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3 years ago

What is Acceleration?

2 answers:

5 0

Acceleration is the rate of change of velocity of an object. Thus when the velocity ( direction or magnitude) of an object changes, we say that the particle is accelerating. Mathematically it is written as

a= $\frac{dv}{dt}$

The units of acceleration are m/s²

Acceleration can be positive or negative. If the velocity of an object increases, we call that as positive acceleration and if the velocity of an object decreases, we call that as the negative acceleration.

Talja [164]3 years ago

5 0

Acceleration is a change in velocity over time. Acceleration can be either an increase of a decrease. Negative acceleration is sometimes called deceleration.

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What is the tool used for classifying organisms called? A. Dichotomy B. Dichotomous key C.Dichromic key D. Periodic table

ivolga24 [154]

It is B. Dichotomous key.

4 0

3 years ago

What is the effect on climate from these factors??

fenix001 [56]

The effect on the climate is that the climate goes up

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4 years ago

at what position an object be placed in front of a concave mirror of radius of curvature 40cm so that an erect image of magnific

Thepotemich [5.8K]

C=40cm
f=C/2=40/2=20

$\\ \sf\longmapsto m=\dfrac{f}{f-u}$

$\\ \sf\longmapsto 3=\dfrac{20}{20-u}$

$\\ \sf\longmapsto 3(20-u)=20$

$\\ \sf\longmapsto 60-3u=20$

$\\ \sf\longmapsto 3u=40$

$\\ \sf\longmapsto u=13.3cm$

m=magnification
f is focal length
C is radius of curvature
u is object distance

8 0

3 years ago

How many electrons can be on each ring of an atom?

harkovskaia [24]

Electron orbital shell is the correct terminology.

I'm not fresh on my chemistry, but size orbitals can hold increases as they move away from a cell. The maximum number of electrons that can occupy a specific energy level can be found using the following formula:

Electron Capacity = 2n²

<span>This means that the first shell can hold 2 electrons, the next 8, the third 18, the fourth 32, the fifth 50, and the sixth can hold 72.</span>

4 0

4 years ago

A soccer ball is kicked from the ground with an initial speed v at an upward angle θ. A player a distance d away in the directio

LuckyWell [14K]

Answer:

U = √Rg/sin2θ

Explanation:

Using the formula for "range" in projectile motion to derive the average speed before the ball hits the ground.

Range is the distance covered by the body in the horizontal direction from the point of launch to the point of landing.

According to the range formula,

R = U²sin2θ/g

Cross multiplying we have;

Rg = U²sin2θ

Dividing both sides by sin2θ, we have;

U² = Rg/sin2θ

Taking the square root of both sides we have;

√U² = √Rg/sin2θ

U = √Rg/sin2θ

Therefore, his average speed if he is to meet the ball just before it hits the ground is √Rg/sin2θ

3 0

3 years ago