# Physics!

73,661 results, page 100

### Physics

Why they need to use gravitational constant in the formula? What would be the problem if the formula is like F=m1*m2/d2 ?

### Physics

If an electron has a total energy of 5.6 MeV, how would I find the kinetic energy and momentum??

### Physics

A photon has a frequency of 7.3 × 10–17 Hz. Planck’s constant is 6.63 × 10–34 J•s. The energy of the photon, to the nearest tenths place, is × 10–50 J.

### physics

A body is moving with velocity of 10_1.If the motion is uniform; what will be its velocity after 10 second

### physics

A car is travelling along the road at 8m/s.IT accelerates at 1m/s for a distance of 18m.how fast is it then travelling?

### Physics

The string is 0.95 m long with tension 8.00 N. The total mass of the string is 12.34 g. Find the period of the oscillation.

### physics

A man of weigt 600N runs up the stairs of heigt 4m in 3seconds. what is exerted by the man?

### Physics

A truck accelerates from rest at a constant rate of 2 m/s2. How far does the truck travel in the first 3.00 s? A. 36.0 m B. 27.00 m C. 9.0 m D. 18.0 m F. 54.0 m

### Physics

At what displacement the instantaneous velocity become equal to half of its maximum velocity? Plz help me

### physics c

Suppose q1 = +2.90 µC is no longer at y = 0.300 m, but is now at y = 0.244 m. The charge q2 = +2.90 µC is at x = 0 and y = 0.500 m, and the point 3 is at x = y = 0.500 m.

### physics

find the energy of an x-ray photon which can impact a maximum energy of 50 kev to an electron

### Physics

A force of 35.0N is exerted onto a 12.0kg block and the block moves 42.0m. How much work is done?

### physics

a stonne dropped from a cliff, takes 3.0secs to reach the sea. how high is the cliff?

### physics

calculate the escape velocity of a satellite from the earth's gravitational field,if the radius of the earth is 6.4×10^6m

### physics

a ball is vertically upward with a velocity of 35m/s. how long will the ball reaches the ground?

### Physics

A car travel from a to b at 60km and return to a at 90km. What is the average velocity and average speed ?

### Physics

The speed limit on a nearby road is 25 mph what is the speed and meters per second

### Physics

During the first 50 s a truck traveled at constant speed of 25 m/s. Find the distance that it traveled.

### mathematical physics

Obtain the derivative and the unit tangent vector for a vector function a(t) = t i^+e^t^2 j^+ sin2t k^

### Physics

Depth of water is 1000m.Density of water is 1000kg/m3.Calculate atmospheric pressure

### Physics

A 24.5-kg child is 11.6 m from an 85.5-kg adult. Where is the center of mass of this system? Take the origin at the position of the child.

### Physics

The mechanical force acting on a unit are of charged conductor is =? a)f=6/2ke0 b)f=6"/2ke0 c)f=6/ke0

### physics

A constant force acts on a 5.0 kg object and reduces its velocity from 7.0 m/s to 3.0 m/s in a time of 3.0 s. Find the force.

### Physics

Ade throws a ball up to a height of 10m and catches it back. What is the Displacement of the ball

### Physics

Ade throws a ball up to a height of 10m and catches it back. What is the Displacement of the ball

### Physics

A machine has an IMA of 6.0 and an AMA of 5.0. What is the work input needed by the machine to raise a 40 kg load by 3.0 m?

### physics

A body is thrown at an angle 30 to the horizontal with the velocity of 30m/s.After 1 second,its velocity will be

### Physics

A boy pushes a box of mass 20kg with a for every of 50N.What is the acceleration of the box

### Physics

Two vectors A and B have magnitude A=3 and B=3,their vector product is A×B=2i-5k what is the angle between vector A and B?

### Physics

Can you find a vector quantity that has a magnitude of zero but components that are different from zero? Explain.

### physics

If a 5kg object experiences a 10 N force for a duration of 0.10 second then what is the momentum change of the object.

### physics

a point charge placed at the origin. Calculate eletric field at a point 2.0m from the Z axis.

### physics

A solid ball with a volume of 0.1 m3 is made of a material with a density of 2800 kg/m3. What is the mass of the ball? -----kg

### Physics

What role does the mass of the projectile play in changing the horizontal and vertical motions of the projectile? Why? Thank you!

### physics

An electron is located at the origin. A proton is located at (2, 0). Find the electric field direction at (1, 1).

### physics

It takes 5 seconds for a stone to fall to the bottom of a mine shaft. How deep is the shaft?

### physics

An object of mass 5 kg weighs 30 N on planet Z. The acceleration due to gravity on planet z is? a) 30 m/s^2 b) 10 m/s^2 c) 6 m/s^2 d) 0.17 m/s^2 e) 150 N

### physics

A 1.26×103 kg car accelerates uniformly from rest to 14.8 m/s in 2.79 s. What is the work done on the car in this time interval?

### physics

the speed of sound in air at 0°C is 330m/s. at what temperature will the velocity of sound become 366m/s ?

### physics

The initial velocity of a projectile is 12i+13j in m\s. What is the displacement of a projectile at 0.25 seconds later?

### physics

A simple pendulum has a length of 1.25m.calculate its period and what is the percentage increase of the period?

### Physics

A ball is thrown vertically upward with a speed of 31.1m/s. What is the ball's velocity after 2.70s?

### Physics

determine the magnitude and direction of the net force acting on q0 where q0=1uC ,q1=-1uC,q2=2uC and q3=-4

### Physics

for an egg drop project, does putting straws at the bottom of an egg protect it from crashing?

### physics

The energy source used to produce most of the electrical energy in the United States

### PHYSICS

A gun fires a shell at an angle of elevation of 30* with a velocity of 2000ms-1.(A)what is the range of the shell.

### Physics

State the similarities between Coloumb's law And Newton's Law Of Universal Gravitation.

### physics

A 10-kg mass is moving at a speed of 4.0 m/s. How much work is required to stop the mass? A. 20 J B. 40 J C. 60 J D. 80 J E. 100 J

### Physics

An object weighing 1N in air .it got 0.8N weight when it is emerssed in water what is it's loss of weight?

### physics

A string is vibrated with a wave that has a wavelength of 6 meters. How long is 1 loop of the standing wave?

### physics

a force of 0.8N stretches an elastic spring by 2cm. find the force constant. f e = k=? f=ke 0.8=0.02 * k k=0.8/0.02 k=40N/m

### PHYSICS

10N force applied at an angle of 30 degrees with the horizontal, find its horizontal component

### Physics

What is the weight of an object that has a base which is 3 square cm and which exerts a pressure of 21 kg per square meter?

### physics

calculate the ratio of momentum when 1.velocity of the object is doubled 2.mass of the object is halved?

### physics

if the displacement of a particle varies with time as root of x=t+7 what is the relation between the velocity and time

### Physics

A train is travelling at 15m/s. It accelerates at 3m/s² for 20 seconds. How far does the train travel in this time?

### physics

A force of 0.8N stretches an elastic materials by2cm. Find the elastic constant of the material.

### Physics

What does it mean by this, "However, no object is truly stationary, so all motion is relative motion."

### physics

A helicopter flies 65km [N32°E] then 42km[E 21°] determine the total displacement of the helicopter.

### Physics

List and briefly explain as many physical principles as possible that help explain El Nino and its formation.

### physics

how can we hear our own voice even after closing our ears

### physics

Each side of a metal cube is measured to be 2.0 cm ±0.20 cm. What is the absolute uncertainty in the calculated volume of the cube?

### physics.. important stuff !

i still do not understand?? can someone please help me out??? (a) why is the centripetal force neede to keep a body moving in a circular path? (b) In what direction does a centripetal force accelerate the body on whic it acts?? (c) Upon what threee factors does the centripetal...

### Physics

A circuit contains sic 60-W lamps with a resistance of 240-ohm each and a 10.0-ohm heater connected in parallel. The voltage across the circuit is 120 V. Find the current in the circuit for the following situations:::: a. four lamps are turned on b. all of the lamps are turned...

### Physics

consider a cart being pulled up an inclined plane by a student during a Physics lab. The applied force on the cart is 18 N is directed parallel to the incline to cause the cart to be displaced parallel to the incline for a given displacement of 0.7 m. The initial energy plus ...

### Physics

consider a cart being pulled up an inclined plane by a student during a Physics lab. The applied force on the cart is 18 N is directed parallel to the incline to cause the cart to be displaced parallel to the incline for a given displacement of 0.7 m. The initial energy plus ...

### physics

Im having severe trouble understanding the concept of Dimensions. And with 300 other students in my physics class the Professor doens't have alot of time for individual students.... The volume of a liquid flowing per second is called the volume flow rate Q and has the ...

### bobpursley

ok im doing my physics homework and we have to submit the answers online. i keep getting these questions wrong and i only have one more try can someone please tell me how to work it? a 2.5 kg otter starts from rest at the top of a muddy incline 94.6 cm long and slides down to ...

### Physics help

Are you sure that's how you do #4 because they have 2 different directions. I need physics help. I don't understand how to do these questions. Can someone show me what I should use? and explain. I'll do calculations by myself. A stationary curling stone is struck in a glancing...

### Physics

Hi! I need some help with some physics questions. 1. When two point charges are moved farther apart, what is true about their resulting electric and gravitational forces? a. both forces stay the same b. gravitational force stays the same but electric force increases c. ...

### Help with physics!

Hi! I need some help with some physics questions. 1. When two point charges are moved farther apart, what is true about their resulting electric and gravitational forces? a. both forces stay the same b. gravitational force stays the same but electric force increases c. ...

### physics(airplane)

Hi, Does anybody know any websites or ideas of how to make an airplane without any paper (cardboard is allowed). Please help.

### Physics

How do you find maxium height when a ball is hit from a height of 0.08m and has a intial velocity of +7.5 m/s straight up?

### Physics

Rearrange the following kinematics equation for the variable iondicated: a)d=v1t+1/2at^2 i)v1 ii)a b)d=v2t-1/2at^2 i)v2 ii)a

### Physics

A 74 kg skier is pulled 50 meters up a 30 degree incline. How much work is required to pull the skier up?

### Physics

If the distance between two objects is tripled, by what factor will the gravitational force between them change?

### physics

9. what is the relationship between the force and distance in an inverse square law? does force= the two charges?

### physics word problem

why are lightweight tires preferred over lightweight frams in bicycle racing?

### physics

how would a graph of absolute temperature (y-axis) and the product and volume look like (x-axis)?

### physics

a force accelerates a car of mass 1240 kg at 2 km/hr. what is the force? i need help how do you get the acceleration? i know f=ma but what's the a? or is this the wrong equation?

### Physics

How many degrees are between the melting point of ice and the boiling point of water on the Kelvin scale?

### PHYSICS!!

Comet Halley returns every 74 years. Find the average distance of the comet from the sun. How do i do this??

### physics

find the magnitude of the linear momentum of (a)7.1-kg bowling ball traveling at 12 m/s and(b)a 1200-kg automobile traveling 90-km/h

### PHYSICS

a MAGNET CAN EXERT A FORCE ON A MOVING CHARGED PARTICLE, BUT IT CAN NOT CHANGE THE PARTICLE'S KINETIC ENERGY. WHY?

### physics

A lawn tractor tire turns at 65rpm and has a radius of 13cm. What is the linear speed of the tractor in m/s?

### Physics

What is the diameter of a 1.00 meter length of tungsten wire whose resistance is 0.32 ohm (electrical resistance)?

### Physics

A magnet can exert a force on a moving charged particle, but it cannot change the particle's kinetic energy. Why not?

### Physics

Your friend says that any radio wave travels faster than any sound wave. Do you agree or disagree, and why?

### Physics

Ultraviolet light causes sunburns, whereas visible light, even of greater intensity, does not. Why?

### Physics

How do the avalanches of photons in a laser beam differ from the hordes of photons emitted by an incandescent lamp?

### physics

A convex spherical mirror of focal length 15.0 cm is to form an image 9.00 cm from the mirror. Where will the object be placed?

### physics

A force of 200 N acts on a 7.20-kg bowling ball for 0.350 s. Calculate its change in velocity. 7.20/0.350 = 20.57 m/s

### Physics

Two protons in an atomic nucleus repel each other, but they are also attracted to each other. Explain.

### Physics

Why will the escape of neutrons be proportionally less in a large piece of fissionable material than in a smaller piece?

### Physics check

Today's nuclear power plants use nuclear..... to generate electricity. fission?

### Physics check

In a nuclear reaction where energy is released, which has more mass, the products or the reactants? The reactants?

### physics

The 17.9 cm diameter disk rotates on an axle through its center. F1=22.1 N, F2=32.4 N, F3=32.4 N, F4=22.1 N, and d=4.74 cm. What is the net torque about the axle?

### Physics

A 100-n boulder is sitting on a shelf 0.5 meters above the floor. What is the potential energy of the boulder?