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If a 1300 kg car can accelerate from 35 km/h to 65 km/h in 4.3 s , how long will it take to accelerate from 65 km/h to 95 km/h ? Assume the power stays the same, and neglect frictional losses.

Chris jumps off a bridge with a bungee cord (a heavy stretchable cord) tied around his ankle, (Figure 1) . He falls for 15 m before the bungee cord begins to stretch. Chris's mass is 78 kg and we assume the cord obeys Hooke's law, F=−kx, with 56 N/m .

If we neglect air resistance, estimate what distance d below the bridge Chris's foot will be before coming to a stop. Ignore the mass of the cord (not realistic, however) and treat Chris as a particle.

A 21.0-kg child descends a slide 2.10 m high and reaches the bottom with a speed of 1.50 m/s .

How much thermal energy due to friction was generated in this process?

A skier traveling 11.0 m/s reaches the foot of a steady upward 20 ∘ incline and glides 14 m up along this slope before coming to rest.

What was the average coefficient of friction?

An automobile traveling 95 km/h overtakes a 1.00 km -long train traveling in the same direction on a track parallel to the road.

1. If the train's speed is 75 km/h, how long does it take the car to pass it?

Express your answer to two significant figures and include the appropriate units.

2. How far will the car have traveled in this time?

3. How long does it take the car to pass the train if the car and train are traveling in opposite directions?

4. How far will the car have traveled in this time?

Determine the stopping distances for an automobile going a constant initial speed of 94 km/h and human reaction time of 0.30 s , for an acceleration a=−3.6m/s^2.

Express your answer using two significant figures.

D= ________ m

Determine the stopping distances for an automobile going a constant initial speed of 94 km/h and human reaction time of 0.30 s, for an acceleration a=−5.8m/s^2.

D=_________ m

Please help! Thanks in advance!

I really need to know. Please and thanks

Use a sign chart to determine the intervals on which each function f is increasing or decreasing. Then verify your algebraic answers with graphs

1. F(x) = x^3 + 4x^2 + 4x -5

2. F(x) = 3x + 1/ x^2 - 1

Movement of water between plasma, extracellular fluids, and intracellular fluid

occurs largely by osmosis, and depends on the relative osmolarity of fluids on either side

of a membrane. Recall that water moves from areas of high to low water concentration,

which corresponds to moving from areas of low to high solute concentration. To maintain

homeostasis, the osmolarity of different body compartments must be carefully regulated.

1. The osmolarity of plasma is maintained at about 300 mOsM.

a. What would the osmolarity inside a red blood cell be to maintain

equilibrium between the intracellular fluid and plasma?

b. If the osmolarity of plasma increased, what would happen to the size of a

red blood cell?

c. If the osmolarity of plasma decreased, what would happen to the size of a

red blood cell?

Having trouble with a few questions, I'm not sure of the questions......

You made a 120 mL solution containing 1.0 g of NACl. (MW= 58.5 g/mole)

A. Whats the concentration of this solution in g/L?

B. What is the osmolarity of this solution (osmoles/L)?

C. What % solution did you make?

I was thinking that the % solution was 12 and the concentration was also 12, but I'm not sure if that is right.

2. A patient is prescribed 2.0 g of amoxicillin every 8 hours. The amoxicillin oral suspension liquid is labeled 250 mg/ 5 mL.

A. How many ml should be administered at each dose?

B. How many mg of amoxicillin are in each dose?

C. How many ug?

3. A patient is prescribed 40 mg of Codeine elixir. The bottle is labeled 10 mg/5 mL.

A. What is the molarity of this solution?

(MW codeine monohydrate = 317.4 g/ mol)

B. How many mL do you need to give the patient?

4. You are required to give a patient 1.4 g of Equantil to treat anxiety, but the drug is only available in 200 mg tablets.

A. How many mg in total are you giving the patient?

B. How many tablets would you give the patient?

Please help. Thank you so much if you can explain everything and show me thoroughly how to do it. I have an exam soon.

The voltage generated by the zinc concentration cell described by,

Zn(s)|Zn2 (aq, 0.100 M)||Zn2 (aq, ? M)|Zn(s)

is 18.0 mV at 25 °C. Calculate the concentration of the Zn2 (aq) ion at the cathode

If you can answer thank you because I can not get it.

I need the order of these molecules from most polar to least polar.

Water

Methanol

Ethanol

1-propanol

2-propanol

1-butanol

Acetone

Which are...

Hydrogen Bonding, dipole-dipole, and dispersion

dipole-dipole and dispersion only

Dispersion only

the choices are...

CH4, HF, CH3Cl, and CO

Consider a process in which an ideal gas is compressed to one-half of its original volume at constant temperature. Calculate the entropy change per mole of gas.

Calculate the entropy change per mole of gas.

delta S= ________ J/ (mol x K)

I have absolutely no idea how to do this problem, and I am so stuck. I would ask my teacher but he does not answer emails nor do I have class the rest of the week. Please help.

For each pair, predict which molecule has the greater molar entropy under the same conditions (assume gaseous species):

From Highest S to lowest S.

Ne(g) , F2 (g), & HF(g)

I had put F2, Ne, and then HF because f2 has the most valence electrons and so on, but i got it totally wrong, so im not sure what the answer is.

I need help with these questions for chemistry. I keep getting them wrong and I don't know why...

1.) 6.201 cm + 7.4 cm + 0.68 cm + 12.0 cm=

2.) 1.6 km + 1.62 m + 1200 cm =

3.) 8.264 g - 7.8 g =

4.) 10.4168 m - 6.0 m =

5.) 12.00 m + 15.001 kg =

6.) 1.31 cm x 2.3 cm =

7.) 5.7621 m x 6.201 m =

8.) 2.02 cm / 7.41 s =

Thank you

Given Newton’s First Law of Motion, what do we reasonably expect an object to do given the following scenarios?

Part (d) An object spins in place with no unbalanced forces or torques acting upon it, what do we expect this object to do?

The object’s spin will slow and eventually reverse direction.

None of these answers.

The object will begin to roll.

The object will continue spinning as it has been.

The object will spin faster and faster.

The object will slowly stop spinning.

Given Newton’s First Law of Motion, what do we reasonably expect an object to do given the following scenarios?

Part (a) An object sits at rest with no unbalanced forces or torques acting upon it. What do we expect this object to do?

The object begins to rotate with a constant angular velocity.

None of these answers.

The object will begin to rotate at an accelerating angular velocity.

The object will remain at rest.

The object will begin to move at a constant velocity.

The object will begin to move at an accelerating velocity .

Part (b) An object is traveling with a constant velocity with no unbalanced forces or torques acting upon it. What do we expect this object to do?

The object will begin to spin as it slows down.

None of these answers.

The object will remain at the same speed but change direction.

The object will remain at the same speed, traveling in the same direction.

The object will slow down and eventually come to rest.

The object will speed up.

Part (c) An object sits at rest with an unbalanced force acting upon it. What should we not expect this object to do? Asking another way, which of the following choices could not be an outcome?

The object will begin to move with an accelerating velocity.

None of these answers.

The object will begin to move with a constant velocity and spin.

The object will remain at rest.

The object will begin to spin.

The object will begin to move with a cons