# physics please HELP !

74,851 results, page 63-
## Physics

A 5 N force directed to the west acts on an object for 2.0 seconds. What is the change in momentum of the oject? Would it be 5 X 2? -
## Physics

What net external force is required to give a 30 kg suitcase an acceleration of 2.5 m/s2 to the right? Answer in units of N -
## physics

Rubidium forms the postive Rb+ Is this ion larger or smaller then the neutral atom? Explain PLEASE -
## physics

An elevator weighing 2400 N ascends at a constant speed of 5.0 m/s. How much power must the motor supply to do this? -
## physics

A 1100 kg sports car accelerates from 0m/s to 33m/s in 13s What is the average power of the engine? -
## physics

How long will it take a 1920 W motor to lift a 285 kg piano to a sixth-story window 16.0 m above? -
## Physics

If a bullet was fired straight up at a speed of 30 m/s what would be the total time for it to return to its starting point? -
## Physics

If a bullet was fired straight up at a speed of 30 m/s, what would be the total time for it to return to its starting point? -
## physics

How do the acceleration vectors differ on opposite sides of the path for un iform circular motion? How are they the same? -
## Physics

If a bullet was fired straight up at a speed of 30 m/s, what would be the total time for it to return to its starting point? -
## physics

A force of 10N is used to lift 600-kg ball from the ground to the a height of 1.8m when it is let go. What is the speed of the bal when it is let go? -
## physics

A 4430-kg helicopter accelerates upward at 2.2 m/s2. What lift force is exerted by the air on the propellers? -
## Physics

If a car is going .197 meters per second, how long will it take to go 5 kilometers (assuming the ground is perfectly flat). -
## physics

A 1.00 x 10^3 kg sports car accelerates from rest to 25.0 m/s in 7.50 s. What is the average power output of the automobile engine? -
## PHYSICS

A girl rows 10 km downstream in 2 h. Her return trip takes 4 h. How fast can she row in still water. in km/h? -
## physics

A rock is dropped from a height of 130.0 meters. With what velocity does it land? How long does it take to fall? -
## Physics

Two identical gliders slide toward each other on an air track. One moves at 2 m/s and the other at 1 m/s. If they stick together, the combination slides at? Why? -
## Physics

What potential energy does a 60.0-kg gymnast acquire in climbing 5.00 m up a vertical pole? GIVEN: mg = 60 h/d = 5.00 m PE = mgh PE = (60)(5.00) PE = 300 J -
## Physics

A 2.0-kg rock falls from a height of 25 m to a point 20 m above the ground. How much potential energy does it lose? GIVEN: mg = 2.0 kg h/d = 5 m PE = mgh PE = (2)(5) PE = 10 J -
## Physics

In an AC circuit with a frequency 25 Hz producing an rms voltage of 30 V and a 20 farad capacitor, what is the end current? -
## Physics

A 155 N force is applied to the end of a 40 cm wrench at a angle of 45 degrees to the handle. What is the torque? -
## 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

How tall would a water-filled manometer have to be in order to measure blood pressures up to 300mm Hg? -
## PHYSICS HELP

what is the minimum amount of energy required to accelerate horizontally a 3.0g bullet from rest to a speed of 40.0 m/s? -
## physics

A 5.0 m diameter merry-go-round is initially turning with a 4.6 s period. What is the speed of a child on the rim? -
## Physics

A 1250 kg car travelling at 60.0 km/h comes to a sudden stop in 35 m. What is the coefficient of friction acting on the brakes? -
## PHYSICS HELP

1 1200kg car is accelerating at 1.6m/s/s. If the coefficient of friction is .15, what is the force supplied by the engine? please help! urgent! -
## Physics

A skydiver has a terminal velocity of 9.0 m/s. If they have a mass of 98, what is their k value for their air resistance? Use g = 10 m/s/s and do not report units on your answer, they should be N s/m. -
## AP Physics B

What is the force of Friction as a 12 kg object slides down for 30 meters down a 30 degrees incline at a constant velocity? -
## Physics

A person is travelling 6 km (E) then 4 km (N) and finally 2 km (W). Calculate the average speed And velocity. Show your work -
## Physics

Two protons, an infinite distance apart are brought together to a separation of 1 nm. What is the initial potential energy of the system? -
## physics question

find the force exerted by proton and the electron in a hydrogen atom they are 5.0 X 10^-19 coulomb -
## physics

a block of wood of 200g is thrown vetically with a veloncity of 20mls what is the pontential energy? -
## physics

A driver drives 2.5 hours at an average speed of 48MPH. What distance does she travel in this time? -
## physics

A driver drives 2.5 hours at an average speed of 48MPH. What distance does she travel in this time? -
## physics

14,0 of KOH is neutralised in 1dm^3 of water by sulphuric acid with a concentration at 0,1 mol dm^-3 how do i calculate it -
## Physics

a child twirls a yo-yo about in a horizontal circle. The yo-yo has a mass of 0.20 kg and is attached to a string 0.8 m long. what is the velocity of the yo-yo? thanks! -
## physics

A 1.56kg seagull dives through the air and gains 4495 of energy.What is the birds speed? -
## physics

a ball of mass m is thrown vertically upwards with Vo= 10j m/s. Study nature of motion -
## Physics

A boy sledding down a hill accelerates at 1.70 m/s2. If he started from rest, in what distance would he reach a speed of 7.40 m/s? -
## Physics

What hanging mass will stretch a 1.9-m-long, 0.54mm - diameter steel wire by 1.2mm ? -
## Physics

A boy sledding down a hill accelerates at 1.70 m/s2. If he started from rest, in what distance would he reach a speed of 7.40 m/s? -
## Physics

A 2473 kg elephant is walking at 3 m/s on a flat surface. How much kinetic energy does he have? Answer in Joules or J -
## Physics

A 2473 kg elephant is walking at 3 m/s on a flat surface. How much kinetic energy does he have? Answer in Joules -
## Physics

A spherical piece of metal has a radius of .250m and a mass of 503 kg. what is its specific gravity? -
## Physics

If the fundamental frequency of an 70 cm long guitar string is 470 Hz, what is the speed of the traveling waves? -
## physics

During a hard sneeze, your eyes might shut for 0.43 s. If you are driving a car at 125 km/h, how far does it move during that time? -
## Physics

Does the composition of an object affect the final temperature of in objects. This is in terms of thermal equilibrium. -
## grade 11 physics

what is the index of refraction of a medium in which the speed of this radiation is 2.54X10^8 m/s? I don't even know where to start... -
## Physics

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

According to Newton's version of Kepler's third law, how would the ratio T^2/r^3 change if the mass of the Sun were doubled? -
## 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

A 16 kg box slides across the floor with an initial velocity of +7.8 m/s. It comes to a stop after sliding +14.6 m. How much friction was present? -
## physics

if the brakes of an automobile are applied from 70km/h to 35km/h, how many meters does the car travel during this deceleration? -
## physics

A stone of mass m kg is held h metres above the floor 50s.The workdone in joules over this period is -
## Health Physics

As one exhales, what change in energy takes place between the diaphragm and the air in the lungs? -
## PHYSICS

The force applied by the e-brake is F(eb) = m*a(eb) = -8.13*1452 = -12,100 N I didn't get the same answer - I got 11,804.76....please check -
## physics

Correct the following statement: The racing car rounds the turn at a constant velocity of 145 km/hr. -
## Physics

1. A cannon ball M = 10.0kg with V = 2.4×102m/s is broken into 2 parts, if m1 = 6.4kg with angle 37° and m2 with 53°, what is the magnitude of v1 and v2? -
## physics

show that the acceleration is 7.5 m/s² for a ball that starts from rest and rolls down a ramp and gains a speed of 30 m/s in 4s -
## Physics

What is the frequency of an EM wave emitted most strongly by a glowing element on a stove with temperature 1500 K? -
## physics

Show that the acceleration is 7.5 m/s2 for a ball that starts from rest and rolls down a ramp and gains a speed of 30 m/s in 4 s -
## College Physics

If the uncertanty in the slope is 1.214×10-14, is the measured value of ε0 within experimental uncertainty of the accepted value? (Yes or No) -
## Physics

An airplane is flying at an altitude of 2,000 m with a speed of 216 m/s. What is the pressure of air outside the plane? -
## Physics

An airplane is flying at an altitude of 2,000 m with a speed of 216 m/s. What is the pressure of air outside the plane? -
## Physics

What equations should I use to calculate the effective value of g, the acceleration of gravity (in meters/second^2), at 5800 km above the earth's surface? -
## Physics

a 475 kg pre-stressed concrete beam is to be raised 10.0 m in 24.0 s. how many kw of power is needed to for the job -
## Physics

How long does it take for the current in an circuit with = 150Ω and = 65mH to reach half its final value? -
## physics

find the bouyant force on a copper obect that displaces 2.8 meters cubed of water -
## physics

What is the number of the highest harmonic that could be heard by a person who is capable of hearing frequencies up to 1.00×104 ? -
## 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

torque to move a block of m=200kg for 10m at an angle of 25 degree with a speed of 20m/s. -
## physics

Rank, from smallest to largest, the pressures in the tank of motionless fluid shown in the figure. -
## physics

If a man weighs 853.0 N on Earth, what would he weigh on Jupiter where the acceleration due to gravity is 25.4 m/s2? -
## physics

a cyclist moves around equilateral triangle6kn/h10km/h,12km/hfind average speed? -
## PHYSICS

Tin melts at 232 under standard atmospheric pressure. Express this temperature in kelvin -
## PHYSICS DUE SOON

A 95.1-g ice cube is initially at 0.0°C. (b) What is the change in entropy of the environment in this process? ___________J/kg -
## physics

If a cart is initially travelling at 3.5 m/s, and has a mass of 200g, what is it's kinetic energy (LEAVE OUT units of J)? -
## physics

If a man weighs 853.0 N on Earth, what would he weigh on Jupiter where the acceleration due to gravity is 25.4 m/s2? -
## physics

Is the mass of an object has an effect velocity with it land on the ground when freely falling from rest? -
## physics

a cyclist travels at a distance of 10.0 km. in 30 min. after w/c he speeds up to 40 km/hr for 6.0 more mins. Find his average speed. -
## Health Physics

As one exhales, what change in energy takes place between the diaphragm and the air in the lungs? -
## physics

a cyclist travels at a distance of 10.0 km. in 30 min. after w/c he speeds up to 40 km/hr for 6.0 more mins. Find his average speed. -
## physics

Earth is approximately a sphere of radius 6.37 × 106 m. What are (a) its circumference, (b) its surface area, and (c) its volume? please help -
## physics

How long does it take a plane, traveling at a speed of 170 m/s, to fly once around a circle whose radius is 2900 m? -
## Physics

What is the frictional force between the tires of a 2000 kg car and an asphalt road if the coefficient of friction is 1.2? -
## physics

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

Determine the net force needed to cause a 1310kg sports car to accelerate from 0 - 28.6m/s[fwd] in 5.6 s -
## physics

What is the magnitude of the average acceleration of a skier who, starting from rest, reaches a speed of 10.5 m/s when going down a slope for 3.18 s? -
## physics

Write the equation for fill factor in terms of V_max, V_oc, J_max, and J_sc. FF = -
## Physics

What is the resonant frequency in an RLC circuit if R=5 , C=6, and L=12 mH, and V-115 V? (a) 593 (b) 41,400 (c) 1560 (d) 1793 -
## physics

light from the sun travels 1.5x10km to reach the earth .how long does it journey take in minutes? -
## 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

A 50kg person standing on both feet cover a surface about 13 cm x 12 cm. How much pressure is on the sole of their shoes? -
## Physics

Is this true or false? All objects moving in a circle are accelerated. I really don't uderstand this question. -
## physics

damon,reiny,steve,ms sue.plz get a solution 2 my question please itz urgent!!! -
## Physics

If a man weighs 900 N on the earth, what would he weigh on jupiter, where acceleration due to gravity is 25.9 m/s^2? -
## science(physics)

a force f= 3i+cj+2k acting on a particle causes displacement , d=-4i+2j+3k. If the work done is 6 joule then the value of c. Plz. Solve -
## physics

In the Melde's string apparatus, why there is no standing wave in the segment between the pulley and mass hanger?