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Assume this current to flow in the same direction in two neurons, which are parallel over 1.0 cm and separated by 0.70mm . What is the force between the two neurons? Is it an attractive or repulsiv
The potential energy at x = 8 m is -2000 V and at x = 2 m is +400 V. What is the magnitude and direction of the electric field?
If you pressurize the gas at a constant temperature, how much work must be done on the gas? Give you answer in Joules to four significant digits.
What is the change in temperature of the gas due to the removal of the energy? Give your answer in Kelvin to three significant digits. Do not include the units in your answer.
A flywheel having constant angular acceleration requires 5.00s to rotate through 165rad . Its angular velocity at the end of this time is 110 . Find the angular velocity at the beginning of the 5.00
A spacecraft is in orbit around a planet. The radius of the orbit is 3.1 times the radius of the planet (which is R = 71455 km). The gravitational field at the surface of the planet is 22 N/kg. Wha
A single resistor is connected across the terminals of a battery. Which one or more of the following changes in voltage and current leaves unchanged the electric power dissipated in the resistor?
A 15.0-m length of wire consists of 9.0m of copper followed by 6.0m of aluminum, both of diameter 1.5mm . A voltage difference of 85mV is placed across the composite wire. A.) What is the total resi
An electron is released from rest at the point midway between the two charges, and it moves along the line connecting the two charges. What is the speed of the electron when it is 10.0cm from charge
After leaving the end of a ski ramp, a ski jumper lands downhill at a point that is displaced 60.4 m horizontally from the end of the ramp. His velocity, just before landing, is 25.2 m/s and points
A soccer player kicks the ball toward a goal that is 11.0 m in front of him. The ball leaves his foot at a speed of 17.4 m/s and an angle of 39.0 ° above the ground. Find the speed of the ball w
It rises to its maximum height and then falls down to the green. Ignoring air resistance, find the speed of the ball just before it lands? Please show your work.
An RC circuit is connected across a DC voltage source through an open switch. The switch is closed at t=0s. Which of the following is correct statement regarding this circuit?
An 80 mm segment of wire is at an angle of 53 degrees south of a westward, 2.3-T B field. What is the magnitude of the current in this wire if it experiences a force of 2 N directed out of the paper
A 3.00 kg mass is attached to this spring and released from rest after stretching the spring 2.00 m. What is the speed of the mass when the spring returns to its equilibrium length?
A 1.00-kg mass is attached to a spring hanging vertically and hangs at rest in the equilibrium position. The spring constant of the spring is 1.00 N/cm.
The magnitude of the drag force on a 20.0-kg object is proportional to its speed. The object has a terminal velocity 80 m/s. What is the magnitude of the drag force on the object when it is falling
A constant force of 20 N is applied to an object of mass 8.0 kg at an angle of 25° with the horizontal. What is the work done by this force on the object if it causes a displacement of 2.0 m al
An object is acted on by a drag force with a magnitude that is proportional to the speed. The object accelerates downward at 3.00 m/s2 when it is falling with a speed 20.0 m/s. What is the terminal
A 1000-kg car is picking up speed as it goes around a horizontal curve whose radius is 100 m. The coefficient of static friction between the tires and the road is 0.350. At what speed will the car b
A car travels around 200 m radius flat curve at 40 m/s at constant speed. What is the minimum static coefficient of friction which allows it to travel at this speed without sliding?
A 2-kg ball is moving with a constant speed of 5 m/s in a horizontal circle whose radius is 50 cm. What is the acceleration of the ball?
A box is sliding down an incline tilted at an angle 14.0° above horizontal. The box is sliding down the incline at a speed of 1.70 m/s. The coefficient of kinetic friction between the box and th
A 55.0-kg box rests on a horizontal surface. The coefficient of static friction between the box and the surface is 0.300. What horizontal force must be applied to the box for it to start sliding alo