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physics
Page 7
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two forces 4n and 5n act on a body in direction due north and due east respectively calculate their equilibria
1 answer
asked by
sam
326 views
schoolgroup needs to travel 345km to reach their camping. if from school they leave at 7.25am and the bus move at an average
1 answer
asked by
ron
155 views
.A climber of mass 80 kg is on a steep rock face. The force X
that the rock exerts on the climber is at an angle of 50° to the
4 answers
asked by
fikre
455 views
You stumble and accidentally toss your car keys horizontally at 50 m/s from a cliff that is 45 m high. How far from the base of
3 answers
asked by
sdjhudf
372 views
A microwave rated at 1000 W heats a 500-g glass of water from 10°C to 55°C in 2.0 min. Determine the efficiency of the energy
1 answer
asked by
student
187 views
four resistor of resistance 1ohms2ohm3 ohm 5ohm are connected in series and afterward in parallel calculate the combined
2 answers
asked by
tomisin
231 views
A labourer raises a load of mass 120kg by using a system of 6 pulleys he exert a force of 400N 400N on the rope calculate
5 answers
asked by
yusuf
464 views
a motor car in rectilinear motion steadily decelerates to rest in 20s. using newton's second law of motion explain why a higher
1 answer
asked by
Bankole Busola
221 views
Suppose a radio signal travels from Earth and through space at a speed of 3.0 × 108 m/s. How far into space did the signal
3 answers
asked by
Kaylee
1,072 views
A race car goes around a level, circular track with a diameter of 1.00 km at a constant speed of 104 km/h. What is the car's
1 answer
asked by
Victoria
265 views
are my answers right?
Which object would have the highest gravitational attraction? A. compact car B. bicycle C. semi truck ** As
3 answers
asked by
ya
653 views
When a boy is sitting 1 meter from the center of a see-saw, another boy must sit on the opposite side 0.5 meter farther from the
1 answer
asked by
Ace
325 views
The gravitational field in density at a location x in space is two-fifth of its value of the eath surface. If the weight of an
1 answer
asked by
mercy
217 views
There is a rectangle of length 2.60 cm and width 4.80 cm in the xy-plane. If the electric field can be expressed by (28.0i^ +235
1 answer
asked by
mike
179 views
The electric field in a region of space can be expressed by (285i^ + 1.13×10^3j^ + 796k^) N/C. If a circle of diameter 15.0 cm
3 answers
asked by
mike
264 views
In the figure above, the negative charge has a magnitude of 40.0 nC (and lies inside the doughnut shape) and the positive charge
1 answer
asked by
mike
374 views
A thin copper plate of diameter 6.00 cm is charged to 6.50 nC. What is the strength of the electric field 0.1 mm above the
1 answer
asked by
mike
265 views
A thin copper plate of diameter 6.00 cm is charged to 6.50 nC. What is the strength of the electric field 0.1 mm above the
1 answer
asked by
Anonymous
169 views
A truck travels up a hill with a 13◦
incline. The truck has a constant speed of 18 m/s. What is the horizontal component of the
1 answer
asked by
Abby
190 views
If a 5 kg ball is accelerating at 1.2 meters per second square, what is the force on it?
1 answer
asked by
cola
147 views
A box is dropped from the roof of a 30m building. As it falls, it passes a window that is 2
meters high and whose base is located
1 answer
asked by
jon
202 views
(9.8+15/.350*cos65)j+(15/.350*sin 65)i
1 answer
asked by
miracle
195 views
. In a Young double slit experiment the fringe separation produced by a wavelength of
5.00 x10-7m is 2mm at a distance of 2.5m.
1 answer
asked by
keko
194 views
Light consisting of two wavelengths which differ by 160nm passes through a diffraction grating with 2.5 x105
lines per meter. In
1 answer
asked by
keko
250 views
A boy pulls a sled with a force of 10.0 lb for 100.0 ft. The rope attached to the sled is at an angle 30.0 ̊ above the
1 answer
asked by
juan
215 views
A constant force acts on a 5kg scooter and reduces its velocity from 7m/s to 3m/s. What is the net force on the scooter
1 answer
asked by
Marsilas
180 views
A 0.67-kg object is attached to one end of a spring, as in the first drawing, and the system is set into simple harmonic motion.
1 answer
asked by
ff
256 views
A plane is flying south at 155 km/hr and encounters a wind from the east at 60.0 km/hr. What is the plane’s new velocity with
1 answer
asked by
Anonymous
194 views
a pulley has a moment of inertia of 5.0 kgm2 and radius of 0.5m the cord supporting the masses m1=2kg m2=5kg doesnot slip,and
1 answer
asked by
mismima
235 views
Study the scenario.
The particles in some system are moving around quickly. A few minutes later, the particles are moving, on
1 answer
asked by
DAN
288 views
An object is launched at a velocity of 20 m/s in a direction making an angle of 25° upward with the horizontal. What are the
a)
1 answer
asked by
zein shion
263 views
An arrow is shot at 30.0° angle with the horizontal. It has a velocity of 49 m/s.
a. How high will it go? b. What is the total
1 answer
asked by
zein shion
293 views
If the work required to speed up a car from 10 km/h to 20 km/h is 5.0 X 10^3 J, what would be the work required to increase the
3 answers
asked by
s
312 views
An 8.0 Ω resistor is connected to 20 V.
a. Find I b. Find how much energy is transformed in 12 minutes
1 answer
asked by
Veronica
127 views
A stone is thrown from the edge of the top of a 40 m tall building, at some unknown angle,θ, above the horizontal. The stone
1 answer
asked by
Anonymous
229 views
If the mass of an object is 0.5 kg and in freefall, only gravity acting on it, what is the acceleration?
1 answer
asked by
yo
155 views
the spiral spring of
1 answer
asked by
Anonymous
114 views
A car travelling at 81 km/h slams on the brakes. The car comes to a stop after 2.9 s. What is the force from the seatbelt acting
1 answer
asked by
shang chi
217 views
When a rock is thrown straight up in the air, after it leaves the hand, the rock begins to slow down. This occurs because:
1 answer
asked by
fqwf1qf
151 views
A X-ray photon is scattered at an angle of 180 from an electron that is initially at rest. after scattering, the electron has a
1 answer
asked by
gjirjg
79 views
if a man weight 900N on earth , what is his weight on Jupiter where the acceleration due to gravity is 25.9m/s²?
2 answers
asked by
minicho
96 views
Aman has a mass of weight if the accleration fue to gravity is1/4 that is of the earth
1 answer
asked by
nassuna
73 views
A man driving his car on I-85 notices his location at mile marker 25. Two hours later, he looks and sees mile marker 250. What
1 answer
asked by
joshua
96 views
four forces act as shown in figure 12n, 10n, 9n, 15n calculate their resultant
1 answer
asked by
chinaza
93 views
The relative density of a steel is 7.8. Find the mass of a solid steel cube of side 10cm. What volume of the steel has a mass
1 answer
asked by
Anita
111 views
You are driving a car behind another car. Both cars are moving at speed 80 km/h. Assume your brakes are just a bit harder than
1 answer
asked by
Anonymous
71 views
A speeder passes a parked police car at a
constant speed of 39.7 m/s. At that instant, the police car starts from rest with a
1 answer
asked by
kiki
98 views
While driving his sports car at 20.0 m/s down a four lane highway, Eddie
comes up behind a slow-moving dump truck and decides to
3 answers
asked by
kaylee
112 views
A ball is thrown horizontally from the top of a 63.0-m building and lands 111.8 m from the base of the building. Ignore air
1 answer
asked by
Anonymous
114 views
If a resistance is added in series to a circuit, the circuit resistance is then:
1 answer
asked by
Anonymous
50 views
A body of mass 2kg falls freely from rest through a height of 50m and come to rest having penetrated 5.0cm of sand. calculate
1 answer
asked by
Anonymous
76 views
Air is an insulator. However, in winter you might experience a spark when your fingers touch a doorknob.
1 answer
asked by
John
119 views
An astronaut on the moon throws a wrench straight up at a velocity of 4 m/s. Three seconds later it is seen traveling downwards
1 answer
asked by
mary
81 views
Calculate the speed at the edge of a disc of radius 8.5 cm that rotates at the rate of 2.5 rev/s.
Answer in units of m/s.
1 answer
asked by
Anonymous
86 views
Young David, who slew Goliath, experi- mented with slings before tackling the gi- ant. He found that with a sling of length
1 answer
asked by
Anonymous
85 views
A 4.0kg bowling ball is rolling down the lane at 5m/s. What is the kinetic energy of the bowling ball?
2 answers
asked anonymously
110 views
what is the potential energy of a 4.0kg bowling ball if it is 2 meters off the ground
1 answer
asked anonymously
61 views
A ferry is crossing a river. If the ferry is headed due north with a speed of 3.2 m/s relative to the water and the river's
2 answers
asked by
vfgfj
103 views
A big ship moves at 32 m/s North relative to the water. Inside the ship, a kid runs at 1.5 m/s at an angle 30 degree north of
1 answer
asked by
vfgfj
79 views
A boat heading north crosses a wide river with a velocity 15 km/h relative to the water. The river has a uniform velocity of 8
1 answer
asked by
vfgfj
86 views
A spy runs from the front to the back of an aircraft carrier at a velocity of 3.5 m/s. If the aircraft carrier is moving forward
1 answer
asked by
vfgfj
115 views
A passenger at the rear of a train traveling at 15 m/s relative to Earth throws a baseball with a speed of 15 m/s in the
2 answers
asked by
vfgfj
54 views
which of the following surfaces is the best absorber of radiant energy
a.white b.yellow c.black d.red
1 answer
asked by
nadia
66 views
For general projectile motion with no air resistance, the vertical component of a projectile's acceleration
A) is always zero. B)
1 answer
asked by
vfgfj
93 views
For general projectile motion with no air resistance, the horizontal component of a projectile's velocity
A) remains zero. B)
1 answer
asked by
vfgfj
73 views
A stone is thrown horizontally with an initial speed of 10 m/s from the edge of a cliff. A stopwatch measures the stone's
1 answer
asked by
vfgfj
133 views
In an air-free chamber, a pebble is thrown horizontally, and at the same instant a second pebble is dropped from the same
1 answer
asked by
vfgfj
129 views
A pilot drops a package from a plane flying horizontally at a constant speed. Neglecting air resistance, when the package hits
1 answer
asked by
vfgfj
185 views
two discs are located on the same axis the lower disc i1(8kgm^2is initialy rottating with angular velocity 4rad/sec and the
1 answer
asked by
brukty
69 views
A cylindrical storage tank has a radius of 1.47m. When filled to a height of 3.26m, it holds 15800kg of a liquid industrial
1 answer
asked by
olivia
81 views
A person who weighs 539 N is riding a 77-N mountain bike. Suppose the entire weight of the rider plus the bike is supported
1 answer
asked by
olivia
95 views
united states currency is printed using intaglio presses that generate a printing pressure of 7.1 x 10^5 lb/in^2. a $20 bill is
1 answer
asked by
olivia
151 views
at a given instant, the blood pressure in the heart is 1.9 x 10^4 Pa. if an artery in the brain is 0.53m above the heart, what
1 answer
asked by
olivia
71 views
A 50 kg passenger is travelling in a 700 kg (NOT including the passenger) elevator. The passenger notices that her apparent
1 answer
asked by
student
79 views
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