# Physics!

74,730 results, page 48-
## Physics

If a 70g swimmer pushes off a pool wall with a force of250n, what is her acceleration? -
## physics

A drag racer accelerated from 0 to 475km/h in 4.88 s. Assuming a constant acceleration, how far did it travel? -
## physics

two point charge q1=50c , q2=10c are lactated at (-1,1,-3)m, and (3,1,0)m, respectivly. Find the force on q1.? -
## physics

A 32 kg girl runs up a flight of stairs that is 30 m high. How much work does this require? Not sure how to even start -
## physics engg.

A deutron is moving with a speed of 2*10^8m/s. Find the wavelength of the matter wave associated with it? -
## Physics

A fuel has heat of combustion equal to 30 kJ / g. How much energy is released when 5 kilograms are oxidized? -
## PHYSICS

How could you repair an electric fan that is not working properly? Apply scientific method. -
## physics(measurement)

What accurate method can be used to determine the thickness of a coin. Explain pls.. -
## physics

a bullet is fired horizontally with a velocity of 40 m/s from a height if 50m. how far it will fall to the ground -
## physics

A force of 2 kg weight acts on a body of mass 4.9 kg .Find the acceleration produced. -
## physics

A force of 2 kg weight acts on a body of mass 4.9 kg .Find the acceleration produced. -
## Physics

If one used a stiff vertical spring rather than a regular one what would be the results? The gravitational PE and the Elastic PE would decrease. Am i right? -
## Physics

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

What is the rotational speed of the minute hand on a clock? Convert from rad/s to rev/s -
## Physics (HELP)

The index of refraction of diamond is 2.42. What would be the speed of a light wave passing through a this medium? 8.1 x 10 ^-9 m/s 1.2 x 10^8 m/s 7.3 x 10^8 m/s 9 x 10^-9 m/s -
## physics

what force is necessary to stop a 20 g bullet moving at 200 m/s as it penetrates a wood at a distance of 4 m? -
## physics

What airspeed would a plane have to travel to have a groundspeed of 320 km/h [S] if there is a 50.0 km/h wind coming from the northwest? -
## Physics

At what speed must a 950 kg subcompact car be moving to have the same kinetic energy as a 3.2*10^4 kg truck going 20 km/h ? -
## Physics

A dog is running at 3.0 m/s for 3.6 km. How long did it take him to arrive at his destination? (Give answer in seconds) -
## Physics

Air in a balloon does 50 J of work while absorbing 70 J of heat.What is its change in internal energy? -
## Physics

The longest and shortests wavelengths of the Lyman series of singly ionized Helium -
## physics

a small pith ball carries a charge of -1.3 uc. how many excess electrons does this represent? -
## physics (electric charges)

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

A 3200kg helicopter must accelerate up at 1.0m/s^2. What minimum lift do the rotors need to produce? Thanks for answering! -
## Physics

The time at which it took the arrow to reach the bulls eye is .6 seconds and it will land 1.8m under the bullseye -
## physics

What are the factors that affect the quantity of heat needed to raise the temperature of a substance? -
## PHYSICS/MATH

What is your average power if you lift a 33.8 kg box at a constant speed to a height of 3.27 m in 6.10 s? -
## physics

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

Uranium 235 has 92 protons in its atoms. Calculate the number of neutrons in this atom -
## Physics

How would you change the following Galilean transformation equations in the case where a frame was moving both in the x and the y direction? (Use the following as necessary: x, y, z, Vx, Vy, t.) x' = y' = z' = t' = -
## physics

Calculate the coefficient of kinetic friction for tyre rubber on the road surface. -
## Physics

A truck covers 40.0 m in 9.40 s while smoothly slowing down to final speed 2.35 m/s. Find its accelerations -
## Physics

What is the image distance of a 4 cm tall object placed 40 cm from a concave mirror having a focal length of 10 cm? -13.3 cm 13.3 cm -40.0 cm 40.0 cm -
## physics

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

What is the magnification of a 4 cm tall object placed 40 cm from a concave mirror having a focal length of 10 cm? 0.33 -0.33 1.33 -1.33 I'm thinking B. -
## physics

A car has a velocity of 25m and accelerates uniformly to 45m/s in 10seconds.what is the acceleration? -
## Physics

An object is shot upwards, from the ground, with an initial velocity of 120 m/s. How high will it be after 4.0s? -
## physics

A person can jump to a height of 1.5m on surface of earth. Find the velocity with which he jumps. -
## physics

what force is required to make an object of mass 500g accelerate at 4m/s2 (sqaured) ? -
## physics

how long does a car with an acceleration of 2.0 m/s^2 take to go from 10m/s to 30m/s?and show the solution how do you get the answer. -
## physics

Why do car have head rest?your answer should include the word"force"and "velocity" -
## physics

Why do car have head rest?your answer should include the word"force"and "velocity" -
## physics

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

what is the distance that a satellite must be from Earths surface if it's period of rotation is 1 day? I really not sure where to even start.. -
## physics

When you stand 200 meters away from a 30 meter tall tree, what angle should it take up on the horizon? -
## Physics

Calculate the Magnitude of the resultant of a pair of 100-km/h velocity vectors that are at right angles to each other. -
## physics

how much torque do you exert if you push perpendicularly on a door with a force of 30 N at a distance of 0.85 m from its hinges -
## physics

What is the initial angle 0f projection of a projectile for which the range and the maximum height are equal? -
## physics

If a spring is compressed 2.0 cm from its equilibrium position and the ncompressed an addition 4.0 cm, how much more work is done in the second compression than in the first? -
## physics

State how the centripetal force is provided in the case of a satelite orbiting the earth -
## physics

using ideas of torque and center of gravity explain why a ball rolls down a hill -
## Physics

The speed of a train increased from 20 mi/hr to 30 mi/hr in a distance of 500 ft. Calculate the average acceleration in ft/s2 -
## physics

Why does cross sectional area of a liquid stream reduces while falling vertically?? -
## physics

The equation y=5sin(3x-4)where y is in millimeters x is in metres and t is in seconds,represents a wave motion -
## Physics

A 1.25kg book in space has a weight of 8.35N. What is the value of the gravitational field at that location ? -
## Physics

A standing wave has wavenumber 200 rad/m. What is the distance between two adjacent nodes. -
## physics

how much heat is required to change 400g of ice at -20c into steam at 120c -
## physics

Calculate the amount work done on 60 N of force is used to move an object a distance of 4.0 meters -
## physics

A hockey puck has no friction on it. It has a mass of 0.28 kg and experiences a force of 48 newtons. What is its acceleration? -
## physics

distance a cannonball travels when shot horizontally with a velocity of 28.3 at 30 degrees? I'm not sure what formula I need to use. Please help. -
## physics

A stone is thrown up with a velocity of 39.2 at an angle of 30° above the horizontal find at what times, it will be at a height of 14.7 -
## physics

A car on the highway travels at 90 km/hr. Express this speed in m/s. can yall show me how to convert this -
## Physics - please check over

Could I please get some further assistance on a question I posted earlier? I'm not getting the correct answer and I'm not sure what I'm doing wrong. -
## Physics

Name any Margins of error that would happen in the lab "Which path requires the most energy? (gas) -
## Physics

a westward force of 20 N acts on a 2.0 kg object moving eastward at 60 m/s for 2.0 s. What is the resulting velocity? -
## Physics

Calculate the distance (in ) that Larry runs if he maintains an average speed of 8.9 for 1 hour. -
## Physics

A 0.50 kg hammer is taken on a space mission. What is its weight on a planet where the acceleration due to gravity is 3.8 m/s2? 0.50 kg 1.9 kg 0.50 N 1.9 N -
## physics

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

A polar satellite is launched at 850km above earth.Find its orbital speed. -
## Physics

A 2000 kg starts from rest and gains a velocity of 20 m/s in 5 s. What force wad applied on it? -
## Physics

On a dt graph if there is a curve from 1 decreasing to 1.2 in an interval does is the velocity and acceleration + or 9? And is it slowing down or speeding up or neither? -
## physics-

In a string and pulley problem, will friction increase or decrease the tension.can you please explain if you can? -
## Physics

A rubber ball of mass 0.12kg is held at a height of 2.5m above the ground, and then released. -
## PHYSICS

How is the evolution of animal like the long necked giraffe explained by Charles Darwin? -
## physics

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

The magnitude of the magnetic field 8.0 cm from a straight wire carrying a current of 6.0 A is A) 3.0 ƒÎ ~ T. B) 1.5 ~ T. C) 1.5 ~ T. D) 3.0 ~ T. E) 3.0 ~ T. -
## physics

I need to know the resistivity of german silver wire. I've looked at a few Google sources and I've seen several different results. Anyone know which value I should use? -
## Physics 1

(II) How close to the edge of the 20.0-kg table shown in Fig. 9–47 can a 66.0-kg person sit without tipping it over? -
## physics

A 55 kg swimmer crosses a 100 m pool in 12 s. If she moves with a constant velocity, what is her momentum? -
## physics

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

Charges q1 and q2 lie on x axis at points x= -a and x= 5, respectively. (a) how must q1 and q2 be related for the net force on charge +Q at x = a/2 to be zero ? (b) and if +Q is placed at x = 3a/2. -
## physics

Find the final speed of the train assuming no friction. Answer in units of m/s -
## Physics

What is the wavelength of visible light of 6 x 1014 Hz frequency? 500 nm 400 nm 4000 nm 4 nm -
## Physics

Determine the magnitude of current I3. Let the voltage of the bottom battery VB =13.0 volts and r= 1.0 Ω. -
## Physics

Aircraft with acceration of magnitude of 42.5 m/s. If starting from rest how long will it take to travel a 2.6 km runway? -
## physics

Starting from the constant-acceleration kinematic equations, write a formula that gives xf in terms of t, xi, vf, and a. -
## physics PLEASE HELP

how do you rearrange this equation weight=T1sin57+[T1cos57/cos23.5]xsin23.5 when you're trying to isolate T1????? -
## Physics

what is the angular speed, in rad/s, of a point on the surface of Jupiter at latitude 72 degrees N? -
## Physics

A polar satellite is launched at 850km above earth. Find orbital speed. -
## physics

a rock was thrown at the height of 50.0 m above the ground with an initial velocity of 20.0 m/s straight upward. -
## physics

Through the process of doing work, what allows energy to move between the external world and the system? the result of what??? -
## physics

What is the kinetic energy of a car of mass 1900 kg moving at a constant speed of 21 m/s -
## Physics

The sum of 2 vectors is the smallest when the angle between them is : a) 0 b) 45 c) 90 d) 180 d) i believe is the correct answer but i'm not sure exactly. Thanks in advance for your help. -
## physics

a pendulum swing with a speed of 1.5 m/s at its lowedt point. How high will it rise before it stops -
## Physics

If you are 2.0 s from being directly under a window that is 11 m above the sidewalk your standing on, and someone throws a water ballon will you get hit? -
## physics

A ball strikes against the floor and returns with double velocity.In which type of collision is it possible? -
## physics

A stone is dropped from a 100m bridge. How long does it take the rock to reach the ground? -
## physics

Estimate the magnitude of the electric field in a cell membrane with a thickness of 8nm -
## Physics

If train travelling 72kmph is to be brought to rest distance of 200m then its retardation should be -
## physics

if the resultant of 2 equal force inclint to each other at 60° is 8root3N. Find the component forces?