# Math/Physics

208,897 results, page 48

### Physics

What experiment can be used to prove that the value of gravity near the earths surface is constant ie. 9,8m.s

### physics

A crane lifts 1 tonne of concrete through a height of 25 m. How much work does it do? (1 kg has a weight of 9.81 N.)

### Physics

Describe the acceleration time graph of a car traveling forward and applying its brakes.

### Physics

How does the conservation of mechanical energy explain why a planet in an elliptical orbit changes speed?

### physics

A 1300 kg sports car accelerates from rest to 90 km/h in 7.0 s. What is the average power delivered by the engine?

### PHYSICS

A race car's velocity increases from 3.6 m/s to 32.4 m/s over a 5-s time interval. What is its average acceleration?

### Physics

At a spot in the ocean, the surface irradiance is 7.8*10^16 photons and k=.14 m^-1. At what depth does the euphotic zone end?

### Physics

What's the tangential acceleration of a freely swinging pendulum when it makes an angle θ with the vertical?

### physics

How much energy is produced when the sun converts one kg of hydrogen into helium?

### SCIENCE

Didn't mean to ask but i was really curious and didn't get an answer from researching.Why is physics necessary in becoming a dentist?

### physics

Good job "Drwls", your answer to my bowling ball question worked. Way to go!

### physics

What is the frequency of the microwaves in a microwave oven? The wavelength is 12 cm. I have to give the answer in GHz

### Physics

A positive and a negative charge, each of magnitude 1.0 10-5 C, are separated by a distance of 12 cm. Find the force on each of the particles

### Physics/ optics

An object is located 25cm in front of a +6.00 lens, where is the image? is it real or virtual?

### Physics

In a hydrogen atom, if the radius of the orbit of the electron is doubled, then its energy will ... >> Increase by a factor of 2??

### physics

pls what is the formula for calculating period given gravity, mass and length of the material

### Physics

What is the difference in blood pressure between the head and feet of a person of height 171 cm?

### PHYSICS

If the current in a 100 mH coil changes steadily from 25.0 A to 10.0 A in 375 ms, what is the magnitude of the induced emf?

### PHYSICS

What is the inductance L of a 0.40 m long air-filled coil 3.2 cm in diameter containing 10,000 loops?

### physics

what is the most important element for creating a magnetic field. and why? Moving charges..... right?

### physics

do all electrons ejected from a metal surface have the same kinetic energy?

### physics

How much work must be done to increase the speed of an electron from 0.200c to 0.210c? In (MeV)

### Physics

How many electrons must be removed from an electrically neutral silver dollar to give it a charge of +2.0 ìC?

### physics

if the piston is in thermal equilibrium but the it is pushed inward, can there be a change in temperature(increase) even if Q=o

### Physics

What is the strength of the magnetic field a distance of 1 meter from a wire carrying a current of 1 A? B=MoI ------ 2(pi)r Mo=4(pi)x 10^-7 I=1 A How do I know what r is?

### physics

Hi, How can you charge an electroscope negatively? Is it by using a positively charged rod? Can someone please help me? Thank you :)

### physics

Suppose a rock fell off a cliff. After 5 seconds, its speed well be 100 m/s

### Physics

What is the centripetal acceleration of a skater moving with a tangential speed of 2.0 m/s in a circular path with radius 2.0 m?

### physics

A constant net force of 1500 N gives a toy rocket an acceleration of 2.5 m/s2. what is the mass in kg?

### Physics

If a tuning fork puts out a tone at 440 Hz, what is its wavelength in air at 25 degrees?

### Physics

If a tuning fork puts out a tone at 440 Hz, what is its wavelength in air at 25 degrees?

### physics

An automobile driver puts on the brakes and decelerates from 30.0 m/s to zero in 15.0 s. What distance does the car travel?

### Physics

a runner moving at a speed of 5.60 m/s rounds a curved track with a 60.0 m radius. what is the runners acceleration?

### physics

A plastic bobber just barely floats in water. If it weighs 2N in the air, what is its volume

### Physics

While riding her bicycle, she goes from a full stop to 9m/s in 3 minutes. How fast is she acclerating?

### physics

please shelp me with this problem what is the stopping potential (V) if the wavelength of the incident light is 400 nm??

### Physics

if you push a wall with a force of 50N, the work you do is...... (a)500J (b)5000J (c)50J (d)zero

### physics

how high must a 2 kg basketball be thrown so that the top of its arc, it has a potential energy of 160J?

### physics

The space shuttle traves in orbit at 210000 km/hr. How far will it travel after 5.0 hrs?

### physics

if you jump upward with a speed of 2mls, how long will it take before you stop rising?

### College Physics

What is the work required to move a proton 1 cm along the 7 volt equipotential line?

### physics

In the ideal case of zero resistance, a ball rolling on a level surface will accelerate

### Physics

Absolute temperature is proportional to the average kinetic energy of the atoms. True or false?

### physics

A car travels in a straight line for 4.5 h at a constant speed of 61 km/h . What is its acceleration? Answer in units of m/s2.

### physics

By how much does the speed of a vehicle moving in a straight line change each second when it is accelerating at 4 m/s2?

### physics

8. Before you drop a ball held at a height of 5m with a weight of 20 N, what is its gravitational potential energy

### physics

Is it possible for a frictional force to increase the mechanical energy of a system? If so, give examples.

### physics

what is the speed of a ball after it has fallen freely from rest through a distance of 12 meters

### physics

a 10-kg bos slides down a frictionless ramp with acceleration 3.6 m/s calculate the weight anlge? f ?

### physics

If a spring has a constant of 20N/m how much potential energy does it store if it is compressed 2m in joules? <3

### physics

What average power is required for a runner with a mass of 80 kg to reach a speed of 8.2 m/s during a time of 1.8 s?

### physics

4. What force is needed to push a 15 N object up a 20° incline at constant speed when the coefficient of friction is 0.30

### physics

4. What force is needed to push a 15 N object up a 20° incline at constant speed when the coefficient of friction is 0.30?

### Physics

Calculate the tangential speed of the earth around the sun (assuming a circular orbit).

### Physics

A 1200 kg sports car accelerates from 0m/s to 27m/s in 10s. What is the average power of the engine?

### Physics

a circuit contains a 9v battery and two 1 ohm bulbs. what is the voltage drop across each.

### physics

What is the quantum particle of the electric field? Answer a. The proton. b. The electron. c. The photon. d. The neutron.

### Physics

A 1300 sports car accelerates from rest to 90 in 6.5 . What is the average power delivered by the engine?

### physics

does each of the two lenses used in a microscope produce a magnification of the object being viewed?

### physics

calculate the impulse necessary to stop a 1500 kg car travelling at 90km/hour

### Life...

Do i need to take precal and physics in highschool to become a nurse, dentist, or doctor?

### physics

why does the filament of a bulb does not melt though it heats more than 3400 degree celcius

### physics

--------------------------------------- A rugby player of mass 82kg is running at 6.0m/s. How much energy will be needed to stop him? ---------------------------------------

### Physics

.17 kg hockey puck initial velocity 21 m/s stops 62m away. what is coefficient of friction?

### physics

A rotating cylinder about 16 long and 6.2 in diameter what angular speed must it rotate?

### physics

A hunk of cast concrete with a weight of 10 N will float if it displaces 10 N of water. True or False

### PHYSICS

Calculate the radial acceleration of an object on the ground at the earth's equator in m/s2, turning with the planet.

### physics

at time t=0 the driver starts to brae determine how long the bus takes to stop

### Physics

Calculate the radial acceleration of an object on the ground at the earth's equator in m/s2, turning with the planet.

### Physics

What is the force necessary to accelerate an object with a mass of 115 kg and and an acceleration of 6 m/s2 (squared) east?

### physics

which object will have higher inertia a rock of 20kg or a hollow ball of 22kg

### physics

A yo-yo of radius 10 cm and mass 1 kg is dropped from rest. What is the instantaneous torque on the yo-yo if I hold the string with my fingers?

### physics

i have two kinetic energies and my homework asks for the ratio, K2/K1 Do i just divide them?

### Physics, PLEASE HELP!!

A long jumper jumps with the initial velocity of 12.0 m/s at an angle of 20 degrees. what is the displacement of x?

### physics

YOU PUSH A REFRIGERATOR WIT HA FORCE OF 50N AND IT MOVES 3 METERS ACROSS THE FLOOR

### physics

A force of 3000 N is applied to a 1500-kg car at rest. (a) what is its acceleration? (b) what will its velocity be 5 s later?

### physics

How would the use of dark matter affect the earth and universe? Explain possiblities

### physics

A ball is thrown vertically upward with a speed of 27.6 m/s. How high does it rise? Answer in units of m.

### Physics

As the temperature of an object becomes higher, what happens to the average wavelength of the radiation it emits?

### Physics

does a baseball thrown at 100 miles per hour have a lot of force?

### physics

find the force of a toy jeep if the mass is 50kg and is traveling at 4 m/s and the radius is 50 centimeter

### physics

what force is acting on a circular platform rotating opposite of a person standing on the edge?

### physics

a ball moves with a constant speed of 4 m/s around a circle of radius 0.25 m. what is the period of the motion?

### physics

A projectile is launched straight upwards at 45 m/s. Three seconds later, its velocity is A. 75 m/s B. 30 m/s C. 15 m/s D. zero

### physics

How high must a 2.0-kg basketball be thrown so that the top of its arc, it has a potential energy of 160 J?

### PHYSICS!!!

By how many decibels does the sound intensity from a point source decrease if you increase the distance to it by a factor 6?

### physics

how much work is being done if a 100 N box is lifted 3 meters off the ground???

### Physics

If a clock says 10:30 am and the second hand rotates 960 degrees what time would it be?

### physics

the period of revolution of a satellite is 90 min. Find the radius of the orbit assuming an acceleration of 9.8 m/s/s.

### physics

Describe how the energy from a rotating flywheel can be transferred to moving parts of a child's toy.

### physics

explain examples of physical laws used during the Apollo 13 mission to get it home

### physics

a mass 3 kg is dropped from a 20m high stand how long does it take to reach the ground?

### physics

a mass 3 kg is dropped from a 20m high stand how long does it take to reach the ground?

### Physics

How much force is needed to make a 1,400 kg car moving at 35 m/s come to a stop in 5.2s?

### Physics

How much force is needed to make a 1,400 kg car moving at 35 m/s come to a stop in 5.2s?

### physics

How can I calculate exactly where a marble will drop if it is rolling of a table with very little friction??

### physics

the frequency of yellow lights is 5.00 x 10^14 Hz. if it travels through space (where v= 3.00 x 10^8m/s) find the wavelength of this light.

### physics

if a man weighing 80 kg falls from 20000 feet , what would be his weght when he hits the ground?

### physics

a 150g-iron ball at 95 Celsius is dropped into a cavity in a block of ice