Exam 1: A: Foundations

An object 1.80 cm tall is placed 100 cm in front of a diverging lens having a focal length of magnitude 25 cm.A converging lens with a focal length of magnitude 33.33 cm is placed 30 cm past the first lens.What is the lateral magnification of this system of lenses?

Vector = 1.00 + -2.00 And vector = 3)00 + 4)00 ) What are the magnitude and direction of vector = + ?

A transverse wave traveling along a string transports energy at a rate r.If we want to double this rate,we could

An oil layer that is 5.0 cm thick is spread smoothly and evenly over the surface of water on a windless day.What is the angle of refraction in the water for a ray of light that has an angle of incidence of 45° as it enters the oil from the air above? (The index of refraction for the oil is 1.15,and for water it is 1.33.)

When a solid melts

A stock person at the local grocery store has a job consisting of the following five segments: (1)picking up boxes of tomatoes from the stockroom floor (2)accelerating to a comfortable speed (3)carrying the boxes to the tomato display at constant speed (4)decelerating to a stop (5)lowering the boxes slowly to the floor. During which of the five segments of the job does the stock person do positive work on the boxes?

A series of weights connected by very light cords are given an upward acceleration of 4.00 m/s² by a pull P,as shown in the figure.A,B,and C are the tensions in the connecting cords.The SMALLEST of the three tensions,A,B,and C,is closest to

If we double the root-mean-square speed (thermal speed)of the molecules of a gas,then

The temperature inside a Carnot refrigerator placed in a kitchen at 22.0°C is 2.0°C.The heat extracted from the refrigerator is 89 MJ/h.What power is needed to operate this refrigerator?

A tiny object carrying a charge of +3.00 μC and a second tiny charged object are initially very far apart.If it takes of work to bring them to a final configuration in which the +3.00 μC object i is at X = 1.00 mm,y = 1.00 mm,and the other charged object is at x = 1.00 mm,y = 3.00 mm,find the magnitude of the charge on the second object.(k = 1/4πε₀ = 8.99 × 10⁹ N • m²/C²)

How far are you from your image when you stand 0.750 m in front of a vertical plane mirror?

An object of mass 6.8 kg is attached to an ideal massless spring of spring constant 1690 N/m.The object is Calculate the maximum speed the object reaches during its motion.

How much energy is needed to change the speed of a 1600 kg sport utility vehicle from 15.0 m/s to 40.0 m/s?

A negatively charged particle is moving to the right,directly above a wire having a current flowing to the right,as shown in the figure.In which direction is the magnetic force exerted on the particle?

An electron moves with a constant horizontal velocity of 3.0 × 10⁶ m/s,and no initial vertical velocity as it enters a deflector inside a TV tube.The electron strikes the screen after traveling 17.0 cm.horizontally and 40.0 cm vertically upward with no horizontal acceleration.What is the constant vertical acceleration provided by the deflector? (The effects of gravity can be ignored.)

What characteristic of sound determines the "pitch" of a musical note?

A satellite in a circular orbit of radius R around planet X has an orbital period T.If Planet X had one-fourth as much mass,the orbital period of this satellite in an orbit of the same radius would be

A convex spherical mirror with a radius of 50 cm has a 4.0 cm tall object placed 100 cm in front of it.What is the position of the image relative to the mirror?

In the figure,a ring 0.71 m in radius carries a charge of + 580 nC uniformly distributed over it.A point charge Q is placed at the center of the ring.The electric field is equal to zero at field point P,which is on the axis of the ring,and 0.73 m from its center.(ε₀ = 8.85 × 10^-12 C²/N • m²)The point charge Q is closest to

When electric current is flowing in a metal,the electrons are moving