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3 years ago

Pls help my with this projectile motion project if you answer right ill give 75 points !!!!!!!!

Physics

2 answers:

Nata [24]3 years ago

7 0

Answer:

what is

Explanation:

huh I'm confused

WITCHER [35]3 years ago

3 0

Answer:

pumpkins 2 and 3 will hit the target. i did the math

Explanation:

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The brakes of a lorry are in a poor condition

Vlada [557]

Answer:

friction

Explanation:

Her brakes will squeak and possibly slide or skid on concrete due to her brakes.

BUT it really depends on the condition of the wheels. Now it matters on the surface as well. Has the road been eroded? what has happened with her brakes? and what texture are the wheels? can seismic waves travel through them?

5 0

3 years ago

Two stationary positive point charges, charge 1 of magnitude 3.25 nC and charge 2 of magnitude 2.00 nC , are separated by a dist

Liula [17]

Complete Question

Two stationary positive point charges, charge 1 of magnitude 3.25 nC and charge 2 of magnitude 2.00 nC , are separated by a distance of 58.0 cm . An electron is released from rest at the point midway between the two charges, and it moves along the line connecting the two charges.

Required:

What is the speed of the electron when it is 10.0 cm from the +3.25-nC charge?

Answer:

The velocity is $v = 80.82 \ m/s$

Explanation:

From the question we are told that

The magnitude of charge one is $q_1 = 3.25 nC = 3.25 *10^{-9} \ C$

The magnitude of charge two $q_2 = 2.00 \ nC = 2.00 *10^{-9} \ C$

The distance of separation is $d = 58.0 \ cm = 0.58 \ m$

Generally the electric potential of the electron at the midway point is mathematically represented as

$V = \frac{ q_1 }{\frac{d}{2} } + \frac{ q_2}{\frac{d}{2} }$

substituting values

$V = \frac{ 3.25 *10^{-9} }{\frac{ 0.58}{2} } + \frac{ 2 *10^{-9} }{\frac{ 0.58}{2} }$

$V = 1.8103 *10^{-8} \ V$

Now when the electron is 10 cm = 0.10 m from charge 1 , it is (0.58 - 0.10 = 0.48 m ) m from charge two

Now the electric potential at that point is mathematically represented as

$V_1 = \frac{q_1}{ 0.10} + \frac{q_2}{ 0.48}$

substituting values

$V_1 = \frac{3.25 *10^{-9}}{ 0.10} + \frac{2.0*10^{-9}}{ 0.48}$

$V_1 = 3.67*10^{-8} \ V$

Now the law of energy conservation ,

The kinetic energy of the electron = potential energy of the electron

i.e $\frac{1}{2} * m * v^2 = [V_1 - V]* q$

where q is the magnitude of the charge on the electron with value

$q = 1.60 *10^{-19} \ C$

While m is the mass of the electron with value $m = 9.11*10^{-31} \ kg$

$\frac{1}{2} * 9.11 *10^{-19} * v^2 = [ (3.67 - 1.8103) *10^{-8}]* 1.60 *10^{-19}$

$v = \sqrt{6532.4}$

$v = 80.82 \ m/s$

4 0

3 years ago

As water across the surface of the earth it dissolves material as it travels. What property of water does this demonstrate?

iris [78.8K]

Answer:

B) Water is a solvent

Explanation:

Among many other chemicals, water can dissolve a variety of substances. The solvent properties of chemicals are far beyond it. That property makes water a universal solvent.

Water has one atom of oxygen and two atoms of hydrogen.

One side of the water molecule is positively charged and the other side is negatively charged. This property attracts other substances like salt and disintegrates into positive and negatively charged ions. This property is due to its physical and chemical nature.

3 0

3 years ago

1. The illuminance on a surface is 6 lux and the surface is 4 meters from the light source. What is the intensity of the source?

Crank

<u>Answer</u>

1) A. 96 Candelas

2) A. Both of these types of lenses have the ability to produce upright images.

3) C. 5 meters

<u>Explanation</u>

The formula for calculation the luminous intensity is;

Luminous intensity = illuminance × square radius

Lv = Ev × r²

= 6 × 4²

= 6 × 16

= 96 Candelabra

For converging lenses, an upright image is formed when the object is between the lens and the principal focus while a diverging lens always forms and upright image.

A. Both of these types of lenses have the ability to produce upright images.

Luminous intensity = illuminance × square radius

square radius = Luminous intensity/ illuminance

r² = 100/4

= 25

r = √25

= 5 m

5 0

4 years ago

Read 2 more answers

How does the force of gravity affects an objects acceleration

MrRissso [65]

Answer:

When objects fall to the ground, gravity causes them to accelerate.

Explanation:

Gravity causes an object to fall toward the ground at a faster and faster velocity the longer the object falls.

3 0

3 years ago