# Math/Physics

206,302 results, page 79

### physics

A ball initially at rest rolls down a hill with an acceleration of 4.5 m/s2. If it accelerates for 7.9 s, how far will it move? Answer in units of m

### physics

A kettle brings water to boil by using 233 C of charge over the course of 1.25 minutes. The amount of current that was used is _.__ A?

### physics

Please Help!! How much power is developed by a jumbo jet that cruises at 250 m/s. When the trust of its engine is 100,000 N? Thanks!!!

### Physics

You throw a ball towards a wall at 15ms-1, and it bounces back at 10ms-1. What is the total change in velocity? (the answer is not 5m/s)

### physics

A 600 kg car is moving on a level road at 30 m/s. How large of a braking force is needed to stop it in a distance of 75m?

### physics

If you use a horizontal force of 30.0 N to slide a 12.0 kg wooden crate across a floor at a constant velocity, calculate the acceleration.

### physics

The movement of an object or a point mass at a constant speed around a circle that has a fixed radius is called uniform

### Physics

1. What is happening to that air between the instruments and your ears? 2. How can you produce the change in the frequency? 3. Describe how the notes are produced in a violin?

### physics

a toroid has 3000 turns. the inner and outer diameter are 22 cm and 26 cm. what is the flux density inside the core when there is a current of 5 amperes?

### physics

A racing car has a mass of 1970 kg. The acceleration of gravity is 9.8 m/s^2. What is its kinetic energy if it has a speed of 102 km/h? Answer in units of J.

### Physics

An outfielder throws a baseball to home plate with a velocity of +15 m/s and an angle of 30°. When will the ball reach its highest altitude? (Points : 3) 1.2 s 1.5 s 0.77 s 0.50 s

### physics

A 30.0 kg block falls from a height of 30,4 m. assuming a closed system its speed just before hitting the ground is about?

### Physics

At highway speeds, a particular automobile is capable of an acceleration of about 1.52 m/s2. At this rate, how long does it take to accelerate from 74.0 km/h to 104.0 km/h? (in s)

### physics

a stone propelled from a catapult with a speed of 50mls,attains a height of 100m. Calculate the angle of projection and range.

### Physics

What is the gravitational force between two 10 kg iron balls separated by a distance of 0.1 m? How does this compare with the weight of one ball?

### physics

A 4.3kg object moves across a floor with a velocity of + 8.2 m/s and slides to rest in 5.8 s. The net force producing this acceleration is:

### physics

What potential difference is needed to stop an electron having an initial speed of 3.70x 105 m/s? Answer in volts

### Physics

A 6.5-kg bowling ball thrown with a speed of 5.4 m/s hits a stationary 1.75-kg pin. What is the velocity of each object? Assume that the coefficient of restitution is 0.75.

### Integrated Physics and Chemistry

What are a few of the positive things the Equal Rights Amendment would have done for women in America?

### Physics

A racing car has a mass of 1770 kg. The acceleration of gravity is 9.8 m/s2 . What is its kinetic energy if it has a speed of 133 km/h? Answer in units

### physics

A force of 34.5 meganewtons of thrust launches a Saturn 5 rocket 393 km off the ground. How much work was done (in joules)?

### physics

a uniform plank of lenght 5m and a mass1kg support two masses of 500g and 300g . determine the centre of gravity

### physics

if a 400g ball moving 1.2 m/s [north], receives an impulse that changes its direction and speed to 2.8 m/s [east], what is the change of momentum?

### Physics

A light-rail commuter train blows its 200 Hz horn as it approaches a crossing. The speed of sound is 332 m/s.

### Physics

How much work does spike do when he pulls a 50 kg sled with a force of 200 N with a rope at an angle of 30 degrees above the horizontal, 20 m?

### physics

A light-rail commuter train blows its 200 Hz horn as it approaches a crossing. The speed of sound is 330 m/s.

### Physics

A 4.12 kg mass undergoes an acceleration along both the x and y directions. Ax = -2.60 m/s2 and Ay = 3.50 m/s2. Find the magnitude of the resultant force. Answer in units of N.

### Physics

A strong lightning bolt transfers about 21.45 C to Earth. How many electrons are transferred? The elemental charge is 1.602 × 10^−19 C.

### physics

a 20newton object Is pulled along a horizontal surface at a constant velocity by a 30N force. What is the coefficient of friction

### physics

A 912 kg drag race car accelerates from rest to 108 km/h in 0.795 s. What change in momentum does the force produce?

### PHYSICS

Calculate the maximum height the tank shell reaches using the initial speed (18 m/s), half-time(1.8), and angle(75).

### Physics

An olympic hurdler is in a race. He is running at 10 m/s and jumps over a hurdle. How high did he jump if he was moving at 1m/s as he crossed the fence?

### 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

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