needed to heat copper to its melting point: Q1 = m·c·ΔT = (0.5 kg)×(390 J/kg·°C)×(1495°C - 20°C) = 287625 J

Energy remaining for melting; Q2 = (300 kJ) - Q1 = (300000 J) - (287625 J) = 12375 J

Mass of copper that melts; m = Q2/Lf = (12375 J)/(207000 J/kg) ≈ 0.0598 kg

Extra challenge:

8a. Final temperature of the liquid silver;

Energy needed to heat silver to its melting point; Q1 = m·c·ΔT = (0.5 kg)×(230 J/kg·°C)×(961.8°C - 20°C) = 108307 J

Energy needed to melt silver: Q2 = m·L·f = (0.5 kg)×(88000 J/kg) = 44000 J

Energy remaining for heating liquid silver: Q3 = (200 kJ) - Q1 - Q2 = 200000 J - 108307 J - 44000 J = 47693 J

Final temperature of the liquid silver: ΔT = Q3/(m·c) = 47693/(0.5×280) ≈ 340.66

\(T_f\) ≈ 961.8 + 340.66 = 1302.46

The final temperature is about 1302.46 °C

8 b. Energy needed to obtain liquid gold at a temperature of 1200°C

Energy needed to heat gold to its melting point; Q1 = m·c·ΔT = (0.05 × 130 × (1063 - 20) = 6779.5

Energy needed = 6779.5 J

Energy needed to melt gold; Q2 = m·Lf = (0.05 kg)×(67000 J/kg) = 3350 J

Energy needed to heat liquid gold from its melting point to final temperature; Q3 = m·c·ΔT = (0.05 kg) × (150 J/kg·°C) × (1200°C - 1063°C) = 1027.5 J

The sum of the energy required, Q = Q1 + Q2 + Q3 = 6779.5 + 3350 + 1027.5 = 11157

The total energy required is 11157 J

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Answer:

14,400m

Explanation:

The formula for calculating speed is S=D/T.

S=speed( in meters per second- m/s)

D=distance(in meters)

T=time( in seconds)

For our case:

S=40m/s

D=?

Time=2 hours=60min x 60 sec=3600seconds

Now make D the subject.

D=S x T

D=4m/s x 3600s=14,400m

Therefore our answer is

14 400 m or 14.4 km

Answer:

true

Explanation:

Because the more mass you have, the faster the speed and the greater its potential energy, which is a storage energy.

The maximum R/C for CP-1 at sea level would be  184np.

Given data of CP -1

wing spam (b) = 35.8 ft. = 10.912m

wing area (s) = 174ft² = 16.1651m²

Gross weight W = 2950lb = 13127.5 N

Sfc = 0.45 lb /hp-hr

Engine = piston engine of 230hp

Cdo = 0.025

e =  0.8 , η propeller = 0.8

ρses = 0.002377 slug/ft³

V(∞) = 136.4 m/hr

As a/p is cruising L= W , T=D

L=W = 1/2 ρ(∞) V(∞)²SCl = W

Cl= 2W/ρSV² = 0.387

C(D) = C(do) + ηCl²

k= 1/2πARc

C(D) = 0.025 +(1/π ×7.37×0.8)×0.397²

C(D) = 0.0319

L/D = C(l) = 0.357/0.0319 = 11.2

(4) L = W

T(R)= [W/(L/D)] = 11721.1N = 263.5lb

Max. velocity at sea level

For a propellor engine , max velocity, is determined by the intersecting point of Pav and Pr curve.

Pav = bnP ×ηp = 230×0.8 = 184np

Thus, the  the maximum R/C for CP-1 at sea level is 184np.

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Answer:

The potential energy stored in molecules can be converted to chemical energy, which can ultimately be converted to kinetic energy, enabling an organism to move. Eventually, most of energy used by organisms is transformed into heat and dissipated.

Explanation:

Answer:

2, Ocean waves

Explanation:

Transverse waves look more like ocean waves, and have the same movement.