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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
7,589 views
A machine has a velocity ratio of 6 and an efficiency of 75%. Calculate the effort needed to raise a load of 90N
7 answers
asked by
Mojeed
2,830 views
How do the frequencies and the speeds of yellow light and blue light compare?(1 point)
Which of the following is the best answer?
25 answers
asked by
Iwannaknow
1,410 views
A spiral spring is compressed by 0.03m. Calculate the energy stored in the spring if its force constant is 300N/ m
11 answers
asked by
Tauda
5,595 views
State the physical quantities one has to measure in order to determine the young's modulus of a wire?
7 answers
asked by
Ashwariyya
3,090 views
Three capacitors, each of capacitance 120 pF, are each charged to 500 V and then connected in series. Determine (a) the
5 answers
asked by
Jobs
3,374 views
In each of three trials of an investigation, a single force is applied to a mobile. Each time, the mobile acquires a different
15 answers
asked by
Help
5,091 views
A baseball is thrown straight up into the sky. What type(s) of energy is (are) present when the baseball reaches the apex of the
6 answers
asked by
Can you help me pls
2,176 views
A satellite is cruising in a stable orbit around earth at a constant speed. Is the satellite accelerating? Why or why not can
5 answers
asked by
HELP ME PLEASE
1,659 views
Use Snell’s law to determine the index of refraction of a sample of glass if a light ray that strikes the glass from air at an
5 answers
asked by
Iwannaknow
536 views
A spiral spring is compressed by 0.04m.calculate the energy stored in the spring,if the force constant is 100Nm-1
6 answers
asked by
Taiwo
1,030 views
An engine has an efficiency of 25% and produces 2000J of mechanical work during one cycle. How much energy is transferred out of
5 answers
asked by
Gram
2,359 views
Which material provides resistance to the flow of electrons?
A. Silver B. Saltwater C. Salt crystals D. Copper A circuit has a
7 answers
asked by
Connections Academy
2,664 views
A packing crate of weight 50N is placed on a plane inclined at 35°from the horizontal. If the coefficient of static friction
7 answers
asked by
Siyam
1,018 views
What effort is exerted to lift a load of 150N with a machine having a velocity ratio of 3 and efficiency of 20%
4 answers
asked by
Ifedayo
1,373 views
Hi, the following is a problem that concerns angular momentum:
Modern hard drives spin very fast! The part that holds the data is
5 answers
asked by
Grace
1,872 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!!!!!
2,801 views
Owls communicate using long-wavelength hoots, while songbirds use short-wavelength tweets. Which of the sounds can be heard over
4 answers
asked by
Iwannaknow
403 views
A moving coil instrument has a resistance of 75 ohms and gives full scale deflection of 100 scale divisions for a current of
5 answers
asked by
Kate
2,132 views
At a busy street corner, the sound level is 75dB.
What is the intensity of sound there? (Take threshold of hearing
4 answers
asked by
Regina
2,900 views
A bus travels 80 km due south in 2 hours it then travels 100 km due west in 3 hours what is the average velocity of the bus
5 answers
asked by
Nati
1,561 views
The 200kg hammer of a pile driver is lifted 10 m. Find the potential energy of the system when the hammer is at this height
4 answers
asked by
James
2,589 views
A wire length 2m and radius 1mm is stretched by 25mm on application of a force of 1000N.Calculate the young modulus
5 answers
asked by
Rilwan
2,917 views
A force of 10 N causes aspring to extend by 20mm find the spring constant of the spring in N/m
12 answers
asked by
Anonymous
5,988 views
A cavity wall is made of bricks 0.1m thick with an air space 0.1m thick between them.
a) Assuming the thermal conductivity of
4 answers
asked by
Kayla
264 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
285 views
A Styrofoam bucket of negligible mass contains 1.75 kg of water and 0.450 kg of ice. More ice, from a refrigerator at -15.0
3 answers
asked by
Marthin
1,182 views
A uniform plank measures 2m long from it's end point A to point B. If the weight of the plank is 54N and it rests on a knife
4 answers
asked by
Blessed
671 views
Two forces 60n and 80n respectively act simultaneously at a point
5 answers
asked by
Ntokozo mazibuko
2,404 views
a) An electron starts at rest and accelerates through an electric field
established by a set of parallel plates with a potential
5 answers
asked by
JJ
1,841 views
A car of mass 760kg travels with a velocity of 14ms-1
If the brakes are applied,the car travels a distance of 55m before coming
4 answers
asked by
Alos
736 views
A student trying to calculate the parameters of a satellite orbit obtained a quantity Q which is related with the orbital radius
4 answers
asked by
Favour
371 views
which of the following best describes acceleration
*These are not the answer choices* 1. an object speeding up 2. an object
7 answers
asked by
SwimmerGirl
2,968 views
A body weighs 0.30N in air. 0.25N when fully immersed in water and 0.27N in a liquid. Calculate the relative density of the
5 answers
asked by
Rejoice
2,351 views
A uniform pencil AB weiging 40g can be balanced holizontally on a knife edge at 2cm at the end where a mass of 60g is hung from
7 answers
asked by
Miso
1,624 views
How does the total kinetic energy of a cannon and cannonball system change as the mass of the cannon increases and the energy of
5 answers
asked by
help
1,986 views
Which of the following statement best explains why your feet feels cold, when you stand on a slab of ice?
3 answers
asked by
Anurag
930 views
Monochromatic light of wavelength 435 nm falls on a slit of width 0.095 mm. The slit is located 85 cm from a screen. How far is
4 answers
asked by
Bacon
360 views
A body weight 0.3N in air,0.25N when fully immersed in water and 0.27N when fully immersed in liquid. calculate a. It's water
5 answers
asked by
Elias
463 views
A brass measuring rule is connected 15°c the volume obtain is measured with the rule at 35°c appear to be 841.4cm. What is the
5 answers
asked by
Umar
1,636 views
A meter rule is placed horizontally at a fixed point, 1 mass are suspended at both right hand and left hand of the meter. from
4 answers
asked by
Sekou
690 views
A fruit drops from the top of a tree 20m tall. The time it takes the fruit to reach the ground is
a=210m/s×s
5 answers
asked by
Segun
1,835 views
In order to weight a boy in the laboratory a uniform plank of wood A B 3.0m long, having a mass of 8.0kg is pivoted about a
9 answers
asked by
Sekou
790 views
Q23 How much work does it take to stretch a spring with k = 210 N/m
(a) 10 cm from equilibrium and (b) from 10 cm to 20 cm from
5 answers
asked by
Jay
3,587 views
While watching a softball game you see a play that makes you wonder how fast a fielder can react to a hit, run to the fence, and
4 answers
asked by
Tank
1,075 views
A 62kg cyclist changes the speed of a 12kg bicycle from 8.2m/s to 12.7m/s. Determine the work done.
Not sure how to start ! Do I
4 answers
asked by
A
1,457 views
Calculate the final centigrade temperature required to change 20 litres of gas at 120°C and 1 atmosphere to 25 litres at 2
9 answers
asked by
Busola
3,040 views
If 100 ml of water at 60 degree is added to 200 ml of water at 30 degree then the temperature in mixture is options A) 45 degree
4 answers
asked by
Shanti
4,767 views
A gas occupies 8 litres at 23'C and 70cmHg what is the volume at stp
5 answers
asked by
Rilwan
2,761 views
A spinning top has a diameter of 10 cm. A point on the outer rim of the top moves through an angle of 8¶ radians each second.
10 answers
asked by
Emanuel silver(Ag)
3,633 views
A shopping bag can provide a force of 65.0 N before breaking. A shopper puts 5.00kg of groceries in the bag. If the shopper
4 answers
asked by
Apple Annie
2,024 views
A car with 80cm diameter wheel starts from rest accelerates uniformly to a speed of 15 m/s in 30 second. Through How many
4 answers
asked by
Esayas
1,003 views
Does anyone have the answers to the physics b semester unit exam for Connexus?24 questions
4 answers
asked by
..
1,577 views
A resistor is to have a constant resistance of 30(ohm), independent of temperature. For this, an aluminum resistor with
4 answers
asked by
Nay Myo Myint Lwin
1,762 views
Two similar waves are traveling through the same medium. Wave A has a frequency that is 3 times that of wave B.
How do their
2 answers
asked by
Iwannaknow
160 views
Find the effort of a machine whose mechanical advantage is 3 where load is 30N
5 answers
asked by
Anonymous
1,491 views
The efficiency of a machine is 80% calculate the work done by a person using the machine to raise a load of 300kg through a
7 answers
asked by
Mario
3,739 views
A roller coaster goes through a vertical loop. When are the forces on the riders: the smallest and the greatest?
5 answers
asked by
Kalab
1,256 views
. An object has an excess charge of −8, 6 × 10−18 C. How many excess
electrons does it have?
4 answers
asked by
Isabella
991 views
A block with a weight of 36 N is placed on a sheet of aluminum with an inclination of 18. The coefficients of static and kinetic
4 answers
asked by
I need help
645 views
Calculate the work done by a stone mason in lifting of a mass of 15kg through a height of 2.0m to 200cm
4 answers
asked by
Delvin
365 views
A load of 30N is raised 2m when an effort of 10N moves through 8m .calculate velocity ratio
1 answer
asked by
Johnson ofori
145 views
Two point charges of 16 microcoulomb and - 9 microcoulomb are placed at8 cm distance. determine the position of the point at
5 answers
asked by
Harsh
4,809 views
A 0.250 kg ball swung on a 1.3 m string in a vertical circle. If it's tangential speed at the bottom of the path is 4.2 m/s,
4 answers
asked by
Happinessdelight
1,017 views
2. A person is walking in downtown Chicago. He starts 7 blocks north and 3 blocks west of the city’s center. He then walks to
13 answers
asked by
Babygirl
4,043 views
a uniform metre rule pivoted at R, the 70cm mark. Two forces 0.1 N and 0.4 N are applied at Q, the 60cm mark and S, the 85cm
5 answers
asked by
Richard
3,880 views
A footballer kicks a ball at an angle of 45° with the horizontal. If the ball was in air for 10 seconds and lands 4000meters
4 answers
asked by
Gabby
4,376 views
A 275 kg piano slides 4.2 m down a 30° incline and is kept from accelerating by a man who is pushing back on it parallel to the
4 answers
asked by
Naomi
1,029 views
The distance round a great circle is 40000km.What is the diameter of the great circle?
4 answers
asked by
Pro lambchop
659 views
A 70.0 kg skydiver falls towards the earth. If the force due to air resistance is 500 N, what is the acceleration of the
5 answers
asked by
Apple Annie
3,529 views
Vector A has magnitude of 40m at angel 225,if we want to add A to B so as to produce a resultant along the positive x-axis that
7 answers
asked by
Ben
1,787 views
A 6.0kg block initially at rest is pulled to the right along a horizontal, frictionless surface by a constant horizontal force
5 answers
asked by
Faith
6,829 views
A 2 kg ball is launched upward and has a kinetic energy of 25 J. Solve for the velocity of the ball as it was launched
A) 25 J B)
5 answers
asked by
Can you help me pls
1,745 views
Reflection and Refraction Quick Check
1. What does the image of an object look like through a convex lens when the object is
7 answers
asked by
Star Butterfly
2,279 views
A meter rule is placed horizontally at a fixed point while mass are suspended at both right and left hands of the ruler from the
3 answers
asked by
Zara
252 views
A series arrangement of three capacitor of value 8 microfarad 12 microfarad and 24 microfarad is connected in series with a 90
4 answers
asked by
Stella
177 views
A simple pendulum has a period of 4.50s when the length of the pendulum is shortened by 1.2m, the period is 2.50s. calculate the
4 answers
asked by
Frank
125 views
A skateboarder with a mass of 68.6 kg and a speed of 4.92 m/s coasts across a parking lot. After coasting for 35.0 m the
4 answers
asked by
Kennedi
1,314 views
Hi,
I'm stuck with the following question: The acceleration due to gravity on Mars is only 3.75m/s^2. You would like to modify an
4 answers
asked by
Grace
1,399 views
Sputnik, the first artificial satellite to orbit the Earth, had a mass of 83.6kg and travelled at 7574 m/s. The radius of the
4 answers
asked by
Grace
1,916 views
A spring of force constant 1500nm-1 is acted upon by a constant force of 75n.calculate the potential energy stored in the spring
7 answers
asked by
Meerat
2,475 views
A piece of metal with an irregular shape has a mass of 4.281kg. When weighed while submerged in water, the piece of metal has an
4 answers
asked by
physics help
1,242 views
1. The resultant of two forces X and Y will be greatest when the angle between X and Y solve it
7 answers
asked by
Halimoh
3,921 views
1.An elastic wire extend by 1.0cm when a load of 20g hangs from it.what additional load will be required to cause a further
5 answers
asked by
Cathy bens🐈
2,498 views
a capacitor 8uf is charged to a potential difference of 100v. the energy stored by the capacitor is?
4 answers
asked by
Robotic
1,967 views
The light waves transfer their oscillations and energy to other object in what way?
a The frequency of the light waves physically
4 answers
asked by
Pierre
1,177 views
Q2. Compare the two different scenarios of getting a heavy bag of cement to a height of 1 meter.
(a) Lifting the bag vertically
4 answers
asked by
MrMrMangohead
326 views
In an experiment to estimate the size of an oil molecule the diameter of the oil patch was measured to be 200mm for an oil drop
3 answers
asked by
Stecy
552 views
A car of mass 500kg is travelling along a flat road. The forward force provided between the car types and the road is 300N and
4 answers
asked by
Sundus
620 views
Considering that an up quark has a charge of +2/3 and a down quark has a charge of -1/3, which of the following represents the
4 answers
asked by
PENELEPOO
511 views
A plank AB 3m long weighing 20kg with its centre of gravity 2m from the end A carries a load of mass 10kg at the end A. it rests
4 answers
asked by
Emmanuel
293 views
A charged capacitor will discharge slowly, even if it's terminal are 'open circuit' that is ,not connected to anything this
4 answers
asked by
Hana
186 views
Find work done when 25kg weight lifted to a vertical height of 2m from the ground carrying to the same place by pushing it up
9 answers
asked by
Samarth
7,918 views
1. A cylindrical disk of wood weighing 45.0N and having a diameter of 30.0 cm floats on a cylinder of oil of density 0.850
5 answers
asked by
Francis
5,973 views
An extreme skier, starting from rest, coasts down a mountain slope that makes an angle of 25.0o with
the horizontal. The
7 answers
asked by
Eisya
8,193 views
A thread of mercury of length 15cm is used to trap some air in a capillary tube with uniform cross sectional area and closed at
4 answers
asked by
Rilwan
13,736 views
A commonly used unit of mass in the English system is the pound-mass, abbreviated lbm, where 1 lbm = 0.454 kg.What is the
3 answers
asked by
Carl
1,219 views
When potential difference across the terminals of a battery is measured using an analogue voltmeter of resistance 95 ohms, the
4 answers
asked by
Help pleaseeee
1,930 views
The screen of a pin-hole camera is a square, of side 0.16m and it is 0.15m behind the pinhole. The camera is placed 11m from a
9 answers
asked by
Anna Houston
1,908 views
A 2200 kg car can accelerate from 0 to 30.0 m/s in 5.5 seconds. What is the power required?
5 answers
asked by
mssailormouth
1,665 views
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