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Physics
Page 38
Questions (146,380)
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
1,459 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
3,283 views
The pendulum on a cuckoo clock is 5.00 cm long. (a) Determine the period of this pendulum. (b) What is its frequency?
3 answers
asked by
Jason
2,286 views
A ball of mass 522 g starts at rest and slides down a frictionless track, as shown below. It leaves the track horizontally,
4 answers
asked by
Angela
6,770 views
in a making a graph showing the stretch of a spring:
Plot a graph of force vs. stretch. Find the slope. The Slope of the graph is
4 answers
asked by
Kriti
1,544 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
1,653 views
A student performs an experiment where he sends sound waves from the air through a solid, a liquid, and a gas. He records the
3 answers
asked by
Anonymous ;)
388 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 body accelerates uniformly from rest at 2ms-2. Calculate its velocity when it has traveled a distance of 9m
3 answers
asked by
gabby
539 views
You have several 36 ohm resistors and a 12 Volt battery.
d. When you connect one resistor to the battery, what is the current of
4 answers
asked by
hellp
1,096 views
A solenoid 10 turns per cm carries a current of 5A flowing through it. What is the magnetic field inside the solenoid?
5 answers
asked by
Raven
2,419 views
The efficiency to machine is 75% , if this machine raises a load of 150kg , through a vertical height of 20m,calculate the
4 answers
asked by
Olutunde
754 views
An electric motor is used to lift a load of bricks through a vertical height of 20m.the tension in the cable attached to the
3 answers
asked by
Wendy
742 views
Calculate the time it takes for a gamma ray to travel from the Sun to the Earth
Distance (mean) Earth to Sun=1.5 e11 m
3 answers
asked by
ted
1,028 views
A body rises vertically from the earth according to the law s = 64t – 16t2. If it has lost k times its velocity in its 48 ft
4 answers
asked by
Mithun
537 views
In the record setting race, a dragster reached a velocity of 145.08 m/s in 4.48s. What was the dragsters average acceleration?
4 answers
asked by
Mileena
1,086 views
The acceleration of a particle is defined by the relation a = -k/x . It has been experimentally determined that v = 15 ft/s when
3 answers
asked by
ccny
2,218 views
A car is moving along a straight road. The graph below shows how the speed
varies with time. "'0 W WCl. (/) time - Which of the
3 answers
asked by
Collins
1,469 views
1. At which position will the bar magnets most likely experience the least magnetic potential energy between them?
D - position 4
46 answers
asked by
ImLegit
17,489 views
The resistance of a coil copper wire at 20 degree celsius is 2.21 ohms. After a current of 10 amperes has been flowing in wire
3 answers
asked by
jun
1,357 views
A ball is dropped a high cliff, and two second later another ball was thrown vertically downwards with an initial speed of 30
4 answers
asked by
Anonymous
2,855 views
A cardiologist uses an ultrasound scanner with an operating frequency of 3.5 MHz that can detect Doppler frequency shifts as
4 answers
asked by
Sarah
930 views
The Alert Hiker: An alert hiker sees a boulder fall from the top of a distant cliff and notes that it takes 1.3s for the boulder
3 answers
asked by
Zalak
3,409 views
A boy drags a 100 N sled up a 20 degree slope at constant velocity. If the coefficient of friction between the sled and hill is
4 answers
asked by
amy
1,306 views
Two watermelons fall off a kitchen counter. The masses and speeds of the fruits are in the table. How do the kinetic and/or the
5 answers
asked anonymously
465 views
a 2 kg frictionless block is attached to an ideal spring with force constant 300N/m. At t=0, the spring is neither stretched or
3 answers
asked by
Anonymous
2,349 views
An electron is moving through a magnetic field whose magnitude is 8.70*10^-4 T. The electron experiences only a magnetic force
4 answers
asked by
Kelly
1,230 views
Low Earth orbiting satellites orbit between 200 and 500 miles above Earth. In order to keep the satellites at a constant
3 answers
asked by
Amie
2,080 views
To protect their crops during freezing temperatures, orage growers spray water onto the trees and allow it to freeze. In terms
4 answers
asked by
Judd
2,108 views
A coconut of mass 2kg is on a tree 5m tall.Determine the potential energy of the coconut at this height (take g=10ms^2)
4 answers
asked by
Nharnah
180 views
The weight in the following diagram has a mass of 0.50 kg and the cart has a mass of 0.26 kg. Friction is negligible. What is
3 answers
asked by
help
469 views
A 120-g chunk of 90 ∘C iron is dropped into a cavity in a very large block of ice at 0∘C. What is the mass of ice that
3 answers
asked by
Geovanni
1,388 views
Two point charges, q1 and q2, of 4.00 uc each, are placed -6.0 cm and 6.0 cm away from the origin on the x-axis. A charge q3 of
3 answers
asked by
Anonymous
1,028 views
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.
3 answers
asked by
n
1,175 views
A balloon filled with 3.5 L of helium at 20 °C and 3 atm. What will be the new pressure if its volume increases to 17.5 L at
3 answers
asked by
Anonymous
557 views
The potential at the surface of a sphere (radius R) is given by
V_0 = k cos 3theta where k is constant. Find the potential inside
3 answers
asked by
Kim
1,313 views
The cruising speed of a Boeing 767 in still air is 530 mph. Suppose that a 767 is cruising directly east when it encounters an
4 answers
asked by
Connie
1,227 views
Atom Ant is traveling with an initial velocity of 20.0 cm/s. He begins to accelerate at a rate of 8.00 cm/s2 for 5.00 s. What is
3 answers
asked by
Anonymous
1,024 views
Steel Phantom is a roller coaster in Pennsylvania that, like the Desperado in Nevada, has a vertical drop of 68.6m Suppose a
3 answers
asked by
Anonymous
2,023 views
A 64-kg boy and a 42-kg girl use an elastic rope while engaged in a tug-of-war on an icy frictionless surface. If the
3 answers
asked by
Hannah
967 views
the height , h(t) in metres of the trajectory of a football is given by h(t) = 2+28t-4.9t^2, where t is the time in flight, in
4 answers
asked by
Poppy
2,469 views
while watching ocean waves at the dock of the bay. otis notices that 10 waves pass beneath him in 30 seconds. he also notices
3 answers
asked by
charlie
1,290 views
If 100g of zinc (c=377J/kg degrees celcius) at 95 degrees celcius is dropped into 60g of water contained in a 100g calorimeter
2 answers
asked by
Mikky
784 views
"What happens to the energy associated with a wave after the wave has been damped out?"
I'm assuming all the energy is lost by
3 answers
asked by
Stuck
570 views
A shaft which rotates at 300r/min is uniformly accelerated to 600r/min in 15secs.Calculate:
(a) The angular acceleration. (b) The
2 answers
asked by
Ishola
482 views
A balloon originally has a volume of 4.39L
at 44 C and a pressure of 729 torr. What temperature must the balloon be cooled to to
4 answers
asked by
Anonymous
3,202 views
Two point charges 5Nc & -2NC are located at (2,0,4) & (-3,0,5) respectively.
(a) Determine the force on 1Nc point charge located
3 answers
asked by
Amusire
698 views
A simple machine with an effort of 30N lifted a load of 6N. Calculate the mechanical advantages
3 answers
asked by
Anonymous
546 views
Three objects A,B,C are placed 50.0 cm apart along a straight line. A and B have a mass of 10.0 kg, while c has a mass of 15.0
4 answers
asked by
anonymous
853 views
two resistors of 25 ohms and 5 ohms respectively are connected in series to a 240V supply calculate the value of a third
5 answers
asked by
Kirchhoffs
1,367 views
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