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Two blocks are connected by a string as shown. The inclination of the ramp is θ = 36° while the masses of the blocks are m1 =
4 answers
asked by
anonymous
4,184 views
how large a force is required to accelerate a 1300kg car from rest to a speed 20m/s in a distance of 80m?
4 answers
asked by
jayson
2,471 views
an astronaut on a strange planet can jump a maximum horizontal distance of 15m if his initial speed is 3m/s. what is the free
4 answers
asked by
amlakinesh
2,324 views
A power company transmits current through a 240,000 V transmission line. This voltage is stepped down at an area substation to
3 answers
asked by
Alex
332 views
A space shuttle has a mass of 110 kg with her space suit on. She is on a spacewalk and takes up a full can of spray with a mass
4 answers
asked by
Bob
616 views
A water wheel at a mill has a
radius of 4.97 m, and generates 4530 N*m of torque. If the water pushes tangent to the edge, how
3 answers
asked by
mal
535 views
A 9V battery is connected to a circuit wired in parallel. The resistors are 4 ohms, 8 ohms, and 6 ohms. What is the equivalent
3 answers
asked by
Cameron
530 views
How much force is required to accelerate a 150 kg motorbike from 10 m/s to 20 m/s over a distance of 25 m? (assume no friction)
3 answers
asked by
s
187 views
calculate the quantity of hear required to raise temperature of 1g of ice from _10c°?
1 answer
asked by
Anonymous
110 views
A girl throws a rock horizontally, with a velocity of 10 m/s, from a bridge. It falls 20 m to the water below. How far does the
1 answer
asked by
vfgfj
157 views
When a 25ml bottle full of liquid at 20°c is Heated to100°c ,5ml of the liquid was expelled from the bottle ( density remains
1 answer
asked by
Edem, otobong udeme
98 views
when temperature increases from t to # t and the moment of inertia is increase from I to #I. the coefficent of linear expansion
1 answer
asked by
Anonymous
359 views
A body of mass 10 kg is attached to a wire 30 cm long. Area of cross section of the wire is 10 raise to power -6 metre square.
2 answers
asked by
bhai
496 views
a motor car of mass 800kg travelling at 20m/s is brought to rest by breakes in 100m.calculate the average breaking force
5 answers
asked by
feyonce
2,688 views
1.A certain spacecraft is 3.3 AU (Astronomical Units) from Earth. How long in seconds does it take for a signal to reach the
1 answer
asked by
jere
709 views
IF a particular galaxys has a total mass of 10 to the 56 grams and the average star in that galaxy has a mass of 10 to the 35
4 answers
asked by
arias
1,426 views
A particular spiral galaxy can be approximated by a thin disk-like volume 35 Thousand Light Years in radius and 8 Hundred Light
1 answer
asked by
humbrey
463 views
A particular spiral galaxy can be approximated by a thin disk-like volume 35 Thousand Light Years in radius and 8 Hundred Light
2 answers
asked by
Space problem, show work
737 views
An object is projected at an angle of elevation of 45 degree with a velocity of 100 m/s calculate its range
1 answer
asked by
tsering
429 views
a uniform meter bar of mass 120kg is sup ported on two knife edges 30cm from its center, with a diagram calculate the reactions
1 answer
asked by
David
448 views
a body British moving with a velocity of 20ms(power -1) collides with another body A, moving in the same direction on the same
2 answers
asked by
David
536 views
a truck of mass 5000kg is used to tow a jeep of mass 2500kg, the truck moves with a speed of 3.0ms(power -1) just before the
1 answer
asked by
David
487 views
blood is pumped from the heart at a rate of 5.0l/min into the aorta (radius 1.0cm)determinethethe speed of the blood
2 answers
asked by
moni
899 views
A small dog is trained to jump straight up a distance of 1.2 m. How much kinetic energy does the 7.2-kg dog need to jump this
4 answers
asked by
sophia
610 views
The energy source used to produce most of the electrical energy in the United States
3 answers
asked by
sophia
355 views
can you graph this for me?
In heavy rush-hour traffic you drive in a straight line at 12 m/s for 1.5 minutes, then you have to
1 answer
asked by
ana22
884 views
Blood flows through a major artery at 1.3 m/sfor 0.40 s, then at 0.70 m/sfor another 0.40 s through a
smaller artery. Part A Is
1 answer
asked by
hi
604 views
A stationary skateboarder I with a mass of 50 kg pushes a stationary skateboarder II with a mass of 75 kg. After the push the
4 answers
asked by
keven
3,103 views
two balls are dropped in a vacuum. if one is caught in half the time as the other what is the difference in distance the balls
4 answers
asked by
Anonymous
1,503 views
a body of mass 65kg falls freely from rest through a height of 50m find the average force exerted by the ground to bring the
2 answers
asked by
alex chidera
512 views
A 0.32 kg box of macaroni is held in place at the front of a 3.14 kg shopping cart only by the force of static friction as the
4 answers
asked by
camilla
2,353 views
a car moving at speed of 5 m/s ,accelerates at a constant rate of 2.50 m/s^2 for 5.00s . what is the car final speed
2 answers
asked by
Dazhani Jarrett
664 views
A star the size of our Sun runs out of nuclear fuel and, without losing mass, collapses to a white dwarf star the size of our
3 answers
asked by
clara
892 views
A 10-kg disk-shaped flywheel of radius 9.0 cm rotates with a rotational speed of 320 rad/s.
Determine the rotational momentum of
2 answers
asked by
clara
781 views
A cricket ball travelling north at 100km/h is deflected so that it travels north-east at 100km/h. What is the change in velocity
1 answer
asked by
Xy
403 views
During an episode of turbulence in an airplane you feel 180 N heavier than usual.
Part A If your mass is 86 kg, what are the
2 answers
asked by
ana
535 views
A 9.8-kg monkey hangs from a rope, as shown in (Figure 1) . The tension on the left side of the rope is T1 and the tension on
4 answers
asked by
anonymous
1,789 views
A stone of mass 2.8kg is projected upward with a speed of 5m/s. calculate the maximum height reached. use g=10m/s square.
4 answers
asked by
Mawatta
452 views
A pulley system of 4 pulleys is used to raise a loan of mass 50kg vertically,if its effeciency is 80%,determine the minimum
4 answers
asked by
Abba
1,494 views
How do you draw a force diagram for an object that is tied to a pole and is moving in a constant circular direction?
1 answer
asked by
homework
362 views
A typical magnitude of the external magnetic field in a cardiac catheter ablation procedure using remote magnetic navigation is
1 answer
asked by
Sam
620 views
Driving in your car with a constant speed of v= 22 m/s, you encounter a bump in the road that has a circular cross-section, as
2 answers
asked by
ani
536 views
A stone of mass 5kg is thrown vertically upwards with velocity 10ms final calculate the height.
3 answers
asked by
Aisha haruna
802 views
what is the work done in moving a positive charge 12UC across two points 6cm apart
1 answer
asked by
Vibez
422 views
a) a driver of mass 55kg needs to jump to a height of 1.1m above her take off height, at which point her speed needs to be
1 answer
asked by
alex
335 views
a stone attached to the end of elastic string is whirled around in a circular path of radius 20cm if the stone makes 15 complete
4 answers
asked by
isah a
1,434 views
How long would it take a 750W electric motor to do 1.5x10^5 of work
What I have so far: So we know w=pxd 1.5x10^5=750xd So we can
3 answers
asked by
amy
464 views
Initially sliding with a speed of 4.1 m/s, a 1.8 kg block collides with a spring and compresses it 0.37 m before coming to rest.
4 answers
asked by
ani
4,148 views
A 37.0 g ice cube at -15.0 degreesC is placed in 224 g of water at 48.0 degreesC. Find the final temperature of the system when
2 answers
asked by
idali
509 views
I am looking out a window that is 1.3m tall. A water balloon suddenly drops across the entire length of the window in .22
1 answer
asked by
Abdul Ganiyu
464 views
A 75.0 kg person bends his knees and then jumps straight up. After his feet leave the floor, his motion is unaffected by air
1 answer
asked by
kim
476 views
A 75.0 kg person bends his knees and then jumps straight up. After his feet leave the floor, his motion is unaffected by air
1 answer
asked by
kim
595 views
1. a) using heat exchange and conservation of thermal energy determine the specific latent heat of fusion for ice.
b) determine
2 answers
asked by
Amy
725 views
A long, cylindrical conductor of radius R carries a current I as shown in the figure below. The current density J, however, is
1 answer
asked by
Sam
868 views
What mass of hot water at 70 degrees C must be added to 2000g of cold water at 5 degrees C to raise it's temperature to 20
3 answers
asked by
alex
454 views
1.5 kg of an unknown liquid at a temperature of 17 degrees Celsius is added to 2kg of water at 50C. The final temp of the
2 answers
asked by
tristan
517 views
How much heat is required to convert 3kg of ice at -5 degees C into steam at 125 degrees C?
4 answers
asked by
angelina
1,496 views
A coil has an inductance of 9.00 mH, and the current in it changes from 0.200 A to 1.50 A in a time interval of 0.300 s. Find
4 answers
asked by
Sam
3,340 views
A metal rod of mass m slides without friction along two parallel horizontal rails separated by a distance L and connected by a
3 answers
asked by
Sam
1,949 views
a helicopter lifts a 72kg astronuat 15m vertically from the ocean by means of a cable. the acceleration of the astronuat is
2 answers
asked by
pema
728 views
Find the coordinate of the center of mass of the bricks shown in the figure.(Figure 1)
Express your answer in terms of L.
3 answers
asked by
anonymous
1,463 views
When the play button is pressed, a CD accelerates uniformly from rest to 420 rev/min in 5.0 revolutions.
Part A If the CD has a
4 answers
asked by
ani
3,675 views
A cat walks along a plank with mass M= 7.00 kg. The plank is supported by two sawhorses. The center of mass of the plank is a
1 answer
asked by
sinti
959 views
A source delivers an AC voltage of the form Δv = (89.0 V) sin (70πt), where Δv is in volts and t is in seconds, to a
1 answer
asked by
Sam
801 views
how do i find the horizontal velocity (m/s) when i have the angle, the time, and horizontal range?
1 answer
asked by
homework
396 views
When a guitar string is sounded against a 440Hz note, 12 beats are heard in 2.0s.
a) what are the possible frequencies of the
2 answers
asked by
alex
754 views
a destroyer sends out a sonar pulse that returns from a submarine in 1.68s. if the spped of sound in the sea of water is
2 answers
asked by
amy
543 views
A fighter jet is flying at Mach 3.2 in air of temperature 2 degrees C. What is the planes speed?
I really don't understand how to
4 answers
asked by
emily
776 views
Red light with a wavelength of 7.0x10^-7 m travels at a speed of c. When it enters glass it's speed is reduced to 2.0x10^8 m/s.
6 answers
asked by
emily
988 views
Determine the frequency of the note F4, 5 Seminotes above middle c (C4=261.6Hz)
So would it be C4 = 261.6Hz x 1.05946^5 The fact
1 answer
asked by
emily
343 views
Someone drops a ball from the roof of your building.The ball drop past your window. It takes time T to pass the window's height.
3 answers
asked by
umma
611 views
An object is launched at an angle of 78º above the horizontal with an initial speed of 120 m/s. Find (a) the maximum altitude
3 answers
asked by
Donavan
534 views
a simple pendulum has a period of 2.0s and magnitude of swing 5cm.find i-the velocity of the bob ii-the acceleration of the bob
2 answers
asked by
Usman
677 views
Consider a drop of mass 1g falling from a height 1km.what is work done by gravity?
2 answers
asked by
Swati
502 views
Block A (mass = 3 kg), moving at +5 meters per second, collides with stationary block B (mass = 4 kg). Block A comes to a sudden
3 answers
asked by
Rachel
653 views
a cube of side 6cm is placed in graduated measuring cylinder 20 ml of watercis then added and the cubes remains at the bottom of
6 answers
asked by
question
818 views
A boat crosses a river of width 174 m in which the current has a uniform speed of 1.13 m/s. The pilot maintains a bearing (i.e.,
2 answers
asked by
vero
634 views
Why is that a lighter object with the higher velocity produces a higher kinetic energy than a heavier object with lower velocity
1 answer
asked by
Riley
422 views
Two boxes are connected by a cord running over a pulley. Box A is on a table and Box B is hanging off of the pulley. The system
4 answers
asked by
Riley
1,323 views
An object with a height of 12cm is placed 4cm in front of a concave mirror whose radius of curvature is 16cm.
2 answers
asked by
Aaron Mallobe
522 views
A ball is dropped downward after 1 sec its velocity is 20m/s another ball is dropped from the same point after 2 sec its
1 answer
asked by
Anonymous
331 views
One second after being thrown straight down an object is falling with a speed of 20m/s. How fast will it be falling 2 seconds
3 answers
asked by
hania
1,443 views
Good chocolate is designed to melt at 34°C. A chocolate bar, originally frozen to a temp of -115°C, has its thermal energy
4 answers
asked by
Kayla
1,287 views
A plane is in a steep downward plunge. To not crash, captain Q pulls as much as he can. When the plane is at the lowest point of
1 answer
asked by
riley
424 views
A plane is in a steep downward plunge. To not crash, Captain Q pulls as much as he can. When the plane is at the lowest point of
1 answer
asked by
Adam
467 views
A wheel has an initial speed of 100 radians/s. It is then slowed down with a magnitude of the constant angular acceleration of
3 answers
asked by
Adam
325 views
how many 0.25-pF capacitors must be connected in parallel in order to store 1.2uC of charge when connected to a battery
4 answers
asked by
samsoonie
823 views
A 13.0 gram sample of an unknown metal at 30.0*C is placed in a Styrofoam cup containing 50.0 grams of water at 90.0*C.The water
2 answers
asked by
Annie
833 views
horizontal and vertical component of earth's magnetic field at a place are 0.22 tesla and 0.38 tesla respectively then find the
2 answers
asked by
Anonymous
760 views
A wheel has an initial velocity of 3.40rad/s and it rotates 1.25 revolutions before stopping
what is the angular acceleration of
3 answers
asked by
Riley
519 views
On planet Earth, a pendulum has a length of L and a period of T .On planet Mars, the pendulum has a length of 4L and period of
3 answers
asked by
Riley
770 views
Suppose that a body of an object is experiencing SHM ( simple harmonic motion) and it oscillates with position
2 answers
asked by
Adam
513 views
A particle is traveling counterclockwise in a circle of radius
r = 2.85 m. At some instant in time, the particle is located by
1 answer
asked by
Anonymous
665 views
calculate your average walking speed when you step 1.0 m in 0.5 s
3 answers
asked by
elisa
1,155 views
four masses of 2 kg,4kg,3kg, and 6 kg are kept at the corner of square ABCD are side 1 m then (A) find moment of inertia about
2 answers
asked by
Alok
532 views
A basketball is thrown at 8.00m/s [up] from a height of 2.00m and eventually comes back down to hit the floor. a)assuming a
3 answers
asked by
emily
801 views
A basketball is thrown at 8.00m/s [up] from a height of 2.00m and eventually comes back down to hit the floor. a)assuming a
1 answer
asked by
emily
429 views
15. During the opening kickoff of a college football game, the kicker kicks a football with an initial velocity of 27.5 m/s at
4 answers
asked by
emily
2,086 views
an airplane flying north is observed from the ground. it's velocity is 225 m/s north. the pilot who is flying the plane measures
2 answers
asked by
anna
652 views
Two forces whose resultant is 100newton are perpendicular to each other if one of them makes an angle of 60° with the
3 answers
asked by
lily
558 views
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