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What are the magnitude and direction of the electric field that will balance the gravitational force on the particle? Please include any formulas needed and an explanation of all variables.
Suppose the ball on point A is released at time 0. (Point A is on top with a declining slope at a 45 degree angle to Point B (ground). How long will it take for the ball to roll down 5m on the surfa
A grinding wheel accelerates uniformly from rest to 3450 rpm in5 s. a. What is its angular acceleration in rad/s2?
What is the maximum mass that can hang without sinking from a 90cm diameter Styrofoam sphere in water? Assume the volume of the mass is negligible compared to that of the sphere.
1) The truck accelerates from rest to vf = 19.0 m/s in t = 16.0 s (which is slow enough that the box will not slide). What is the acceleration of the box? a2) In the previous situation, what is the
An unstable particle of mass M decays into two identical particles each of mass m. Obtain an expression for the velocities of the two decay particles in the lab frame (a) if M is at rest in the lab
What is the heading of the plane with respect to the ground? (let 0 degree represent due north, 90 degree represents due east) How far east will the plane travel in 1 hour?
A researcher measures the concentration of Advil in a patient's bloodstream as a function of time, making measurements every hour.
In the previous situation, what is the frictional force the lower crate exerts on the upper crate?
A +75 µC charge is placed 46 cm from an identical +75 µC charge. How much work would be required to move a +0.72 µC test charge from a point midway between them to a point 5 cm clo
A copper bar 2.5 m long has a circular cross section of radius 2 cm. One end is kept at 80 oC and the other end is kept at 0 oC. The surface of the bar is insulated so that there is negligible heat
A capacitor is consists of two short sections of parallel wires in air. One wire is found to be of the voltage of 48 V and the other -48. They carry equal and opposite charge of magnitude 65 pC. Wha
Landing on the Moon, a spacecraft fires its rockets and comes to a complete stop just 16 meters above the lunar surface. (A) How long does it take to fall? (B) What is its impact speed?
Differentiate the position vector twice with respect to time to find the acceleration, and find its magnitude.
By how much does the ball clear or fall short of clearing the crossbar of the goalpost if that bar is 3.05 m high? (b) What is the vertical velocity of the ball at the time it reaches the goalpost?
A 14.0 gauge silver wire of diameter 1.628 carries a current of 13.0 . What is the potential difference across a 2.05 length of the wire?
Describe qualitatively what happens to the magnitude of the acceleration as the ball falls... does the acceleration increase, decrease, remain the same, decrease then increase, etc.? Please explain
If the battery is disconnected and then the plates are pulled apart to a separation of 1.40 , what is the capacitance (C), charge (Q), electric field between plates (E), and energy stored in the cap
What is the power dissipated in the heating element when the current reaches a steady value? What is the power dissipated in the heating element initially?
An object is moving in the -direction at 1.4 m/s when it undergoes an acceleration . a = 0.52j m/s^2 Find its velocity vector after 4.8. Express your answer as a comma-separated pair of components.
Two divers jump from a 5- platform. One jumps upward at 1.50 , and the second steps off the platform as the first passes it on the way down. Part A: What is the first diver's speed as he hits the wa
What are the strength and direction of the electric field at points 4, 8, and 12 cm from the center?
The dry weight of a man is 845 N. When he is submerged underwater, the reading on the scale is only 43.2 N. (a) What is the volume of the man?
The surface charge density on the inside surface is -300nC/m2. The surface charge density on the exterior surface is +300 nC/m2. What are the strength and direction of the electric field at points 4,