Sunday
August 28, 2016

Homework Help: Science: Physics

Recent Homework Questions About Physics

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

Vector , physics
In a regular hexagon ABCDEF prove that AB bar+AC bar +AD bar+AE bar+AF bar =6AO bar
Thursday, August 11, 2016 by Sindhuja

physics
a car moving with a speed of 50 km/hr can be spotted by breaks after at least 6m.If the same car is moving with a speed of 100km/hr the minimum stopping distance is? With solution
Thursday, August 11, 2016 by Anonymous

physics
a car moving with a speed of 50 km/hr can be spotted by breaks after at least 6m.If the same car is moving with a speed of 100km/hr the minimum stopping distance is?
Thursday, August 11, 2016 by Anonymous

physics
you are moving at 12m/s towards a mirror,what is the speed of your image?
Thursday, August 11, 2016 by ernest

Physics
Explain Why the pressure of a gas in a nitrogen container falls continuously when the gas is continuously taken away while the pressure of a gas in a chlorine container remains constant until nearly all the gas is withdrawn
Thursday, August 11, 2016 by Joel

physics
A cars starts from rest and after 20 seconds its velocity becomes 108 km-1 find the acceleration of the car
Wednesday, August 10, 2016 by hamza

physics
a particle at rest starts in horizontal strsight line with uniform acceleration ratio distance during 4th and 3rd sec ond
Wednesday, August 10, 2016 by thiru

physics
At a pressure 48 kPa, the gas in a cylinder has a volume of 15 liters. Assuming temperature remains the same, if the volume of the gas is decreased to 8 liters, what is the new pressure?
Wednesday, August 10, 2016 by quick help needed

Physics
Mass=2.20 T=10 Friction=0.400 Determine the acceleration when x=0.400m
Tuesday, August 9, 2016 by Ariola

physics
calculate the root mean square speed of nitrogen at 0 degree celcuis. Take the molecular weight of nitrogen M= 28*0.0010
Tuesday, August 9, 2016 by magayaki

Physics
Hi everybody! I really need help with this problem as soon as possible... SI SHAFT WITH VARIABLE SECTION The shaft BCD in the figure has length L and is composed of a homogeneous material with shear modulus G. The bar is fixed between walls at B (x = 0) and D (x = L). The ...
Tuesday, August 9, 2016 by anna_lau

physics
A substance has a melting point of 800ºC and a boiling point of 1465ºC. The substance is most likely A. water. B. hydrogen. C. gold. D. table salt. D?
Tuesday, August 9, 2016 by quick help needed

physics
what is the maximum torque on a rectangular coil 5 cm x 12 cm and with 600 turns when carrying a current of 0.0700A in a uniform field with magnitude 0.300T?
Monday, August 8, 2016 by alan

Physics
If the ball moves through the air for 3.2 seconds, what is the horizontal distance traveled by the ball? Round your answer to the nearest tenth
Monday, August 8, 2016 by Briana

Physics
(a) Find the electric field at x = 5.00 cm in Figure 18.52(a), given that q = 1.00X10^-6;C . (b) At what position between 3.00 and 8.00 cm is the total electric field the same as that for –2q alone? (c) Can the electric field be zero anywhere between 0.00 and 8.00 cm? (d...
Monday, August 8, 2016 by Elizabeth

physics
The stiffness of an elastic substance is 700N/m calculate the extension of the substance when the load of 25 kg hang on it (g is 9.8m/s squred)
Monday, August 8, 2016 by oluwabunmi

Physics
A pump of 200 W power is lifting 2 kg water from an average depth of 10 meters per second. Find the velocity of water delivered by the pump?
Monday, August 8, 2016 by Deepen

physics
. A ball is thrown so that it just clears a 10 feet fence 60 feet away. If it left the hand 5 feet above the ground and at an angle of 60° with the horizontal, what was the initial velocity of the ball?
Monday, August 8, 2016 by kathleen

Physics
A block slidly on a frictionless inclined plane if the block starts from rest to the top.Then,find the time to reach to the bottom and the velocity at the bottom
Monday, August 8, 2016 by Abawey

Physics
A 120-V rms voltage at 60.0 Hz is applied across an inductor, capacitor and a 100-Ω resistor in series. If the maximum value of the current in this circuit is 1.60 A, what is the rms value of the current in this circuit?
Sunday, August 7, 2016 by Lewis

physics
Water is a compound because it A. cannot be broken down into simpler substances. B. always has two hydrogen atoms for each oxygen atom. C. is made of water atoms joined together. D. both a and b A is wrong so is it D?
Sunday, August 7, 2016 by quick help needed

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?
Sunday, August 7, 2016 by quick help needed

physics
the time of flight of an object projected with speed 20m/s at an angle 30¡ã with the horizontal is
Saturday, August 6, 2016 by khushi

physics
If the mass of a material is 95 grams and the volume of the material is 14 cm3, what would the density of the material be? 6.785 g/cm3?
Friday, August 5, 2016 by quick help needed

physics
a boy uses a sling shot to launch a rock upward with a velocity of 30m/s how long does it take to reach a height of 20 m what maximum height does the rock reach, what is the velocity of the rock at this height, what is the velocity of the rock just before it lands
Thursday, August 4, 2016 by wayne

physics
an arrow is shot vertically upward 2 seconds later it is at an height of 42m (not necessarily the highest point) with what velocity was the arrow shot how long was the arrow in flight altogether
Thursday, August 4, 2016 by kent

physics
a person in a hot air balloon ascending vertically at a constant rate of 12mm/s drops a rock over the side when the balloon is 40m above the ground how long will it take the rock to reach the ground
Thursday, August 4, 2016 by kent

Physics
A bus accelerates uniformly from 8 M/s to 24 m/s in 4 seconds. What is the acceleration produced? Also calculate the distance covered by the bus during the given time?
Thursday, August 4, 2016 by Vitthal

Physics
a jet plane starts from rest with an acceleration of 3 m/s^2 and makes a run for 35 sec before taking off .What is the minimum length of the runway and what is the velocity of the jet at the take off ?
Thursday, August 4, 2016 by Abhijeet Jena

physics
If the mass of a material is 102 grams and the volume of the material is 21 cm3, what would the density of the material be?
Thursday, August 4, 2016 by quick help needed

physics
If the relationship between the manipulated variable and the responding variable is an inverse proportion, what will a line graph of this relationship look like? A. a straight line B. a curved line C. a jagged line D. none of the above B?
Thursday, August 4, 2016 by quick help needed

physics
Which of the following conversion factors would you use to change 18 meters to kilometers? A. 1000 m/1 km B. 1 km/1000 m C. 100 m/1 km D. 1 km/100 m A?
Thursday, August 4, 2016 by quick help needed

physics
2H2(g)+O2(g)-2H2O(g) Calculate the initial number of moles of oxygen gas and hydrogen gas
Wednesday, August 3, 2016 by Tumi Mokoena

Physics
A box weighing 450 Newtons is pulled along a level floor at an angle of 30 degrees with the floor.If the force of the rope is 260 Newtons.What is the coefficient of sliding friction for the surface?
Wednesday, August 3, 2016 by Salimata

physics 1
use these values of initial position and initial velocity in the following questions. Initial position 1.0 m above ground Initial velocity 6.3 m/s up.. What is the magnitude and direction of the acceleration as the ball goes up?
Wednesday, August 3, 2016 by kim clark

physics
A boxer is punching the heavy bag. The time of impact of the glove with the bag is 0.10 s. The mass of the glove and his hand is 3 kg. The velocity of the glove just before impact is 25 m/s. What is the average impact force exerted on the glove?
Tuesday, August 2, 2016 by anonymous

physics
A therapist is helping a patient with stretching exercises. She pushes on the patient’s foot with an average force of 200 N. The patient resists the force and moves the foot 20 cm toward the therapist. How much work did the therapist do on the patient’s foot during ...
Tuesday, August 2, 2016 by BT

Physics
Quentin is lifting a 10 kg dumbbell by pulling upward on it with a 108.1 N force. What is the acceleration of the dumbbell as a result of this force?
Tuesday, August 2, 2016 by BT

Physics
A boxer is punching the heavy bag. The time of impact of the glove with the bag is 0.10 s. The mass of the glove and his hand is 3 kg. The velocity of the glove just before impact is 25 m/s. What is the average impact force exerted on the glove?
Tuesday, August 2, 2016 by BT

Physics
A force of 35.0N is exerted onto a 12.0kg block and the block moves 42.0m. How much work is done?
Tuesday, August 2, 2016 by n

Physics
An 80.0 kg rollerblader is at rest at the top of a 100 m hill at a 7o incline. The coefficient of friction on the hill is 0.110. What is the roller blader's kinetic energy at the bottom of the hill?
Tuesday, August 2, 2016 by n

Physics
A coiled spring in a waist trimming excercise requires a force of 54N to compress it by 0.20.find the force constant of the spring
Tuesday, August 2, 2016 by Zaherah

Physics
Hi everybody! can someone please help me with this problem? The shaft ACB, of constant outer diameter 2R and length 2L, is fixed to walls at both ends A and B. The left half of the shaft (AC)is solid, while the right half (CB) is hollow, with an inner diameter 2R. The right ...
Tuesday, August 2, 2016 by mary_ann

Physics
A spiral spring is compressed by 0.04m. Calculate the energy stored in the spring if the force constant is 400N/m... pls I need help wif dis, detailed answers pls, tnx
Monday, August 1, 2016 by Okpe-Lewis A.L.H Emmanuella

physics
an arrow is shot vertically upward 2 seconds later it is at a height of 42m with what velocity was the arrow shot, how long is the arrow in flight altogether
Monday, August 1, 2016 by kevin

physics
a person in a hot air balloon ascending vertically at a constant rate of 12m/s drops a rock over the side when the balloon is 40m above the ground, what is the velocity of the rock just before it hits the ground, how long will it take the rock to reach the ground
Monday, August 1, 2016 by kevin

physics
a boy uses a slingshot to launch a rock with a velocity of 30m/s how long does it take it to reach a height of 20m,what maximum height does the rock reach, what is the velocity of the rock at this height, what is the velocity of the rock just before it lands
Monday, August 1, 2016 by scott

physics
the required takeoff speed for a large airplane is 180mi/hr(80m/s)the plane is capable of accelerating at a rate of 4m/s^2 assume the plane starts at rest, determine the minimum runway length required for this plane to safely take off, a smaller airplane requires a takeoff ...
Monday, August 1, 2016 by scott

Physics
a Particle in x-y plane with const acceleration of 1.5m/s sq. in the direction making an angle 37degree with x_axis. At t=0 the particle is at origin and its velocity is 8m/s along x axis.Find the velocity and the position of the particle at t=4sec.
Monday, August 1, 2016 by Ramakanth

Physics
Gravitational force is a -------- force. Fill in the blanks
Monday, August 1, 2016 by Vaibhav

Physics
A force of 100 N is applied straight down to lower a handle from 45˚ above the horizontal to 45˚ below it. The handle is 1 m long and the force is applied at its end throughout the motion. What is the rate of change of the moment as the angle of the handle moves? ...
Monday, August 1, 2016 by Nezam

physics
a car and a truck starts from rest at the same instant with the car is behind the truck initially at the same distance. the truck has a constant acceleration of 4 ft/s^2 and the car has an acceleration of 6 ft/s^2. the car overtake the truck after the truck travelled 150 ft. a...
Monday, August 1, 2016 by teph

physics
In the figure, the radius of the submerged cylinder is 10 cm. The height is 25 cm. The cylinder is made of Aluminum whose density is 2.7g/cm3 the water density is 1g/cm3 What is the buoyant force on the cylinder? Repeat the calculation if the object were inside Glycerin ( ...
Sunday, July 31, 2016 by willim

physics
In the figure, the radius of the submerged cylinder is 10 cm. The height is 25 cm. The cylinder is made of Aluminum whose density is the water density is What is the buoyant force on the cylinder? Repeat the calculation if the object were inside Glycerin ( density: 1.26g cm3
Sunday, July 31, 2016 by AA

physics
what do you understand by the statement density of gold is 19.6 gm/cm3?
Sunday, July 31, 2016 by SREEJA

Physics.
An electron in a hydrogen atom is revolving around the proton in a orbit of radius r and velocity v .find the current.
Sunday, July 31, 2016 by Sagnik

Physics
For a given velocity of projection from a point on a inclined plane , the maximum range down the plane is three times the maximum range up the incline. Then find the angle of inclination of the inclined plane.
Saturday, July 30, 2016 by ADITYA BABAR

Physics
What is physics
Saturday, July 30, 2016 by Val

Physics
A sled has 300 kg m/s of momentum at point A. At point B the momentum is 375 kg m/s after 2 sec. What force was applied to the sled?
Saturday, July 30, 2016 by BT

Physics
A 75 kg individual runs a 5 m/s and jumps onto a stationary 40 kg wagon. What is the speed of the wagon and individual?
Saturday, July 30, 2016 by BT

Physics
Emma is working in a shoe test lab measuring the coefficient of friction for tennis shoes on a variety of surfaces. The shoes are pushed against the surface with a force of 400 N, and a sample of the surface material is then pulled out from under the shoe by a machine. The ...
Saturday, July 30, 2016 by BT

Physics
Emma is working in a shoe test lab measuring the coefficient of friction for tennis shoes on a variety of surfaces. The shoes are pushed against the surface with a force of 400 N, and a sample of the surface material is then pulled out from under the shoe by a machine. The ...
Saturday, July 30, 2016 by BT

statistics
in a certain college 33% of the physics majors belong to ethnic minorities. if 8 students are selected at random from the physics majors what is the probability that more than 5 belong to an ethnic minority
Saturday, July 30, 2016 by bernie

physics
three equal charges each of 2.0×10^-6 are fixed at three corner of an equilateral triangle of side 5cm .find the coulomb force experience due to other two charges
Friday, July 29, 2016 by jelil

Physics
If a man walks 4 km east and then 5 km south. How far is he from the point where he started?
Friday, July 29, 2016 by Cathy

Physics
A ladder 9 meters long is place a wall t base 2 metera away. What is the height reach by the ladder?
Friday, July 29, 2016 by Cathy

physics
a rock is dropped from a height of 20m above the ground when it hits the ground it leaves a hole 10cm deep with what speed does the rock hit the ground, and what is the magnitude of the rock's deceleration after it hits the ground
Thursday, July 28, 2016 by kevin

physics
find the energy of an x-ray photon which can impact a maximum energy of 50 kev to an electron
Thursday, July 28, 2016 by priyanka

Physics
(a) A narrow beam of light containing yellow (580 nm) and green (550 nm) wavelengths goes from polystyrene to air, striking the surface at a 30.0º incident angle. What is the angle between the colors when they emerge? (b) How far would they have to travel to be separated ...
Wednesday, July 27, 2016 by Elizabeth

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Homework Help: Science