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2 years ago

If a 10-volt battery is placed across a 2-ohm resistance (R = 20), a current of

Physics

1 answer:

attashe74 [19]2 years ago

4 0

Answer: current I = 0.5 A

Explanation:

Given that the

Potential difference V = 10V

Resistance R = 20 ohms

According to ohms law

V = IR

Where

V = potential difference

I = current

R = resistance

Make I the subject of formula

I = V/R

I = 10/20

I = 0.5 Ampere

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The coordinates of a bird flying in the xy plane are given by x(t)=αt and y(t)=3.0m−βt2, where α=2.4m/s and β=1.2m/s2. Calculate

yuradex [85]

The derivative of the function space as a function of time is equal to a function of speed as a function of time.

$x(t)=2.4t \\ \frac{x(t)}{t}=t \\ v_{x}(t)=t \\ \\ y(t)=3-1.2\times t^2 \\ \frac{y(t)}{t}=1.2\times2t \\ v_{y}(t)=2.4t$

The velocity vector is given by the vector sum of the velocities of both axes.

$v_{R}^2(t)=v_{x}^2(t)+v_{y}^2(t) \\ v_{R}^2(t)=(t)^2+(2.4t)^2 \\ \boxed {v_R(t)=2.6t}$

If you notice any mistake in my english, please let me know, because I am not native.

4 0

3 years ago

Read 2 more answers

The tire on this drag racer is severely twisted: The force of the road on the tire is quite large(most likely several times the

Andrew [12]

Answer: Speeding Up

Explanation:

Force is proportional to the acceleration of an object. The greater the force, the more acceleration will be produced.

When the force on the tire is equal to the weight of the car, the car is reaching a stability as a result of increase in motion.

But when the force of the load on the tire is quite large(most likely several times the weight of the car) and is directed forward, then, the car is at high speed.

4 0

3 years ago

Insight therapies involve verbal interactions between a therapist and a client that are used to promote positive changes in one'

Furkat [3]

Answer:

True

Explanation:

Insight therapies are very powerful psychological tools used by therapist to help them unlock their past and provide a better well being and a more sound future.

It involves verbal communication between the client and the therapist.
The stages are grouped into sessions where both parties frequently meet.
Issues in the past that might be the premise of current behaviors are focused on.
The goal is to be able to annul the effect such issues currently have on the present lifestyle of the client.

8 0

2 years ago

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A person who weighs 509,45 N empties her lungs as much as

Masja [62]

Answer:

The weight of the girl = 1045.86 kg/m³

Explanation:

Density: This can be defined as the ratio of the mass of a body to the volume of that body. The S.I unit of density is kg/m³.

From Archimedes principle,

R.d = Density of the person/Density of water = Weight of the person in air/Upthrust.

⇒ D₁/D₂ = W/U............................... Equation 1.

Where D₁ = Density of the person, D₂ = Density of water, W = Weight of the person in air, U = Upthrust in water.

Making D₁ the subject of the equation,

D₁ = D₂(W/U)................................... Equation 2

Given: D₂ = 1000 kg/m³ , W = 509.45 N, U = lost in weight = weight in air - weight in water = 509.45 - 22.34 = 487.11 N

Substituting these values into equation 2

D₁ = 1000(509.45/487.11)

D₁ = 1045.86 kg/m³

Thus the weight of the girl = 1045.86 kg/m³

7 0

3 years ago

During which segments is kinetic energy decreasing? A)1,2,3 B) 4,5 C)1,3,5 D)2,4

Nutka1998 [239]

Answer:

Explanation:

kinetic energy is energy an object has due to its movement. for instance, if someone was riding down a hill, when the motion of the bike begins to decrease so does the kinetic energy

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2 years ago

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