# Math/Physics

211,502 results, page 80

### physics

in einstein's famous equation e=mc^2, describing the relationship between matter and energy, the units for E are m=====>kg, c=====>m/s a) kg m/s b)kg m/s^2 c) m^2/s^2 d)kg m^2/s^2 I think its either B or D but indecisive...

### physics

A baseball is thrown from the roof of a 24.0-m-tall building with an initial velocity of magnitude 10.0 m/s and directed at an angle of 53.1° above the horizontal.

### St. Basil's school. Physics

The time period of two pendulums are 1.44s and 0.36s respectively. Calculate the ratio of their lengths.

### physics help

how much work must be done to raise a 5kg block of steel from the ground to a height of 2m (in Joules) in the absence of friction?

### Physics

Suppose the graph of displacement vs. time produced by the ball's motion is: y = 1.56t^2 + 1.04t + 8.11 What is the magnitude of the acceleration of this object?

### Physics

I've read all my resource materials and looked for outside resources already and i can't find an equation for this. I would appreciate any help

### Life orentation,maths,physics,business,geography

Explain three ways in wich you can help to adress poverty and aids in s.a

### physics

A certain bacterium swims with a constant speed of 4.61 µm/s. How long will it take to swim across a petri dish that has a diameter of 8.69 cm?

### Physics

A body is projected at angle of 30 degree with the horizontal at an initial speed of 200m/s.how far from the point of projection will it strike

### physics

What state of the art computer technology is used to train pilots when wanting to copy the experience of flying an aircraft?

### Physics

If the rate of continental drift were to abruptly slow from 1.0 cm/y to 0.5 cm/y over the time interval of a year, what would be the average acceleration?

### physics

A 1100 kg car accelerates from rest to 27 m/s in 6.0 seconds. Neglecting friction, hat is the average power consumption in horsepower?

### physics

An object is dropped from rest at a height of 112 m. Find the distance it falls during its final second in the air. m

### physics

A ball is thrown straight up and reaches a maximum height of 7.16 m. What was its initial speed? The acceleration of gravity is 9.8 m/s Answer in units of m/s.

### physics

a mass of 15kg was suspended from a ceiling is pulled aside with a horizontal force,F, calculate the value of tension, T. (g=10m/s)

### physics

A boy moves 5km eastward and then change his direction towards westward in 4km.calculate his resultant displacement

### PHYSICS

forces of 3N and 4N and 12N act at a point in mutually perpendicular directions. Tha magnitude of the resultant force in newton is

### Physics

How much work did the movers do to push a 49.0 kg crate 10.3 m across a rough floor at a speed of 2.9 m/s with a horizontal pushing force of 48 N ?

### Physics

Ivan rides his motorcycle 4.5 times around a circular track that has a radius of 100 m a)what is the distance traveled and b)what is the displacement?

### physics

An object is located 27.6 cm to the left of a converging lens whose focal length is 46.5 cm. (a) Determine the image distance and (b) the magnification.

### physics is this correct

What is the radius of a real or imaginary nucleus of 46X100 do I use the formula R = R_o * A^(1/3) and therefore (1.3*10^-15)* 100^(1/3) =6.0340655e-15?

### Physics

A ball is thrown vertically into the air with a velocity of 10ms to the negative 1 power. What will its displacement be after 1.5 seconds?

### physics

Two objects attract each other gravitationally with a force of when they are 0.25 m apart. Their total mass is 4.00 kg. Find their individual masses

### SPR,PHYSICS

A block of wood floats in water with two-Third of its volume submerged its relative density is equal to?

### Physics

How much time does it take for a car to come to rest if it has an initial speed of 22m/s and slows with a deceleration of 6.1 m/s^2 Will my answer be 3.6 m/s^2

### Physics

How much time does it take for a car to come to rest if it has an initial speed of 22m/s and slows with a deceleration of 6.1 m/s^2 Will my answer be 3.6 m/s^2

### Physics

Find the minimum initial speed of a projectile in order for it to reach a height of 2022 km above the surface of the earth.

### physics

"How far would a tennis ball (100g) go if thrown from your catapult at a height of 1m with a force of 50 N and at an angle of 50 degrees from the horizontal?"

### Physics

What is the gravitational force between two identical 4,500 kg asteroids whose centers of mass are separated by 120 m?

### Physics

A train can deccerate at 0.4 m/s. It's traveling at 160km/hr. How far in advance should it apply brakes to come to a full stop.

### physics

what minimum initial velocity must aprojectile have to reach atarget at a distance of 25m away? (g: 10m/s)

### physics

A stretched string of length 168 cm vibrates in its nth mode. The separation distance from node to antinode is 21 cm . What is the value of n?

### Physics

Find the volume occupied by 3.14 moles of an ideal gas at standard conditions of pressure and temperature (P = 1.00 atm, T = 273 K).

### physics

determine the energy stored in a 2m long wire of cross sectional area 0.5mm^2 kf the force of 50N is applied to it.

### chemistry, physics

How would you be able to utilize a calorimeter to determine the specific heat of substance that has a lower density than water?

### physics

find the linear speed of each point 2cm and 15cm from the axis of phonograph record rotating at 33 an 1/3 rev/min

### Physics

Where did the waste energy go to? A ball rolls off the ramp on the edge of a table heading downward and hits the ground.

### physics

In a certain right triangle, the two sides that are perpendicular to each other are 7.00 m and 8.30 m long. What is the tangent of the angle for which 7.00 m is the opposite side?

### physics

C1=3.00uF and Vab = 120V. The charge on capacitor C1 is 150 uC. Calculate the voltage across the other two capacitors.

### PHYSICS

A CAR TRAVELLING AT 30M/S Overcome A FrictionAlly Resistance Of 100N While Moving.What Is The Power Of The Engine(Take 1 Hp=3/4 Kw)

### Physics

A floating ball normally weighs 7 N. The acceleration of gravity is 9.8 m/s^2. What is the size of the buoyant force that acts on it? Answer in units of N.

### physics

A body is executing of amplitude 1m . Its velocity while passing through mean position is 10m/s . Find its frequency

### Physics

Calculate the torque on a coil in a motor of length 0.2m and a width of 0.1m which carries a current of 5A placed in a magnetic field of 0.5T and has 1 turn.

### physics

A ball is thrown directly downward with an initial speed of 8.95 m/s, from a height of 29.0 m. After what time interval does it strike the ground?

### Physics

Calculate the distance travelled by a car with a velocity of 30m/s and it increase its speed to 60 m/s in 2 hours.assume acceleration is constant.

### Physics

A pulley system has a velocity ratio of 4 and an efficiency of 80%.calculate the value of the effort required to raise the load of 480N

### physics

(a) Two point charges totaling 7.50 µC exert a repulsive force of 0.100 N on one another when separated by 0.561 m. What is the charge on each?

### Physics

If the length of pendulum is 0.8+/-0.01m and time peroid is 2.5+/-0.012 sec. Then percentage error in acceleration due to gravity will be

### physics 11th class

Calculate the power of a crane in watts which lifts a man of 100kg to a height of 10m in 20sec

### physics little folks

a mass is attached at the spring perform SHM with frequency of 15 hz find the acceleration when displacement is 1.6cm

### Physics

Six charge equal to Q are placed at the corners of regular hexagon of each side x,what is the electric potential at the intersection of the diagonals?

### Physics

A model rocket was launched Amazon man of its height and horizontal distance from launch pad where they can as shown in the table

### Physics

A ball thrown vertically upward and return in20 seconds.find the velocity and the maximum height with explanation

### physics

Two forces 5N &10N are acting at an angle of 120° between them. Find the resultant force in magnitude and direction.

### physics

A flywheel is rotating at speed of 1200 rpm its angular acclaration is 4 rad/s how many rotation it will be done before coming to rest

### physics

three resistors of 2ohm, 3ohm and 4 ohm are connected in (a) series (b) parallel. find the equivalent resistance in each case

### physics

If a material contains three elements but not joined in a fixed proportion, it is a(an) A. mixture. B. compound. C. atom. D. none of the above D?

### physics

A block of wood is 8.00cm long, 20.0cm high, and 0.10m wide. its mass is 1.00kg. what is its density in g/cm3?

### physics

what change in velocity would be produced on a body of mass 4kg, if a contact force of 16N act on it for 2sec.

### physics

Simpson drives his car with an average velocity of 48.0 km/ to the east. How long will it take him to drive 144 km on a straight highway?

### physics

An object 4cm high is placed 25cm from a covering lens of focal length 15cm the image height is

### Physics

Calculate the skid_to_stop distance of a car traveling on a road at 100 kilometers per hour with a coefficient of friction of 0.68...

### physics

a sportsman develops a maximum speed of 12 m/s when he is swimming in a pool. Calculate the time interval that is required to travel a distance of 25 m.

### Physics

A bean jumps vertically off of a table. It has a speed of 10 m/s when it reaches half of its maximum height. How high does it rise?

### physics

How much heat is needed to raise the temperature of 0.800kg ethyl alcohol from 15celsius to its boiling point at 78.3celsius?

### Physics

A car accelerates from rest at 2.9 m/s^2. How much time does it need to attain a speed of 4 m/s? Answer in units of s. are you supposed to divide 2.9 by 4?

### physics

A car travelled 7km40degree west of north and then 10km east.what is the resultant displacement using scale drawing

### physics

A particle is drop from a vertical height (h) and falls freely for a time(t) with the aid of a sketch explain how (h) varies with (I) t (ii) t square

### physics

what is the minimum effort required to raise a load of 5kg in an ideal pulley system taking gravity to be 10m/s/s

### Physics

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

### Physics

A 83.0-kg person, hanging from a rope, is being pulled away from a burning building by a firefighter, as shown in the figure below.

### physics

A stone is moved round a horizontal circle with a 20 cm long string tied to it. if centrepetal acceleration is 9.8 m/s2, then its angular velocity

### physics

A body moving with a velocity of 3m/s is brought to rest by a constant force after travelling 15m, calculate the retardation.

### Physics

A flywheel with a moment of inertia of 1.00kg m^2 is rotating at 100 rpm. What torque is required to bring it to rest in 10.0 revolutions?

### Physics

Rain drops hitting the side window of a car in motion often leave diagonal streaks if there is no wind. Why?

### Physics

For a certain projectile, the horizontol range is twice in magnitude of the maximum height attained by it. Find its angle of projection.

### physics

Find the gravitational force of attraction between two balls each weighing 10 kg,when placed at a distance of 1 meter apart

### physics

What should be the minimum initial velocity with which a missile has to be launched so that it reaches a target of 1000km away in the same plane

### physics

How much work must an ideal refrigerator perform to make 1 kg of ice at -10C from 1 kg of water at 20C when 20C is also its exhaust temperature?

### physics

A man holds a child on shoulders while watching a football match. How much work has he done if the game last for 2 hours

### Physics

a 4500 kg truck traveling at 17.5 m/s collides with a motionless 1350 kg car. they become locked together. if there is no friction, what is their velocity?

### 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, science

What centripetal force is needed to keep a 10 kg object moving at a constant speed of 10 m/s in a circle having a radius of 11 m?

### physics

if someone throws a .1kg ball at the speed of -25m/s, why is the average net force positive instead of negative?

### physics

How much elastic potential energy is stored if a 5kg object is suspended from a whose spring constant is 100N/m

### Physics

you are skiing down a slope angled at 30 degrees to the horizontal. Your acceleration is 2m/s^2. what is the coefficient of kinetic friction between you and the hill?

### physics

A 60kg boy climbs 70 fligts of stairs each 20cm high in one minute how much powers is developed?

### physics

Determine the ionization energy required to extract the electron totally out of a hydrogen atom, and put it at rest

### Physics

Computer the power output in watt of a machine that lift a 50kg crete through a height of 20cm in 1minute

### 11 grade / physics

a body reaches the max height of 80m when projected at the angle of 30degree find the horizontal component

### Physics

Let F1=10i-15j-20k,F2=6i+8j-12k. Find their dot product and the angle between those two vectors

### physics

the Ferris wheel has a diameter of 150m and takes 30min to make a full circle. Determine the speed of ride in m/s

### physics

determine the center of mass for three particles(1.5, 2.5, 3.5) forming a equilateral triangle one side lenght of 135cm.

### Physics

3 particles of masses m1 = 1.5 kg , m2 = 2.5 kg and m3 = 3.5 kg form an equilateral triangle of edge length l= 135 cm. Determine the center of mass of the system.

### Physics

Find the terminal velocity of a raindrop of diameter 3mm when it fall through atmospheric air (Appointment and is 249.7m/s)

### Physics (Waves)

Determine the angle between a polarizer-analyzer combination that allows 33% of the incident light to pass through.

### physics

200g of steam at 110°C is condensed, and the resulting water is frozen into ice at 0°C. How much heat was removed?

### physics relativity

An observer on Earth sees you travel 1000 m at half the speed of light. What distance do you think that you travelled?

### Physics

Two positive charges of 0.2microC and 0.01 microC are placed 10cm apart. Calculate the work done in reducing their distance to 5 cm