Can anybody help??????

Explanation:

t = usin©/g

Where t is the time to reach the maximum height

Time spent in air is T = 2t

Hence, T = 2usin©/g

T = 2 x 20 x sin 65°/ 9.8

T = 3.69s

A hydrogen fuel cell vehicle is different from internal combustion engine as in fuel cell, hydrogen combines with oxygen whereas in internal combustion engines, gasoline is used.

In a internal combustion engine or fuel cell vehicle, the hydrogen fuel is combined with oxygen atom. While the combustion in a hydrogen- fuel or in a gasoline-powered engine is converted into mechanical energy, however in the hydrogen fuel cell vehicle, the chemical energy from the hydrogen and oxygen is converted into electrical energy.

Both hydrogen internal combustion engines and the hydrogen fuel cells can power vehicles using hydrogen, a zero-carbon fuel. Hydrogen engines burn hydrogen gas in an internal combustion engine, in the same way as the gasoline is used in a power engine. Examples of hydrogen internal combustion engines include gasoline engines, diesel engines, gas-turbine engines, and rocket-propulsion systems.

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Answer:

its D

Explanation:

i just got it correct on a. p. e. x. :)

Answer:

273.15 dat is the answer im pretty sure

Answer:

9.6 Amperes

Explanation:

1/R = 1 /5 + 1/5 + 1/5 + 1/5

solving for R we get 5/4 ohms

then from V=IR

I = V/R

I=12/(5/4)

hence I= 9.6 Amperes

A 12.0-volt battery is connected in a series, then the current through the battery is 9.6 A.

Electrical resistance is implemented as a circuit element by resistors, which are passive two-terminal electrical components. Resistors are devices that are used in electronic circuits for a variety of purposes, including lowering current flow, adjusting signal levels, dividing voltages, biasing active components, and terminating transmission lines.

As part of motor controllers, power distribution systems, or as test loads for generators, high-power resistors that can dissipate many watts of electrical energy as heat may be used.

According to the question,

1/R = 1 /5 + 1/5 + 1/5 + 1/5

R = 5/4 ohms

By ohm's law,

V=IR

I = V/R

I=12/(5/4)

I= 9.6 Amperes

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Answer:

valence

Explanation:

Explanation:

The amount of CD is 35 g, and the amount of AC is 40 g.

Explanation:

AB + CD \rightarrow AC + BDAB+CD→AC+BD

The law of conservation of mass states that in any chemical reaction, the total mass of the reactants must be equal to the total mass of the products.

In this reaction, we know the mass of one reactant (AB, 15 g) and the mass of one product (BD, 10 g). In order to have the same total mass on the left side and on the right side of the equation, the mass of AC must be 5 g more than the mass of CD. We see that the only choice that satisfies this condition is:

The amount of CD is 35 g, and the amount of AC is 40 g.

In fact, if we assume these masses are correct, we have:

- on the reactant side: m(AB)+m(CD)= 15g + 35g = 50g

- on the product side: m(AC)+m(BD)= 40g + 10g = 50g

so, we have the same mass on both sides of the equation, and the law of conservation of mass is satisfied.

Answer:

B is  the answer on edge

Explanation:

B: The amount of CD is 35 g, and the amount of AC is 40 g.

Answer:

Temperature, T2 = 300 Kelvin

Explanation:

Given the following data;

Initial volume = 100 Liters

Initial temperature = 200 Kelvin

Final volume = 150 Liters

To find the final temperature T2, we would use Charles' law.

Charles states that when the pressure of an ideal gas is kept constant, the volume of the gas is directly proportional to the absolute temperature of the gas.

Mathematically, Charles is given by;

[tex] \frac {V}{T} = K[/tex]

[tex] \frac{V1}{T1} = \frac{V2}{T2}[/tex]

Making T2 as the subject formula, we have;

[tex] T_{2}= \frac{V_{2}}{V_{1}} * T_{1}[/tex]

Substituting into the formula, we have;

[tex] T_{2}= \frac{150}{100} * 200[/tex]

[tex] T_{2}= 1.5 * 200 [/tex]

Temperature, T2 = 300 Kelvin

Answer:

A

Explanation:

Answer:

a- true

Explanation:

i did the test and its correct

Answer: D.

Explanation: Just took the quiz.

Answer:

D. F represents the activation energy

Explanation:

Answer:

я не знаю старайся изо всех сил

Explanation:

[tex]\huge{\mathbb{\tt { QUESTION↓}}}[/tex]

[tex]\color{green}{\tt State \: and \: explain \: the \: disadvantages}[/tex]

[tex]\color{green}{\tt { of \: anomalous \: expansion \: of \: water}}[/tex]

[tex]\huge{\mathbb{\tt {ANSWER↓}}}[/tex]

[tex]{\boxed{\boxed{\tt { DISADVANTAGES \: of \: anomolous \: expansion \: of \: water }}}}[/tex]

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Answer:

'Wave' is a common term for a number of different ways in which energy is transferred: In electromagnetic waves, energy is transferred through vibrations of electric and magnetic fields. In sound waves, energy is transferred through vibration of air particles or particles of a solid through which the sound travels.

Answer:

Space radiation is made up of three kinds of radiation: particles trapped in the Earth's magnetic field; particles shot into space during solar flares (solar particle events); and galactic cosmic rays, which are high-energy protons and heavy ions from outside our solar system.

Explanation:

Answer:

7 J

Explanation:

Given that,

A sphere is released into the atmosphere where air resistance is present.

The lose in energy is equal to 7 J

We need to find the gain in its kinetic energy.

We know that, as per the law of conservation of energy,

Loss in potential energy = gain in kinetic energy

⇒

Gain in kinetic energy = 7 J

Hence, the gain in kinetic energy is 7 J.

Answer:

45 N to the right possibly?

(8 and 2/3) millimeters per second.

That's about 0.02 mile per hour.

Answer:

9×1/2×10=45J

Explanation:

[tex]w = f \times d \times \cot( \beta ) [/tex]

f=9N

d=10m

cos(B)=1/2

Answer:

I think its the Blue wave, im not sure so dont take my word for it.

Explanation:

Answer: it’s the green wave

Explanation: trust me bro

Answer:

W = 96.875 N

Explanation:

For this exercise let's use the law of universal gravitation

          F = [tex]G \frac{m M }{r^2}[/tex]

we substitute this force in Newton's second law

          F = m a

          G \frac{m M }{r^2} = m a

          a = [tex]G \frac{M}{r^2}[/tex]

This sidewalk we will call it gravity acceleration

           g₀ = a

the weight of a body is

         W₀ = m g₀

if we change the cario of r ’= 4r

          a’=  [tex]G \frac{M}{r'^2 }[/tex]

          a ’= G \frac{M}{(4r)^2 }

           a' = [tex]G \frac{M}{r^2} \ \frac{1}{16}[/tex]

          a ’=  [tex]\frac{g_o}{16}[/tex]

therefore the weight of the body must be

           W = m g = [tex]m \ \frac{g_o}{16}[/tex]

           W = W₀ / 16

            W = 1550/16

            W = 96.875 N

Answer:

I believe it is D. Based on the point and it being Position vs. time I believe D makes the most sense. Sorry if I am wrong!

Explanation:

Answer:

25/30 = 0.83

Explanation:

I took this class

Answer:

Explanation:

540

Answer:

15129.8 Kg•m/s

Explanation:

From the question given above, the following data were obtained:

Mass = 2020 kg

Velocity = 7.49 m/s

Momentum =?

Momentum is simply defined as the product of mass and velocity. Mathematically, it is expressed as:

Momentum = mass × velocity

With the above formula, we can obtain the momentum of the Elephant as follow:

Mass = 2020 kg

Velocity = 7.49 m/s

Momentum =?

Momentum = mass × velocity

Momentum = 2020 × 7.49

Momentum = 15129.8 Kg•m/s

Thus, the momentum of the Elephant is 15129.8 Kg•m/s

Answer:

circular motion

Explanation:

Circular motion can be regarded as

movement of particular object along the circumference in a circle. It is

rotation of particular object along a circular path. Circular motion could be

uniform, along with constant angular rate of rotation as well as constant speed. It could also be non-uniform along with changing rate of rotation. The acceleration that is been experienced when one is in uniform circular motion is called"Centripetal acceleration"

Convection currents is type of current that takes place after a reservoir of fluid has been heated at the bottom, then cool at the top.the fluid expand as a result of Heat , then density decreases, the plates on top of them is been carried as a result of circular motion of the convection

A convention current is a circular movement which is set up due to temperature difference between two layers of a fluid.

A convention current is a movement which is set up due to temperature difference between two fluids.

Convection currents are set up in liquids and gases.

Hotter and less dense fluids move upwards while colder and denser fluids move downwards.

Therefore, convection currents involve circular motion.

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Answer:

117

Explanation:

the formula is P1V1 over T1 is equals to P2V2 over T2

Explanation:

I think you are 100℅ clear.

Answer:

Fue mas velóz en los 100 m.

[tex]v_{1}=9.47\: m/s[/tex]

Explanation:

Tomando en cuanta que la definición de velocidad es:

[tex]v=\frac{\Delta x}{t}[/tex]

Donde:

La primera velodcidad esta dada por:

[tex]v_{1}=\frac{100}{10.56}[/tex]

[tex]v_{1}=9.47\: m/s[/tex]

La segunda velocidad sera:

[tex]v_{1}=\frac{200}{22.34}[/tex]

[tex]v_{1}=8.95\: m/s[/tex]

Por lo tanto, en el primer tramo fue más rápido.

Espero te haya ayudado!

the tendency of an object to resist a change in motion is called inertia