Determine the initial velocity of a marble that lands 1.8m away from a tabletop that is 0.8m from the ground.
Acceleration due to gravity = 9.85
0 2.25 m/s
2.6 m/s
0 1.8 m/s
4.5 m/s

Answer:

vx = 65 yd/3 sec  = 21.7 yd/sec  since horizontal speed is constant

vy = g t = (32 / 3) yd/sec^2 * 1.5 sec = 16 yd/sec   where 32/3 is the acceleration due to gravity in yds / sec^2  and 1.5 is the time to travel each way in the vertical direction

V = (vx^2 + vy^2)^1/2 = (21.7^2 + 16^2)^1/2 = 27 yd/sec

tan theta = vy/vx = 16 / 21.7 = .737    theta = 36.4 deg

You can check using the range formula:

R = v^2 sin (2 theta) / g = 27^2 * .955 / (32 / 3) = 65.3 yds  

The difference from 65 yds may be rounding error.

Answer:

d

Explanation:

i am smart

Answer:

Earth is slightly closer to the Sun in December than it is in June. The force of gravity is slightly smaller

Explanation:

Answer:

sorry im not in physics

Explanation:

Answer:

27000 meters

Explanation:

15 x 60 x 30

Answer:

64m away if the horizontal speed does not change

Explanation:

Answer:

The initial energy emission occurs by 80% or more in the form of gamma rays but these are quickly absorbed and dispersed mostly by air in little more than a microsecond, converting gamma radiation into thermal radiation (thermal pulse ) and kinetic energy (shock wave) which are actually the two dominant effects in the initial moments of the explosion. The rest of the energy is released in the form of delayed radiation (fallout or fallout) and is not always counted when measuring the performance of the explosion.

Explanation:

High altitude explosions produce greater damage and extreme radiation flux due to lower air density (photons encounter less opposition) and consequently a higher blast wave is generated.

Answer: False

Explanation:

Hi, I hope this helps!

During cellular respiration, glucose reacts with oxygen to produce carbon dioxide, water and energy.

Answer: False

Explanation:

Answer:

C.fossil fuels are the remnants of organisms that lived a long time and were buried,heated and formed into hydrocarbons

Answer:

i think the answer is 50 kW.h

Answer:

[tex]q_1=\pm0.03 \mu C[/tex] and [tex]q_2=\pm0.02 \mu C.[/tex]

Explanation:

According to Coulomb's law, the magnitude of  force between two point object having change [tex]q_1[/tex] and [tex]q_2[/tex] and by a dicstanced is

[tex]F_c=\frac{1}{4\pi\spsilon_0}\frac{q_1q_2}{d^2}-\;\cdots(i)[/tex]

Where, [tex]\epsilon_0[/tex] is the permitivity of free space and

[tex]\frac{1}{4\pi\spsilon_0}=9\times10^9[/tex] in SI unit.

Before  dcollision:

Charges on both the sphere are [tex]q_1[/tex] and [tex]q_2[/tex], d=20cm=0.2m, and [tex]F_c=1.35\times10^{-4}[/tex] N

So, from equation (i)

[tex]1.35\times10^{-4}=9\times10^9\frac{q_1q_2}{(0.2)^2}[/tex]

[tex]\Rightarrow q_1q_2=6\times10^{-16}\;\cdots(ii)[/tex]

After dcollision: Each ephere have same charge, as at the time of collision there was contach and due to this charge get redistributed which made the charge density equal for both the sphere t. So, both have equal amount of charhe as both are identical.

Charges on both the sphere are mean of total charge, i.e

[tex]\frac{q_1+q_2}{2}[/tex]

d=20cm=0.2m, and [tex]F_c=1.406\times10^{-4}[/tex] N

So, from equation (i)

[tex]1.406\times10^{-4}=9\times10^9\frac{\left(\frac{q_1+q_2}{2}\right)^2}{(0.2)^2}[/tex]

[tex]\Rightarrow (q_1+q_2)^2=2.50\times10^{-15}[/tex]

[tex]\Rightarrow q_1+q_2=\pm5\times 10^{-8}[/tex]

As given that the force is repulsive, so both the sphere have the same nature of charge, either positive or negative, so, here take the magnitude of the charge.

[tex]\Rightarrow q_1+q_2=5\times 10^{-8}\;\cdots(iii)[/tex]

[tex]\Rightarrow q_1=5\times 10^{-8}-q_2[/tex]

The equation (ii) become:

[tex](5\times 10^{-8}-q_2)q_2=6\times10^{-16}[/tex]

[tex]\Rightarrow -(q_2)^2+5\times 10^{-8}q_2-6\times10^{-16}=0[/tex]

[tex]\Rightarrow q_2=3\times10^{-8}, 2\times10^{-8}[/tex]

From equation (iii)

[tex]q_1=2\times10^{-8}, 3\times10^{-8}[/tex]

So, the magnitude of initial charges on both the sphere are [tex]3\times10^{-8}[/tex] Coulombs[tex]=0.03 \mu C[/tex] and [tex]2\times10^{-8}[/tex] Colombs or [tex]0.02 \mu C[/tex].

Considerion the nature of charges too,

[tex]q_1=\pm0.03 \mu C[/tex] and [tex]q_2=\pm0.02 \mu C.[/tex]

Answer:

See attached answer.

Explanation:

To solve this we must be knowing each and every concept related to displacement and its calculations. Therefore, the ride's displacement from time t = 0 s to time t = 16 s is 16v.

The distance along a straight line connecting an object's original and final positions is its displacement [x].

Displacements are not always a good thing. It may also be 0 or negative. A negative displacement indicates that the item has moved away from the origin and toward the right if a positive direction is situated to the right of both the origin.

If the body's velocity at a given moment in time is 'v' m/s, then displacement may be expressed mathematically as-

v = dx /dt

dx = vdt

Integrating on both sides, we get

∫dx = ∫vdt

∫dx  [x = 0 to x = x] = ∫vdt  [ t = 0 to t = 16 s]

x = v [16 - 0]

x = 16v

Therefore, the ride's displacement from time t = 0 s to time t = 16 s is 16v.

To learn more about displacement, here:

https://brainly.com/question/14571339

#SPJ2

Given : A toy plane has a mass of 1.5kg . It is flying in air at a speed of 8m/s .

To Find : The Kinetic energy of the plane .

Solution : The mass of the toy plane is 1.5kg and Velocity is 8.0 m / s . So we know the formula to find the kinetic energy as ,

[tex]\boxed{\red{\bf Energy_{Kinetic}=\dfrac{1}{2}mv^2}}[/tex]

On substituting the respective values,

⇒ KE = ½mv².

⇒ KE = ½ × 1.5 kg × (8 m/s)².

⇒ KE = ½ × 1.5 kg × 64m²/s² .

⇒ KE = 48 J .

Hence the Kinetic energy of the plane is 48Joules.

The kinetic energy of a plane having a mass of 1.5 kg flying in the air at 8.0 m / s is 48 J.

Kinetic energy is a type of power that a moving object or particle possesses. When an object undergoes work, which involves the transfer of energy, by exerting a net force, the object accelerates and consequently obtains kinetic energy.

A moving object or particle has kinetic energy, which depends on both its mass and its rate of motion. The type of motion can be vibration, rotation on an axis, translation (or travel along a path from one place to another), or any combination of these.

Given:

The mass of the toy plane, m = 1.5 kg,

The velocity of the toy plane, v = 8 m / s,

Calculate the kinetic energy by the formula given below,

[tex]KE = 1/2mv^2[/tex]

Substitute the values,

KE = 1 / 2 × 1.5 × 8²

KE = 1 / 2 × 1.5 × 64

KE = 48 J

Therefore, the kinetic energy of a plane having a mass of 1.5 kg flying in the air at 8.0 m / s is 48 J.

To know more about Kinetic energy:

https://brainly.com/question/999862

#SPJ2

Answer:

The nucleus has an overall positive charge as it contains the protons. Every atom has no overall charge (neutral). This is because they contain equal numbers of positive protons and negative electrons. These opposite charges cancel each other out making the atom neutral.

Explanation:

thank you for the free points

Answer:

love

Explanation:

Answer:

I am not very sure of the first question

The second one which is why it discarted it is that because someone named Friedrich Wohler showed that it was possible to obtain an organic compound in the laboratory.

Answer:

He was scared

Explanation:

Answer:

He Feared persecution .

Explanation:

the answer is B your welcome

The  true statement about a series circuit is: the current flow through every part of the circuit is the same. Hence, option (B) is correct.

Electrical networks and two-terminal components can be linked either serially or parallelly. The electrical network that results will have two terminals and be capable of operating in either a series or parallel topology.

It depends on your point of view whether a two-terminal "thing" is an electrical network (like resistors connected in series) or an electrical component (like a resistor). In this article, a two-terminal "thing" that participates in series/parallel networks will be referred to as a "component."

Each component connected in series travels the same "electrical path" and carries the same amount of current—equal to the network's current—through it.

Learn more about series circuit here:

https://brainly.com/question/14997346

#SPJ2

Answer:

The current through all of the resistors will add up to 10 A.

Explanation:

Answer: D. the Schachter-Singer theory

Explanation:

The Schachter-Singer theory which is also called the Two-factor theory of emotion, explains that humans feel emotion after they appraise the changes in their body in reaction to a stimuli as this would then give them a better means to tell which emotion they are feeling.

Lynette in the first instance noticed she had a racing heart and rapid breathing in response to watching two other players and was then able to appraise this and attribute it to excitement.

When the same thing occurs again but under different circumstances, she is able to appraise it differently and attribute it to nervousness which shows that the Schachter-Singer theory is the relevant theory.

Answer:

Explanation:

An x-ray emits radiation to see through the outer part of your body.

Hope this helps! <3

An X-ray is a type of radiation which is a type of electromagnetic radiation in the electromagnetic spectrum.

The  electromagnetic spectrum consists of electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.

The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.

In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.There are 7 types of electromagnetic radiation in the electromagnetic spectrum.Gamma rays have the highest energy while radio waves have least energy.

Learn more about electromagnetic spectrum,here:

https://brainly.com/question/15576247

#SPJ2

C (Celsius) is the correct symbol for the metric (SI) unit of temperature. The correct option is D.

The Celsius scale is widely used for measuring temperature in the metric system.

In certain scientific and engineering fields, such as thermodynamics, the Kelvin scale (symbol: K) is also used as an absolute temperature scale but the SI unit of temperature is Celsius.

Thus, the correct option is D.

To know more about the International System of Units, click here:

https://brainly.com/question/30404877

#SPJ6

Answer:

Total distance traveled by bird is 10.5 km.

Explanation:

Given that,

Velocity of runner= 8.4 km/hr

Distance = 6.3 km

Velocity of bird = 42 km/hr

Suppose, How far does the bird travel?

We need to calculate the time of bird

Using formula of time

[tex]t=\dfrac{d}{v_{b}}[/tex]

Put the value into the formula

[tex]t=\dfrac{6.3}{42}[/tex]

[tex]t=0.15\ hr[/tex]

We need to calculate the distance runner travels during time period

Using formula of distance

[tex]d=v_{r}\times t[/tex]

[tex]d=8.4\times0.15[/tex]

[tex]d=1.26\ km[/tex]

We need to calculate the distance of runner to FL

Using distance

[tex]d'=6.3-1.26[/tex]

[tex]d'=5.04\ km[/tex]

We need to calculate the net closing speed between runner and bird

Using speed

[tex]v'=v_{r}+v_{b}[/tex]

[tex]v'=8.4+42[/tex]

[tex]v'=50.4\ km/hr[/tex]

We need to calculate the time for runner and bird to meet

Using formula of time

[tex]t=\dfrac{d}{v'}[/tex]

Put the value into the formula

[tex]t=\dfrac{5.04}{50.4}[/tex]

[tex]t=0.1\ hr[/tex]

We need to calculate the distance covered by runner

Using formula of distance

[tex]d=vt[/tex]

Put the value into the formula

[tex]d=8.4\times0.1[/tex]

[tex]d=0.84\ km[/tex]

We need to calculate the distance covered by bird to runner

Using formula of distance

[tex]d=vt[/tex]

Put the value into the formula

[tex]d=42\times0.1[/tex]

[tex]d=4.2\ km[/tex]

We need to calculate the total distance

Using distance

[tex]D=6.3+4.2[/tex]

[tex]D=10.5\ km[/tex]  

Hence, Total distance traveled by bird is 10.5 km.

It's Action and Reaction

Answer:

0.36 kgm/s

Explanation:

Formula for momentum is :

P=mv

p is momentum

m is mass = 30g = 0.03kg

v is velocity = 12 m/s

P= 0.03 x 12

P = 0.36 kgm/s