Billie travels 3.2 km due east in 0.1 hr, then 3.2 km at 15.0 degrees eastward of due north in 0.21 hr, and finally another 3.2 km due east in 0.1 hr. What is the magnitude of his average velocity for the entire trip?

If the Hubble Space Telescope has a resolution of about 0.05, then the size of the smallest feature it can distinguish on the surface of Mercury, at closest approach to Earth is 92 m.

What is the earth?

The Earth is described as an ellipsoid with a circumference of about 40,000 km. The earth found is the densest planet in the Solar System and it is also the largest of the four rocky planets.

The Hubble Space Telescope is a space telescope that was launched into low Earth orbit in 1990 and remains in operation. It was not the first space telescope, but it is one of the largest and most versatile, renowned both as a vital research tool and as a public relations boon for astronomy.

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Answer:

1.8 m / s^2

Explanation:

F = ma       ( ignoring friction)

F/ m = a

9.7 / 5.5 = 1.8 m/s^2

Answer:

Like trees, houses, and people, anything outside is at risk of being struck by lightning when thunderstorms are in the area, including cars. The good news though is that the outer metal shell of hard-topped metal vehicles does provide protection to those inside a vehicle with the windows closed.

Answer: Depends

Explanation:

You should be good if you have proper shelter and protection to maintain safety.

If it's hail, it's probably best to find shelter and I recommend putting a thick blanket on the windows so they don't burst.

Weight is the gravitational force with which the earth pulls an object towards it whereas, Mass is a quantity representing the amount of matter in a particle or object.

hope this helps and you need a chair for sitting xD -,-

Given data

*Alec is rising towards the surface of the water is u = 6.0 m/min

*The given distance is d = 8.4 m

The formula for the time taken by the Alec to rise is given as

Substitute the values in the above expression as

Hence, the time is taken by Alec to rise is t = 1.4 minutes

Cindy's average speed for the entire run is 200 m per min.

What is Cindy's average speed for the entire run?

First, to measure Cindy's average speed, we need to know that the average speed of Cindy would be the total distance she had covered while running by the total amount of time it took her to cover the distance. So, we need to measure her average rate of speed over the extent of her runs.

In order to calculate average speed we will calculate the total distance in meters traveled by Cindy.

Given:

Total distance = 2 Km

Convert km to meter, since she is running at a different speed measured in meter.

1 km = 1,000 m

Total distance = 2 Km = 2000 m

Then, the total amount of time in minutes it took her to cover this distance is: 2 (for the first 250 m) + 4 (for the next 1,000 m) + 1 (next 350 m) + 3 (time used for rest) = 10 minutes

Average speed = total distance  / total time

Average speed = 2000 m / 10 minutes

Therefore, her average speed  = 200 m per min

In summary, Cindy, though rested for 3 minutes, maintained an average speed of about 200 m per min for the entire run.

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The force that was needed to stop the bus of mass 5000 kg that stops after 25 m in 5 s is 5000 N.

a = v / t

v = d / t

a = Acceleration

v = Velocity

d = Distance

t = Time

d = 25 m

t = 5 s

v = 25 / 5

v = 5 m / s

a = 5 / 5

a = 1 m / s²

According to Newton's second law of motion,

F = m a

F = Force

m = Mass

m = 5000 kg

F = 5000 * 1

F = 5000 N

The given question is incomplete. The complete question is:

A bus of mass 5000 kg applies brake and stops after 5 seconds and the bus stops at distance of 25 meters, calculate the force that was needed to stop the bus in N

Therefore, the force that was needed to stop the bus is 5000 N

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Acceleration of the rabbit, moving in the positive x-direction at 1.50 m/s when it spots a predator and accelerates to a velocity of 12.1 m/s along the positive y-axis, all in 2.20 s is given by in x direction 0 m/sec² in y direction is 5.50 m/sec².

The rate at which the speed and direction of a moving object vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates. Even if the speed is constant, motion on a circle accelerates because the direction is always shifting.

Given in the question rabbit is initially moving with speed 1.50 m/sec in x direction after rabbit spot predator start accelerating in y direction to velocity 12.1 m/sec in 2.20 m. so acceleration in x direction will be zero.

Acceleration in y direction is 5.50 m/sec².

Acceleration in x direction will be zero.

Acceleration in y direction is 5.50 m/sec².

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This answer which is currently written is not complete because solving a vector problem, we should also mention the direction correctly, but here the direction is not mentioned.

A vector is a quantity or phenomenon that has two impartial houses, value and course. The term also denotes the mathematical or geometrical illustration of the sort of quantity. Examples of vectors in nature are pace, momentum, pressure, electromagnetic fields, and weight. A vector may be located in a square coordinate device, as illustrated here. The square coordinate notation for this vector.

vector, in physics, is a quantity that has each importance and course. it's far usually represented via an arrow whose direction is similar to that of the amount and whose period is proportional to the quantity's magnitude. although a vector has magnitude and direction, it does not have a function.

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Rusting is referred to as a example of oxidation reaction in this type of context.

This is a type of chemical change which involves the loss of electrons and contact with oxygen molecules. When this occurs, the element becomes oxidized  with the symbol O which is being used to denote it. The main factor which is considered about the oxidation process is the availability of oxygen.

Rusting on the other hand is referred to as iron oxide which occurs during the reaction between iron and oxygen and the color changes into reddish brown which signifies this process.

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(D) The electric potential at the point P is +1.6 kQ/R.

The electric potential of a given charged body is the work done in bringing the charge from a point to a given location in the electric field.

Mathematically, electric potential is given as;

V = kq/r

where;

The distance of each of the negative charge to point P is calculated as follows;

r = √(R² + R²)

r = √(2R²)

r = R√2

The electric potential from each negative charge to point P;

V = -kQ/(R√2)

For the two charges = - 2kQ/(R√2)

The electric potential from 3Q

V = (k3Q) / R

V = (3kQ)/R

The total electric potential;

V(net) =  (3kQ)/R - 2kQ/(R√2)

V(net) =  (3kQ)/R - (1.414kQ)/R

V(net) = +1.6 kQ/R

Thus, we can conclude that the sum of the sum of the electric potential at point must be positive since it is directed to the positive y-direction.

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The coefficient of linear expansion, given that the length of the pipe increased by 1.5 cm is 1.67×10¯⁵ /°F

From the question given above, the following data were obtained

The coefficient of linear expansion can be obtained as illustrated below:

α = ∆L / L₁∆T

α = 0.015 / (10 × 90)

α = 0.015 / 900

α = 1.67×10¯⁵ /°F

Thus, we can conclude that the coefficient of linear expansion is 1.67×10¯⁵ /°F

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The Direction of the vector sum of the two vectors V and W is resulted as 240.84 m toward + x.

A vector is a quantity or phenomenon with independent components of magnitude and direction. The expression can also be used to describe a quantity's geometric or mathematical representation.

The following are the x and y axes for the supplied vector:

Vector V in x direction;

[tex]$$\begin{aligned}&\mathrm{V}_{\mathrm{x}}=\mathrm{V} \cos \theta \\&\mathrm{V}_{\mathrm{x}}=448 \cos \left(224^0\right) \\&\mathrm{Vx}=-322.26\end{aligned}[/tex]

Vector V in y direction;

[tex]\begin{aligned}&V_y=V \sin \theta \\&V_y=448 \times \sin 224^0 \\&V_y=-311.2\end{aligned}[/tex]

Vector W in x direction;

[tex]W_x = 336 \times cos(74.9^0)[/tex]

[tex]W_x = 81.86[/tex]

Vector W in y direction;

[tex]\begin{aligned}&\mathrm{W}_{\mathrm{y}}=336 \times \sin 75.9 \\&\mathrm{W}_{\mathrm{y}}=325.88\end{aligned}[/tex]

The resultant vector in the x direction is;

[tex]\begin{aligned}&\Sigma X=-322.26+81.86 \\&\Sigma X==-240.4\end{aligned}[/tex]

The resultant vector in the y direction is;

[tex]\begin{aligned}&\Sigma Y=-311.2+325.88 \\&\Sigma Y=14.68\end{aligned}[/tex]

The resultant vector is found as;

[tex]\begin{aligned}&\mathrm{R}=\sqrt{(-240.4)^2+(14.68)^2} \\&\mathrm{R}=240.84 \mathrm{~m}\end{aligned}[/tex]

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According to the given statement the charge Q is 6 coulomb that requires of energy to be moved through a potential difference .

Note that whenever a voltage is stated, it refers to the difference in potential between two places. Every battery, for instance, has two terminals, and its voltage seems to be the difference in potential between them.

The voltmeter is a tool used to measure potential difference. Some varieties, like voltmeters, feature a pointer on a dial, but digital displays are more common. To detect the potential difference across a circuit element, you must connect a voltmeter in parallel, unlike an ammeter.

W is work done

V is potential difference

Work done

W = 96J

V = 16

W=Q×V

Q=W÷V

Q =  96 ÷ 16

Q =  6 Coulomb.

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Answer:A

Explanation: i think

Answer:

the ball being pulled toward the ground

Explanation:

The output voltage of a step-up transformer is 2550volts.

A transformer is an electrical energy transfer device that steps up or steps down the voltage from one alternating-current circuit to one or more other circuits.

We are given that,

The primary voltage of a transformer = V₁ = 170V

The number of turns of coils of primary transformer = N₁ = 10turns

The number of turns of coils of secondary  transformer = N₂ = 150 turns

Thus , to get the output voltage V₂ of  a step-up transformer, we can use the formula,

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

Where, V₁ is primary voltage of a transformer , V₂ is the output voltage (secondary) of a transformer , N₁ & N₂ are the number of turns of  coils primary and secondary transformer.

Therefore , after putting the values in above equation we can get,

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

[tex]V_{2} =[/tex] [tex]\frac{150}{10} 170volts[/tex]

[tex]V_{2} =[/tex] [tex]2550 volts[/tex]

Therefore, the output voltage of the step-up transformer would be 2550 volts.

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The additional information needed to calculate the acceleration of the motorcycle is the time taken to complete the distance.

Acceleration is the amount by which a speed or velocity increases (and so a scalar quantity or a vector quantity).

The acceleration of a moving body can be calculated by dividing the change in velocity of the motion (∆V) by the time taken to complete the motion as follows:

Acceleration (m/s²) = change in velocity (m/s)/time(s)

According to this question, a motorcyclist is traveling in the positive direction at a velocity of 7.0 meters per second. She then increases her velocity to 9.0 meters per second. This means that the change in velocity {∆V} is 2m/s.

However, the time taken to complete the distance is still required to compute the acceleration of the motorcycle.

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The average acceleration during the time interval t=0 to t=10s is 1.67 m/s².

The average acceleration of an object is the rate of change of velocity of an object with time.

Mathematically, the average acceleration of an object is given as;

a = Δv/Δt

a = (v₂ - v₁)/(t₂ - t₁)

where;

From the graph,

the initial velocity at time of 0 second = 0 km/h

the final velocity at time of 10 seconds = 60 km/h = 16.67 m/s

the initial time = 0 s

the final time = 10 s

The average acceleration of the car is calculated as follows;

a = (16.67 m/s - 0 m/s) / (10 s - 0 s)

a = 1.67 m/s²

Thus, the average acceleration of the car increases with increase in the rate of change of displacement with time.

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Answer: The direction of the resultant can be determined by finding the angle that the resultant makes with either the north-south or the east-west vector. The diagram at the right shows the angle theta (Θ) marked inside the vector addition triangle. This angle theta is the angle that the resultant makes with west.

Explanation: Hope this helps.

Answer:

Magnitude=25.5    

Direction=-60.4

Explanation:

[tex]\sqr\sqrt{ x^{2} +y^{2} \\\\[/tex]=m

[tex]Tan^{-1} (y/x)[/tex] = D

The force applied to the ball from bat if the ball is in contact with the ball for only 0.0007 s is 34.29 KN

J = F * t

J = Impulse

F = Force

t = Time

J = 24 N s

t = 0.0007 s

F = J / t

F = 24 / 0.0007

F = 34.29 KN

Impulse is the rate of change of momentum in an object. It can simply be defined as force acting on an object over a period of time to change the object's momentum. So,

J = Δp = F Δt

Therefore, the force applied to the ball from bat is 34.29 KN

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The temperature change in the lead immediately   ∆T=1.56 K.

Temperature is a physical amount that expresses the hotness of a count number or radiation. There are 3 sorts of the temperature scale.

Temperature is a measure of the common kinetic power of the particles in an item. when the temperature will increase, the motion of the debris also increases. Temperature is measured with a thermometer or a calorimeter.

Temperature is a degree of the common kinetic strength of the particles of a substance. The higher the temperature of an item, the better its kinetic strength. Kinetic electricity is a form of electricity related to movement.

a.  ΔQ=mgh

ΔQ=0.5×9.80×20

ΔQ=98 J.

⇒∆U= ∆Q

⇒∆W=0

d. The temperature change is ∆T=1.56 K

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Be [purple], Ca [black] and Sr [blue] are the elements in order of increasing size.

Brittle is not the property of metals.

The strong electrostatic force of attraction that is present in metal ions when they are surrounded by a large number of electrons. It is actually very strong and flexible at the same time. So, when we apply a force on the metals, they can be transformed into flat and smooth sheets that can be drawn into wires and they are hard to break into pieces.

Beryllium is an element that is present in the second period while on the other hand, calcium element is present in the next period and Sr element is also present in the lower period of periodic table. We know that when we move down the group, the number of shells increases which ultimately leads to increase in atomic size.

So we can conclude that the elements in order of increasing size are Be [purple], Ca [black] and Sr [blue]. The property which is not present in metals is the property of metals.

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Answer: False

Explanation: the equator receives the most sun light because the the equator is closest to the sun.

Answer:

m V^2 / R = G M m / R^2

M = R V^2 / G            balancing forces

V = 2 pi R / T         speed of craft

M = 4 pi^2 R^3 / (G * T^2)       substituting for V

M = 4 pi^2 * 52E21 / (6.67E-11 * 1.30E7) = 39.5 * 52 / (6.67 * 1.3) * 10^25 kg

M = 2.37E27 kg

note mass of earth = 5.98E24 kg - should check mass obtained

Answer:

[tex] \small \fbox{\sf Option C, D and E are the correct answer.}[/tex]

Explanation:

The gravitational force of attraction between any two masses is given by the formula,

[tex]F = G \frac{m_1 \cdot m_2}{r^2}[/tex]

Where,

From above relation we can conclude that,

Hence, the greatest amount of gravitational force between a planet and it's moon would be largest when,

Option C, D and E are the correct answer.

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