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Physics
Page 66
Questions (147,174)
When is the average velocity of an object equal to the instantaneous velocity?
a) always b)never c) only when velocity is
3 answers
asked by
Tammy
3,141 views
An object moves across a straight line so that after t seconds, is distance from its starting point is: D(t)=t^3 - 12t^2 + 100t
3 answers
asked by
becky
811 views
Use the following table to answer the question:
The following samples are all water. Other than the temperature, all the water
3 answers
asked by
redredered
352 views
Which of the following has a higher kinetic energy?
A 1000 kg car rolling at a speed of 5 m/s across the floor or a 1500 kg hippo
3 answers
asked by
dv
286 views
According to Newton’s third law of motion, which statement is always correct?(1 point)
3 answers
asked by
sebastian chapa
795 views
Pulleys and Inclined Planes Quick Check
1 of 41 of 4 Items Question Use the picture to answer the question. An illustration shows
13 answers
asked by
who dat
700 views
Two vectors p and q of magnitude 5 and 3 units respectively are inclined at an angle of 30o to each other.calculate the
3 answers
asked by
Love
456 views
A blacksmith heated a metal whose cubic expansivity is 6.3^-6k-1. The area expansivity of the metal is …….
4 answers
asked by
Samson
392 views
The model for radioactive decay is y=y0e−kt. A radioactive substance has a half-life of 230 years. If 35 grams are present
4 answers
asked by
Heather
577 views
calculate q when a system does 72g of work and its internal energy decrease by 90j
3 answers
asked by
racheal
317 views
as shown in the figure a bullet of mass 0.010 kg moving horizontally suddenly strikes a block of wood of mass 1.5 kg that is
3 answers
asked by
john paul
2,982 views
While lifting a load of 200N using lever an effort of 80N moved through a distance of 20cm to lift the load through a distance
6 answers
asked by
Baraka
913 views
A spring of natural length 30.0cm is stretched 35.0cm by a load of 15N Cal calculate the extension produce
Pls answer nowwww
6 answers
asked by
Somto
871 views
The acceleration due to gravity on the moon is 1.6 N/Kg. An astronaut weighs 670N on the earth's surface
A. Find the mass of the
4 answers
asked by
Wycliffe isoe
2,445 views
A uniform half metre rule is balanced horizontally across a knife edge placed 15cm from one end . A mass of 30g is hung from the
4 answers
asked by
Anonymous
1,563 views
A ball thrown vertically upwards from ground level hits the ground after 4s. Calculate the maximum height it reached during
3 answers
asked by
Abdullahi
1,081 views
A circuit contains a resistor in series with a capacitor, the series combination being connected across the terminals of a
3 answers
asked by
Coco
3,816 views
two resistors R1=-4 ohms and R2=5 ohms, are connected parallel across a potential difference. if P1 and P2 represents the power
3 answers
asked by
Robotic
1,373 views
A block of wood weighing 25 N is submerged under water. If the net force on the wood is 5 N upward, how much buoyant force is
3 answers
asked by
Science
2,000 views
A 68 g ice cube at −23◦C is dropped into a container of water at 0◦ C.
How much water freezes onto the ice? The specific
3 answers
asked by
Reese
5,405 views
In a stunt, three people jump off a platform and fall 9.9 m onto a large air bag. A fourth person at the other end of the air
3 answers
asked by
MUHAMMAD JUNAID
2,515 views
Use the heating curve of 50 g of water and the list of values to answer the question.
specific heat of ice = 2.10 J/(g·°C)
6 answers
asked by
Summer
2,446 views
A boy jumps from a wall 3m high. What is an estimate of the change in momentum of the boy when he lands without rebounding?
the
4 answers
asked by
physics8ater
3,429 views
a ray of light strikes a rough surface such that the angle of incidence is 40.0. what is the angle of reflection
1. 0 degrees 2.
3 answers
asked by
paul
1,401 views
What would the slope represent in a torque vs force graph, and what would its units be. I graphed the points and got a slope of
4 answers
asked by
Brad
2,421 views
Calculate the length of a displaced pendulum Bob which pass through its lowest point twice every second. Take g=10m/s²
3 answers
asked by
Majiri
1,934 views
a body is moving in a vertical circle such that the velocities of body at different points are critical the ratio of velocities
5 answers
asked by
Thousif
2,850 views
Two boys weighing 60 pounds and 80 pounds balance a seesaw. How many feet from the fulcrum must the heavier boy sit if the
4 answers
asked by
jade
1,937 views
A 30 kg child sits in a swing supported by two chains, each 1.4 m long.
(a) If the tension in each chain at the lowest point is
3 answers
asked by
alicia
2,610 views
what is the maximum torque on a rectangular coil 5 cm x 12 cm and with 600 turns when carrying a current of 0.0700A in a uniform
4 answers
asked by
alan
2,097 views
a constant force applied at an angle of 20 above the horizonal , pulls a 200 kg block, over a distance of 3 m, on a rough,
3 answers
asked by
Anonymous
676 views
Two bodies a and b masses 4kg and 2kg move towards each other with velocities 3m/s and 2m/s and collide. If the collision is
3 answers
asked by
wealth
1,356 views
A rectangular wire loop with current i=200mA, width W=20cm and length L=50cm is placed in a uniform magnetic field B=7T as
3 answers
asked by
JuanPro
745 views
The distance to the nearest 100,000 km from the earth to the moon is given as 400,000 km. The average speed to the Nearest
4 answers
asked by
Fay
1,048 views
A uniform beam has a weight of 500N(acting at the centre of the beam). It also carries a point load of 1,2kN at the centre of
3 answers
asked by
Bongani
1,113 views
A yacht is moving at 10kmh in a south easterly direction and encounters a 3kmh current from the north. Find the actual speed and
3 answers
asked by
Bubbles
960 views
A ball is thrown horizontally from the top of a cliff 20m high. If the initial horizontal velocity is 8.0m/s,find how long it
4 answers
asked by
Abigail
1,785 views
An observer uses a 10 sided mirror to measure the speed of light. A clear image occurs every one-tenth of a rotation when the
3 answers
asked by
sam
833 views
A body of mass 6kg moving at 8m/s collides with a stationary body of mass 10kg and sticks to it. Find the speed of the composite
3 answers
asked by
Dan
1,061 views
An object is fired vertically upward with an initial speed of 68.6 meters/second. After t seconds, the height is shown by
y =
3 answers
asked by
Amy
544 views
A system consisting of two fixed and two movable pulleys has a mechanical advantage of 4.00. If a force of 124 N is exerted,
4 answers
asked by
Paul
1,457 views
The speed of all electromagnetic waves in
empty space is 3.00 × 108 m/s. What is the wavelength of visible light emitted at 7.2
3 answers
asked by
megan
3,110 views
"A jogger runs with a velocity of 6.0 km/h [25° N of W] for 35 min and then changes direction, jogging for 20 min at 4.5 km/h
4 answers
asked by
Pravda
1,105 views
Before a collision, a 24 kg object is moving at +13 m/s. Find the impulse that acted on the object if, after the collision, it
3 answers
asked by
Anonymous,
1,233 views
Topic:machine,a block and tackle of 6 pulleys is used to raise a load of 300N steadily through a height of 30m.if the work done
4 answers
asked by
Chigozie
814 views
A child sits down on one end of a horizontal seesaw of negligible weight, 2.14 m from the pivot point. No one balances on the
5 answers
asked by
Kellie
1,029 views
Find the minimum diameter of a 51.5-m-long nylon string that will stretch no more than 1.01 cm when a load of 68.9 kg is
3 answers
asked by
maria
1,057 views
A spring exerts a 17 N force after being stretched by 3.0 cm from its equilibrium length. By how much will the spring force
3 answers
asked by
falcon306
1,641 views
what is the power dissipated by the parallel circuit shown below?
r1 is 100 ohms r2 is 100 ohms r3 is 100 ohms e= 40 v
3 answers
asked by
kathrine
669 views
A roller coaster of mass 1000.0 kg passes point A with a speed of 1.80 m/s?
point a= 30m point b= 0m point c= 25m point d= 12m 1.
4 answers
asked by
aly
3,157 views
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