what is damping??????​

Answer:

4kg

Explanation:

Given parameters:

Kinetic energy  = 1.6J

Velocity  = 0.2m/s

Unknown:

Mass of the body = ?

Solution:

The kinetic energy of a body is the energy due to the motion of the body.

It is mathematically expressed as;

  Kinetic energy = [tex]\frac{1}{2}[/tex]  m v²

m is the mass

v is the velocity

          1.6  =  [tex]\frac{1}{2}[/tex]  x 0.2 x v²  

          1.6  = 0.1v²

         v²   = 16

          v  = 4kg

Answer:

An electric bell is placed inside a transparent glass jar. The bell can be turned on and off using a switch on the outside of the jar. A vacuum is created inside the jar by sucking out the air. Then the bell is rung using the switch. What will we see and hear?

A.

We’ll see the bell move, but we won’t hear it ring.

B.

We won’t see the bell move, but we’ll hear it ring.

C.

We’ll see the bell move and hear it ring.

D.

We won’t see the bell move or hear it ring.

E.

We’ll see the sound waves exit the vacuum pump.

Explanation:

so, the answer to the question is

A.

We'll see the bell move, but we won’t hear it ring.

Answer:

A.

We’ll see the bell move, but we won’t hear it ring.

Explanation:

Sound waves need a medium to travel and cannot travel in vaccuum

Answer:

You don't need to worry about this solar death anytime soon, though. Inside the sun, a churning fusion engine fuels the star, and it still has a lot of fuel left — about 5 billion years' worth.

Astronomers estimate that the sun has about 7 billion to 8 billion years left before it sputters out and dies. Humanity may be long gone by then, or perhaps we'll have already colonized another planet. Additional resources: Find out what will happen to the Earth when the sun dies, from Live Science.

The studies suggest that the solar system’s planets will continue to orbit the Sun stably for at least 40 million years. But after that, they show there is a small but not insignificant chance that things could go terribly awry.

In one of Batygin and Laughlin’s simulations, Mercury was thrown into the Sun 1.3 billion years from now. In another, Mars was flung out of the solar system after 820 million years, then 40 million years later Mercury and Venus collided.

Explanation:

Answer:. 4+5+34+34+44+53 equals174 divide by 6 equals 29 hope this helps ®:]©™

Explanation:

Answer:

c. Only electromagnetic waves travel  through space

Explanation:

Electromagnetic waves are the only waves that travels through space or vacuum.

These waves do not require any material medium for their propagation as the case may be.

Answer:

A

Explanation:

Answer:

A.

Explanation:

Answer:

It wouldn't do this because the gravity of Jupiter is 2 and ½ times more powerful than here on Earth.

Explanation:

Brainliest?

No change in the results of Galileo’s experiment happens on adding a “JUPITER MODE” to the virtual activity .

The gravitational pull of Jupiter is greater than the gravitational pull of Earth.  But these pulls are same for all masses. So, again all bodies of any mass will fall simultaneously and at the same moment. Hence, no change in the results of Galileo’s experiment happens.

Learn more about gravity here:

https://brainly.com/question/4014727

#SPJ2

Answer:

The car moving with speed 50 mph

Explanation:

We are given that

Distance, s=280 feet=85.3 m

1 feet=0.3048 m

Coefficient of kinetic friction=[tex]\mu_s=0.3[/tex]

1 m/s=2.237 mph

We have to find the speed of car moving.

Speed, v=[tex]\sqrt{2\mu_s gs}[/tex]

Where [tex]g=9.8ms^{-2}[/tex]

Using the formula

Speed of the car,v=[tex]\sqrt{2\times 0.3\times 9.8\times 85.3}[/tex]

Speed of the car,v=22.4 m/s

Speed of the car, v=[tex]22.4\times 2.237\approx 50 mph[/tex]

Hence, the car moving with speed 50 mph

Option  d is true.

Answer:

7.2 x 10⁻⁶N

Explanation:

Given parameters:

Mass of Venus  = 4.87 x 10²⁴kg

Radius  = 6.05 x 10⁶km = 6.05 x 10⁹m

Mass of person  = 81kg

Unknown:

Gravitational force  = ?

Solution:

To solve this problem, we use the Newtons law of universal gravitation:

  Fg  = [tex]\frac{G x mass of venus x mass of person}{radius^{2} }[/tex]  

G is the universal gravitation constant  = 6.67 x 10⁻¹¹

 Fg  = [tex]\frac{6.67 x 10^{-11} x 4.87 x 10^{22} x 81 }{(6.05 x 10^9)^{2} } }[/tex]

 Fg  =  7.2 x 10⁻⁶N

Answer:

Vx = V0 cos 60 = V0 ./ 2        horizontal speed

Vy = V0 sin 69 = V0 * .866 = .866 V0   vertical speed

t = 107 / Vx = 214 / V0   time to travel 107 m

h = Vy t - 1/2 * g t*2   time to fall 1.7 m

-1.7 = .866 V0 * 214 / V0 - 4.9 * (214 / V0)^2           substituting

224400 / V0^2 = 187

V0 = (224400 / 187)^1/2 = 2=34.64 m/s

t = 214 / 34.64 = 6.178 stc

Check:    h = Vy t - 1/2 g t^2

-1.7 = .866 * 34.64 * 6.178 - 4.9 * 6.178^2

-1.7  = -1.69

Answer:

The sound goes in every direction, except into the two objects that make contact.

Explanation:

The waves need somewhere to go, but can't travel into the two objects that were struck, so therefore the sound explodes forth in every which way and ends up in your ear.

At the time when the object should be struck and the sound should be generated so here the direction should be at each and every direction but does not make any contact.

It is the wave that develop the disturbance pattern which leads into the energy movement that should be traveled via the medium like the air, water, etc. Also, it leads to the vibration like when the phone is ringed or the vocal cords of the person.

hence, At the time when the object should be struck and the sound should be generated so here the direction should be at each and every direction but does not make any contact.

Learn more about waves here: https://brainly.com/question/21849636

Answer:

I think its A

Explanation:

Answer:

The input power is 200 W

Explanation:

Motor Efficiency

The efficiency of a motor can be calculated as follows:

[tex]\displaystyle \beta=\frac{P_o}{P_i}[/tex]

Where:

β   = efficiency

Po = Output power

Pi  = Input power

Solving for Pi:

[tex]\displaystyle P_i=\frac{P_o}{\beta}[/tex]

The efficiency is β=0.75 and the output power is Po=150 W, thus the input power is:

[tex]\displaystyle P_i=\frac{150}{0.75}[/tex]

[tex]P_i=200 \ W[/tex]

The input power is 200 W

Answer:

$ 1.1

Explanation:

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

Cost per kWh = $ 0.1

Current (I) = 10 A

Voltage (V) = 220 V

Time (t) = 5 h

Cost of operation =?

Next, we shall determine the power the electric oven. This can be obtained as follow:

Current (I) = 10 A

Voltage = 220 V

Power (P) =?

P = IV

P = 10 × 220

P = 2200 W

Next, we shall convert 2200 W to KW. This can be obtained as follow:

1000 W = 1 KW

Therefore,

2200 W = 2200 W × 1 KW / 1000 W

2200 W = 2.2 KW

Thus, 2200 W is equivalent to 2.2 KW.

Next, we shall determine the energy consumed by the electric oven. This can be obtained as follow:

Power (P) = 2.2 KW

Time (t) = 5 h

Energy (E) =?

E = Pt

E = 2.2 × 5

E = 11 KWh

Finally, we shall determine the cost of operation. This can be obtained as follow:

1 KWh cost $ 0.1

Therefore,

11 KWh will cost = 11 × 0.1

11 KWh will cost = $ 1.1

Therefore, the cost of operating the electric oven is $ 1.1

Answer:

Explanation:

hope it is correct

it is. 55.556 metres per second

Answer:

No work is done since no distance is given

Explanation:

Since no distance is given, the force is not doing any work

No work is done by the man since we do not know the distance or displacement.

Work is only said to be done when the force applied on an object moves it through a particular distance.

Work done  = Force x distance.

Since no distance is given in this problem, we can as well assume that the force applied is doing no work on the object.

Answer:

DP = 56 [kg*m/s]

Explanation:

We know that momentum is defined by the product of mass by Velocity. In this way by means of the following equation, we can calculate the impulse.

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

where:

P = momentum [kg*m/s]

m = mass [kg]

v = velocity [m/s]

Now replacing:

[tex]P=8*9\\P=72[kg*m/s][/tex]

And after the ball hits the wall:

[tex]P_{2}=8*2\\P_{2}=16[kg*m/s][/tex]

The change in momentum is equal to:

[tex]DP=72-16\\DP = 56 [kg*m/s][/tex]

Explanation:

Photovoltaic energy is a clean, renewable source of energy that uses solar radiation to produce electricity. It is based on the photoelectric effect—the emission of electrons when electromagnetic radiation (i.e. light) hits a material.

Answer:

electromagnetic waves strike a semiconductor , removing some of the electrons ,which form a current

Explanation:

aPe~X!

Answer:C.3

Explanation:

Answer:

The force of gravitational will decreases by a factor of 4

Explanation:

The given parameters are;

The symbol that represents the given mass = m

The mass of the circular ring = M

The initial distance of the mass "m" located at the point P from the center O = h

The final distance of the mass "m" when moved further away from point O = 2·h

Given that h = r, we have;

[tex]The \ initial \ gravitational \ force, F_1 =G \cdot \dfrac{M \cdot m}{r^{2}}[/tex]

Therefore, when OP = 2·h, we have;

OP = 2·r and the new gravitational force, F₂, is given as follows;

[tex]F_2 =G \cdot \dfrac{M \cdot m}{(2\cdot r)^{2}} = G \cdot \dfrac{M \cdot m}{4\cdot r^{2}} = \dfrac{1}{4} \times G \cdot \dfrac{M \cdot m}{r^2} = \dfrac{1}{4} \times F_1[/tex]

[tex]\therefore F_2 = \dfrac{1}{4} \times F_1[/tex]

Therefore, when the mass, m, is removed such that OP = 2h, the value of the gravitational force decreases by a factor of 4.

Answer:

That's why if you lean against the wall, you don't just fall through it. The wall pushes back on you as hard as you push on it, and you and the wall stay in place. If you throw something, you put more force behind it than just leaning on it, so it pushes back with more force.

Explanation:

PLEASE MARK ME AS BRAINLIEST

Answer:

meters per second squared or meters per second per second

Explanation:

If speed is measured in meters per second and time is measured in second, the unit of acceleration is "meters per second squared or meters per second per second."

To illustrate better, speed is measured in meters per second = m/s, while time is measured in second = s.

Hence, the unit of acceleration is m/s². This implies that acceleration is the number of meters per second the velocity changes every second.

Answer:

yes its 25cmjdj8dnen8dnejdid

Answer:

A new substance was formed

Explanation:

According to this question, a shiny and flexible metal called Magnesium (Mg) is burnt in air to produce a white powder that has no shiny or flexible properties, however, has more weight than the magnesium metal itself.

This is possible because a CHEMICAL CHANGE has occured, hence, a new substance has been formed. The formation of a new substance during the burning process (chemical reaction), induced the increase in mass.

Answer:

200N

Explanation:

Distance from fulcrum by you  = 0.5m

Distance from fulcrum by cousin  = 1.5m

Your weight  = 600N

Unknown:

Weight of my cousin = ?

Solution:

From the principle of moment, when an object is balanced, the sum of the clockwise moment is equal to the sum of the anti-clockwise moment.

So;

   Your weight x distance from fulcrum by you  = Weight of cousin x her distance from the fulcrum

   600 x 0.5  = weight of cousin x 1.5m

    Weight of cousin  = 200N

Answer:

Newtons law of equal and opposite reactions

Explanation:

This is my best guess I'm sorry if it's not helpful

Answer:

Displacement is the shortest distance from your initial position to your final position. Therefore, displacement is a measurement of distance and not an "end-point."

Explanation:

Displacement is a difference between an initial value and a final value, not factoring in any changes that happen in between. For example you let an object of a certain volume sink to the bottom of a container of water, the water level will be displaced, or changed, by exactly the volume of that object.

Example: A marble with volume of 3 cm³ is dropped into a graduated cyllinder with 10 mL of water. The water level rises to the 13 mL mark, so the displacement of the water by the marble is exactly 3 mL.

This doesn't just apply to a change in volume: If I move a box 3 meters along an axis in the positive direction, we say its displacement along that axis is 3 meters. If I moved it in the negative direction the same distance, the displacement would be -3 meters.

Answer:

876m/s

Explanation:

Using the formula

1/2mv² = 3/2nRT

mv² = 3nRT

m is the mass = 0.02kg

v is the average velocity of atom

n is the mole = 2.00atm

T is the temperature = 308K

R is the Boltzmann constant = 8.31 J/(mol-K).

Get the velocity

v² = 3nRT/m

Substitute the given values into the formula

v² = 3×2(8.31)(308)/0.02

v² = 3×5,118.96/0.02

v² = 15356.88/0.02

V = √767844

v = 876.27m/s

Hence the average velocity of the atom us 876m/s

Answer:

W = 237825 [J]

Explanation:

Work in physics is defined as the product of force by the distance that the body travels.

The work can be calculated by means of the following equation.

[tex]W =F*d[/tex]

where:

W = work [J] (units of Joules)

F = force = 3150 [N]

d = distance = 75.5 [m]

Now replacing:

[tex]W=3150*75.5\\W=237825 [J][/tex]