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Physics
Page 4
Questions (147,512)
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
2,844 views
A rectangular of mass 10kg rest on an inclined plane with a coefficient of static friction of 0.55 and coefficient of kinetic
7 answers
asked by
elizabeth luhoya
2,744 views
A horizontal pipe has a cross sectional area of 40.0 cm^2 at the wider portions and 10.0 cm^2 at the constriction. Water is
7 answers
asked by
Jen
2,522 views
On Earth, the gravitational force of a certain military drone is 6.0 kg. What is the helicopter's gravitational force if it is
1 answer
asked anonymously
219 views
The heat capacity of a material shows the amount of heat that can be taken in before the material increases in temperature.
6 answers
asked by
SPAMTON G SPAMTON
1,127 views
A stone is thrown up with a velocity of 20 m/s. While coming down, it strikes a glass pan, held at half the height through which
5 answers
asked by
Adnan
1,658 views
A 61-kg skier, coasting down a hill that is an angle of 23 to the horizontal, experiences a force of kinetic friction of
5 answers
asked by
Tristan
4,102 views
Pepe and Alfredo are resting on an offshore raft after a swim. They estimate that 3m separates a trough and an adjacent crest of
5 answers
asked by
Zoey
3,772 views
The acceleration of a particle is defined by the relation a=-8m/s2. Knowing that x=20m when t=4 and that x=4m when v=16m/s.
7 answers
asked by
ben
5,219 views
A 52 kg woman is standing in a 26 kg cart that is moving a velocity of 1.2 m/s S. The woman staying rest then moves at a
4 answers
asked by
Anna
2,241 views
Consider the two-slit interference experiment. Electromagnetic radiation passes through the two slits that are a distance 0.0287
7 answers
asked by
Mimi
1,204 views
A 45 kg girl is sitting on one end of a see-saw, 0.6 m away from the the pivot pt. How far away form the pivot pt must a 60 kg
4 answers
asked by
Hannah
4,683 views
You are fishing in a boat anchored in a bay. You notice that the current is in the eastern direction with small wave crests that
4 answers
asked by
soggy bob ross
532 views
a 600g object is tied to a string 1m long and its rotated in a horizontal circl eof radius 0.8m. thus the tension produced on
4 answers
asked by
nikhil
1,146 views
Hi guys how do I calculate residual driving force, driving force is 3000 air resistance is 370 N and rolling resistance is 160
7 answers
asked by
Anonymous
2,297 views
1. A bottle of water is taken out of a refrigerator and put on a kitchen table. As the bottle of water warms up, what happens to
6 answers
asked by
Davion
4,154 views
the crest of wave A has an amplitude of 5 cm. the trough of wave B has an amplitude of 2 cm. if the crest of wave A combines
18 answers
asked by
Victoria
5,608 views
Use the word bank to complete the following paragraph. **Some words may not be used**
There are two types of circuits: series
2 answers
asked by
social studies
211 views
What creates the magnetic force in an electromagnet?(1 point)
Responses electric current iron or steel core coiled wire battery
4 answers
asked by
456789
216 views
which term refers to the rate of electricity passing through a circuit
5 answers
asked by
joe
1,985 views
if two forces 10N and 20N are inclined at angle 60degree to each other. Find the resultant force.
16 answers
asked by
John
13,220 views
An astronaut of mass m in a spacecraft experiences a gravitational force F=mg when stationary on the launchpad.
What is the
6 answers
asked by
Ariana
10,168 views
Workers have loaded a delivery truck in such a way that its center of gravity is only slightly forward of the rear axle. .63m in
5 answers
asked by
shai
9,934 views
A 50.0-kg block is being pulled up a 13 degree slope by a force of 250 N which is parallel to the slope. The coefficient of
4 answers
asked by
Kathy
8,348 views
Given a 10-V power supply, would a 20-ohm resistor and a 5-ohm resistor need to be arranged in parallel or in series to generate
16 answers
asked by
Abby
3,103 views
What happens when thermal energy is applied to an ice cube
It's water molecules lose kinetic energy so the ice cube melts It's
3 answers
asked by
Hi
310 views
A weight is oscillating on the end of a spring. The position of the weight relative to the point of equilibrium is given by
6 answers
asked by
Nicole
7,886 views
a concave mirror has a radius of curvature of 0.4 m find the position and the size of the image of an object 0.2 m high placed
5 answers
asked by
namanpreet
7,096 views
A science class is planning an investigation about gravity and objects on Earth. In three to four sentences, explain the steps
9 answers
asked by
Willie Lawson
2,256 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
1,435 views
A diver leaves a 3-m board on a trajectory that takes her 2.7m above the board and then into the water 2.9m horizontally from
5 answers
asked by
PLS HELP!!
6,883 views
explain,using the kinetic theory what happens to the particles in oxygen as it is cooled down.
7 answers
asked by
fina
3,130 views
a 600N person picks up a 180 N suitcase positioned so that the suitcase's center of gravity is 20cm lateral to the location of
4 answers
asked by
justine
3,802 views
Calculate the power output of a 1.3-g fly as it walks straight up a windowpane at 2.5 cm/s
5 answers
asked by
Lizbeth
7,075 views
A particle moves along a line so that at time t, where 0<=t<=pi, its position is given by
s(t)= -4cost-((t^2)/2)+10 What is the
7 answers
asked by
Rachel
13,014 views
5. A student has the following data: V1 = 822 mL, T1 = 75°C and T2 = -25°C. He calculates V2 and gets -274 mL is this value
4 answers
asked by
Evie
4,196 views
A load of 80N extends a spring by 8cm. When the load is replaced by a copper block, the extension produced is 10cm. Calculate
5 answers
asked by
Axelle
2,120 views
An alternating current and a direct current flows simultaneously in the same conductor. if the effective value of the
5 answers
asked by
Student
3,100 views
X, Y and Z are three points on a straight road.A car passes X with a speed of 5m/s and travels from X to Y with a constant
5 answers
asked by
Ajila Ayobami
3,927 views
Which statement includes a description of velocity? (1 point)
O A bicycle moves 8 meters per second. O A marble rolls 30
13 answers
asked by
Idb
5,154 views
Forces with magnitudes of 250 pounds and 130pounds act on an object at angles 45degrees and -60degrees respectively with the
4 answers
asked by
Anonymous
4,543 views
A ringing alarm clock is put under a glass jar. The air is slowly removed from the space around it. What will happen as the air
10 answers
asked by
bobby
2,129 views
The acceleration of gravity on the moon is 1.62 m/s2. If a ball is dropped on
the moon from a height of 1.50 m. Determine the
7 answers
asked by
Nic Balasuela
5,282 views
Electrons are ejected from a metallic surface with speeds ranging up to 4.50x10^5 m/s when light with a wavelength of 615nm is
5 answers
asked by
genius
7,052 views
A 300lb car is moving at constant velocity onn a level concrete road. How much force is needed to keep it moving if the u=0.04
4 answers
asked by
bits
1,527 views
I was wondering if my answers are correct.
1. A 50kg person is taking a ride on an elevator travelling up at a steady speed of
7 answers
asked by
Liz
5,040 views
The MRT train starting at an initial velocity of 30 kph travels a distance of 21km in 18 minutes. Determine the acceleration of
4 answers
asked by
X188O
2,162 views
How much air is needed to fill a basketball with a diameter of 9 inches? Use 3.14 as an approximation for pl. Round your answer
1 answer
asked anonymously
244 views
Which of the following statements about electrical charges is true?
Opposite electrical charges repel one another. Like charges
1 answer
asked anonymously
73 views
The position of an object connected to a spring varies with time according to the expression x = (7.1 cm) sin (2.1π t). Find
(a)
4 answers
asked by
Tom
7,088 views
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