Maria throws an apple vertically upward from a height of 1.3 m with an initial velocity of +2.8 m/s. Will the apple reach a friend in a tree house 5.9 m above the ground? The acceleration due to gravity is 9.81 m/s 21. No, the apple will reach 5.27136 m below the tree house2. Yes, the apple will reach 5.27136 m above the tree house3. No, the apple will reach 1.43117 m below the tree house4. No, the apple will reach 1.5289 m below5. Yes, the apple will reach 1.5289 m above the tree house6. Yes, the apple will reach 1.43117 m above the tree house

Answers

Answer 1
Answer:

Answer:

No, the apple will reach 4.20041 m below the tree house.

Explanation:

t = Time taken

u = Initial velocity = 2.8 m/s

v = Final velocity = 0

s = Displacement

g = Acceleration due to gravity = -9.81 m/s² = a (negative as it is going up)

Equation of motion

v^2-u^2=2as\n\Rightarrow s=(v^2-u^2)/(2a)\n\Rightarrow s=(0^2-2.8^2)/(2* -9.81)\n\Rightarrow s=0.39959\ m

The height to which the apple above the point of release will reach is 0.39959 m

From the ground the distance will be 1.3+0.39959 = 1.69959 m

Distance from the tree house = 5.9-1.69959 = 4.20041 m

No, the apple will reach 4.20041 m below the tree house.

The values in the option do not reflect the answer.

Answer 2
Answer:

Final answer:

The apple will not reach the friend in the tree house as it will only reach a height of approximately 1.527 m.

Explanation:

To determine whether the apple will reach a friend in a tree house 5.9 m above the ground, we can use the equations of motion. Since the apple is thrown vertically upward, it will experience a negative acceleration due to gravity. Using the equation h = vo*t + (1/2)*a*t^2, where h is the final height, vo is the initial velocity, a is the acceleration, and t is the time, we can calculate the time it takes for the apple to reach a height of 5.9 m. Plugging in the values, we get:

5.9 = 2.8*t + (1/2)*(-9.81)*t^2

Simplifying the equation, we have:

-4.905*t^2 + 2.8*t - 5.9 = 0

Using the quadratic formula, we can solve for t. The quadratic formula is t = (-b ± sqrt(b^2 - 4ac)) / (2a), where a = -4.905, b = 2.8, and c = -5.9.

Plugging in the values, we get:

t = (-2.8 ± sqrt(2.8^2 - 4*(-4.905)*(-5.9))) / (2*(-4.905))

After evaluating the formula, we find that the apple will take approximately 1.527 seconds to reach a height of 5.9 m. Since the apple continues to rise after reaching this height, it will not reach the friend in the tree house.


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Determine the weight of a 2959.0-kg car that is moving at a speed of 21 m/s. Enter anumerical answer.

Answers

The weight of a 2959.0-kg car that is moving at a speed of 21 m / s would be 28998.2 Newtons, here speed of the car is the redundant value that is not used to calculate the weight of the car.

What is gravity?

It can be defined as the force by which a body attracts another body toward its center as the result of the gravitational pull of one body and another.

As given in the problem, we have to determine the weight of a 2959.0-kg car that is moving at a speed of 21 m / s .

The weight of the car = mass of the car × acceleration due to gravity

                                    = 2959 × 9.8

                                    = 28998.2 Newtons

Thus, the weight of a 2959.0-kg car that is moving at a speed of 21 m / s would be 28998.2 Newtons.

To learn more about gravity here, refer to the link given below ;

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weight=mass*gravity

w=2959.0*10

w=29590N

What is a quantity Described completely by its magnitude

Answers

Answer:

Scalar

Explanation:

A physical quantity that is completely described by its magnitude; examples of scalars are volume, density, speed, energy, mass, and time. Other quantities, such as force and velocity, have both magnitude and direction and are called vectors.

Which term refers to the phenomenon of light shining on a metal and causing electrons to break free from their atoms?A. Blackbody radiation

B.Ultraviolet catastrophe

C. Emission spectra

D. Photoelectric effect

Answers

D. Photoelectric Effect
Photoelectric effect.

A gas is heated from 263 K to 298 K, and the volume is increased from 24 L to 35 L. If the original pressure is 1 atm, what would the final pressure be? *

Answers

Since for closed system moles of the gas is always conserved

so as per idea gas equation we can say

n = (PV)/(RT)

so here we can say

n_1 = n_2

so here we have

(P_1V_1)/(RT_1) = (P_2V_2)/(RT_2)

as we know that

T_1 = 263 K

T_2 = 298 K

V_1 = 24 L

V_2 = 35 L

P_1 = 1 atm

now from above equation

(1*24)/(263) = (P*35)/(298)

on solving above equation we have

P = 0.78 atm

so here pressure will be 0.78 atm

Final answer:

Based on the combined form of the ideal gas law, the final pressure of the gas, given the changes in volume and temperature, would be approximately 0.725 atm.

Explanation:

The question concerns the change in conditions of a gas and asks you to determine the final pressure. This deals with the combined form of the ideal gas law, which states that the product of the initial pressure and volume, divided by the initial temperature, equals the product of the final pressure and volume, divided by the final temperature (P₁V₁/T₁ = P₂V₂/T₂).

Given that the initial pressure P₁ is 1 atm, initial volume V₁ is 24 L, initial temperature T₁ is 263 K, final volume V₂ is 35 L, and final temperature T₂ is 298 K, we can substitute these values into the equation to solve for the final pressure P₂.

Therefore, P₂ = P₁V₁T₂ / V₂T₁ = (1 atm × 24 L × 298 K) / (35 L × 263 K) ≈ 0.725 atm. So, the final pressure of the gas would be approximately 0.725 atm.

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An American manufacturer supplied a customer with refrigerators with electrical cords that were one yard long instead of 1 meter long. What was the difference in cord length (cm)?a. 0.856 cmb. 85.6 cmc. 8.56 cmd. 0.00856 cme. 856 cm

Answers

Answer:

C. 8.56cm

Explanation:

Since we are to get the difference of cord length in centimeter, there fore we will have to convert the one yard and one metre length of wires to centimeters.

For 1m length of cord

1m = 100cm

For 1yard length of cord

1yard = 91.44cm

Difference in cord length = 100cm - 91.44cm

= 8.56cm

Answer:

C.

Explanation:

A meter is 8.56 centimeters longer than a yard. Something to keep in mind is that a meter is about 10% longer than a yard.

Hope this helps :)

The sentence Walking the wire, my dog waited for the squirrel to fall is an example of _____.split infinitive
parallel structure
dangling participle
none of these

Answers

The answer is dangling participle. The dog wasn't walking the wire, the squirrel was. It is modifying the wrong noun.

Answer:

dangling participle

Explanation: