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olga_2 [115]
3 years ago
6

Can someone please help me and write the answers? i need this and it’s really important!!

Physics
1 answer:
eduard3 years ago
5 0

-- Kinetic energy is the energy of mass in motion.  The amount is determined by the mass of whatever is moving, and its speed.

-- Potential energy is the energy that's stored up in some form, not being used yet but ready to be used when you want it.

For example, one form of it is <u><em>chemical</em></u><em> </em>potential energy, like in a battery, or a match.  You get the energy out of a battery when you connect it to a motor or a light.  You get the energy out of as match when you make the tip hot and it flares up.

This question is asking about <u><em>gravitational</em></u> potential energy.  An object has stored energy just by being up high, like a bowling ball on a shelf.  You get the energy out of it just by dropping it ... possibly enough to crack the floor !

The amount of this kind of potential energy is determined by the mass of the object, and how high up it is.

-- Getting the answers from other people doesn't help you a bit, until you understand them and can answer the question on your own.

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A fish swimming in a horizontal plane has velocity i = (4.00 + 1.00 ) m/s at a point in the ocean where the position relative to
ryzh [129]

Answer:

a. The horizontal component of acceleration a₁ = 0.68 m/s²

The vertical component of acceleration a₂ = -0.11 m/s²

b. -9.19° = 350.81° from the the positive x-axis

Explanation:

The initial velocity v₁ of the fish is v₁ = 4.00i + 1.00j m/s. Its final velocity after accelerating for t = 19.0 s is v₂ =  17.0i - 1.00j m/s

a. The acceleration a = (v₂ - v₁)/t = [17.0i - 1.00j - (4.00i + 1.00j)]/19 = [(17.0 -4.0)i - (-1.0 -1.0)j]/19 = (13.0i - 2.0j)/19 = 0.68i - 0.11j m/s²

The horizontal component of acceleration a₁ = 0.68 m/s²

The vertical component of acceleration a₂ = -0.11 m/s²

b. The direction of the acceleration relative to the unit vector i,

tanθ = a₂/a₁ = -0.11/0.68 = -0.1618

θ = tan⁻¹(-0.1618) = -9.19° ⇒ 360 + (-9.19) = 350.81° from the the positive x-axis

6 0
3 years ago
A tunnel under a river is 2.00 km long. (a) At what frequencies can the air in the tunnel resonate? (b) Explain whether it would
Damm [24]

Answer:

nine

Explanation:

cuz

7 0
3 years ago
A good model of the cell membrane would be
Nonamiya [84]
B. A film of food wrap. The cell membrane is the outermost layer that is protecting the cell
6 0
3 years ago
A cassette recorder uses a plug-in transformer to convert 120 V to 12.0 V, with a maximum current output of 200 mA. What is the
goldfiish [28.3K]

Answer:

20 mA

Explanation:

We have given that the transformer convert 120 V to 12 V means it is a step down transformer

The turn ratio of the transformer is given as a=\frac{N_1}{N_2}=\frac{V_1}{V_2}=\frac{120}{12}=10 here V_! is primary voltage and V_2 is secondary voltage

As the voltage decreases from primary to secondary so current will increase from primary to secondary

We have given output current that is secondary current so primary that is input current will be less

So input current =\frac{200}{10}=20mA

4 0
3 years ago
While driving on a rural road, your right wheels run off the pavement. You should hold the steering wheel firmly and
Vsevolod [243]

Answer:

The answer is C. Steer in a straight line while gently slowing down

Explanation:

The following are advised when your cars go off the pavement while driving;

firstly, Do not panic.

ensure you hold on to your steering wheel tightly.

keep Steering straight ahead.

ensure you Stay on the shoulder.

Ease up on the accelerator and brake gently.

When you  know you can safely do so, turn back on the road at a much lower speed.

3 0
3 years ago
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