# Math/Physics

208,687 results, page 70

### Physics Help

Charge Q is uniformly distributed around the perimeter of a semicircle of radius R. What is the electric field at the circle's center?

### Physics

A man carries a 10 kg sack of groceries in his arms with a force of 50 N as he walks forward a distance of 10 m. How much work has he done?

### physics

If the 60-kg player is running forward at 7.0m/s when she makes contact with the dummy, what is the players velocity at the end of the 1.20s impact?

### physics

a particle completes 4 revolution/sec on a circular path of radius 0.25m.calculate angular velocity

### Physics

A block weighing 5.7 N requires a force of 2 N to push it along at constant velocity. What is the coefficient of friction for the surface?

### Physics

A block weighing 5.7 N requires a force of 2 N to push it along at constant velocity. What is the coefficient of friction for the surface?

### Physics

True or False. When non-conservative forces are present, the amount of work done increases with the length of the path.

### PHYSICS

A stone propelled from a catapult with a speed of 50m/s attains a height of 100m.Calculate:(a)the time of flight?

### physics

Three resistors, 1.17, 2.84, and 3.65Ω, are connected in series across a 20.3-V battery. Find the power delivered to each resistor.

### physics

Three resistors, 1.17, 2.84, and 3.65Ω, are connected in series across a 20.3-V battery. Find the power delivered to each resistor.

### physics

let p and E denote the linear momentum and energy of emitted photon respectively if the wavelength of incident radiation is increased----

### physics

A car with a weight of 5000.0 N is accelerated across a level surface at 2.5 m/s^2. What is the net force acts on the wagon? (g= 9.81 m/s^2)

### Physics 11

If two objects weighing 5 kg and 7 kg are dropped from a height of 64 m and 36 m, respectively. What will be the ratio of times taken to reach the ground? Thanks.

### physics

If You do 100 j of work to elevate a bucket of water,what is its gravitational potential energy relative to its starting position?

### physics

Calculate the effective value of g, the acceleration of gravity (in meters/second^2), at 5100 km above the earth's surface.

### Physics

An object is dropped from rest. What is its instantaneous speed when it has been in motion for 7 s? The acceleration of gravity is 9.8 m/s 2 . Answer in units of m/s

### Physics

What happens to the vibrating length of a resonance tube if a loud speaker is brought close to a displacement node?

### Physics

Find the frequency of a sound wave moving in air at room temperature (20.0) with a wavelength of 0.667 m. Is the formula F=1/T?

### Physics

The electric field lines surrounding three charges are shown in the figure below. The center charge is q2 = -15.9 µC.

### physics

a toy moves on a horizontal surface with a speed of 3m/s.it makes 8 turns in 5 seconds,whats the diameter of the wheel?

### physics

Just wanted to say a quick thanks to Steve and Damon, figured it all out, thanks guys, awsome!!!

### physics

If only conservative forces are acting, total mechanical energy (KE + PE) is not necessarily conserved. True or False?

### physics

32 kg child practicing rock climbing, she feel but the rope hung on with a tension of 253N. find acceleration??

### physics

A 0.49 cm high object is placed 8.5 cm in front of a diverging lens whose focal length is -7.5 cm. What is the height of the image?

### Physics

Neglecting air resistance, how high could a 0.15kg baseball be thrown if it is throw straight up at a speed of 25m/s?

### college physics

How many seconds would it take a 7.00hp motor to raise a 475 lb boiler to a platform 38.0 ft high?

### Physics

Show that 480 W of power is expended by a weightlifter when lifting a 60-kg barbell a vertical distance of 1.2 m in a time interval of 1.5 s.

### physics

what pressure (in atm) would be exerted by 76g of fluorine gas in a 1.5 litre vessel at -37 degrees Celsius?

### Physics

Two identical positive charges exert a repulsive force of 7.0 10-9 N when separated by a distance of 3.2 10-10 m. Calculate the charge of each. _C

### physics

A body of 150kg is located at a height of 45m. If allowed to fall freely to the ground. What will be its velocity on impact?

### Physics help!

The range of human hearing extends from approximately 20 Hz to 20,000 Hz. Find the wavelengths of these extremes at a temperature of 2°C. 20 Hz? 20000 Hz?

### physics

TWO METALLIC WIRES AB ARE CONNECTED IN PARALLEL A ASS LENGTH L & RADIUS R V AS LENGHT 2L AND 2R FIND RESISTANCE

### physics

A football is kicked with a velocity of 31 m/s at an angle of 41. What is the ball's acceleration in the vertical direction as it flies through the air?

### physics

Vector A has magnitude 73 units and direction, counterclockwise from east, of 5.5 degrees. What is the value of its x-component to 1 decimal place?

### physics

A plane travelling at 15.2 m/s is brought to rest in a distance of 132 meters. To the nearest hundredth of a m/s2 what is the magnitude of its acceleration?

### physics

an elevator weighing400kg is to be lifted up at a constant velocity of 3cms-1 what would be the minimum power of motor to be used

### physics

The average speed of a bicycle, an athlete and a car are 18 km/hr, 7 m/s and 2 km/min respectively. Which among these is the fastest and the slowest one?

### Physics

An object is thrown directly up (positive direction) with a velocity (vo) of 20.0 m/s and do= 0. Determine how long it takes to get to the maximum height of 24.0 m.

### physics

Two 4.3 kg physical science textbooks on a bookshelf are 0.25 m apart. What is the magnitude of the gravitational attraction between the books

### physics

starting from rest, find a 54.6kg child’s speed at the bottom of a 15.5m tall slide if it is assumed to be frictionless

### Physics

How far will a car travel if it starts from rest and experiences an acceleration of magnitude 3.75m/2^2 forward for 5.65 s? Answer is 59.9m

### Physics

How far will a car travel if it starts from rest and experiences an acceleration of magnitude 3.75m/2^2 forward for 5.65 s? Answer is 59.9m

### physics

If a cyclist traveling at 14.0m/s skids to a stop in 5.60 s, determine the skidding distance assume uniform acceleration? Answer is 39.2m

### physics

A pendulum bob swinging at a velocity of 10 m/sec would rise how high from its lowest point of its swing

### Physics

What is the minimum work in joules needed to push a 1840 kg car 14.0 m up a 12.5 degree incline? (Ignore friction.)

### Physics

At its peak, a tornado is 60.0 m in diameter and carries 500 km/h winds. What is its angular velocity in revolutions per second?

### Physics

What is the final velocity of a hoop that rolls without slipping down a 5.00-m-high hill, starting from rest?

### physics

How many times a minute does a boat bob up and down on ocean waves that have a wavelength of 43.0 m and a propagation speed of 5.25 m/s?

### Physics

Show that 480 W of power is expended by a weightlifter when lifting a 60-kg barbell a vertical distance of 1.2 m in a time interval of 1.5 s.

### physics

A trolley while going down an inclined plane has an acceleration of 2 cm/s2.What will be the velocity 3 secs after its start?

### Physics

When you swim across a river does the time it takes to get to the other side depend on the rate of flow of the water?

### Intro to Physics

With scanning probe microscopy technology, we see not actual atoms but rather images of them. Explain.

### physics

A commuter backs her car out of her garage with an acceleration of 1.6 m/s2. How long does it take her to reach a speed of 2.3 m/s in seconds

### physics

A boy sledding down a hill accelerates at 1.20 m/s2. If he started from rest, in what distance would he reach a speed of 7.00 m/s?

### physics

A boy sledding down a hill accelerates at 1.20 m/s2. If he started from rest, in what distance would he reach a speed of 7.00 m/s?

### Physics

A boy sledding down a hill accelerates at 1.55 m/s2. If he started from rest, in what distance would he reach a speed of 6.90 m/s?

### physics

if a ball is tossed from ground level upward at a speed of 44 m/s how long will it take to reach its maximum height

### physics

A car comes to rest uniform deceleration at the rate of 5.8 m/s2 for 14.3 seconds. What is distance did it travel during this time??

### Physics

It takes you 10min to walk with an average velocity of 1.2m/s to the north from the bus stop to the restaurant entrance. What is your displacement?

### Physics

How long does it take T-Rex to reach its food 200m away assuming that he starts from rest and accelerates at 4.00 m/s2?

### Physics

Show that 480 W of power is expended by a weightlifter when lifting a 60-kg barbell a vertical distance of 1.2 m in a time interval of 1.5 s.

### physics

if you are stuck in the middle of a frictionless frozen lake with only your backpack, how can you get back safely to solid ground?

### physics

if you are stuck in the middle of a frictionless frozen lake with only your backpack, how can you get back safely to solid ground?

### physics

if you are stuck in the middle of a frictionless frozen lake with only your backpack, how can you get back safely to solid ground?

### Physics

Problem 3- If a bug can jump straight up to a height of 0.5 m. a) what is its initial speed as it leaves the ground? b) How long is it in the air?

### physics

A 4.00kg kg bucket of water is accelerated upward by a cord of negligible mass whose breaking strength is 73.0N N .

### physics

Forces of 9.93 N and 1.23 N act at right angles on a reddish-green block of mass 3.02 kg. How much acceleration occurs?

### physics

What maximum height will a 318.3 m driver each if it is launched at an angle of 17.0 tothe ground? The acceleration due to gravityis 9.81 m/s2.

### physics

A flower pot with a mass of 3.8kg is hanging by 2 wires that make an angle of 48° from the horizontal. what is the tension in each wire?

### physics

A flower pot with a mass of 3.8kg is hanging by 2 wires that make an angle of 48° from the horizontal. what is the tension in each wire

### physics

A merry-go-round makes 23 revolutions in a 2.8min ride. Part A What is its average angular speed in rad/s?

### Physics

the 8kg mass of an object moves in a distance of radius 10cm at 15m^2.calculate the angular velocity

### PHYSICS

What's the total mechanical energy of a 300kg satellite in circular orbit 1400km above Earth's surface?

### Physics

How much force is needed to hold a nearly weightless but rigid 1-L carton beneath the surface of water?

### physics

Find the distance by which a 42cm diameter, 9.4m tall concrete column is compressed when it supports a 12900kg load

### physics

if a teacher wanted to demonstrate mass in the classroom, which of the following objects should she use? a ruler or an eraser

### physics URGENT

3. Using conceptual meaning of g = Fg/m [N/kg], answer the following: a) What does the spring scale read on the surface of the Moon?

### Physics

Why do some cooks put ice in the pot to cook meat? Explain then prove your answer by solution.

### Physics

Why is an ice cube at 0°C more effective in cooling soft drink than the same mass of water at0°C?

### Physics

Why do some cooks put ice in the pot to cook meat? Explain then prove your answer by solution?

### Physics

A copper ball 2 cm in radius is heated in a furnace to 400 degree celsius. if its emissivity is 0.3, at what rate does it radiates?

### PHYSICS

Name and discuss the levels of organization in a multicellular organism starting from the basic unit or structure of life.

### physics

A 0.0400 kg ice cube at -30.0°C is placed in 0.400 kg of 35.0°C water in a very well insulated container. What is the final temperature?

### Physics

Consider the static equilibrium diagram below. What is the net force acting along the positive x-axis?

### physics

An 87.0 kg fullback moving east with a speed of 5.0 m/s is tackled by a 83.0 kg opponent running west at 2.92 m/s, and the collision is perfectly inelastic.

### Physics

suppose you have 3 resistors, each of value 0f 30 omega. List all the different resistances that you can obtain by combining them

### Physics

Another pendulum swings to and fro at a regular rate of two times per second. Show that its period is 0.5 s.

### physics

Eight charges (50μC each) are arranged on the corners of a cube side length 1 cm. What is the magnitude of the force on each charge in Newtons?

### PHYSICS(HELP)

Eight charges (50μC each) are arranged on the corners of a cube side length 1 cm. What is the magnitude of the force on each charge in Newtons?

### Physics

If a current is flowing with a value of 5.9 A, how much electron charge passes any single point in 25 seconds? A) 1.9 x 1020 e

### Physics

An object is dropped from a platform100 ft high. Ignoring wind resistance, how long will it take to reach the ground?

### Physics

How much momentum does a .01 kg ping pong ball have if it is traveling at 25 miles/hour? (1.609km=1 mile)

### Physics

How much momentum does a .01 kg ping pong ball have if it is traveling at 25 miles/hour? (1.609km=1 mile)

### physics

Calculate the pressure exerted on the floor by the heel if it has an area of 1.45 cm2 and the woman's mass is 58.0 kg. Express the force in N/m2 and lb/in

### physics

the work function of zinc is 3.6ev what is maximum enegy photoelectron by ultraviolet wave of light 3000angstrome

### Physics

we have to transpose the following equation to find p, but I don't quite understand how to come up with the correct answer: x^2/p^2 + y^2/q^2 = 1 Appreciate help, thanks

### physics

A.Use newtons first law to explain why whiplash occurs? B.why are cars fitted with head rests?

### algebra based physics

Two protons in a nucleus are separated by 8.0×10−15m . What's the potential energy of the pair?

### Physics

A 2473 kg elephant is walking at 3 m/s on a flat surface. How much kinetic energy does he have? Answer in Joules or J