When electrons are accelerated by 2450v in an electron microscope they will have wavelengths of
a)8.113nm
b)0.622nm
c)0.811nm

Answer:

B. The volume of an object is the same as the

weight of that object.

Explanation:

Every thing else is right and that one is wrong.

Answer:

B. The volume of an object is the same as the

weight of that object.

Explanation:

i hope it helps

Answer:

21.6 kN

Explanation:

F = m * a

F = 54 000 * .4  = 21600 N

Answer:54,000 N

Explanation:

Answer:

initially- with positive potential differences - the current is directly proportional to the p.d. However, as the current through the filament increases, the heating effect caused in the lamp also increases and so the temperature of the filament rises. This increase in the filament's temperature also increases the resistance of the filament. As a result the rate of increase of the current decreases and a greater change in the potential difference is required to cause a change in the current. This can be seen on the curve as the gradient becomes more shallow (greater resistance). This same pattern is repeated when a negative potential difference is applied across the filament

Answer:

option b

Explanation:

when the two forces act in opposite directions there effective magnitude decreases.

Answer:

b. difference between two factors

Explanation:

When two forces act in the opposite directions, the net force is the difference between them.

Density can be found when mass and volume is known. The density of 5 liter of water is 1000kg/m³.

The density ρ of any substance is the ratio of mass m and its volume V.

ρ = m/V

Given is the mass of water as 5 kg and the volume is 5 liter.

as, 1 L = 10−³m³

So, 5 L = 5×10−³m³

Then, density would be

ρ = 5kg / 5×10−³m³

ρ = 1000 kg/m³

Thus, the density of 5l of water is 1000kg/m³.

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Answer:

-19.39

Explanation:

The displacement of the dolphin in that time will be34.2826m.

To find the displacement of the dolphin, we can use the equations of motion. The displacement can be calculated using the following equation:

d = v initial(t) + 1/2at²

We are given that,

Acceleration (a) = -1.77 m/s² (negative because it's decelerating)

Time (t) = 3.33 s

Final velocity (final v final) = -8.77 m/s

To find the initial velocity, we can use another kinematic equation:

final= Vinitial + Vfinal =v initial +at

Now, plug in the values:

v initial= − 8.77m/s − ( −1.77m/s²)× 3.33s

v initial=−8.77m/s−(−1.77m/s²)×3.33s

v initial =- 2.8769m/s

Now that we have the initial velocity, we can find the displacement using the first equation:

d = v initial(t) + 1/2 at²

d = - 2.8769m/s  × 3.33 s + 1/2(-1.77 m/s²) × 3.33s

d = - 34.2826m

The displacement of the dolphin in that time is - 34.2826m. The negative sign indicates that the displacement is in the opposite direction of the initial velocity.

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Answer:

2381.4 N

Explanation:

1350 * 9.8 * .18 = 2381.4 N

Answer:

128J

Explanation:

K.E = MV² ÷ 2

K.E = 16 × 4² ÷ 2

K.E = 16 × 16 ÷ 2

K.E = 256 ÷ 2

K.E = 128J

:. it's kinetic energy is 128Joules(J)

Answer:

I drive my car at a speed of 30m/s is speed

I drive my car at a speed of 30m/s northward is velocity

Answer:

13.33 gm/cm^3

Explanation:

Displacement of liquid =

 34 gm /  2.3 gm/cm^3 = 14.783  cm^3

so the VOLUME of the object is 14.783 cm^3

  density  =  197 gm / 14.783 cm^3 = 13.33  gm/cm^3

True,Voltage is only produced when the wire is moving but not when the magnet is moving.

The physical interplay of electric charges, magnetic moments, and the electromagnetic field is known as electromagnetism.

The electromagnetic field can be static, moving slowly, or forming waves. Electromagnetic waves are commonly referred to as light and are subject to optics laws.

True,Voltage is only produced when the wire is moving but not when the magnet is moving.

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If the voltage decreases to one-third of its original amount while the resistance remains constant.  The resulting current will be 0.4 A.

The current is the stream of electrons flowing from positive terminal of the battery to the negative terminal so as to generate electricity.

The circuit has a current of 1.2 A.

When the resistance  is constant, the voltage is proportional to current. According to the ohm's law,

V₂ / V₁ = I₂ / I₁

Substitute V for V₁ , V /3 for V₂ , 1.2 for I₁ , we get the resulting current,

I₂ = 0.4 A

Thus, the resulting current will be 0.4 A.

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Answer:

1. By streching

2. false

3. building stronger muscles and bones

4. riding your bike

Explanation:

The routine of exercise begins with the usual basic step of stretching the body.

An essential component of a healthy lifestyle is exercise. Exercise can help you cope with stress and prevent health issues while also enhancing energy and strength. It can also help you control your appetite and keep your weight in a healthy range.

Here,

1. The routine of exercise begins with the usual basic step of stretching the body.

2. People don't have to necessarily go to the gym to get exercise, because exercise includes the activities from the basic one to difficult methods. So, you can do some kind of exercise at the home itself. So, the statement is false.

3. An advantage to exercising is building stronger muscles and bones.

4. Riding your bike is an example of exercise.

Hence,

The routine of exercise begins with the usual basic step of stretching the body.

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Answer:

Barred Spiral.

The vessel's average speed for the entire journey will be 5.86 knots. The area of the distance-time graph shows the velocity.

Distance is a numerical representation of the distance between two objects or locations.

Distance can refer to a physical length or an estimate based on other factors in physics or common use. |AB| is a symbol for the distance between two points A and B.

The given data in the problem is;

Distance travelled 1 (D₁)= 6 nautical miles

Velocity (V₁) 8 knots.

Time (T₁)=

Distance travelled 2 (D₂)=5 nautical miles,

Time taken(T₂)=45 minutes=0.75 hour

Time taken(T₃)=30 minutes

Time for anchor 1 (t₁)=1 hour

Time for anchor 2(t₂)=0.5 hour

Time to sailing back to port(t₄) = 1 hour

The time for the first phase of motion;

[tex]\rm d = v\times t \\\\ t_1= \frac{D_1}{v} \\\\ t_1= \frac{6}{8} \\\\ t_1= 0.75 \ houe[/tex]

The average speed is found as;

[tex]\rm V_{avg}= \frac{Total \ distance }{Total \ time } \\\\ \rm V_{avg}= \frac{6+5+6+5}{0.75+0.5+1+0.5+1} \\\\ V_{avg}=5.866 \ knots[/tex]

Hence, the vessel's average speed for the entire journey will be 5.86 knots.

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Answer:

Zero

Explanation:

When it reaches max height, it stops and begins to fall back down....at this point the velocity = 0

The only option if Ellis wants to stick to one standard serving of alcohol is a 1.5 ounce shot of liquor with 40% alcohol.

In the United States, one standard serving of alcohol contains roughly 14 grams of pure alcohol, which is found in:

Thus, the only option if Ellis wants to stick to one standard serving of alcohol is a 1.5 ounce shot of liquor with 40% alcohol.

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Answer:

Rest: cease work or movement in order to relax, sleep, or recover strength.

Motion: the action or process of moving or being moved.

The force advantage of the direction changing pulley shown  is 1. The correct option is b.

Force is the mechanical physical quantity. The force advantage is equivalent to the mechanical advantage equal to the ratio of output to the input force.

In the single fixed pulley, there is only one rope segment that pulls up on the load, so,

The force advantage is

F.A = 50 N / 50 N  = 1

Thus, the force advantage of the direction changing pulley shown  is 1. The correct option is b.

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Answer:

a Internal core

b The lower mantle

c Butter dough

d Earth rocks

A spring-loaded ballistic cart is in contact with a second cart. The velocity of the other cart is 0.25 m/s.

When there is no external force acting on the system, the initial momentum is equal to the final momentum.

Momentum is equal to the product of mass and its velocity.

According to the conservation of linear momentum,

m₁v₁ +m₂v₂ = m₁u₁ +m₂u₂

u and v represents the initial and final velocity. 1 and 2 represents the first and second cart.

Given is m₁ = 0.5 kg, m₂ =0.8kg, u₁ =u₂ =0 m/s and v₁ = 0.4 m/s.

Substituting the values in the conservation of momentum equation, we get the velocity of second cart is

0.5 x 0.4 + 0.8 x v₂ = 0.5 x 0 + 0.8 x 0

v₂ = +0.25 m/s (in the direction of first cart)

Thus,  the velocity of the other cart is 0.25 m/s.

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Answer:

The pressure of the gas will increase

Explanation:

When gas is put into a container, for example, a balloon, the gas expands to fill the space it can occupy. Since gas is not a solid or a liquid, its particles are all over the place - they are constantly moving and vibrating. As such, when too much gas is blown into a balloon, it will pop. So, when the volume of the container decreases, the pressure of the gas will increase the smaller it gets. Vice versa, the greater the space, the less pressure that will be present in the container.

The amount of exhaust heat discharged per hour from the plant which produces electric energy at the rate of 1. 5 gw, is 9.36×10¹⁹ J/h.

The heat is discharged per hour is equal to the different of total power and actual power.

The plant produces electric energy at the rate of 1. 5 gw. Let assume the efficiency of this power plant is 64% between the temperature of 660 degree C to 330 degree Celsius.

Thus, the maximum efficiency is,

[tex]\eta_{max}=1-\dfrac{660+273}{330+273}\\\eta_{max}=0.55[/tex]

The total power is,

[tex]P_t=\dfrac{P_A}{\eta_{max}\times0.64}\\P_t=\dfrac{1.5}{0.55\times0.64}\\P_t=4.26\rm\; GW[/tex]

Thus, the heat discharged per hour is,

[tex]Q=4.26-1.5\\Q=2.76\text{GW}\\[/tex]

Multiply the value with 3600 to convert it in s/h,

[tex]Q=2.76\times10^9\times3600\text{ J/h}\\Q=9.36\times10^{19}\text{ J/h}\\[/tex]

Thus, the amount of exhaust heat discharged per hour from the plant which produces electric energy at the rate of 1. 5 gw, is 9.36×10¹⁹ J/h.

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you cant what done is done unless you start over. well think of a game it is its own dimension created by man for our entertainment but its not perfect there are glitches and modifications. but you are not the main character only one is and He gives us our own controler our brain. but if your athiest then ask me in the comments. i can explain both ways

Answer:

The world as we know it has three dimensions of space—length, width, and depth—and one dimension of time. But there's the mind-bending possibility that many more dimensions exist out there. According to string theory, one of the leading physics models of the last half-century, the universe operates with 10 dimensions. A dimension arises when a force is generated that allows movement into a new domain. Yes, I personally do believe in them for reasons I can't explain. Dimensional shifts were a phenomenon whereby an object or person is transported from one location to another via folded-space transport or shifted to a parallel universe on a different dimensional plane.

Explanation:

Have a great rest of your day
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The energy per second received by an eardrum will be 5.03×10⁻⁵ J/sec. The energy denotes the sound energy for the eardrum.

The passage of vibrations through matter is characterized as sound energy. When an item vibrates, sound energy is created, resulting in noise.

Sound vibrations induce pressure waves to flow through a material like air, water, wood, or metal.

The threshold of hearing is,5×10⁻¹⁷ sec.

The energy per second received by the eardrum is found by the formula as;

[tex]\rm E_T = Area \times thresold \\\\ \rm E_T = \pi (4 \times 10^{-3})^2 \times 1 \times 10^{-12} \\\\ E_T =5.03 \times 10^{-17}\\\\[/tex]

Hence, the energy per second received by an eardrum will be 5.03×10⁻⁵ J/sec

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Answer:

emotions

Explanation:

emotions are how you feel and can happen any time

Hope it helps <333

Answer:

emotions affect your body and how you feel

Answer:

Work = Force × distance

= m × g × d

= 12 × 9.8 × 0.5

= 58.8 N

If in the case , you need any help pleasee leg me know! [ you'll have to pay btw]

Answer:

Decreasing temperatures

Explanation:

Indicators of climate change :

Hence, option 1 which gives decrease in temperature is not a climate change indicator.

Answer:

Decreasing tempertures

Explanation: