Hey, need answers to the following physics questions 7. A tiny ball (mass = 0.079 kg)...

Hey, need answers to the following physics questions

7. A tiny ball (mass = 0.079 kg) carries a charge of -17.9 µC. What electric field (magnitude and direction) is needed to cause the ball to float above the ground??

8. A small object has a mass of 3.1 10^-3 kg and a charge of -32 µC. It is placed at a certain spot where there is an electric field. When released, the object experiences an acceleration of 2.31 10³ m/s² in the direction of the +x axis. Determine the magnitude and direction of the electric field.

9. Four point charges have the same magnitude of 2.32 10^-12 C and are fixed to the corners of a square that is 4.10 cm on a side. Three of the charges are positive and one is negative. Determine the magnitude of the net electric field that exists at the center of the square.

10. A long, thin rod (length = 3.8 m) lies along the x axis, with its midpoint at the origin. In a vacuum, a +7.3 µC point charge is fixed to one end of the rod, and a -7.3 µC point charge is fixed to the other end. Everywhere in the x, y plane there is a constant external electric field (magnitude = 5.45 10³ N/C) that is perpendicular to the rod. With respect to the z axis, find the magnitude of the net torque applied to the rod.

Expert Solution

if any doubt arises , mention in comment box i will try my best to solve your doubts

genius_generous answered 1 month ago

7. Ball X of mass 1.0 kg and ball Y of mass 0.5kg travel toward each...

7. Ball X of mass 1.0 kg and ball Y of mass 0.5kg travel toward each other on a horizontal surface. Both balls travel with a constant speed of 5 m/s until they collide. During the collision, ball Y exerts an average force with a magnitude of 40N for 1/6s on ball X . Which of the following best predicts ball momentum after the collision? A Ball Y will travel at a speed less than 5 m/s in the same...

home / study / science / physics / physics questions and answers / this is my...

home / study / science / physics / physics questions and answers / this is my second time posting this: question: i have been working on this and i have done ... Question: This is my second time posting this: Question: I have been working on this and I have... This is my second time posting this: Question: I have been working on this and I have done it. But I am not sure what velocity versus time plot,... I...

A ball of mass m1 =5.2 kg and a block of mass m2 =2.0 kg are...

A ball of mass m1 =5.2 kg and a block of mass m2 =2.0 kg are connected with a lightweight string over a pulley with moment of inertia I and radius R=0.25m. The coefficient of kinetic friction between the table top and the block of mass m2 is μk = 0.4. If the magnitude of the acceleration is a=2.7 m/s2. torque_rotational a)What are the tensions T1 and T2 in the string. T1= N T2= N b)Calculate the moment of inertia...

Ball Collision. A ball with a mass of 0.600 kg is initially at rest. It is...

Ball Collision. A ball with a mass of 0.600 kg is initially at rest. It is struck by a second ball having a mass of 0.400 kg, initially moving with a velocity of 0.250 m/s toward the right along the x-axis. After the collision, the 0.400 kg ball has a velocity of 0.200 m/s at an angle of 36.9° above the x axis in the first quadrant. Both balls move on a frictionless, horizontal surface. Find the magnitude of the...

Please can someone double-check my answers? 1) A ball with a mass of 0.15 kg has...

Please can someone double-check my answers? 1) A ball with a mass of 0.15 kg has a velocity of 5m/s. It strikes a wall perpendicularly and bounces off straight back with a velocity of 3 m/s. The ball underwent a change in momentum of? 1.20 kg*m/s 2) What braking force is supplied to a 3,000 kg car traveling with a velocity of 35 m/s that is stopped in 12 seconds? F=8750 N 3) A 0.1 kg baseball is thrown with...

A billiard ball of mass 0.28 kg hits a second, identical ball at a speed of...

A billiard ball of mass 0.28 kg hits a second, identical ball at a speed of 7.2 m/s and comes to rest as the second ball flies off. The collision takes 250 μs. a. What is the average force on the first ball? Express your answer with the appropriate units. Enter positive value if the force is along the first ball's initial speed and negative value if the force is opposite to the first ball's initial speed. b. What is...

A ball of mass 0.5 kg makes a head-on elastic collision with a second ball (at...

A ball of mass 0.5 kg makes a head-on elastic collision with a second ball (at rest) and rebounds with a speed equal to 0.450 its original speed. The mass of the second ball in kg

A ball with a mass of 0.615 kg is initially at rest. It is struck by...

A ball with a mass of 0.615 kg is initially at rest. It is struck by a second ball having a mass of 0.380 kg , initially moving with a velocity of 0.260 m/s toward the right along the x axis. After the collision, the 0.380 kg ball has a velocity of 0.230 m/s at an angle of 37.4 ∘ above the x axis in the first quadrant. Both balls move on a frictionless, horizontal surface. What is the magnitude...

Students need to answer case study questions and two following tutorial questions. Answers need to present...

Students need to answer case study questions and two following tutorial questions. Answers need to present in the point form, include 100 to 200 words for each question. What are the key characteristics of a digital business strategy model? Evaluate the range of restructuring options for an existing ‘bricks-and-mortar’ organization to move to ‘bricks-and-clicks’ or ‘clicks-only’ contributing a higher online revenue.

A pendulum consists of a ball of mass 3.0 kg on a string of length 4.0...

A pendulum consists of a ball of mass 3.0 kg on a string of length 4.0 m. The ball is pulled back untilits center has risen to a height of 0.80 m. The ball is released such that it strikes a 1.0 kg block at thebottom of its swing. The block comes to a rest after traveling 2.0 m across a surface withμk= 0.15.What is the speed of the ball right after the collision? Is the collision elastic?

Question