Get college assignment help at Smashing Essays Two stars appear equally bright on a photograph, but spectra show that one is an M main-sequence star and the other is an M giant star. Which one is the most distant

## A rocket of mass 4.5 *10^5 kg is in flight. Its

A rocket of mass 4.5 *10^5 kg is in flight. Its thrust is directed at an angle of 65.0° above the horizontal and has a magnitude of 7.80 *10^6 N. Find the magnitude and direction of the rockets acceleration. Give the direction as an angle above the horizonal.

## Two horizontal forces, 215 N and 133 N, are exerted on

Two horizontal forces, 215 N and 133 N, are exerted on a canoe. If the these forces are applied in the same directions, find the net horizontal force on the crate

## The bullet becomes lodged in the block, and the two slide

The bullet becomes lodged in the block, and the two slide together on the floor for a distance of 1.2 m before coming to rest (see figure below). If the coefficient of friction between the block and the floor is 0.40, what is the mass of the block?

## Lillian (mass 30.0 kg) standing on slippery ice catches her leaping

Lillian (mass 30.0 kg) standing on slippery ice catches her leaping dog (mass 15 kg) moving horizontally at 5.0 m/s. What is the speed of Lillian and her dog after the catch?

## Use conservation of energy to determine the angular speed of the

Use conservation of energy to determine the angular speed of the spool. After the 3.00 bucket has fallen 3.6 meters, starting from rest. The light sting attached to the bucket is wrapped around the spool and does not slip as it unwinds. The mass of the spool is 5.00kg, the radius of the spool is 0.600 meters, and the mass of the bucket is 3.00 kg. (Answer in rad/s)

## A 1300- car rolling on a horizontal surface has speed v

A 1300- car rolling on a horizontal surface has speed v = 55 when it strikes a horizontal coiled spring and is brought to rest in a distance of 2.4 .What is the spring stiffness constant of the spring?

## when two identical ions are separated by a distance of 6.34E-10m,

when two identical ions are separated by a distance of 6.34E-10m, the electrostatic force each exerts on the other is 5.15E-9 N. How many electrons are missing from each ion?

## the electric field at the point x=4.86 cm and y=0 points

the electric field at the point x=4.86 cm and y=0 points in the positive x direction with a magnitude of 10.0 N/C. at the point x=11.2 cm and y=0 the electric field points in the positive x direction with a magnitude of 14.2 N/C. Assuming this electric field is produced by a single, point charge, A) calculate its location B)calculate its charge

## The cell membrane in a nerve cell has a thickness of

The cell membrane in a nerve cell has a thickness of 0.104 um. Approximating the cell membrane as a parallel-plate capacitator with a surface charge density of 5.71 E-6 C/m^2, calculate the electric field within the membrane. B) Calculate the electric field within the membrane, if the thickness of the membrane were quadrupled.

## A cart of mass M = 2.00 kg can roll without

Get college assignment help at Smashing Essays A cart of mass M = 2.00 kg can roll without friction on a level track. A light string draped over a light, frictionless pulley connects the cart to a hanger with mass m = 0.50 kg. The cart is released from rest, allowing it to roll, pulled by the falling hanger.

## A student sits on a rotating stool holding two 4.0kg objects.

A student sits on a rotating stool holding two 4.0kg objects. When his arms are extended horizontally, the objects are 1.0 meters from the axis of rotation, and he rotates with an angular speed of 0.75 rad/s. The moment of inertia of the student plus stool is 3.0kgm^2 and is assumed to be constant. The student then pulls the object horizontally to 0.50 meters from the rotation axis. a) Find the new angular speed of the student (answer in rad/s) b) Find the kinetic energy of the students system before and after the objects are pulled in before(answer in J) after (answer in J)

## The pulley of an ideal Atwood’s machine is given an upward

The pulley of an ideal Atwood’s machine is given an upward acceleration a, as shown below. Find the acceleration of each mass and the tension in the string that connects them. The speeds of the two blocks are not equal in this situation. (Use the following as necessary: a, m1, m2, and g for the acceleration due to gravity.)

## Two long, parallel wires hang by 4.00-cm-long cords from a common

Two long, parallel wires hang by 4.00-cm-long cords from a common axis (see the figure attached). The wires have a mass per unit length of 1.10×10^(−2) kg/m and carry the same current in opposite directions. What is the current in each wire if the cords hang at an angle of 6 degree with the vertical?

## Two long, straight, parallel wires, 10.0 cm apart carry equal 4.00-A

Two long, straight, parallel wires, 10.0 cm apart carry equal 4.00-A currents in the same direction, as shown in the figure attached. Find the following: (a)-The magnitude of the magnetic field at point P_2, 25.0 cm to the right of P_1. and what is its direction (to the right, upward, no field)? (b)-The magnitude of the magnetic field at point P_3, 20.0 cm to the right of P_1. and what is its direction (to the left, to the right, upward, downward, no field)?

## A curve with a 125 m radius on a level road

A curve with a 125 m radius on a level road is banked at the correct angle for a speed of 20 {rm m/s}.If an automobile rounds this curve at 30 {rm m/s}, what is the minimum coefficient of static friction between tires and road needed to prevent skidding?

## A bungee jumper with mass 68.0 jumps from a high bridge.

A bungee jumper with mass 68.0 jumps from a high bridge. After reaching his lowest point, he oscillates up and down, hitting a low point eight more times in 49.0 . He finally comes to rest 23.0 below the level of the bridge.

## An 85 g arrow is fired from a bow whose string

An 85 g arrow is fired from a bow whose string exerts an average force of 95 N on the arrow over a distance of 79 cm. What is the speed of the arrow as it leaves the bow?

## The freshness of fish can be measured by placing a fish

The freshness of fish can be measured by placing a fish between the plates of a capacitor and measuring the capacitance. How does this work? (Hint: As time passes, the fish dries out)

## An arrow is fired with a speed of 21.0 at a

An arrow is fired with a speed of 21.0 at a block of Styrofoam resting on a smooth surface. The arrow penetrates a certain distance into the block before coming to rest relative to it. During this process the arrow’s deceleration has a magnitude of 1600 and the block’s acceleration has a magnitude of 450 . How long does it take for the arrow to stop moving with respect to the block?

## while john is traveling along an interstate highway, he notices a

while john is traveling along an interstate highway, he notices a 160-mile marker as he passes through town. later john passes another mile marker, 115. a. what is the distance between town and john’s current location? b.what is john’s current location?