Okay I need help with this question.....-_-
When does an object have no kinetic energy
P.S I need the answer ASAP

The solution to this task is f00king Dis.

Answer:

The moon Phobos orbits Mars

(mass = 6.42 x 1023 kg) at a distance

of 9.38 x 106 m. What is its period of

orbit?

Explanation:

Answer: 27.9816 x 10^3 is the period of orbit

Answer:

Positive speed means ur going forward. Negative speed means ur going backward.

Explanation:

Answer:

velocity is usually always positive if the object is moving to the right but is negative if the object is moving to the left.

Explanation:

speed tells how fast the object is moving without saying anything about it's direction. but speed will always be positive

Explanation:

Electrical resistance can be defined as the opposition to the flow of current in an electric circuit or wire. The resistance converts electrical energy into thermal energy, this serves as friction in mechanical systems. And this electrical energy converted to thermal is dissipated.

By ohm's law we have

Resistance R = Voltage V/ Current I

Answer:

to be an eginere u would have to go to college and study hard

Explanation:

Answer:

The equal and opposite force is equal to the sum of any frictional force to the product of the mass of the wagon and the acceleration of the wagon

Explanation:

Newton's third law states that for every action, or force, there is an equal and opposite reaction

The equal and opposite force = The mass of the Wagon, m × The acceleration of the wagon, a + Any frictional force present, [tex]F_f[/tex]

Whereby the force with which the horse pulls the wagon = F, mathematically, we have;

The equal and opposite force = -F = m × a + [tex]F_f[/tex].

Answer:

Ground pushes up on the horse’s hooves

Explanation:

khan academy

Answer:

See explanation

Explanation:

To find out the electronic structure of each element, you must know the number of electrons it contains.

If you find that out(the number of electrons in the neutral atom of an element is the same as its atomic number). Then you arrange those electrons in such a way that the first shell has only two electrons and subsequent shells have eight electrons.

Look up the groups to which the elements belong in the periodic table All the elements are in group 1 so the last shell must have only one electron.

Answer:

See the answers below.

Explanation:

To solve this problem we must use the following equation of kinematics.

[tex]y=y_{o}+v_{o}*t+0.5*g*t^{2}[/tex]

where:

y = final elevation [m]

yo = initial elevation = 0

vo = initial velocity = 19.6 [m/s]

t = time required [s]

g = gravity acceleration = 9.81 [m/s²]

Now we can replace the different times in the equation above.

For  t = 1 [s]

[tex]y=0+(19.6*1)-0.5*9.81*(1^{2} )\\y = 14.7 [m][/tex]

For  t = 2 [s]

[tex]y=0+(19.6*2)-0.5*9.81*(2^{2} )\\y = 19.58 [m][/tex]

For  t = 3 [s]

[tex]y=0+(19.6*3)-0.5*9.81*(3^{2} )\\y = 14.7 [m][/tex]

For  t = 4 [s]

[tex]y=0+(19.6*4)-0.5*9.81*(4^{2} )\\y = -0.08 [m][/tex]

We can see that the sign of gravitational acceleration is negative, since it points in the opposite direction to the motion of the launch.

Note when the time is equal to 4 seconds we see that the distance is 0, ie the tennis ball has reached its maximum height and begins to descend.

[tex]volume \: = 250 \: ml \\ 1 \: ml = 1 {cm}^{3} \\ 250 \: ml = (1 \times 250) = 250 {cm}^{3} \\ mass \: = \: \frac{density}{volume} \\ mass \: = \: \frac{1.84}{250} \\ mass \: = \: 0.00736 \: g[/tex]

The mass of the sulfuric acid will be 0.00736 g.

A physical body's mass is the amount of matter it contains. This is also a measurement of inertia of a particular body, or resistance to acceleration whenever a net force will be applied.

Calculation of mass.

Given data:

density (d) = 1.84 g/cm

volume (v) = 250 ml

Now, use the mass formula.

Mass (m) = density (d) / volume (v)

Mass (m) = 1.84 / 250

Mass (m) = 0.00736 g

Therefore, the mass of the sulfuric acid will be 0.00736 g.

To know more about mass.

https://brainly.com/question/19694949.

#SPJ2

Answer:

See the answer below

Explanation:

A poker that will effectively and safely function to move pieces of coal or logs in a burning fire must be fireproof itself. Hence, to be as safe as possible, such poker should be made from a material that is fireproof and that does not conduct a lot of heat. Otherwise, the poker will catch fire/becomes too hot during the course of usage.

Answer:

1) Periodically check the no stop or NDL time on their computers

2) The dive computer planning mode can be used if available

3) Make use of a dive planning app

4) Check data from the RDP table or an eRDPML

Explanation:

The no stop times information from the computer gives the no-decompression limit (NDL) time allowable which is the time duration a diver theoretically is able to stay at a given depth without a need for a decompression stop

The dive computer plan mode or a downloadable dive planning app are presently the easiest methods of dive planning

The PADI RDP are dive planners based on several years of experience which provide reliable safety limits of depth and time.

Answer: 1333 m

the length of runway it will need is S = [tex]\frac{90^{2}-10^{2} }{2.3}=1333[/tex] (m)

Explanation:

Answer:

In both cases the height is greater than 10.3 m

Explanation:

Pressure is defined by the relationship

       P = F / A

in this case the force is the weight of the two gases

       F = W = m g

If we use the definition of density

      ρ = m / V

      V = A h

      m = ρ A h

we substitute

       P = ρ g h

       h = [tex]\frac{P}{\rho g}[/tex]

For this case the density of the gases is

       ρ' = 0.9 [tex]\rho_{water}[/tex]

       h =[tex]\frac{P}{0.9 \ \rho_{water} g}[/tex]

we calculate

     ρ’= 0.9 \rho_{water}

     h = 1 105 / (0.9 1000 9.8)

     h = 11.3 m

      ρ’= 0.8 \rho_{water}

       h = 1 105 / (0.8 1000 9.8

       h = 12.8 m

In both cases the height is greater than 10.3 m

Answer:

Answer is interference

First, let

f = mag. of static friction

n = mag. of normal force

w = m g = mag. of gravitational force (the weight of the block)

m = mass of the block

g = 9.80 m/s² (the mag. of the acceleration due to gravity)

a = acceleration of the block

It's the static friction that interests us at the moment "when it begins to slide", meaning the precise moment at which static friction is at its maximum. At that point, the friction has magnitude f such that

f = 0.5 n

The problem is much easier to work through if you split up the forces into components acting parallel and perpendicular to the ramp. By Newton's second law, we have

• the net force acting parallel to the ramp is

∑ F = - f + w sin(30°) = m a

• and the net force acting perpendicular to the ramp is

∑ F = n - w cos(30°) = 0

Hence the net force on the block as it begins to slide acts only in the parallel direction. Note that we take the positive parallel direction to be the one in which the block slides down the ramp (i.e. opposing the friction force), and the positive perpendicular direction to be the same as the normal force.

Solve the second equation for n :

n = m g cos(30°) = (100 kg) (9.80 m/s²) cos(30°) ≈ 849 N

Then

f = 0.5 (849 N) ≈ 424 N

and so the net force on the block is

∑ F ≈ - 424 N + (100 kg) (9.80 m/s²) sin(30°) ≈ 65.6 N

Next, you want to find the acceleration of the block as it is sliding down the ramp, during which time kinetic friction kicks in. We have the same equations as above, except now f = 0.3 n. So we still have n ≈ 849 N, which gives

f = 0.3 (849 N) ≈ 255 N

∑ F = - f + w sin(30°) = m a

→   - 255 N + (100 kg) (9.80 m/s²) sin(30°) ≈ (100 kg) a

→   a ≈ 2.35 m/s²

Answer:

The  repulsive electrostatic force between two of the protons is 14.4 N.

Explanation:

Given;

distance between the two protons, r = 4 x 10⁻¹⁵ m

charge of a proton, q = + 1.6 x 10⁻¹⁹ C

The repulsive electrostatic force between two of the protons is calculated by applying Coulomb's law;

[tex]F = \frac{k q_1 q_2 }{r^2} \\\\where;\\k \ is \ Coulomb's \ constant = 9\times 10^9 \ Nm^2/C^2 \\\\F = \frac{9\times 10^9 \ (1.6\times 10^{-19})^2}{(4 \times 10^{-15})^2} \\\\F = 14.4 \ N[/tex]

Therefore, the  repulsive electrostatic force between two of the protons is 14.4 N.

Answer:

speed described how fast the object moves velocity describes how fast and in what direction its moved..

Answer:

The illuninance being multiplied by 9

Explanation:

Answer:

The illuminance will be multiplied by 9.

Explanation:

Answer:

f = 1/t

1/1

=1

Explanation:

The frequency f = 1/T = ω/2π of the motion gives the number of complete oscillations per unit time. It is measured in units of Hertz, (1 Hz = 1/s).

Answer:

Rust occurs when iron or its alloys, such as steel, corrode. The surface of a piece of iron will corrode first in the presence of oxygen and water.The process of rusting is a combustion reaction, similar to fire. Left in contact with oxygen, iron will react with the oxygen to form rust.

Hope this helps!!

Answer:

iron is oxidation reaction

Explanation:

it occurs when iron reacts with water and oxygen to form hydrated iron(iii) oxide

Answer:

3.68 m/s

Explanation:

Applying the equation of motion;

v = u + at. ....1

Where

u = initial speed

v = final speed

a = acceleration

t = time taken

Given;

Total time of flight t = 0.75s

Acceleration due to gravity g = 9.8 m/s^2

Considering the first phase of flight, during the upward motion to the maximum height. The final velocity at the maximum height is zero and the time of flight of the phase is equal to half of the total flight time.

v1 = 0

t1 = t/2 = 0.75/2 =0.375s

From equation 1;

v1 = u - gt1

Substituting the values;

0 = u - 9.8(0.375)

Solving for u;

u = 9.8(0.375)

u = 3.675

u = 3.68 m/s

Initial velocity = 3.68 m/s

Chef Andy tosses an orange in the air, then catches it again at the same height. The orange is in the air for 0.75 s. We can ignore air resistance.

What was the orange's velocity at the moment it was tossed into the air?

Answer: 3.68 m/s

Answer:

B

Explanation:

Answer:

displacement: 0

Distance: 30

Explanation:

lol, i asked my brother, he's also in 10th grade

Answer:

D. Can be done anywhere outside

Explanation:

Because it's true sports can be done pretty much anywhere outside

The volume should be 7.16 L

Since there is a submarine with a volume of 1,510 liters has an internal pressure of 1.20atm. Also, there should be a pressure of 253atm pushing on it.

Here we used the Apply boyles law

So,

1510*1.20 = volume *253

So, the volume should be 7.16 L

hence, the volume is 7.16 L

learn more about volume here: https://brainly.com/question/16762398

Answer:

Group IA elements have only one valency electron while Group IIA have two valency electrons.

Group IA elements have cations with higher charge density hence polarizing anions easier resulting into covalent character while Group IIA elements have cations with lower charge density hence difficulty in distorting anions resulting into a ionic character. This is due to difference in cationic radii and charges

Answer:

11.25km/h²

Explanation:

Acceleration = Velocity / Time

Acceleration = 90 / 8

Acceleration = 11.25

Answer:C

Explanation:  I took the quiz if you don't believe me then your gonna miss the problem.

Answer:

Hi... Your answer is B... a is not work because work is ziro