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Recent questions and answers in Physics
How far should pencil held from a convex mirror of radius 80 cm to form an image one-half the size of the pencil?
Tanner Semerad
answered
Jan 4
by
Tanner Semerad
8.6k
points
Physics
high-school
1
answer
4
votes
37.2k
views
Larvae and pupae normally float. They must use their muscles in order to dive down through water. What type of energy is used by the muscles? O Sound energy from the air O Thermal energy from the water
Iamalismith
answered
Jan 4
by
Iamalismith
8.3k
points
Physics
high-school
1
answer
3
votes
3.7k
views
Using your data, after finding initial velocities, how far does a rocket travel if its initial time was 1 second? A) 1 kilometer B) 2 kilometers C) 3 kilometers D) It depends on additional factors
DerpyNerd
answered
Jan 4
by
DerpyNerd
7.8k
points
Physics
high-school
1
answer
5
votes
112k
views
The half-life, t, for a particular radioactive element is ______ min. Find the decay rate of the element.
ItsMasoud
answered
Jan 4
by
ItsMasoud
8.7k
points
Physics
high-school
1
answer
5
votes
223k
views
Vacuum contacts A. Are quieter in operation than standard contactors B. Can control higher voltages in a smaller space C. Are more economical to purchase than conventional contactors D. Require the connection
David Rasuli
answered
Jan 4
by
David Rasuli
8.4k
points
Physics
high-school
1
answer
4
votes
205k
views
A wire 100 cm long is bent to form a triangle. The middle-sized side of the triangle is 2 cm longer than one side and 6 cm shorter than the other side. What are the lengths of the three sides? a) 20 cm,
Warren Blanchet
answered
Jan 4
by
Warren Blanchet
7.9k
points
Physics
high-school
1
answer
1
vote
28.4k
views
A bucket that weighs 5 lb and a rope of negligible weight are used to draw water from a well that is 70 ft deep. The bucket is filled with 38 lb of water and is pulled up at a rate of 2.5 ft/s, but water
Domnic
answered
Jan 4
by
Domnic
8.2k
points
Physics
high-school
1
answer
1
vote
123k
views
A long pipe is connected to a tank. Water flows through the pipe at 10 km/hr to fill 2200 m³ of the tank in 7 hours. What is the radius of the pipe? (a) 0.25 m (b) 0.50 m (c) 0.75 m (d) 1.00 m
Ruudjah
answered
Jan 4
by
Ruudjah
9.1k
points
Physics
high-school
1
answer
4
votes
41.1k
views
a force of f=20x−x3n stretches a nonlinear spring by x meters. what work is required to stretch the spring from x=0 to x=3m ?
Luis Pereira
answered
Jan 4
by
Luis Pereira
7.9k
points
Physics
high-school
1
answer
0
votes
191k
views
If a 6-kilogram mass is dropped, it will strike the ground with a force of 58.8 newtons. Use Newton's Second Law of Motion to find the rate of acceleration."
PoPaTheGuru
answered
Jan 4
by
PoPaTheGuru
8.2k
points
Physics
high-school
1
answer
5
votes
199k
views
A musician hits a drum with a drumstick. In three to four sentences, explain the collision forces between the drum and drumstick. Help needed!
JBildstein
answered
Jan 4
by
JBildstein
7.9k
points
Physics
high-school
1
answer
2
votes
234k
views
if a person pushes the 5 kg door with 7 N of force, what is the acceleration of the door when it opens?
Benelgiac
answered
Jan 4
by
Benelgiac
7.9k
points
Physics
college
1
answer
1
vote
105k
views
A vector makes an angle,��, with the horizontal. The horizontal and vertical components of the vector will be equal in magnitude if angle�� is? 1) 30 degrees 2) 45 degrees 3) 60 degrees 4) 90 degrees
Jonua
answered
Jan 4
by
Jonua
7.9k
points
Physics
high-school
1
answer
0
votes
83.4k
views
A 70 kg astronaut is moving at 12 m/s and collides with a 60 kg astronaut moving at -5 m/s. What is the total momentum of both astronauts before they collide? a) 840 kg·m/s b) 180 kg·m/s c) -240 kg·m/s
Petre Popescu
answered
Jan 4
by
Petre Popescu
7.8k
points
Physics
high-school
1
answer
0
votes
51.9k
views
A stack thermometer commonly has a range from a. 0 to 500°F b. 300 to 500°F c. 200 to 1,000°F d. 500 to 1,000°F
Andrew Beals
answered
Jan 4
by
Andrew Beals
9.0k
points
Physics
high-school
1
answer
0
votes
164k
views
romeo is throwing pebbles gently up to juliet's window, and he wants the pebbles to hit the window with only a horizontal component of velocity. he is standing at the edge of a rose garden 8.0 m below
Loki
answered
Jan 4
by
Loki
9.0k
points
Physics
high-school
1
answer
1
vote
27.0k
views
The vertex of the parabola below is at the point (2,-4). Which of the following could be this parabola's equation? A. y = x² B. y = (x - 2)² - 4 C. y = 4x² + 4 D. y = (x + 2)² + 4
Steve Amerige
answered
Jan 4
by
Steve Amerige
8.3k
points
Physics
high-school
1
answer
5
votes
207k
views
A bucket of water (m=2.0 kg) is attached to a 0.80-m long string and spun in a vertical circle. The speed of the water at the bottom of the circular path is 6.0 m/s. (a) What is the force of gravity? (b)
Lillemets
answered
Jan 4
by
Lillemets
8.7k
points
Physics
high-school
1
answer
5
votes
165k
views
Describe the postulate on which Einstein based the theory of general relativity and describe an everyday experience that illustrates this postulate. A. Gravity and velocity have the same effect and cannot
PermanentGuest
answered
Jan 4
by
PermanentGuest
7.9k
points
Physics
high-school
1
answer
0
votes
139k
views
A man travels 7.0km due north, then 10.0km east. Find the resultant displacement..
Lansana Camara
answered
Jan 4
by
Lansana Camara
8.2k
points
Physics
high-school
1
answer
5
votes
20.4k
views
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