Which energy source contributes least to global warming?
A. Coal
B. Natural gas
C. Solar
D. Petroleum

Answer:

down below

Explanation:

for a scale, kg is used, as well as grams

for force, newtons is used

Answer:

yes its travelling at 79.2 km/h (49.2m/h)

Answer: Optical test is a test which is used to assess vision and ability of the person to focus on the objects.

Explanation:

The following are the advantages of utilizing plane mirror in optical testing:

1. When a plane mirror is used for testing the image of the test card must be placed at distance equal to the distance of the object.  

2. Larger distance in between the object or test card and viewer is obtained. This can help in determining the exact ability of the eye to focus on objects.

Answer:

[tex]125\:\mathrm{minutes\: or\: }2.08\bar{3}\: \mathrm{hours}[/tex]

Explanation:

Speed is given by [tex]s=\frac{d}{t}[/tex], where [tex]d[/tex] is distance travelled and [tex]t[/tex] is time. Rearranging this equation, we have [tex]t=\frac{d}{s}[/tex].

Plugging in our given information:

[tex]t=\frac{d}{s}=\frac{1500\:\mathrm{km}}{720\:\mathrm{km/h}}=2.08\bar{3}\: \mathrm{hours}[/tex]

Thus, our answer is:

[tex]2.08\bar{3}\: \mathrm{hours}\cdot \frac{60\:\mathrm{minutes}}{1\:\mathrm{hour}}=\fbox{$125\:\mathrm{minutes}$}[/tex]

Answer:

product

Explanation:

Answer:

product

Explanation:

You find the product when you multiply two or any number of factors.

Answer:

Hand ball ?

Explanation:

Answer:

[tex]6.18\:\mathrm{m/s}[/tex]

Explanation:

The momentum of an object is given by [tex]p=mv[/tex].

Plugging in values, we have:

[tex]218=35.2v,\\v=\frac{218}{35.2}=\fbox{$6.18\:\mathrm{m/s}$}[/tex].

Answer:429.338 J; 25.7 m/s; 127.4 J

Explanation:

Given

mass of ball m=1.3 kg

Height of building H=33.7 m

(a)Potential Energy before dropping [tex]=mgH=1.3\times 9.8\times 33.7=429.338\ J[/tex]

(b)Velocity Just before hitting the ground

[tex]v=\sqrt{2gH}=\sqrt{2\times 9.8\times 33.7}=25.7\ m/s[/tex]

(c)After falling 10 m

Here initial velocity is zero

using [tex]v^2-u^2=2as[/tex]

Here,

[tex]v=\text{final veloity}[/tex]

[tex]u=\text{Initial velocity}[/tex]

[tex]a=\text{acceleration due to gravity}[/tex]

[tex]s=\text{displacement}[/tex]

Putting values

[tex]v^2-0=2\times 9.8\times 10\\v=14\ m/s[/tex]

So, kinetic energy  [tex]\dfrac{mv^2}{2}=\dfrac{1.3\times 196}{2}=127.4\ J[/tex]

The intensity of the electric current of a circuit is 123A and the electric charge is 1.7C to find the time interval in which the electric charge is transported.

Given that,

Current, I = 123 A

Electric charge, q = 1.7 C

To find,

The time interval in which the charge is transported.

Solution,

The electric current is given by electric charge per unit time. So,

[tex]I=\dfrac{q}{t}\\\\t=\dfrac{q}{I}\\\\t=\dfrac{1.7}{123}\\\\t=0.0138\ s[/tex]

So, the required time is 0.0138 seconds.

Answer:

v = 7 m/s

Explanation:

p = m × v

42 = 6 × v

6v = 42

v = 42/6

v = 7 m/s

Answer: What is the force that opposes motion between two surfaces in contact with each ... How is the relationship among mass, force and acceleration explained? ... When a force is exerted on a box, an equal and opposite force is exerted by the box.

Answer:

Because both monomers and polymers and cross linked polymers are mers with physically properties which is good for applycations

Explanation:

because they are good for using and not using

also, this is a 5 point question, you are not  fooling anyone. thx for 5 points tho

Answer:

The last option.

Explanation:

Since you are going down, the gravitational potential energy would go down too. Thus, the gravitational potential energy decreases.

Since the gravitational potential energy is converted to kinetic energy when you move down, there is an increase in kinetic energy.

Answer:

The fourth option

Explanation:

Explanation:

600 ÷ 60 = 10

1500 ÷ 10 = 150 minutes

I don't know how you should express the answer in:

So it's either 150 minutes or 2 hours and 30 minutes.

(This is kind of like mathematics, not physics)

Answer:

ezrfdjhsetnhtjhsksdjghbksfneunaifghejbcifkikjayhr

Explanation:

Answer:

acceleration...............

Answer:

speed

Explanation:

wanna see some real speed betch

Answer:

38.75N

Explanation:

According to Newton's second law

\sum Fx = ma

Fm-Ff = ma

Fm is the moving force

Fm = mgsin theta

Fm = 15(9.8)sin38

Fm = 90.5N

Ff is the frictional force

m is the mass = 15kg

a is two acceleration

Get the acceleration

a= F/m

a = 52/15

a ,= 3.45m/s²

Substitute the given values into the formula

90.5-Ff = 15(3.45)

90.5-Ff = 51.75

Ff = 90.5-51.75

Ff = 38.75N

Hence the frictional force on the box is 38.75N

Answer:

faster than 100 kph

Explanation:

Time taken to complete the first lap is

[tex]\dfrac{15\ \text{km}}{15\ \text{kph}}=1\ \text{hour}[/tex]

If the person's average speed is to be 30 kph then the complete race would be over in [tex]\dfrac{30}{30}=1\ \text{hour}[/tex]

But 1 hour has passed in the first lap already so, the next 15 km must be covered in 0 time.

So, the speed of the bike must be more than 100 kph.

Answer:

Electrical force is directly proportional to the product of the charges on the two objects.

Explanation:

The electric force between two charges is given by :

[tex]F=\dfrac{kq_1q_2}{d^2}[/tex]

Where

k is electrostatic constant

q₁ and q₂ are charges

d is the distance between charges

It can be very clear that the electric force is directly proportional to the product of charges and inversely proportional to the square of the distance between them.

Hence, the correct option is (a) "Electrical force is directly proportional to the product of the charges on the two objects".

Answer:

1400 N

Explanation:

Verá, durante el salto mortal, el piloto se mueve en una trayectoria circular y la fuerza que actúa sobre él es una fuerza centrípeta.

Sea la fuerza centrípeta F, la masa del piloto (m) = 70 Kg, el radio (r) = 500 my la velocidad (v) = 360 km / hr * 1000/3600 = 100 m / s

F = mv ^ 2 / r

F = 70 * (100) ^ 2/500

F = 1400 N

Answer:

D. 90km/hr due West

Explanation:

Given parameters:

Displacement  = 1215km

Time  = 13.5hr

Unknown:

Velocity  = ?

Solution:

Velocity is the displacement divided by the time taken;

   Velocity  = [tex]\frac{displacement}{time}[/tex]   = [tex]\frac{1215km}{13.5hr}[/tex]   = 90km/hr

Velocity is 90km/hr due West

Answer:T

Explanation:

i feel like it doesn't have enough info

Answer: impulse and momentum

Explanation:

Impulse and momentum-  two quantities can be expressed using the same units. Hence, option (4) is correct.

In physics, the term "impulse" is used to characterize or measure the impact of force operating gradually to alter an object's motion. It is often stated in Newton-seconds or kilograms per second and is denoted by the symbol J.

Because a body with momentum cannot be halted, it must be forced to move in the opposite direction for a predetermined amount of time. The harder it is to stop, the more momentum there is. Consequently, more force must be applied and more time must be spent to stop the body.

Mathematically,

impulse = force· time

= mass × acceleration × time

= mass × ( change in velocity/time) × time

= mass ×  change in  velocity

=  change in momentum.

Hence, both Impulse and momentum have same unit.

Learn more about impulse here:

https://brainly.com/question/16980676

#SPJ2

Answer:

For an object to accelerate, appropriate force must be applied to the object to cause it to change it’s velocity if it’s already in motion. However, to cause it to overcome static friction if it is at rest, and cause it to change it’s velocity

Explanation:

Answer:

Explanation:

V_{1} = first volume

V_{2} = second volume

T_{1} = first temperature

T_{2} = second temperature

Answer:

B. Increasing temperature.

Explanation:

Atmospheric pressure increases with increasing temperature because warm air causes the atmospheric pressure to rise.

Basically, when the molecules contained in air experience a collision, they usually exert forces on one other, and when these molecules become heated, they experience a quick and rapid motion leading to an increased rate of collision. Therefore, as more force is being exerted on the air molecules, the atmospheric pressure tends to rise or increase.