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Physics
Page 8
Questions (149,768)
The energy given off by 300 grams of an alloy as it cools through 50°C raises the temperature of 300 grams of water from 30°C
5 answers
asked by
jane
5,381 views
The drawing shows a student holding two negatively charged balloons.
What is most likely to occur if the student brings the
1 answer
asked by
6
183 views
A model rocket is launched from a roof into a large field. The path of the rocket can be modeled by the equation y = –0.06x²
5 answers
asked by
Sandra
3,887 views
A hydraulic lift office chair has its seat attached to a piston with an area of
11.2 cm2 . The chair is raised by exerting force
7 answers
asked by
Alexis
7,528 views
1.Which example represents a class 2 lever?(1 point)
tweezers plucking hairs salad tongs picking up salad a screwdriver opening a
30 answers
asked by
mia
10,636 views
Two missiles, 2420 km apart, are launched at the same time and are headed towards each other. They pass after 1.5 hours. The
5 answers
asked by
Jay
2,530 views
An airplane leaves Atlanta at 2 PM and flies north at 250 miles per hour. A second airplane leaves Atlanta 30 minutes later and
5 answers
asked by
Zara
4,993 views
find the mass of a cylindrical iron pipe 2.1m long and 12cm in external diameter,of the metal is 1 cm thick and of density
4 answers
asked by
Boye-Akelemor
483 views
X-ray technicians wear protective gear to keep them safe from the X-rays. Why are X-rays dangerous?(1 point)
Responses They have
4 answers
asked by
osihxbdy8cgbefgb8y
246 views
) A batter hits a baseball so that it leaves the bat at speed
Vo = 37.0m/s at an angle ao = 53.1°, at a location where g = 9.80
7 answers
asked by
hehe
26,915 views
A toy rocket has a mass 0f 350g at launch. The force it produces is 15N and it is fired at an angle of 65° to the horizontal.
10 answers
asked by
Joseph
5,821 views
A driver traveling at 50mph is 80m from a wall ahead. If the driver applies the brake
immediately at a reaction time of 2 seconds
4 answers
asked by
Abdikafi
7,644 views
A water-skier is being pulled by a tow rope attached to a boat. As the driver pushes the throttle forward, the skier
4 answers
asked by
Brookeneed
6,971 views
Starting from rest, a 4.0-kg body reaches a speed of 8.0 m/s in 2.0 s.
What is the net force acting on the body?
4 answers
asked by
Emily
11,545 views
Given a 10-V power supply, would a 20-ohm resistor and a 5-ohm resistor need to be arranged in parallel or in series to generate
16 answers
asked by
Abby
3,133 views
A simple wheel and axle is used to lift a bucket of water from a well the radii of the wheel and axle are 20cm and 4cm
5 answers
asked by
Rodas
3,175 views
Newton’s cradle is a contraption where metal balls hang from a frame. When one ball is pulled and released, the collision
44 answers
asked by
I NEED HELP FAST PLS!!!!!
2,868 views
a relative density bottle weight 20g when empty 80g when fill with water and 100g when with a liquid. find the relative density
7 answers
asked by
Anonymous
1,717 views
An object weighs 15N in air and 13N when submerged in water. What is the density of the object.
5 answers
asked by
Striker
6,454 views
A 45 kg girl is sitting on one end of a see-saw, 0.6 m away from the the pivot pt. How far away form the pivot pt must a 60 kg
4 answers
asked by
Hannah
4,708 views
A load of 100 lb is hung from the middle of a rope, which is stretched between two rigid walls 30 ft apart. Due to the load, the
4 answers
asked by
pinkmiming
7,032 views
A 100g sample of water at 90 degrees celsius is added to a 100g sample of water at 10 degrees celsius.
The final temperature of
5 answers
asked by
Shellby
6,206 views
What is the (absolute) pressure of a bulb? (to 3 s.f and in kPa)
(Patm = 101 kPa, ρwater = 1000 kg m−3) Height = 16.0cm what
4 answers
asked by
nina
1,215 views
A 1200 lb sleigh is pulled along a horizontal surface at uniform speed by means of a rope that makes an angle of 30 degrees
5 answers
asked by
Lian
3,941 views
Emily and Clare kick a soccer ball at the same time. Emily kicks it with a force of 120 N at an angle of 60 degrees and Clare
6 answers
asked by
Bobby
2,687 views
A 3.00 - µF and a 4.00 - µF capacitor are connected in series, and this combination is connected in parallel with a 2.00 - µF
5 answers
asked by
Nade
5,241 views
A load of 4N extends a spring by 10mm. What load would extend it by 15mm?
5 answers
asked by
Luyando
739 views
A density bottle has a mass of 70g when empty 90g when full of water and 94g when full of liquid x calculate a mass of water
6 answers
asked by
Miriam
2,254 views
A spring of natural length 30cm is stretched to 35cm by a load of 15N. Calculate the extension produced,the elastic constant of
5 answers
asked by
Anonymous
1,284 views
Assume that all of the mass of a bicycle wheel is concentrated at its rim. Such a wheel of mass 1.2 kg and radius 30 cm starts
5 answers
asked by
kelsey
3,322 views
Heat from burning a fuel is absorbed by a copper calorimeter. The calorimeter has a mass of 81.34 g and contains 200.0 g of
4 answers
asked by
lomonoyan
1,035 views
An airplane flying east at 360 km/h passes over Pearson airport 10 minutes before a second airplane flying south at 480 km/h
4 answers
asked by
Anonymous
698 views
a 3200-lb elevator cab is supported by a cable in which the maximum safe tension is 4000 lb. (a)what is the greatest upward
4 answers
asked by
esther
1,929 views
The angular speed of a larger pulley wheel (radius=15cm) is 50 rev./min. Find the angular speed of the smaller wheel
4 answers
asked by
Mary
1,468 views
A man travels along a square path each side of length 100m with a velocity of 40m/s,50m/s 40m/s and 50m/s respectively calculate
4 answers
asked by
adam
308 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
4,695 views
The mass of the roller coaster below is 80 kg. It starts from rest at a height of 30 m and reaches a speed of 20 m/s at point B.
4 answers
asked by
Heylee Green
1,014 views
Use the table of observations about the electric force between charged objects to answer the question.
Charge of Object 1 (C) +1
1 answer
asked anonymously
150 views
Which statement best describes the reflection of a wave is it a wave transfers its energy to a material wave passes through the
1 answer
asked anonymously
107 views
How does a flashlight illustrate the law of conservation of energy
1 answer
asked anonymously
93 views
Why is glass a good insulator?(1 point)
Responses The atoms in glass hold on tightly to their negatively charged particles. The
1 answer
asked by
baby weiner
92 views
In one to two sentences, describe the relationship between harmonics and resonance frequency in a piano.(2 points)
1 answer
asked by
aaagtuygy
74 views
2 cells, each of Emf 2v and internal resistance 0.5ohms are connected in series .they are made to supply current to a
1 answer
asked by
Comrade
165 views
a man 80kg carries a load of bricks of mass 20kg up a vertical ladder of length 6m what work has he done
7 answers
asked by
ISAAC
4,238 views
a 25ohm resistor connected in series with a coil of 500ohm resistance and 150mH inductance. What is the power factor of the
5 answers
asked by
student
6,303 views
The position of an object connected to a spring varies with time according to the expression x = (7.1 cm) sin (2.1π t). Find
(a)
4 answers
asked by
Tom
7,116 views
Which unit is used to measure force?(1 point)
11 answers
asked by
sebastian chapa
2,870 views
The cannon on a pirate ships shoots cannon balls with a speed of 350 m/s (the muzzle velocity). The cannon can be adjusted to
7 answers
asked by
Tyger2020
2,975 views
A 0.230-kg wooden rod is 1.55 m long and pivots at one end. It is held horizontally and then released.
1) What is the angular
4 answers
asked by
anonymous
3,937 views
A boat is travelling at 8.9km/h relative to the water in the river.The boat aims straight for the opposite bank of the river
6 answers
asked by
Has
1,360 views
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