Math/Physics

206,302 results, page 68

physics

How much centripetal force is needed to keep a 0.20 kg ball on a 1.50 m string moving in a circular path with a speed of 3.0 m/s?

physics

radius of the earth = 6.37 × 10^6 what is the speed of a 90.6 kg person at the equator? I know that F=m(v^2/r) but I don't know the force. Is there another equation that I'm missing or I'm using the wrong one? Thanks

physics

a hlicopter takes off and travles 300 km due north then returns to its landing field. what is its displacment?

physics

How long will it take a 1030 W motor to lift a 330 kg piano to a sixth-story window 13.0 m above?

physics

What is the minimum velocity needed for a roller coaster , traveling on the ground , to make it over a 112 m hill?

honors physics

What is the minimum velocity for a tolerant coaster traveling on the ground to make it over 112 m hill

science physics

i don't get how to solve this please help me Two resistors, 47 Ù and 82 Ù, are connected in series across a 45 V battery. What is the current in the circuit?

Physics

calculate the initial speed of a bicyclist whose final velocity is 20m/s if he accelerates at a rate of 2 m/s2 in 5 seconds?

physics

compute the least acceleration with which a man of mass 75 kg can slide down a rope which can sustain a weight of 580 N

physics

Time() 0 2 4 6 8 10 12 14 16 Velocity() 0 0 2 5 10 15 20 22 22 By measuring the slope of your curve, find the magnitude of the instantaneous acceleration at times = 9s i don't know how to solve it

physics

An airplane reaches a velocity of 71m/s^2 when it takes off. What must its acceleration be if the runway is 1.0km long

physics

Who developed modern periodic table? Descibe particle arrangements & movement for each phase of matter. (Thank you for helping me)

physics

An object is dropped from rest. What is its instantaneous speed when it has been in motion for 8 s? The acceleration of gravity is 9.8 m/s2 . Answer in units of m/s

College Physics

An electron and a proton are a distance r = 8.5 × 10-9 m apart. How much energy is required to increase their separation by a factor of 6?

physics

A 60kg boy is riding his bike to school. His acceleration is 15 m/sec^2. Determine the magnitude of the force he is exerting.

Physics- moles and gas laws

What is the volume occupied by 8.0 g of hydrogen under a pressure of 2.8 atm and a temperature of 300 K?

physics

When boiling water begins to turn to steam, which of the following remains the same in both the liquid and the vapor?

physics

When boiling water begins to turn to steam, which of the following remains the same in both the liquid and the vapor?

physics

An object is to be thrown through a window 3.5 m high a distance 7.5 m away. It is launched at an angle 70 degreesabove the horizontal.

physics

Why is there always a difference between the experimentally calcuated error for resistance, and the actual components tolerance value?

Physics

How much work is done by a girl weighing 450N while carrying a 2kg package up a 2m flight of stairs?

physics

5. An object that has kinetic energy must have A) momentum. B) acceleration. C) a force applied to it. D) All of these. E) None of these.

physics

5. An object that has kinetic energy must have A) momentum. B) acceleration. C) a force applied to it. D) All of these. E) None of these.

Physics

1. Explain how the ff. works: a. ultrasound imaging device b. photocopying machine c. microwave oven Thank you so much in advance! :)

principles of physics

Calculate the change in potential energy of 7.8 million kg of water dropping 50 m over Niagara Falls.

physics

jeritex mass is 60kg. if he climbs up the flight of stairs 13 meters high in 20 seconds, what is his power output?

physics

a race car's velocity increases from 4 m/s time interval, its average acceleration would be 10 m/s2 ? true or false ?

physics

if a race car's velocity increases from 4 m/s to 36 m/s over a 4 s time interval, its average acceleration would be 10 m/s 2 ? IS THIS TRUE ?

physics

If you pull one end of the rope 1.0 m downward with a 50 N force, find the height you can lift a 150 N load.

Physics

What is the magnitude of buoyant force acting on a 720 cm^3 toy submarine floating in fresh water? (D_water =1 g/cm^3)

Physics

Sunlight strikes a fused quartz surface. At what angle of incidence is the reflected light completely polarized?

Physics

What minimum speed does a 100 g puck need to make it to the top of a 5.9 m-long, 29 degree frictionless ramp?

physics

What is the power delivered by a motor lifting an elevator weighing 1250kg up 89 floors at 16.8 meters per second

Find the power input of a force F=(7 N)ˆý + (3 N) ˆk acting on a particle that moves with a velocity v = (6 m/s)ˆý. Answer in units of W

Physics

Our eyes are sensitive to electromagnetic radiation with wavelengths from 400nm to 700nm. What is associated range of frequencies?

physics

A motorcyclist increases her speed along a straight road from 0 to 120 km/hr in 5 seconds. How much acceleration does she experience

physics

The grid in a high-vacuume triode is usually kept negatively charged with respect to the cathode so that the electrons may be

physics

Which of these two bodies gets its internal heat from nuclear processes? A) Both.B) Sun.C) Neither.D) Earth.

applied physics

Calculate the magnitude of the torque produced by two 25N forces that are 3m apart and in opposite directions

Physics

A 0.5kg puck traveling in a horizontal circle of radius 3.2m has a frequency of 0.5Hz. what is the centripetal force on the cord?

Physics

What is the upper tripper point (UTP) of a comparator with hysteresis if R1 = 47 kÙ, R2 = 68 kÙ and the maximum positive output voltage is 10V?

physics

Determine the magnitude of the force of gravity acting on a 340 kg satellite, 850 km above Earth's surface

physics

Determine the magnitude of the force of gravity acting on a 340 kg satellite , 850 km above Earth's surface.

When a 0.35 kg baseball is hit, its velocitychanges from 21 m/s to -29.5 m/s. What is the magnitude of the impulse de-livered by the bat to the ball? Answer in units of N · s

physics

How long will it take a 1630 W motor to lift a 285 kg piano to a sixth-story window 16.0 m above?

physics

Devise a method for measuring the coefficient of friction between two surfaces using an inclined plane

Physics

Some hydrogen occupies 120 ft at 60.0°F. Find the temperature when its volume is 132ft^3 if the pressure remains constant.

Physics

Some propane occupies 150 cm^3 at 12.4°C. Find the temperature when its volume is 132ft^3 if the pressure remains constant.

physics

Some hydrogen occupies 120 ft at 60.0°F. Find the temperature when its volume is 132ft^3 if the pressure remains constant.

physics

Given that the power consumed by a device is 1000 W operating on a 70-V line, calculate the amount of current it draws.

physics

Given that the power consumed by a device is 1000 W operating on a 70-V line, calculate the amount of current it draws.

physics

How much work does a refrigerator with a COP of 3.8 require to freeze 660 g of water already at its freezing point?

physics help!

Using the Bohr model, estimate the wavelength ë of the Ká characteristic X-ray for a metal an atom of which contains Z = 50 protons.

physics

Using the Bohr model, estimate the wavelength ë of the Ká characteristic X-ray for a metal an atom of which contains Z = 50 protons.

physics

What frequency would you need to produce a sound wave in room-temperature air with a wavelength of 9 m? the answer in Hz

physics

Beats in sound are the result of which of the follwing wave? A) resonance.B) refraction.C) reflections.D) amplitude changes.E) interference

physics

The quality of a musical tone has to do with a variety of which of the following? A) amplitudes.B) sound speeds.C) intensities.D) decibels.E) harmonics.

physics

Sound waves have which of these properties? A) Reflection.B) All of these.C) Refraction.D) Interference.E) Capable of producing beats.

physics

is increasing the current a valid method to increase the induced voltage when a magnet moves into a solenoid?

Physics

An object is executing circular orbits of radius 0.5 m. If it completes an orbit every 3 seconds, what is its tangential speed?

Physics

Two persons A and B are walking with a speed of 4 km/h and 5 km/h respectively in the same direction. Find how far will B be from A after 3 hours ?

physics

How much charge passes through a cross-sectional area of a copper wire in 0.8 s if I = 3.5 A? 1 C -Work equation?

physics

A 2630-kg car drives up a hill 769 meters high in 41.0 seconds. Calculate the power exerted

Physics

Vector A has magnitude 37 units and direction, counterclockwise from east, of 12.9 degrees. What is the value of its x component to 1 decimal place?

physics

Calculate the cost of operating a 65 W light bulb continuously for a 30-day month when electrical energy costs \$0.23/kW·h. \$ 1

physics

what has more inertia?a toy car going 1000 mph or a cruise ship sitting at the dock

Physics

What magnitude of acceleration will result when 60N and 80N forces in opposite direction if applied to a 5kg body?

Physics

A 0.2 kg glass cup at 20 C is filled with 0.4 kg of hot water at 70 C. Neglecting any heat losses to the environment, what is the equilibrium temperature?

Physics

a truck is traveling in a straight line goes 60km in 83minutes. what is its average speed in km per hour?

physics

Wally now lift the box of the floor and put it on a shelf. Does he doing any work? If not why? If so .what energy change is accurring?

PHYSICS

A 60.0 kg rocket accelerates upward from rest reaching a height of 23.4 m in 3.0 seconds. what is the thrust force produced by the engine?

When the object is placed beyond 2f, where should you put your eyes for getting the clear image of it?

physics

m1=4kg and m2=2kg and angle is 42 degrees.if the mass m2 is moving down with 0.5 m/s^2 acceleration, find the coefficient of the friction

physics

What is the moment of inertia of a solid cylinder of radius R=0.9550m,thickness t= 0.015m, and total mass M= 3.565 kg?

physics

a body is thrown vetically up from the ground passes the height 10.2 m twice at an interval of 10s .what was initial velocity?

Physics

A proton moving at 500000m/s enters a series of charged parallel plates. What is the impact speed on the last plate.

physics

How high will a 1.95 rock go from the point of release if thrown straight up by someone who does 66.5 of work on it? Neglect air resistance.

Physics

What is the minimum work in joules needed to push a 1460 kg car 14.0 m up a 12.5 degree incline? (Ignore friction.)

Physics

Calculate the velocity of a satellite moving in a stable circular orbit about the Earth at a height of 2600 km.

physics

Find the distance by which a 43cm diameter, 8.7m tall concrete column is compressed when it supports a 12400kg load

physics

two forces of 10N and 7N respectively are applied simultaneously to an object . The minimum value of their resultant is, in newtons?

physics

A 326 g object is attached to a spring and oscillates with a period of 0.25 s. The total energy in this system is 5.83 J. What is the amplitude of the motion?

PHysics

What is the total energy of a 15-kg mass attached to a spring oscillating horizontally with an amplitude of 20 cm and an angular frequency of 32 rad/s?

physics

What is the magnitude of the average acceleration of a skier who, starting from rest, reaches a speed of 6.8 m/s when going down a slope for 2.5 s?

physics

How far to the nearest meter can a sprinter running at 9 m/s, travel in the time it takes a rock to fall 65 meters?

Physics

Why is parallel circuit brighter compared to series? ( Only one bulb is present in both circuits) Thanks :)

physics

why it is easier to tear a paper off a full roll than a mostly used one? Is it because of Newton's law?

Physics

A boy sledding down a hill accelerates at 1.25 m/s2. If he started from rest, in what distance would he reach a speed of 5.00 m/s?

Physics

A boy sledding down a hill accelerates at 1.25 m/s2. If he started from rest, in what distance would he reach a speed of 5.00 m/s?

physics

A vehicle moves in a straight line with an acceleration of 5 km/h^2.By how much does the speed change each second?Answer in units of km/h

physics

A vector points 34.8 degrees to the Northeast with magnitude 15. What are the north and east components that make up the remainder of the triangle?

Physics

A boy sledding down a hill accelerates at 1.70 m/s2. If he started from rest, in what distance would he reach a speed of 7.40 m/s?

Physics

A boy sledding down a hill accelerates at 1.70 m/s2. If he started from rest, in what distance would he reach a speed of 7.40 m/s?

physics

The minivan your mom lets you drive accelerates from 12 m/s to 24 m/s in 6.5 s. How far does it travel in this time? Assume constant acceleration.

Physics

An object with a mass of 3kg is dropped from 56.3 meters. How far above the ground is it's kinetic energy 1073J?

physics

If a DeLorean rolls gently (vo = 0) off a vertical cliff, how long does it take it to reach a downward velocity of 78 km/h?

PHYSICS

If a DeLorean rolls gently (vo = 0) off a vertical cliff, how long does it take it to reach a downward velocity of 78 km/h?

Physics

How do I find Vector Resolution F = 0.300 g N, theta = 60 degrees. Do I take tan inverse (.3 sin 60/.3 cos 60)?

physics

find the value of 60jule per minute on a system which has 10cm, 100gm and 1minute as fundamental unit

Physics

a bb gun has a muzzle velocity of 325 ft/sec. How long will it take the bb to hit the ground? How far will the bb travel?