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statuscvo [17]
3 years ago
8

Why is the answer B and not E?

Physics
2 answers:
makkiz [27]3 years ago
8 0

Answer:  B

<u>Explanation:</u>

E shows the direction of the ball but the question asks about the direction of the STICK, which is the opposite of the ball.

Margarita [4]3 years ago
5 0

Explanation:

The ball's horizontal velocity changes from vi to 0, so the acceleration is negative, meaning the force component must point to the left.

The ball's vertical velocity changes from 0 to vf, so the acceleration is positive, meaning the force component must point up.

So you're looking for a force that points to the left and up, where the horizontal component is greater than the vertical component.

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A flask contains equal masses of f2 and cl2 with a total pressure of 2.00 atm at 298k. What is the partial pressure of cl2 in th
Sindrei [870]

Answer:

Partial Pressure of F₂ = 1.30 atm

Partial pressure of Cl₂ = 0.70 atm

Explanation:

Partial pressure for gases are given by Daltons law.

Total pressure of a gas mixture = sum of the partial pressures of individual gases

Pt = P(f₂) + P(cl₂)

Partial pressure = mole fraction × total pressure

Let the mass of each gas present be m

Number of moles of F₂ = m/38 (molar mass of fluorine = 38 g/Lol

Number of moles of Cl₂ = m/71 (molar mass of Cl₂)

Mole fraction of F₂ = (m/38)/((m/38) + (m/71)) = 0.65

Mole fraction of Cl₂ = (m/71)/((m/38) + (m/71)) = 0.35 or just 1 - 0.65 = 0.35

Partial Pressure of F₂ = 0.65 × 2 = 1.30 atm

Partial pressure of Cl₂ = 0.35 × 2 = 0.70 atm

7 0
3 years ago
After travelling 4.0 km, the train reaches its maximum speed. it continues at this constant speed on the next section of the tra
lozanna [386]

Answer:

  toward the center of the circular curve

Explanation:

An object will follow a circular path at constant speed if and only if its net acceleration is constant and directed toward the center of the curved path.

__

The result force is directed toward the center of the circle.

_____

<em>Additional comment</em>

If any part of the result force is in the direction of motion, the speed will not be constant. If the center-directed force is not constant, the path will not be circular.

5 0
2 years ago
The light bulb transfers electrical energy into light. What is one type of energy that is also generated that is NOT a desired e
zimovet [89]

The old style (incandescent) light bulb converts more energy
into heat than it does into light.  If you're using it mainly as a
source of light, then it's a bummer, and its efficiency is very low. 
BUT ... if you're using an incandescent light bulb as a heater, then
its efficiency is much better.  It all depends on your point of view.

8 0
3 years ago
Read 2 more answers
a race car is traveling at a speed of 80.0m/s on a circular race track of radius 450m what is the centripetal acceleration
slega [8]

Answer:

The answer of this question is =1.258*10-4

4 0
3 years ago
PLS ANSWER FAST WILL GIVE BRAINLY TIMED TEST
solong [7]
A=F/m
a=(3000000)/(20000)
a=15 m/s^2
4 0
2 years ago
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