In projectile mtion, what is the x-component of the initial velocity? if V= Vi = 100 m/s and the angle with horizontal axis Θ = 60 degrees

These options are missing in the question

(a) Normal force

(b) Gravity force

(c) Applied force

(d) Friction force

(e) Tension force

(f) Air tension

Answer:

(b) Gravity force

(e) Tension force

(f) Air resistance

Explanation:

Normal force: NO, Normal force acts when body surfaces are in contact to push each other since lift is hanging and no surface contact is there so no Normal force.

Gravity force: YES. This force is acted on each and every body that lies in the vicinity of earth's gravitational field, as the life is hanging so it will experience Gravity force.

Applied force: NO.as there is no force given to the Elevator.

Friction force: NO. Friction fore occurs when bodies rub against each other or has a surface of contact, lift do not touch any surface hence no Frictional force.

Tension force: YES. The Elevator is hanging with the support of Four ropes and tension is acting in these ropes.

Air resistance: YES. The Elevator will experience Air resistance as it will move through the wide shaft.

Answer:

airestence?

Explanation:

Answer:

With??

Explanation:

Answer:

40watts

Explanation:

Given parameters:

Work done  = 3000J

Time  = 75s

Unknown:

Power generated  = ?

Solution:

Power is the rate at which work is done;

       Power = [tex]\frac{work done}{time}[/tex]

 Now, insert the parameters and solve;

     Power = [tex]\frac{3000}{75}[/tex]   = 40watts

Answer: Oxidation

Explanation:

Because it is :)

Answer:

A. Oxidation

Explanation:

IVLA - I just finished the test. Trust me.

Answer: Uniform Velocity-A body is said to have uniform velocity if it covers equal distance in equal intervals of time in a particular direction, however, the time intervals may be small. ... Examples of the body moving with variable velocity: 1.

Explanation:

Answer:

THANK YOUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU

Explanation:

I REALLY NEED THIS

Answer:

Oh my gosh yayyy one of the asnwers got deleted!!!! Yay thx for the points

Explanation:

Answer:

The maximum voltage that can be applied without damaging the resistor is 4.85 V

Explanation:

Electric Power in a Resistor

Given a resistor or resistance R connected to a circuit of voltage V carrying a current I. The relation between these three magnitudes is given by Ohm's Law:

V = R.I

The dissipated power P of a resistor can be calculated by the following equation, known as Joule's first law:

[tex]P = I^2.R[/tex]

Solving the first equation for I:

[tex]\displaystyle I=\frac{V}{R}[/tex]

Substituting in the second equation:

[tex]\displaystyle P=\frac{V^2}{R^2}.R[/tex]

Simplifying:

[tex]\displaystyle P=\frac{V^2}{R}[/tex]

Solving for V:

[tex]V=\sqrt{P.R}[/tex]

The resistor has a resistance of R=47Ω and can hold a maximum power of P=0.5 W, thus the maximum voltage is:

[tex]V=\sqrt{0.5\cdot 47}[/tex]

[tex]V=\sqrt{23.5}[/tex]

V = 4.85 V

The maximum voltage that can be applied without damaging the resistor is 4.85 V

Answer:

3.irregular, spiral, elliptical

Irregular, spiral and elliptical are the three types of galaxies present.

Types of galaxies:

Therefore, irregular, spiral, and elliptical are the three types of galaxies present.

Hence, option (3) is correct.

Learn more about the Galaxy here: https://brainly.com/question/15906708

#SPJ2

Answer:

9

Explanation:

the force is directly proportional to acceleration

F=ma

F1/a1=F2/a2

45/5=81/a2

81×5/45=9M/S²

Answer:

dx = - 0.0789[m]

Explanation:

In order to solve this problem, we must remember that the vertical component of a vector can be determined using the opposite catheter of the right triangle, by means of the sine function.

[tex]d_{x}=0.250*sin(18.4)\\d_{x} = 0.0789 [m][/tex]

Since the component is directed down, the sign is negative.

dx = - 0.0789[m]

Answer:

t = 7200.07seconds or 2 hours

Explanation:

given:

velocity (v) : 80km/h = 80 × 1000 m/ 60 × 60 s

= 80,000m/3600s => 22.222m/s

distance(d) = 160km => 160 × 1000 = 160,000m

time(t) = ?

since v=d/t

therefore, t= d/v

t= 160,000/22.222

t= 7,200.07seconds

or t= 7,200/3600 = 2 hours.

Answer:

because it would reduce the use of more electricity for same light output

Answer:

approx. 2.21

Explanation:

5.3/2.4 = 2.208

Answer:

Dalton's atomic theory proposed that all matter was composed of atoms, indivisible  and indestructible building blocks. while all atoms of an element were indentical  , different  element had atoms  of differing size and mass.

Explanation:

hope it's helpful

Answer:

Velocity = 20.18 m/s

Explanation:

Velocity can be defined as the rate of change in displacement (distance) with time. Velocity is a vector quantity and as such it has both magnitude and direction.

Mathematically, velocity is given by the equation;

[tex]Velocity = \frac{distance}{time}[/tex]

[tex]V = \frac{d}{t}[/tex]

Given the following data;

Distance, d = 3330m

Time, t = 165 secs

*To find the velocity*

Substituting into the equation, we have;

[tex]V = \frac{3330}{165}[/tex]

Velocity = 20.18 m/s

Answer:

C

Explanation:

Because it will be flying to the left

Answer:

D

Explanation:

because if the toy car flies off the string it would go in D's direction not C's

Answer:

W₁ = 8.12 N

Explanation:

Consider the weight supported by the person and friend to be:

W₁ = Weight supported by person

W₂ = Weight supported by Friend

Now, their sum must be equal to total weight of ladder. Hence,

W₁ + W₂ = 130 N

W₂ = 130 N - W₁   ---------------- equation (1)

Now, to carry the ladder, the moment due to both person's forces must be equal:

Moment due to person 1 = Moment due to friend

W₁ d₁ = W₂ d₂

where,

d₁ = distance between person and center of gravity = 1.5 m

d₂ =  distance between friend and center of gravity = 0.1 m

W₁(1.5 m) = W₂(0.1 m)

W₁ = W₂ (0.1 m/1.5 m)

W₁ = W₂(0.06667)

using equation (1):

W₁ = (130 N - W₁)(0.06667)

W₁ + 0.06667W₁ = 8.6667 N

W₁ = 8.12 N

Answer:

mutualism

Explanation:

Mutualism, a relationship in which both species benefit, is common in nature. In microbiology, there are many examples of mutualistic bacteria in the gut that aid digestion in both humans and animals.

Answer:

A) ΔP = 4.5 [kg*m/s]

B) F = 375 [N]

Explanation:

The linear momentum is defined as the product of the mass of a body by Velocity, therefore we must calculate the momentum for each case.

[tex]P = m*v[/tex]

where:

P = linear momentum [kg*m/s]

m = mass [kg]

v = velocity [m/s]

A)

When the soccer ball is rolling towards the player

[tex]P =0.25*6\\P = 1.5[kg*\frac{m}{s}][/tex]

After kicking the ball

[tex]P = 0.25*24\\P = 6 [kg*\frac{m}{s} ][/tex]

Therefore the change  momentum is equal to

ΔP = 6 - 1.5 = 4.5 [kg*m/s]

B) Momentum is defined as the force applied for a certain time, this momentum produces a linear momentum.

We must be especially careful in the directions of the movement, since depending on the direction a positive or negative sign must be included according to the established convention. In this particular case we are going to take the kick and the direction of this as positive, that is to say, the ball moves in the negative direction and after hitting the ball it moves in a positive direction.

[tex]-(m*v_{1}) + F*t = (m*v_{2})\\-(0.25*6) + (F*0.02) = (.25*24)\\F*0.02= (7.5)\\F = 375 [N][/tex]

Answer:

The heat causes the molecules on rubbing surfaces to move faster and have more energy.

Answer:

I think it is 50 j, I am not sure and also please let me know if I am wrong.

Answer: hey

Explanation:

Answer:

convection thermal energy causes ocean currents?

Answer:

i think it is 1,800

Explanation:

Answer:

Explanation:

Changing states of matter and energy

A block of ice is solid water. When heat (a form of energy) is added, the ice melts into liquid water. If heat is removed from water vapour, the gas cools down and it condenses back into liquid water. Continue to cool the water (by removing heat), and it becomes solid ice.

plz mark as brainliest

Answer:

water can be used as displacement to calculate the volume of a solid object.

Answer: If the object has an irregular shape , the volume can be measured using a displacement can . The displacement can is filled with water above a narrow spout and allowed to drain until the water is level with the spout. As the irregular object is lowered into the displacement can, the water level rises.

Explanation: google

Answer:

x = 302 m

Explanation:

Given that,

Speed of an airplane, v = 40 m/s

Height, h = 280 m

40 m/s is the horizontal velocity we should use to solve the given problem.

Let t is the time when the hay will reach the ground. It can be calculated using second equation of motion as follows :

[tex]h=ut+\dfrac{1}{2}at^2[/tex]

Here, u = 0 and a = g

[tex]h=\dfrac{1}{2}gt^2\\\\t=\sqrt{\dfrac{2h}{g}} \\\\t=\sqrt{\dfrac{2\times 280}{9.8}} \\\\=7.55\ s[/tex]

Let the horizontal distance is x. It can be calculated as :

x = vt

x = 40 m/s × (7.55 s)

x = 302 m

Hence, at a distance of 302 m she have to release the hay in order to hit the cow.

Answer:

B

Explanation:

A cupboard is placed in front of a heater. Air can move through a gap under the cupboard will cool towards the heater.

A heater is a device for supplying heat, for example a radiator or a convector. These water heaters heat water only when it is needed. Turn on the heater and the interior of the car will soon warm up. A heater is a device for supplying heat, for example a radiator or a convector.

A cupboard is placed in front of a heater. Air can move through a gap under the cupboard. The temperature, and the direction of movement, of the air in the gap under the cupboard will cool towards the heater.

A cupboard is placed in front of a heater. Air can move through a gap under the cupboard will cool towards the heater.

To learn more about heater refer to the link:

brainly.com/question/29547273

#SPJ6