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Physics
Page 39
Questions (147,502)
A uniform metre rule is ab is pivoted 30cm from end a. It balances horizontally when a weight of 5n is hug at a.calculate the
4 answers
asked by
Womoli
467 views
The bending moment M of the beam is given by dM/dx= -w(l-x) where w is a constant
Determine of M. Given M = ½ wt^2 when x=0
3 answers
asked by
sama
1,133 views
If 1000. J of heat energy are removed from 100. G of water at 35.0 degrees Celsius, what is the final temperature of the
4 answers
asked by
Kay
840 views
The level of sound V in decibels with an intensity I can be models by V=10log(I/10^-16) where I is intensity watts per
4 answers
asked by
Happy
932 views
Four point charges are located at the corners of a square with sides of length a. Two of the charges are +q, and two are -q.
3 answers
asked by
need help
2,462 views
A 15.0cm object is placed 60.0cm from a convex lens which has a focal lenght of 15.0cm use the thin lens equation to find the
4 answers
asked by
maria
2,793 views
The speed limit on a certain highway is 72km/h. What is the speed in cm/s?
Could you go through each step on how to get the
7 answers
asked by
Kelsi
1,765 views
A 2.0 micro farad capacitor in a circuit in series with a resistor of .0 MOhms is charged witha 6.0V battery. How long would it
4 answers
asked by
Julie Calder
1,581 views
consider the following: A point on the tip of a tuning fork vibrates in harmonic motion described by the equation d=10sin(ωt).
1
4 answers
asked by
Help
2,881 views
Suppose you are standing in the aisle of a bus traveling along a straight road at 100km/h, and you hold a pencil still above
4 answers
asked by
Anne
1,867 views
What observation led scientists to postulate the existence of photons?
A) electrons in atoms emitting energy only in certain
4 answers
asked by
Help me pls FAST
861 views
The time needed for a water wave to change from the equilibrium level to the crest is 0.20 s.
(a) What fraction of a wavelength
3 answers
asked by
homie
547 views
A body of mass 15kg is placed on a smooth plane which is inclined at 60° to the horizontal. Find:
a)the acceleration of the body
4 answers
asked by
Megan
1,412 views
If I made an electromagnet what would the variables be. controlled, dependent and independent
3 answers
asked by
Mia
828 views
A body is projected at an angle of 30degree to the horizontal with a velocity of 150metre per seconds.Calculate the time it
4 answers
asked by
scott
1,851 views
A scuba diver must decompress after a deep dive to allow excess nitrogen to exit safely from his bloodstream. The length of time
4 answers
asked by
phillip
619 views
A flywheel of moment of inertia 0.32 kgm^2 is rotated steadily at 120rad/s by a 50 W electric motor. (i)find the kinetic energy
4 answers
asked by
Edwin
4,663 views
soo for physics, we did a lab where we launched a cart on a track on the floor and recorded time, distance, etc. to figure out
4 answers
asked by
student
1,820 views
Two bumper cars collide. Both cars stop. How do you know that a force has acted on both cars?
did the cars change velocity? (yes,
4 answers
asked by
Nick
1,638 views
What is the best description of thermal energy?(1 point)
Responses Thermal energy is kinetic energy. Thermal energy is kinetic
3 answers
asked by
no name
328 views
Describe an experiment to show that the saturation vapour pressure of water at its boiling is equal to the air pressure on its
4 answers
asked by
Stella
296 views
A metal weighs 20N in air and 12N in water,calculate the relative density of the metal
4 answers
asked by
Anonymous
404 views
Distinguish between real and apparent cubic expansivity of a liquid.A glass bottle full of Mercury has mass 500g an being heated
4 answers
asked by
Mamshep Joseph Ponmwa
1,774 views
a woman stands at the center of a platform. the woman and the platform rotate with an angular speed of 5.00 rad/s. friction is
3 answers
asked by
Remie
1,432 views
A 30 N crate is submerged in water. The amount of buoyant force acting on the crate is 25 N. What will the crate do?
The crate
5 answers
asked by
dianni
2,490 views
what would happen to the number of rotations if the circumference of the tire were increased by 20%
what would happen to the
4 answers
asked by
Stacy B.
1,173 views
Two children push on opposite sides of a door during play. Both push horizontally and perpendicular to the door. One child
3 answers
asked by
stephanie
1,615 views
When “superballs” sprang upon the scene in the 1960’s, kids across the United States were amazed that these hard rubber
4 answers
asked by
Clark
1,035 views
An insulated beaker contains 300g of water initially at 30 degree celsius. water at 100 degree celsius is added until the
4 answers
asked by
annie
2,708 views
Two bodies a and b masses 4kg and 2kg move towards each other with velocities 3m/s and 2m/s and collide. If the collision is
3 answers
asked by
wealth
1,362 views
Two people take identical jet skis across a river, traveling at the same speed relative to the water. Jet ski A heads directly
3 answers
asked by
Johnathan
1,086 views
identify three devices that convert electrical energy into light, and give an advantage and disadvantage of each one.
3 answers
asked by
Scout
1,220 views
A ball is thrown horizontally from the top of a cliff 20m high. If the initial horizontal velocity is 8.0m/s,find how long it
4 answers
asked by
Abigail
1,787 views
You need to siphon water from a clogged sink. The sink has an area of 0.36 and is filled to a height of 4.0 . Your siphon tube
3 answers
asked by
kelsi
4,604 views
Physics A Semester Online Practice
1. A wall measures 4.20 m ± 0.01 m by 3.10 m ± 0.02 m. What is the approximate percent
2 answers
asked by
Anonymous
405 views
A uniform metre rule balances on a knife edge at the 60cm mark when a weight of 20N is suspended at one end. Calculate the
3 answers
asked by
Sheiyla
160 views
A softball player tosses a ball into the air with an initial velocity of 11.0 m/s, as shown in the diagram. What will be the
3 answers
asked by
hind mohammed
616 views
What is the specific heat of lead if 13.6 cal are needed to raise the temperature of 35.6 g Pb by 12.5 LaTeX: ^\circ∘ C ? Your
4 answers
asked by
???
822 views
A uniform road AB of mass 6g is balanced horizontal about a knife edge at a distance of 3cm from end A where a mass of 8g is
4 answers
asked by
fadhili
775 views
A train travelling at 20m/s undergoes a uniform retardation of 2m/s(square) when brakes are applied calculate the time taken to
4 answers
asked by
johnlarryojukokobishop
1,923 views
On a frozen pond, a 10 kg sled is given a kick that imparts to it an initial speed of 6.2 m/s. The coefficient of kinetic
3 answers
asked by
luma
4,022 views
A ball is thrown straight up from the top of a building 148 ft. tall with an initial velocity of 72 ft per second. The distance
s
3 answers
asked by
Reagan
1,463 views
Please do an e.g for me by Calculate the force required to move a small piston that has an area of 2m,if the force of a large
4 answers
asked by
Clendar
1,053 views
A fast-moving superhero in a comic book runs around a circular, 70-m-diameter track five and a half times (ending up directly
4 answers
asked by
Leanna
3,289 views
Electricity may be generated by rotating a loop of wire between the poles of a magnet. The induced current is greates when:
a.Pla
4 answers
asked by
Annie
2,535 views
A uniform rod of mass of 120g and a length of 130cm is suspended by a wire from a point 80cm from the rods left end . What mass
4 answers
asked by
Anonymous
250 views
how do i draw a simple particle diagram to show how ear defenders will work
13 answers
asked by
fred
2,115 views
An object weighting 300 N is suspended by means of two cords. (There is a cord on the ceiling with is at 45 degrees. The second
3 answers
asked by
me
1,658 views
An object with a mass of 0.75 kg is projected over a horizontal surface with a speed of 2.5 m/s. It then comes to rest after 3.0
3 answers
asked by
Stefan
155 views
A Motorcycle Jump. You are planning to make a jump with your motorcycle by driving over a ramp that will launch you at an angle
1 answer
asked by
Joe
257 views
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