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Physics

02/01/23

Can you clear my misconception?

In Doppler Effect, I have a misconception regarding one thing which I have mentioned below:Suppose there are two balls of unequal sizes placed touching each other, the bigger one on the left and... more

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Physics Calculus

02/01/23

Compute the work (in joules) required to compress a spring 9 cm more when it is already compressed 5 cm, assuming that the spring constant is 𝑘=140 N/m.

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Physics Calculus

02/01/23

Compute the work required to stretch a spring from 9 to 13 cm past equilibrium, assuming that the spring constant is 𝑘=140 kg/s2.

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Physics

02/01/23

The electric charge of some dust particle is q = 4.5 nC. What is the net electric flux from this particle?

The electric charge of some dust particle is q = 4.5 nC. What is the net electric flux from this particle?𝜑E = q enc / Eo= (4.5e-06C)/(8.85e-12 Nm^2/C^2)= 5.084e5 Nm^2/C which is incorrect. I am... more

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Physics

01/31/23

Finding resultant direction

An airplane is traveling 583 m/s at 68.1° degrees north of west when a wind starts to blow. The velocity of the wind is 110 m/s and it is blowing toward 19.0° east of north. What is the resultant... more

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Physics Chemistry

01/31/23

Physical Chemistry

Hello,Do you know what textbook I can find the formulas for the affect a competitor in solution has on the dissociation constant of two molecules with each other?How would I find the relationship... more

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Physics

01/31/23

A roundish object is rolling along the ground with 13.1 J of rotational KE. If its angular speed is 8.33 rad/s, what is its moment of inertia?

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Physics

01/31/23

A bike with tires of radius 0.330 m speeds up from rest to 5.33 m/s in 6.27 s. Through what angle do the wheels turn in that time?

Hint: Remember to first convert linear velocity (v) to angular velocity (w). (Unit = rad)

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Physics

01/30/23

Exploring cost of transport

Potentially useful information:1 mile = 1609m1 gram of H2O = 1 ml H2OEnergy content of fat is 39.3 kJ/gram and 2.0 L of O2 is consumed per gram of fat metabolizedKinetic energy = ½ mv2, work = F X... more

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Physics

01/30/23

RCL Circuit analysis

Figure 4: Representative circuit of an electric guitar's pickup.Consider a familiar electric guitar or bass. Below each string, there is a permanent magnet (sometimes two) called pole pickups. The... more

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Physics

01/30/23

A billiard ball traveling at 12 m/s has an elastic head-on collision with a billiard ball of equal mass that is initially at rest. The first ball is at rest after the collision.

What is the speed of the second ball after the collision?

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Physics

01/30/23

A 65.0 kg ice skater moving forward with a velocity of 1.40 m/s throws a 0.280 kg snowball forward with a velocity of 38.0 m/s.

(a) What is the velocity of the ice skater after throwing the snowball? Disregard the friction between the skates and the ice.(b) A second skater initially at rest with a mass of 60.0 kg catches... more

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Physics

01/30/23

A 96 kg fullback moving east with a speed of 9.0 m/s is tackled by a 101 kg opponent running west at 3.0 m/s, and the collision is perfectly inelastic.

(a) Calculate the velocity of the players just after the tackle.(b) Calculate the decrease in kinetic energy during the collision

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Physics

01/30/23

A 1.30 kg skateboard is coasting along the pavement at a speed of 8.0 m/s when a 0.950 kg cat drops from a tree vertically downward onto the skateboard.

What is the speed of the skateboard-cat combination.

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Physics

01/30/23

An airplane is traveling 894 km/hr in a direction 85 degrees West of North. Find the Westward component vectors of the airplane's velocity.

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Physics

01/30/23

A dust particle of mass 4.1 mg and charge +2.5 pC is released form rest 12 cm

A dust particle of mass 4.1 mg and charge +2.5 pC is released form rest 12 cm from a fixed charge of 4.2 mC. What will the dust particle's initial acceleration be when released?

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Physics

01/30/23

A kid pushes a stationary merry-go-round, creating an acceleration of 0.135 rad/s^2. How much time does it take the merry-go-round to complete 2.00 rotations?

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Physics

01/30/23

How to find the components, magnitude, and direction of velocity?

A dog running in an open field has velocity components of vx= 2.0 m/s and vy = -1.8 m/s at time t1=12.0s. For the time interval t1 = 12.0 s to t2 = 23.0 s, the average acceleration of the dog has... more

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Physics

01/30/23

A ball thrown vertically upward reaches a maximum height of 30 m above the surface of the earth. What is the velocity of the ball at its maximum height, in meters per second?

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Physics

01/29/23

Kinematics exercise got the best of me.

The position of a particle moving along the x axis varies in time according to the expression x = 3t^2 , where x is in meters and t is in seconds. Evaluate its position(a) at t = 3.00 s(b) at 3.00... more

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Physics

01/28/23

Projectile motion (Baseball Field)

A baseball is thrown from the outfield to home plate. Let's say the outfielder and catcher are 71.6m horizontally apart, and the ball leaves the outfielders hand at a height of 2.28m. (Assume no... more

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Physics

01/28/23

What is the magnitude of the force between an ion of charge 5e and an ion of charge -1e if their separation is 0.62 nm?

What is the magnitude of the force between an ion of charge 5e and an ion of charge -1e if their separation is 0.62 nm?F magnitude = ???Is this force attractive or repulsive? I got -1.17e+29 N as... more

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Physics

01/28/23

Two equal charges, of charge q each, experience a repulsive force of 4.3 N when separated by 15 cm. If q is positive, what is its value?

Two equal charges, of charge q each, experience a repulsive force of 4.3 N when separated by 15 cm. If q is positive, what is its value?q = ___ 𝜇CI get 9.30e+10 C which is obviously not correct... more

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Physics

01/28/23

Projectile Motion

Dara and Cameron are studying projectile motion in their physics lab class. They set up a Pasco projectile launcher on the edge of their lab table, so that the ball will be launched at an initial... more

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Physics

01/27/23

An airplane flying North at 98.7 m/s encounters a 47.5 m/s headwind. What is the airplane’s speed relative to the ground?

Physics problem

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Can you clear my misconception?

Compute the work (in joules) required to compress a spring 9 cm more when it is already compressed 5 cm, assuming that the spring constant is 𝑘=140 N/m.

Compute the work required to stretch a spring from 9 to 13 cm past equilibrium, assuming that the spring constant is 𝑘=140 kg/s2.

The electric charge of some dust particle is q = 4.5 nC. What is the net electric flux from this particle?

Finding resultant direction

Physical Chemistry

A roundish object is rolling along the ground with 13.1 J of rotational KE. If its angular speed is 8.33 rad/s, what is its moment of inertia?

A bike with tires of radius 0.330 m speeds up from rest to 5.33 m/s in 6.27 s. Through what angle do the wheels turn in that time?

Exploring cost of transport

RCL Circuit analysis

A billiard ball traveling at 12 m/s has an elastic head-on collision with a billiard ball of equal mass that is initially at rest. The first ball is at rest after the collision.

A 65.0 kg ice skater moving forward with a velocity of 1.40 m/s throws a 0.280 kg snowball forward with a velocity of 38.0 m/s.

A 96 kg fullback moving east with a speed of 9.0 m/s is tackled by a 101 kg opponent running west at 3.0 m/s, and the collision is perfectly inelastic.

A 1.30 kg skateboard is coasting along the pavement at a speed of 8.0 m/s when a 0.950 kg cat drops from a tree vertically downward onto the skateboard.

An airplane is traveling 894 km/hr in a direction 85 degrees West of North. Find the Westward component vectors of the airplane's velocity.

A dust particle of mass 4.1 mg and charge +2.5 pC is released form rest 12 cm

A kid pushes a stationary merry-go-round, creating an acceleration of 0.135 rad/s^2. How much time does it take the merry-go-round to complete 2.00 rotations?

How to find the components, magnitude, and direction of velocity?

A ball thrown vertically upward reaches a maximum height of 30 m above the surface of the earth. What is the velocity of the ball at its maximum height, in meters per second?

Kinematics exercise got the best of me.

Projectile motion (Baseball Field)

What is the magnitude of the force between an ion of charge 5e and an ion of charge -1e if their separation is 0.62 nm?

Two equal charges, of charge q each, experience a repulsive force of 4.3 N when separated by 15 cm. If q is positive, what is its value?

Projectile Motion

An airplane flying North at 98.7 m/s encounters a 47.5 m/s headwind. What is the airplane’s speed relative to the ground?

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