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yKpoI14uk [10]
3 years ago
8

Which statement correctly describes gravity?

Physics
1 answer:
Advocard [28]3 years ago
5 0

Answer:

a force that attracts matter to the earth

Explanation:

depends on where you are the gravity can be different in space there is no gravity on Earth there is , that's why when you jump you come back down

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Jaką masę ma ciał umieszczone na wysokości 100m, jeśli jego energia potencjalna jest równa 1 kJ? Zapisz wzór i obliczenia z jedn
Debora [2.8K]

Answer:

Masę, m = 1,02 kilograma

Explanation:

Biorąc pod uwagę następujące dane;

Wysokość = 100 m

Energia potencjalna = 1 KJ = 1000 dżuli

Wiemy, że przyspieszenie ziemskie wynosi 9,8 m/s².

Znaleźć masę obiektu;

Energię potencjalną można zdefiniować jako energię posiadaną przez obiekt lub ciało ze względu na jego położenie.

Matematycznie energia potencjalna jest określona wzorem;

P.E = mgh

Gdzie;

P.E reprezentuje energię potencjalną mierzoną w dżulach.

m reprezentuje masę obiektu.

g reprezentuje przyspieszenie ziemskie mierzone w metrach na sekundę kwadratową.

h oznacza wysokość mierzoną w metrach.

Podstawiając do wzoru, mamy;

1000 = m * 9,8 * 100

1000 = m * 980

Masę, m = 1000/980

Masę, m = 1,02 kilograma

6 0
3 years ago
A series circuit has four resistors. The current through one resistor is 810 mA. How much current is supplied by the
Serhud [2]

Answer:

Correct answer:  810 mA

Explanation:

In the series connection of a resistor,the current flowing through one resistor is the same through all four resistors and therefore throughout the entire electrical circuit.

God is with you!!!

8 0
3 years ago
Two point charges are fixed on the y axis a negative point charge q1-26 μC at y1 = +0.21 m and a positive point charge q2 art y2
11111nata11111 [884]

Answer:

3.13\times 10^{-5} C

Explanation:

We are given that

q_1=26\mu C=26\times 10^{-6} C

1\mu C=10^{-6} C

y_1=0.21 m

q=8.1\mu C=8.1\times 10^{-6} C

y_2=0.39 m

F=28 N

We have to find the magnitude of q2.

We know that

F=\frac{kq_1q_2}{r^2}

Where k=9\times 10^9

Using the formula

Force on charge q due to charge q1

F_1=\frac{9\times 10^9\times 26\times 10^{-6}\times 8.1\times 10^{-6}}{(0.21)^2}

F_1=42.98 N

Force on charge q due to point charge q2

F_2=\frac{9\times 10^9\times q_2\times 8.1\times 10^{-6}}{(0.39)^2}

F_2=4.79\times 10^5 q_2

F=F_1-F_2

28=42.98-4.79\times 10^5q_2

4.79\times 10^5q_2=42.98-28=14.98

q_2=\frac{14.98}{4.79\times 10^5}=3.13\times 10^{-5} C

8 0
3 years ago
How was the speed of light determined
goblinko [34]
Presently, the speed of light in a vacuum is defined to be exactly 299,792,458 m/s (approximately 186,282 miles per second). . An early experiment to measure the speed of light was conducted by Ole Romer, a Danish physicist, in 1676. Using a telescope, Ole observed the motions of Jupiter and one of its moons, Io
5 0
3 years ago
Read 2 more answers
During the water cycle, solar energy causes water to change from a _____ to a ______.
tankabanditka [31]
Liquid to a gas hence the name water vapor 
3 0
3 years ago
Read 2 more answers
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