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Fittoniya [83]
3 years ago
15

An archer shoots an arrow into a target using a bow. If the "action" force is the force of the bowstring against the arrow, what

is the "reaction force?
a. the arrow's push against the bowstring
b. weight of the arrow
c. the archer's hand gripping the bowstring
d. the bowstring's force on the bow
Physics
1 answer:
aliya0001 [1]3 years ago
8 0
Weight of an arrow is 20 plus 3
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A 142 kg boulder is located near the edge of a cliff 25 m above the ground. What is the gravitational potential energy of the bo
jarptica [38.1K]
PE = mass * height * 9.81
PE = 142 * 25 * 9.81
PE = 34825.5 J
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3 years ago
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An RC circuit consists of a resistor with resistance 1.0 kΩ, a 120-V battery, and two capacitors, C1 and C2, with capacitances o
Serhud [2]

Answer:

Q_t= 8.3 * 10^3 C

Explanation:

From the question we are told that:

Resistor R=1000ohms

Voltage v=120_V

Capacitance of c_1 c_1=20 \mu F

Capacitance of c_2 c_2=60 \mu F

Time t=0

Generally the equation for charges is mathematically given by

For C_1\\Charge\ on\ C_1 = CV = 20*120 = 2400 μC = 2.4 x 10^-3 C\\Charge\ on\ C_1 = 2400 μC = 2.4 x 10^-3 C\\Charge\ on\ C_1 = 2.4 x 10^-3 C\\

ForC_2\\Charge on C_2 = 60*120 =7200 μC =  7.2 x 10^-3\\Charge on C_2 =  7.2 x 10^-3

Generally the equation for voltage across capacitors is mathematically given by

V_c(t)=V(1-e^{-t/RC})

C=C_1+C_2=80 \mu f\\t=2RC=>160000s

V_c(t)=120(1-e^{-(160000)/1000*(80)})

V_c(t)=103.7598

Generally the equation for charges is mathematically given by

Q1(t) = C1Vc(t)\\Q1(t) = 20*103.7598\\Q1(t) = 2075.196\\\\Q2(t) = 60*103.7598\\Q2(t) = 6225.6\\

Generally the equation for total charges Q_t is mathematically given by

Q_t=Q1(t)+Q2(t)

Q_t= 8.3 * 10^3 C

5 0
3 years ago
When developing an experiment design, which could a scientist take to improve the quality of the results?
Bad White [126]

The options missing are;

A. Make only a few changes to the manipulated variable.

B. Identify any biases about the answer to the scientific question.

C. Include as many details as possible when writing the conclusion.

D. Share her ideas through peer review.

Answer:

B. Identify any biases about the answer to the scientific question.

Explanation:

Since the question is asking what can be done to improve the quality of the results, it means what can the scientist do to make sure that the result answers the question properly and has little or no biases.

Thus, looking at the options, the only one that comes close to actually improving on the quality of the results before finalizing is option B where the scientist is to identify any biases.

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Objects appear different in size and shape in a container of water due to
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Answer:

A. refraction of light waves

Explanation:

Refraction happens when light travels from one medium to another and changes speed and bends. This also causes objects to look different sizes and shapes when they are submerged in water.

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Sam has been working to improve his muscular fitness. He jumps rope and trains with weights. What will most likely be the result
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