Tuesday
September 27, 2016

Homework Help: Science: Physics

Recent Homework Questions About Physics

physics vectors
In the figure below, a spider is resting after starting to spin its web. The gravitational force on the spider is 0.158 N on the junction of the three strands of silk. The junction is supported by different tension forces in the two strands above it so that the resultant force...
Wednesday, August 24, 2016 by john

PHYSICS
A BALL MOVES ROUND A CIRCLE WITH RADIUS OF 20CM CALCULATE THE DISTANCE
Wednesday, August 24, 2016 by ORJINTA

physics vectors
If vector A = (6.00 i -8.00 j) units, vector B = (-8.00 i + 3.00 j) units, and vector C = (25.0 i + 22.0 j) units, determine a and b such that (a vector A + b vector B + vector C= 0.) a=? b=?
Wednesday, August 24, 2016 by john

Physics
Starting from rest, a 2500 kg helicopter accelerates straight up at a constant 1.7 m/s2. What is the helicopter's height at the moment its blades are providing an upward force of 29 kN? The helicopter can be modeled as a 2.6-m-diameter sphere. How do you start this ...
Wednesday, August 24, 2016 by Brittany

Physics
please help me 1)In the movie The avengers, Captain America sees an alien speeder incoming. The speeder passes directly overhead at 3.65m. If he throws his shield straight up with a speed of 7.40 m/s from a height of 1.55 m above the ground (a) will the shied reach the speeder...
Wednesday, August 24, 2016 by Kevin

physics
A 500 car travelling at 45 km/hr towards west collides w/a 20000 kg truck travelling at 30 km/hr, 30 degrees south of west. if the two vehicle remain tangled together after collision, in what speed and in direction will they move?
Wednesday, August 24, 2016 by Iker

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?
Wednesday, August 24, 2016 by Anonymous

physics
A vertical container with base area measuring 12.3 cm by 13.7 cm is being filled with identical pieces of candy, each with a volume of 50.0 mm^3 and a mass of 0.0200 g. Assume that the volume of the empty spaces between the candies is negligible. If the height of the candies ...
Wednesday, August 24, 2016 by jacob

Physics
When observing a stem of coconut trees during sunshine,how the light cannot pass through the leaves of the coconut tree even though it is thin and it form shadow, whereas the stem allows the light to pass through them but their stem is thick and how possible this could be??
Wednesday, August 24, 2016 by Emitai Maiwelagi

Physics
Totally confused on this question, Please help. 1)In the movie The avengers, Captain America sees an alien speeder incoming. The speeder passes directly overhead at 3.65m. If he throws his shield straight up with a speed of 7.40 m/s from a height of 1.55 m above the ground (a...
Wednesday, August 24, 2016 by Kevin

physics vectors
A snow-covered ski slope makes an angle of θslope = 34.0° with the horizontal. When a ski jumper plummets onto the hill, a parcel of splashed snow is thrown up to a maximum displacement of 1.10 m at θsnow = 24.0° from the vertical in the uphill direction as ...
Tuesday, August 23, 2016 by john

physics vectors
Consider the two vectors A with arrow = 3 i − j and B with arrow = − i − 6 j. Calculate the directions of A with arrow + B with arrow and A with arrow − B with arrow. A with arrow + B with arrow ° (counterclockwise from the +x axis) A with arrow &#...
Tuesday, August 23, 2016 by john

physics
A plane flies from base camp to Lake A, 260 km away in the direction 20.0° north of east. After dropping off supplies it flies to Lake B, which is 150 km at 30.0° west of north from Lake A. Graphically determine the distance and direction from Lake B to the base camp. ...
Tuesday, August 23, 2016 by john

physics
Two trains 200m and 300m are running towards each other at 50km/hr and 40km/hr respectively and the distance between the two trains is 12km. In how many minutes will the two trains cross each other.?
Tuesday, August 23, 2016 by Abul Qasim

Physics
A ball thrown vertically upwards is caught by the thrower 8 seconds afterwards . (take g =10) When the ball is caught by the thrower: what is its displacement from the initial position? b) what is the initial velocity? c) To what height does the ball rise? d) With regard to (c...
Tuesday, August 23, 2016 by Wawen

physics
There are 6 resistor of resistance 1ohm
Tuesday, August 23, 2016 by pratyush

Physics
Find another velocity when horizontal range is equal and one velocity is 500m/s and angle is 30degrees
Tuesday, August 23, 2016 by Brijtosh

physics
the upthrust on a boat is 1000 N what is the weight of the boat
Tuesday, August 23, 2016 by meenakshi

physics
If your weight is 300 N what is the upthrust on you when you are floating in water
Tuesday, August 23, 2016 by meenakshi

physics
if the weight of the stone was 2 N and the upthrust was 1 N what weight would the force meter show?
Tuesday, August 23, 2016 by meenakshi

Urgent help! Physics
A ball is kicked into the air with a speed of 10m per second at angle of 60 degrees to the horizontal (take g=10). a) Calculate the horizontal and vertical speed of the ball b) Calculate the ball's time of flight c) Calculate the distance from the kicked point that the ...
Tuesday, August 23, 2016 by Papsi

physics
A uniform wooden plank 68cm long and weighing 38N rest horizontaly on two knife edges each 10cm from the ends of the plank. (1) What is the greatest land which applied at one end of the plank will not cause it to over turn. (2) what are the reactions of the support cohese a ...
Tuesday, August 23, 2016 by Asare Joseph

physics
A 1-kg mass hangs by a string from a disk with radius 4.6 cm which has a rotational inertia of 5 × 10-5 kg·m2. After it falls a distance of 0.8 meters, how fast is it going to the nearest hundredth of a m/s?
Monday, August 22, 2016 by laaamaama

Physics
wave traveling on a rope is given by y=0.25 sin(0.3 radX-40radt), where y and X is expressed in meter and t is in seconds. Determine a-Amplitude. B-frequency C-Direction of motion. e-Displacement at X=0.6 m and t=2.3 s.
Monday, August 22, 2016 by Shehab

physics
A 126 kg student sits on a chair which is solely supported by a solid 0.4 meter-long steel rod 0.81 cm in diameter. To the nearest micron (millionth of a meter), what is the change in length of the rod produced by the student's weight?
Monday, August 22, 2016 by clache

physics
In the figure below, the bar is 2.4 meters long and has a mass of 145 kg. To the nearest newton what is the tension in the wire?
Monday, August 22, 2016 by clache

physics
should the bulb of thermometer be completely immersed in boiling water to measure its boiling point
Monday, August 22, 2016 by remya

physics
A train starts from rest from a station with acceleration 0.2m/s2 on a straight track and then comes to rest after attaining maximum speed on another station due to retardation 0.4m/s2 .If total time spend is half an hour, then distance between two stations is_ ?
Monday, August 22, 2016 by binalika

physics
Why we feel pain don't having sweater and not feel pain having sweater by beating with a stick ?
Monday, August 22, 2016 by wajdan

physics
how scientists inventions are effecting the environment?
Monday, August 22, 2016 by esha

Physics
A flowerpot falls from a windowsill 25.0 m above the sidewalk. A. How fast is the flowerpot moving when it strikes the ground?? B. How much time does a cat on the sidewalk below have to move out of the way before the flowerpot hits the ground? (Please answer with step by step ...
Sunday, August 21, 2016 by Maggie

Physics
An arrow is shot straight up from the edge of a cliff with an initial velocity of 50 ft/s. Answer the following questions using English units. The acceleration due to gravity has a magnitude of 32.2 ft/s. A. Find the time to reach the highest point. (please use step by step ...
Sunday, August 21, 2016 by Maggie

Physics
A robot probe drops a camera off of the rim of a 239 m high cliff on Mars, where the free-fall acceleration is -3.7 m/s^2. A. Find the time required for the camera to reach the ground. B. Find the velocity with which it hits the ground.( shown work will be appreciated)
Sunday, August 21, 2016 by Maggie

Physics
An arrow is shot straight up from the edge of a cliff with an initial velocity of 50 ft/s. Answer the following questions using English units. The acceleration due to gravity has a magnitude of 32.2 ft/s. A. Find the time to reach the highest point. B. Find the displacement at...
Sunday, August 21, 2016 by Maggie

physics
you walk 95.0 m at a speed of 1.26 m/s and then run 95.0 m at a speed of 3.61 m/s. what is the average velocity?
Sunday, August 21, 2016 by karen

physics .Henry,Damon,Steve,Saed,bobpursley, And This is my question every one
A ball is thrown straight up by a passenger in a train that is moving what a constant velocity. Where would the ball land —back in his hands, in front of him, or behind him? Does your answer change if the train is accelerating in the forward direction? if yes, how?
Sunday, August 21, 2016 by himel

physics .Henry,Damon,Steve,Saed,bobpursley, And This is my question every one
Two cannonballs are shot in sequence from a can-non, into the air, with the same muzzle velocity, at the same launch angle. Based on their trajectory and range, how can you tell which one is made of leand and which one is made of wood. If the same cannonballs where launched in...
Sunday, August 21, 2016 by himel

physics .Henry,Damon,Steve,Saed,bobpursley, And This is my question every one
A rocket-powered hockey puck is moving on a (friction-less) horizontal air-hockey table. The x- and y-components of its velocity as a function of time are presented in the graphs below. Assuming that at t=0 the puck is at (X0,Y0)=(1,2), draw a detailed graph of the trajectory ...
Sunday, August 21, 2016 by himel

physics .Henry,Damon,Steve,Saed,bobpursley, And This is my question every one
Same rental cars have a GPS unit installed, which allows the rental car company to check where you are at all times and thus also know your speed at any time. One of these rental cars is driven by an employee in the company's lot and during the time interval from 0 to 10s...
Sunday, August 21, 2016 by himel

physics
1. If one point charge is located at each corners of a right triangle, where q1=q3= 5.0μC, q2= 2.0 μC, and a= 0.10 m. Find the resultant force felt by the third charge.
Sunday, August 21, 2016 by oishee

Physics
At the beginning of a roller coaster ride the car is staionary at the top of a 30m high hill and then begins to fall. Neglect any resistive forces. Calculate the speed of the car when it reaches the top of the second hill on the roller coaster. The second hill has abheight of 12m
Saturday, August 20, 2016 by Maddi

physics
a boy pulls a 15 kg over level ground by a rope with a force of 50 newtons at 30 degrees above the horizontal, the coefficients of friction between the box and the ground are 0.3 and 0.4, calculate the normal force exerted on the box to the ground, calculate the acceleration ...
Saturday, August 20, 2016 by bryan

physics
a 75kg person is standing on a scale in an elevator, the scale gives a readout in newtons(you have to use a free body diagram)determine the reading on the scale in newtons in each of the following situations, when the elevator is not moving, the elevator is moving upward at 2...
Saturday, August 20, 2016 by bryan

PHYSICS ASAP REPLY
What is the difference between a hydrogen filled balloon and an air filled balloon moving in air? please answer. THe question is from the chapter PRESSURE.
Saturday, August 20, 2016 by A GOODSTUDENT

Physics
A man uses a crowbar 1.5 meters long to lift a rock weighing 600N (Newtons). If the fulcrum is 0.50 Meter fromthe end of the bar touching the rock,how much effort The man should apply?
Saturday, August 20, 2016 by Hasan nagra

PHYSICS pressure
What is the difference between a hydrogen filled balloon and an air filled balloon moving in air?
Saturday, August 20, 2016 by A GOODSTUDENT

PHYSICS topic is pressure
Why does a person feel difficult to breathe when he is in a deep well? Please answer!!!
Saturday, August 20, 2016 by helpneededstudent

Physics
a stone drops from the edge of the roof. it crosses a window 2m long in 0.1sec. how much time does the stone take to reach the lower end of window from roof?
Saturday, August 20, 2016 by RHYTHUM

physics
how much work is done when 100 kg lifted 5 meters above the ground
Friday, August 19, 2016 by sol

physics
The force exerted by two identical point charges on each other is 0.21 N. (a) Find the magnitude of the charge on each point charges.
Friday, August 19, 2016 by electric charge and electric field

Physics
Consider the box being pulled across the horizontal surface again. If the box has a mass of 10kg, the coefficient of friction is 0.25,the distance that the box is pulled is 5m, the force is 150N and the angle is 30 degrees, ehat was the initial speed of the box if the final ...
Friday, August 19, 2016 by Aishah

Physics
A metro train starts from a station with an acceleration of 2 m/s2 for 8 seconds. It then runs for 12 seconds with the speed acquired. Finally, it retards at a uniform rate of 4 m/s2 and stops. Find the distance travelled.
Friday, August 19, 2016 by Iffath

Physics
A particle covers an angle of 120¡ã while moving along the circumference of a circle. Find distance and displacement.
Friday, August 19, 2016 by Prabhat

physics
a body is at equilibrium under the action of three forces.one force is 10N acting due east and one is 5N in the direction 60¡ã northeast . what is the magnitude and direction of the third force
Friday, August 19, 2016 by hamza

physics
If half life of iodine 131 is 8 days, how much from 32g remain after 40 days (5 half lives).
Friday, August 19, 2016 by henry

Physics
Heat of 30 kcal is supplied to a system and 4200j of external work is done on the system so that it's volume decreases at constant pressure.what is the change in its internal energy (J=4200 j/kcal)
Thursday, August 18, 2016 by Shaik Tanaaz

physics
A spelunker is surveying a cave. She follows a passage 140 m straight west, then 250 m in a direction 45∘ east of south, and then 280 m at 30∘ east of north. After a fourth unmeasured displacement, she finds herself back where she started. for the last displacement...
Wednesday, August 17, 2016 by welp

Physics
A ball is thrown vertically upwards from the ground and it reaches a height of 20m. Calculate the speed the ball had when it was launched. I don't know how to solve this due to the fact that in the problem we only have the height as data , not even mass.
Wednesday, August 17, 2016 by Naty

Physics
A particle executing simple harmonic motion of amplitude 5 cm and period 2 s. Find the speed of the particle at a point where its acceleration is half of its maximum value
Wednesday, August 17, 2016 by Anushka

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
Wednesday, August 17, 2016 by john

Physics
the center of gravity of a 100-g stick is located at 50 cm mark and the stick is supported at 60cm. mark, Where must an 80g object be hung in order to have equilibrium?
Wednesday, August 17, 2016 by Nelcilyn

physics question
For a science fair competition, a group of high school students built a kicker -machine that can launch a golf ball from the origin with a velocity of 11.2m/s and initial angle of 31.5° with respect to the horizontal. a) Where will the golf ball fall back to the ground? b...
Wednesday, August 17, 2016 by himel

physics question
Your friends car is parked on a cliff overlooking the ocean on an incline that makes an angle of 17.0° below the horizontal. The brakes fail, and the car rolls from rest down the incline for a distance of 29.0m to the edge of the cliff, which is 55.0m above the ocean, and...
Wednesday, August 17, 2016 by himel

physics question
Same rental cars have a GPS unit installed, which allows the rental car company to check where you are at all times and thus also know your speed at any time. One of these rental cars is driven by an employee in the company's lot and during the time interval from 0 to 10s...
Wednesday, August 17, 2016 by himel

physics question
A man in search of his dog drives first 10 mi northeast, then 12 mi straight south, and finally 8 mi in a direction 30 degree north of west . What are the magnitude and direction of his resultant displacement?
Wednesday, August 17, 2016 by himel

physics question
In a projectile motion, the horizontal range and the maximum height attained by the projectile are equal . A) what is the launch angle? B) If everything else slays the same , how should the launch angle, ¦È0, of a projectile be changed for the range of the ...
Wednesday, August 17, 2016 by himel

physics question
A rocket-powered hockey puck is moving on a (friction-less) horizontal air-hockey table. The x- and y-components of its velocity as a function of time are presented in the graphs below. Assuming that at t=0 the puck is at (X0,Y0)=(1,2), draw a detailed graph of the trajectory ...
Tuesday, August 16, 2016 by himel

physics question
Two cannonballs are shot in sequence from a can-non, into the air, with the same muzzle velocity, at the same launch angle. Based on their trajectory and range, how can you tell which one is made of leand and which one is made of wood. If the same cannonballs where launched in...
Tuesday, August 16, 2016 by himel

physics question
A ball is thrown straight up by a passenger in a train that is moving what a constant velocity. Where would the ball land —back in his hands, in front of him, or behind him? Does your answer change if the train is accelerating in the forward direction? if yes, how?
Tuesday, August 16, 2016 by himel

physics math
MULTIPLE -CHOICE QUESTION A baseball is launched from the bat at an angle θo = 30° what respect to the positive x-axis and with an initial speed of 40 m/s ,and it is caught at the same height from which it is was hit. Assuming ideal projectile motion (positive y-axis ...
Tuesday, August 16, 2016 by himel

physics math
A cruise ship moves southward in still water at a speed of 20.0 km/h, while a passenger on the deck of the ship walks toward the east at a speed of 5.0 km/h .The passengers velocity with respect to Earth is?
Tuesday, August 16, 2016 by himel

physics math
A Projectile is launched from the top of a building with an initial velocity of 30m/s at angle of 60° above the horizontal. The magnitude of its velocity at t= 5 s after the launch is
Tuesday, August 16, 2016 by himel

Physics
The earth has a radius of 6380 km and turns around once every 24 hours. What is the average speed of a person resting at the equator?
Tuesday, August 16, 2016 by Jamhie

Physics
the center of gravity of a 100-g stick is located at 50 cm mark and the stick is supported at 60cm. mark, Where must an 80g object be hung in order to have equilibrium?
Tuesday, August 16, 2016 by Chen

physics
A Gardner moves a lawn roller through a distance of 100 m . with the force of 50 Newton . calculate his wages if he is to be paid 10 paise for doing 25 joules of work . it is given that the force is inclined at 60^°in the direction of motion.
Tuesday, August 16, 2016 by Arzoo

Physics
A spherical conductor has a radius of 4mm. What is the volume of this conductor in liter? Note: v= 4/3Πr3 where r = radius *pie na and exponent na ang 3
Tuesday, August 16, 2016 by Ydnew

Physics
A spherical conductor has a radius of 4mm. What is the volume of this conductor in liter? Note: v= 4/3 pie exponent of 3 where r = radius
Tuesday, August 16, 2016 by Ydnew

physics
a stonne dropped from a cliff, takes 3.0secs to reach the sea. how high is the cliff?
Monday, August 15, 2016 by amaka

physics
A 500g ball moving at 72 km/h is stopped by a player in 2 sec calculate a) initial and final momentum b) force applied by the player
Monday, August 15, 2016 by natasha

Physics 11
A mass of 10 kg, initially at rest on a horizontal frictionless surface, is acted upon by a horizontal force of 25 N. The speed of the mass after it has moved 5.0 m is: . a)  5.0 m/s 
 . b)  10 m/s 
 . c)  15m/s 
 . d)  125 m/s 
 . e...
Monday, August 15, 2016 by frank

physics
from the top of a tower which is 122.5 m high,a stone is thrown horizontally with a velocity of 5 m/s. what horizontal distance will be stone travel before hitting the ground
Monday, August 15, 2016 by jessielyn

Physics
acing cyclist is traveling at 15.3 km/h when she speeds up with a constant forward acceleration. After 5.00 s, her speed is 31.0 km/h. What is her acceleration? 3.14 km/h/s forward 4.90 km/h/s forward 23.2 km/h/s forward 27.0 km/h/s forward
Monday, August 15, 2016 by Brooklyn

Physics
Hi everybody! can anyone help me with this problem? HW9_2: BLOCK BETWEEN RIGID WALLS A cube L0 * L0 * L0 of isotropic linear elastic material (properties E and ν, with ν>0) is placed between two rigid frictionless walls at fixed distance L0 and compressed by a ...
Monday, August 15, 2016 by carolina02

physics
If a body is thrown upwards tends to go it to a height of 10mtrs.if initial velocity is doubled what will be the height reached
Sunday, August 14, 2016 by vinn

physics
a car whose brakes are locked skids to a stop in 100m from an initial velocity of 20m/s. find the coefficient of sliding friction
Sunday, August 14, 2016 by shiela

physics
A subway train starts from rest at a station and accelerates at a rate of until it stops at the next station. Find the distance covered. xtot=1800m
Sunday, August 14, 2016 by Light

physics
A Photon of energy 240 KeV is scattered by a free electron. If the recoil electron has a Kinetic energy of 190 KeV, what is the wavelength of the scattered photon?
Sunday, August 14, 2016 by priyanka

physics
A girl delivering newspapers travels 4 blocks west, 6 blocks north, then 6 blocks east. What is the magnitude of her resultant displacement? Answer in units of blocks.
Saturday, August 13, 2016 by talpal

physics
a 5kg ball is suspended by two strings one horizontally attached to a wall and one attached to the ceiling at a 35 degree angle, determine the tension in the slanted string, determine the tension in the horizontal string (you have to use a free body diagram).
Saturday, August 13, 2016 by bryan

physics
The speed of the bullet (m = 50g) and the speed of an electron ( m = 9.1 * 10-28g) are measured to be the same, namely 300 m/s, with an uncertainty of 0.01%. With what fundamental accuracy could we have located the position of each, if the position is measured simultaneously ...
Saturday, August 13, 2016 by priyanka

physics
Distance travelled by a ball dropped from a cliff in the 10th second.
Saturday, August 13, 2016 by Aniruddh

PHYSICS/SCIENCE
How much heat must be removed from 5.0g of water at 10°C to become ice at 0°C ? (my name is Kevin and I changed it to KPL cuz there is another kevin here)
Saturday, August 13, 2016 by KPL

Physics
an object falls from the beach 45 meters above the water it falls directly into a boat which moves at a constant speed that was initially 12 meters from the point of impact when the object was released what was the speed of the boat
Saturday, August 13, 2016 by Abibi

physics
steam point and ice point of a mercury thermometer are marked as 80 and 20 what will be the temperature in centigrade mercury scale at 32
Saturday, August 13, 2016 by abc school

PHYSICS/SCIENCE
How much heat must be removed from 5.0g of water at 10°C to become ice at 0°C ?
Saturday, August 13, 2016 by Kevin

Physics/Science
How much heat must be removed from 15.0g of water at 10°C to become ice at 0°C?
Saturday, August 13, 2016 by Kevin

physics
a transverse wave on a string travels with speed of 55m/s and has a wavelenght of 062m and an amplitude of 050cm. what is the maximum speed and maximum acceleration of a point on a string
Friday, August 12, 2016 by meriam sigauke

physics
Use the data below to draw a velocity-time graph. (5) NB: Consider Acceleration, constant speed, deceleration of the object. Time 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Velocity 15 17 19 21 21 21 31 41 51 50 49 48 47 46 45
Friday, August 12, 2016 by sakkeus

physics
a 20 kg crate is at rest on level ground a worker begins pushing horizontally on the crate with a force 300 Newtons, but the crate does not move determine the weight of the crate in both units of newtons and units of and units of pounds, determine the normal force acting on ...
Thursday, August 11, 2016 by Brad

physics
a woman who weighs 150 lb. on earth would weigh 340 lb. on another planet, what is her mass on earth, what is her mass on the other planet, what is the magnitude of the gravitational field on the other planet
Thursday, August 11, 2016 by Brad

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Homework Help: Science